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Konara, Mudiyanselage Iresha Shamini Dharmasena. "Model Predictive Control of Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1535203021942922.
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De, Kock Hugo Werner. "Position sensorless and optimal torque control of reluctance and permanent magnet synchronous machines." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1314.
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Thesis (PhD (Electric and Electronic Engineering))--University of Stellenbosch, 2009.<br>Keywords: position sensorless control, torque control, synchronous machines
The work in this thesis deals with energy e cient torque control and rotor position estimation
in the full speed range, for a family of synchronous machines that should be used more often
in the near future. This family consists of the permanent magnet synchronous machine
(PMSM), the reluctance synchronous machine (RSM), the interior-PMSM and the PMassisted-
RSM.
By designing and controlling these synchronous machines correctly, better performance and
higher energy e ciency can be expected compared to the performance and e ciency of an
industry standard induction machine. However, applications are limited to variable speed
drives (VSD) in a certain power range, e.g. below 100kW. With the growing concern and
necessity of a better utilization of energy, it is becoming standard to use electronically
controlled power converters between the electricity grid and electrical machines. Therefore,
there is a very large scope for the implementation of this synchronous machine technology.
For traction applications like electrical vehicles, the optimally controlled synchronous machine
technology has a very strong position. Very compact and robust synchronous machines
with a very high power density can be designed that may out-perform the induction machine
by far. However, one major requirement for most applications is position sensorless control,
i.e. rotor position estimation in the whole speed range.
To achieve energy e cient torque control, maximum torque per Ampere (MTPA) control
should be implemented. It is possible to achieve MTPA control at low speed, but above the
rated speed of the machine, eld weakening needs to be performed. The question is how to
implement MTPA and e ective eld weakening for any value of speed and DC bus voltage
and for any machine within this family of synchronous machines. In this thesis a method is
explained to achieve this goal using results from nite element (FE) analysis directly. The
scheme may be implemented within a very short period of time.
The contribution of this thesis is a general understanding of the problems at hand, with
an in-depth view into the mathematical representation of synchronous machines, a generic
method of energy e cient torque control and a thorough study of rotor position and speed
estimation methods.
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Kumar, Jha Amit. "Optimization of Line Start Permanent Magnet Synchronous Motor for Magnet Cost Reduction." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124550.
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In this thesis different methods of optimizing line start permanent magnet motor (LSPM) for magnet cost reduction is studied. Influence of different parameters has been studied by simulating magneto-static and transient FEM models of the machine. Finally a motor design of a LSPM with high rotor saliency has been proposed. The first method investigated is the use of flux barriers in LSPM and its effect on the magnetic flux leakage. The flux barriers reduce the flux leakage and hence help in reducing magnet volume. The second method studied is the use of two different grades of magnets. Using low price magnets help in reducing the total magnet cost without reducing the air gap flux density. The reduction in NdFeB magnet volume is not substantial by using both the methods mentioned above. The third method investigated is increasing the saliency of the rotor by introducing flux barriers and reducing the corresponding magnet volume. Both the magneto static and transient models are used to study the effect of different parameters of the motor. The placement and volume of magnet plays a critical role in motor performance. At first, the developed reluctance torque of the motor is maximized by doing parametric study and then magnets are placed in slots to achieve the required efficiency and power factor. The motor is simulated with NdFeB magnets and with Ferrite magnets. It has been found that using high saliency LSPM motor the NdFeB magnet volume can be reduced significantly. It is also shown that the same performance of motor (as compared to the motor with NdFeB magnets) can be achieved by using Ferrite magnets. The volume of Ferrite magnet required will be larger but still cost-wise using Ferrite is an attractive choice. Therefore, a design of motor is proposed using both NdFeB magnets and Ferrite magnets. Finally, the performance of proposed LSPM motor with high saliency is compared with that of an induction motor.
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Niazi, Peyman. "Permanent magnet assisted synchronous reluctance motor, design and performance improvement." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3178.
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Recently, permanent magnet assisted (PMa)-synchronous reluctance motors
(SynRM) have been considered as a possible alternative motor drive for high
performance applications. In order to have an efficient motor drive, performing of three
steps in design of the overall drive is not avoidable. These steps are design optimization
of the motor, identification of the motor parameter and implementation of an advanced
control system to ensure optimum operation.
Therefore, this dissertation first deals with the design optimization of the Permanent
Magnet Assisted Synchronous Reluctance Motor (PMa-SynRM). Various key points in
the rotor design of a low cost PMa-SynRM are introduced and their effects are studied.
Finite element approach has been utilized to show the effects of these parameters on the
developed average electromagnetic torque and the total d-q inductances. As it can be
inferred from the name of the motor, there are some permanent magnets mounted in the
rotor core. One of the features considered in the design of this motor is the
magnetization of the permanent magnets mounted in the rotor core using the stator
windings to reduce the manufacturing cost. At the next step, identification of the motor parameters is discussed. Variation of
motor parameters due to temperature and airgap flux has been reported in the literatures.
Use of off-line models for estimating the motor parameters is known as a
computationally intensive method, especially when the models include the effect of
cross saturation. Therefore in practical applications, on-line parameter estimation is
favored to achieve a high performance control system. In this dissertation, a simple
practical method for parameter estimation of the PMa-SynRM is introduced.
Last part of the dissertation presents one advanced control strategy which utilized the
introduced parameter estimator. A practical Maximum Torque Per Ampere (MTPA)
control scheme along with a simple parameter estimator for PMa-SynRM is introduced.
This method is capable of maintaining the MTPA condition and stays robust against the
variations of motor parameters.
Effectiveness of the motor design procedure and the control strategy is validated by
presenting simulation and experimental results of a 1.5 kW prototype PMa-SynRM,
designed and manufactured through the introduced design method.
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Sadri, Seyed Mohammad Reza. "Variable reluctance motor and drive systems /." View thesis, 1995. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030716.150935/index.html.
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De, Kock Hugo Werner. "Dynamic control of the permanent magnet assisted reluctance synchronous machine with constant current angle." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2062.
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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006.<br>This thesis is about the dynamic control of a permanent magnet assisted reluctance synchronous
machine (PMA RSM). The PMA RSM in this thesis is a 110 kW traction machine and is ideal for the
use in electrical rail vehicles. An application of the dynamic control of the PMA RSM in electrical rail
vehicles is to reduce wheel slip.
The mathematical model of the PMA RSM is derived and explained in physical terms. Two methods
of current control for the PMA RSM are investigated, namely constant field current control (CFCC)
and constant current angle control (CCAC). It is shown that CCAC is more appropriate for the PMA
RSM.
A current controller for the PMA RSM that guarantees stability is derived and given as an analytic
formula. This current controller can be used for any method of current control, i.e. CFCC or CCAC.
An accurate simulation model for the PMA RSM is obtained using results from finite element analysis
(FEA). The accurate model is used in a simulation to verify CCAC. A normal proportional integral
speed controller for the PMA RSM is designed and the design is also verified by simulation.
Practical implementation of the current and speed controllers is considered along with a general
description of the entire drive system. The operation of the resolver (for position measurement) is
given in detail. Important safety measures and the design of the electronic circuitry to give protection
are shown. Practical results concerning current and speed control are then shown.
To improve the dynamic performance of the PMA RSM, a load torque observer with compensation
current feedback is investigated. Two observer structures are considered, namely the reduced state
observer and the full state observer. The derivation of the full state observer and the detail designs of
the observer elements are given. The accurate simulation model of the PMA RSM is used to verify the
operation of the observer structures and to evaluate the dynamic performance. Both observer
structures are implemented practically and practical results are shown.
One method of position sensorless control, namely the high frequency voltage injection method, is
discussed in terms of the PMA RSM. This work is additional to the thesis but it is shown, because it
raises some interesting questions regarding the dynamic control of the PMA RSM.
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Poudel, Bikrant. "Line Start Permanent Magnet Synchronous Motor for Multi Speed Application." ScholarWorks@UNO, 2017. https://scholarworks.uno.edu/td/2430.
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This thesis aims to design and develop LSPM motors capable of operating in two distant synchronous speeds with good starting torque and steady state characteristics for variety of industrial applications, in particular offshore and maritime applications. The proposed designs are based on variable pole numbers for the stator and the rotor. The stator winding consist of two independent windings with different pole numbers to switch the winding and change the operating pole count for low and high speed applications. For the motor to operate in these two distinct operating speeds, the rotor must be capable of creating two different magnetic polarities (pole numbers) to adapt itself to the stator operating pole number. For this purpose, two different schemes for the rotor structure are proposed. In scheme I two-speed operation is realized by the combination of electromagnetic torque and reluctance torque which enables the motor to operate as a synchronous PM motor at high speed and synchronous reluctance motor at low speed. In scheme II, rotor with dual PM polarity is proposed which enables the motor to operate as a PM motor at both low and high speed regions.
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Arafat, AKM. "ANALYSIS AND CONTROL OF FIVE-PHASE PERMANENT MAGNET ASSISTED SYNCHRONOUS RELUCTANCE MOTOR DRIVE UNDER FAULTS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1524168102423576.
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Arafat, AKM. "Fault Tolerant Control of a Five-Phase Permanent Magnet Assisted Synchronous Reluctance Motor." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1449838071.
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Singh, Aditya Pratap. "Concept Population & Verification of Traction Motors." Thesis, KTH, Fordonsdynamik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302129.
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The electrification of automobiles has emerged as the sustainable powertrain solutionto meet United Nations sustainable development goals of sustainable cities andcommunities, affordable and clean energy, and climate action. The success of theelectrification depends on the efficiency of traction motors. Hence, the automobileindustry is dedicated to improving the performance of electrical traction machinesfor high performance and sustainability. The thesis aims to build various electricalmachine’s concept designs and quantify their behaviour on sustainability andperformance. The thesis objective is to design Permanent Magnet Synchronous Motor (PMSM),Synchronous Reluctance Motor (SynRM), and Permanent Magnet SynchronousReluctance Motor (PMSynRM). The thesis work comprises of accurate performanceestimation and optimisation of these electrical machines through a finite element based method. The inhouse scripts are developed to estimate the performance, electrical losses, and efficiency of these electrical machines through flexible open-source tools. The performance of PMSM with rare-earth magnet Neodymium Ferrite Boron(NdFeB) and without rare-earth magnet (ferrite) is done to evaluate the role of bothmagnets in producing torque density. The SynRM is evaluated and optimized usinggenetic algorithms in the thesis. The electrical machines are designed without the useof rare-earth magnets to eliminate the degradation of the environment and reduce thecost and weight of the motor.<br>The electrification of automobiles has emerged as the sustainable powertrain solutionto meet United Nations sustainable development goals of sustainable cities andcommunities, affordable and clean energy, and climate action. The success of theelectrification depends on the efficiency of traction motors. Hence, the automobileindustry is dedicated to improving the performance of electrical traction machinesfor high performance and sustainability. The thesis aims to build various electricalmachine’s concept designs and quantify their behaviour on sustainability andperformance. The thesis objective is to design Permanent Magnet Synchronous Motor (PMSM),Synchronous Reluctance Motor (SynRM), and Permanent Magnet SynchronousReluctance Motor (PMSynRM). The thesis work comprises of accurate performanceestimation and optimisation of these electrical machines through a finite element based method. The inhouse scripts are developed to estimate the performance, electrical losses, and efficiency of these electrical machines through flexible open-source tools. The performance of PMSM with rare-earth magnet Neodymium Ferrite Boron(NdFeB) and without rare-earth magnet (ferrite) is done to evaluate the role of bothmagnets in producing torque density. The SynRM is evaluated and optimized usinggenetic algorithms in the thesis. The electrical machines are designed without the useof rare-earth magnets to eliminate the degradation of the environment and reduce thecost and weight of the motor. Sammanfattning på svenska / Abstract in Swedish Elektrifieringen av bilar har framstått som en hållbar drivlinelösning för att mötaFörenade Nationernas hållbara utvecklingsmål för hållbara städer och samhällen, medprisvärda och rena energi och klimatåtgärder. Framgången med elektrifieringen berorpå effektivitet på motorer för framdrivningen. Därför är bilindustrin dedikerad tillatt förbättra prestanda för elmotorer för hållbarhet och hög prestanda. Avhandlingensyftar till att bygga olika konceptdesign för elmotorer för framdrivning och kvantifieraderas beteende på hållbarhet och prestanda. Uppsatsmålet är att utforma Permanent Magnet Synchronous Motor (PMSM),Synchronous Reluktance Motor (SynRM) och permanent magnetassisterad SynRM(PMSynRM). Examensarbetet består av noggrann prestationsuppskattning ochoptimering av dessa elektriska maskiner genom finit element metod (FEM). Deskripten för att hantera FEM för elektormagnetisk design är inhouse utveckladeför att uppskatta flexibelt prestanda, elektriska förluster och effektiviteten hos dessaelektriska maskiner genom att använda öppen källkod. Prestanda för PMSM med en sällsynta jordartsmagnet (NdFeB) och PMSM utansällsynta jordartsmagnet (ferrit) räknades fram för att utvärdera båda magneternasroll för att producera vridmomentdensitet. SynRM och PMSynRM maskinernautvärderas och optimeras med hjälp av genetiska algoritmer i avhandlingen.De studerade elektriska maskinerna är designad utan användning av sällsyntajordartsmagneter för att eliminera miljöförstöring och minska motorns kostnad ochvikt.
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Herbert, Joseph. "Thermal Analysis of a Permanent Magnet Assisted Synchronous Reluctance Motor Using Lumped Parameter Thermal Modeling." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1491313645053898.
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Islam, Md Zakirul. "Design and Performance Analysis of Rare-Earth-Free Five-Phase Permanent Magnet-Assisted Synchronous Reluctance Motor." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574423146588421.
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Ortega, Dulanto Adrian. "Design of a Synchronous Reluctance Motor Assisted with Permanent Magnets for Pump Applications." Thesis, KTH, Elektrisk energiomvandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163280.
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This Master thesis focuses on the design of a high efficiency Permanent-Magnet-Assisted Synchronous Reluctance Motor (PMASynRM) intended for pump applications. The new motor is designed to replace an existing Induction Motor (IM) in a pump product. The basic principles of SynRM, and PMASynRM Motors and a good analytical model were introduced. Due to the complexity and high non-linearity of this specific electrical machine, Finite Element Method (FEM) and an analytical model were combined. First, a parameter sensitivity analysis was carried out with the software SPEED. However, SPEED does not give appropriate results for the sensitivity analysis of the distance from the shaft to the first barrier, and in this case, the FEM software FLUX was used instead. Using FEM as well, the risk of demagnetization of the magnets was controlled for the nominal current and for overload conditions. Furthermore, some conclusions were drawn in terms of the losses, and efficiency for the selected design. The design fulfills the required efficiency placing either ferrite or neodymium iron bore magnets in the rotor barriers. However, if ferrite magnets are employed, the maximum current should be controlled to avoid demagnetization. Finally, a ferrite PMASynRM prototype was built and tested in the lab. The simulation results as well as the measurement of other possible technologies including IM and Line Start Permanent Magnets (LSPM) machine were compared with the measurements of the prototype in terms of efficiency, power factor and cost. It is concluded that the designed PMASynRM is a good alternative as it surpassed the required efficiency and the results from the simulation were close to the test measurements.<br>Detta examensarbete fokuserar på konstruktion av en högverkningsgradmotor av typen Permanent-Magnet-Assisterad Synkronreluktansmotor (PMASynRM) avsedd för pumpapplikationer. Syftet är att asynkronmotorn i befintliga pumpar ska bytas ut mot den nya konstruktionen. På grund av maskinens komplexitet och dess höga olinjäritet kombinerades Finite Element Modelling metoden (FEM) och en analytisk metod. Till en början genomfördes en parameterberoende analys med SPEED för att komma fram till hur modellens olika parametrar påverkar maskinens prestanda. FEM beräkning gav mer pålitligt resultat för parameterstudie när det gällde avståndet från axeln till den första barriären (jämför med SPEED). Detta val hade fördelen att man även kunde studera avmagnetiseringsrisken vid märkström samt undersöka vid vilken ström magneterna faktiskt avmagnetiserades. Därutöver drogs slutsatser om verkningsgrad, prestanda och förluster. PMASynRM uppfyller önskad verkningsgrad med ferrit eller neodymmagneter. Om ferritmagneter används bör den maximala strömmen kontrolleras för att undvika avmagnetisering. Till slut byggdes och testades en PMASynRM prototyp. Resultaten från simulationen samt mätningarna av andra möjliga teknologier, som asynkronmotor och nätstartande permanentmagnetiserad motor (LSPM), jämfördes med mätningarna av prototypen med avseende på verkningsgrad, effektfaktor och kostnad. Slutsatsen är att PMASynRM är ett bra alternativ eftersom den överträffade den önskade verkningsgraden och eftersom resultaten från simulationen låg mycket nära testmätningarna.
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Jahan, Israt. "Implementation and experimental evaluation of a parameterized PMSynRM model using Matlab and Comsol Multiphysics." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265782.
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This thesis focuses on modelling of the permanent magnet synchronous reluctancemotor (PMSynRM), which has drawn considerable attention by researchers thanks toits high efficiency and wide range of speed operation. Comparisons with measurementsfrom a four-pole PMSynRM with four barriers and 24 stator slots have been carriedout. In this thesis work, Matlab and Comsol Multiphysics are used to implement theparameterized PMSynRM model.Models of the PMSynRM in two-dimensions (2D) and three-dimensions (3D) havebeen implemented. The electromotive force (back emf) at no load condition for a fullpitchand short-pitch winding as well as the air-gap flux density distribution have beencalculated. A parametric study has been performed where the air-gap length, insulationratio of both d and q-axes, as well as flux barrier number have been varied and theeffect on the machine performance has been observed. The losses including eddycurrentlosses in permanent magnet, stator lamination loss, and rotor lamination losshave been calculated. The back emf and rated torque as well as developed torque witha pure q-axis current have been compared with corresponding experimental data.A 3D model of an axially shortened rotor has also been implemented in where apulsating current has been applied to estimate eddy-current losses in the permanentmagnets. The predicted losses from the 2D model and 3D model have been comparedfor pulsating currents with varying frequency and magnitude.<br>Denna avhandling fokuserar på modellering av permanentmagneten synkronreluktansmotor (PMSynRM), som har fäst stor uppmärksamhet av forskare tack varedess höga effektivitet och brett spektrum av hastigheter. Jämförelser med mätningarfrån en fyrpolig PMSynRM med fyra hinder och 24 statorspåren har utförts. I dettaexamensarbete, Matlab och Comsol Multi används för att implementera parameterPMSynRM modell. Modeller av PMSynRM i två dimensioner (2D) och tre dimensioner(3D) har genomförts. Den elektromotoriska kraften (mot-emk) utanbelastningstillstånd för en full-pitch och kort stigning lind samt luftgapetfördelningsflödestäthet har beräknats. En parametrisk studie har gjorts där luftspaltlängden,isolering förhållande av både d- och q-axlar, såväl somflödesbarriärnummer har varierats och effekten på maskinens prestanda harobserverats. Förlusterna inklusive virvelströmsförluster i permanentmagnet,statorskiktet förlust, och rotorlamine förlust har beräknats. Mot-emk och nominelltvridmoment samt utvecklat vridmoment med en ren q-axelström har jämförts medmotsvarande experimentella data. En 3D-modell av en axiellt förkortad rötor har ocksågenomförts i där en pulserande ström har tillämpats för att uppskattavirvelströmsförluster i permanentmagneterna. De förutsagda förluster från 2Dmodellenoch 3D-modell har jämförts för pulserande strömmar med varierandefrekvens och storlek.
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Devgan, S. K. "Permanent magnet synchronous motors." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235056.
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Arvidsson, Amanda. "Generic Control of Permanent Magnet Synchronous Motors." Thesis, Linköpings universitet, Fysik och elektroteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110898.
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López, Torres Carlos. "Analysis and implementation of a methodology for optimal PMa-SynRM design taking into account performances and reliability." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620779.
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Automotive applications focus to develop drive-train technologies with higher energy efficiency and lower environmental impact. Electric and hybrid vehicles are gaining popularity since they fulfill these requirements . The aim of optimal motor design is to achieve high torque and power densities, wider speed range and high efficiency within the area defining the most frequent operating points. This work presents a methodology to optimize electric motors for traction applications considering a multi-physics approach. The magnetic behavior is evaluated using a complex reluctance networks capable to compute the cross-coupling. The results of the magnetic model are the inductances, iron losses, and magnet flux linkage. The thermal behavior is evaluated using a thermal network and it is coupled with the magnetic model. The electric model is feed with the solution of the thermal and magnetic model. The electric model aims to calculate the whole operating area of the motor to allow optimizing the machine considering the most frequent operating zone. Therefore, a fast tool to evaluate different variables within the torque-speed map is convenient for this purpose. In this context, starting from a preliminary motor design, and taking into account motor cross-coupling effects and power losses, this thesis presents a new methodology for optimizing and evaluating the behavior of permanent magnet machines, such as synchronous reluctance machines, and permanent magnet assisted synchronous reluctance machines, in all operational points. Apart from the torque and efficiency, many other electrical variables can be obtained, such as the current space vector angle, power factor or electrical power among others. The proposed methodology also allows optimizing the design of the machine under a preestablished control law; thus obtaining the current set point trajectory in the dq frame and allowing a fast and accurate evaluation of motor performance.The results obtained by means of the proposed simulation tool are compared against finite element analysis simulations and experimental data, thus validating the usefulness and accuracy of the proposed methodology.<br>El sector de la automoción se está centrando en las tecnologías con alta eficiencia y un bajo impacto medioambiental. En este sentido el desarrollo de vehiculos eléctricos o hibridos está ganando importancia en este sector. Por lo tanto, el diseño de motores eléctricos que cumplan las especificaciones necesarias para aplicaciones de tracción eléctrica es un punto de especial interés . El principal objetivo en la optimización de motores eléctricos es conseguir altas densidades de par o potencia, alta eficiencia y un buen factor de potencia, teniendo en cuenta la zona de trabajo más común. Este trabajo presenta una metodologia para optimización de motores eléctricos, concretamente motores de reluctancia síncrona, para aplicaciones de tracción eléctrica. Para ello es necesario crear diferentes modelos para evaluar el comportamiento eléctrico, térmico y magnético del motor así como calcular los diferentes puntos de trabajo. El modelo magnético, que está basado en redes de reluctancia, permite calcular las inductancias, el flujo magnético del imán y las pérdidas en el hierro teniendo en cuenta la saturación cruzada. El modelo térmico estará basado en redes térmicas y permite evaluar la temperatura de diferentes partes del motor (dientes, bobinado, cabezas de bobina o imanes) para evaluar la viabilidad de estos motores y definir bien el valor de algunos parámetros como la resistencia del bobinado y las propiedades magnéticas del imán. El modelo eléctrico está basado en la resolución de las ecuaciones completas del motor en los ejes dq, los parámetros necesarios (inductancias, resistencia, perdidas en el hierro, flujo del imán) serán obtenidos en los modelos magnético y térmico. En este punto, la metodología propuesta es capaz de calcular todos los puntos de operación de la máquina. Hay que remarcar que en este punto se puede calcular la eficiencia, factor de potencia, ángulo de corriente. La tesis propuesta empezará el proceso diseño optimizado del motor calculando un pre-diseño para introducirlo en un optimizador que usará los mapas calculados para evaluar su función de coste teniendo en cuenta que estos mapas estarán obtenidos considerando saturación cruzada, perdidas en el hierro y variaciones de temperatura, se puede afirmar que el motor resultante está evaluado en todos sus dominios exceptuando el mecánico. Para el análisis mecánico se propone un estudio en elementos finitos posterior a la optimización. En este análisis se podrán introducir estructuras que mejoren la resistencia mecánica del motor y que serán restricciones para una nueva optimización. Una vez cerrado el proceso iterativo entre optimización y análisis mecánico se tendria el motor final. En la tesis propuesta se usa esta metodologia para diseñar varios motores, con lo cual se permite la validación de la misma.
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Sooriyakumar, Gunaratnam. "Efficient design methodology for permanent magnet synchronous motors." Thesis, University of East London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532988.
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Alhassan, Muhtar Hanif. "Permanent magnet synchronous motors in position control systems." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333398.
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Milanfar, Peyman. "Failure monitoring in small permanent-magnet synchronous motors." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/17270.
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Karacan, Cuneyt. "Comparison Of Performance Of Switched Reluctance Motors, Induction Motors And Permanent Magnet Dc Motors." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604925/index.pdf.
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Since most of the electrical energy is consumed by the electrical motors, it is necessary to use the electrical energy as efficient as possible.
Throughout this study four different types of motors (induction motor, permanent magnet radial flux DC motor, permanent magnet axial flux DC motor, switched reluctance motor) are considered and compared based on their torque per unit volume and speed performance comparison. Torque per unit volume equations are obtained for each of the motor, related to quantities such as magnetic flux density and electric loading and the speed performances are compared by using a washing machine application, which has a wide speed range.
As a result of this study torque per unit volume and speed performance of each of these four types of motors are obtained and motors of different types are evaluated due to their torque per motor volume, torque per ampere, efficiency and etc. over a wide speed range to have an idea about the applications of these motors.
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Mi, Chunting. "Modelling of iron losses of permanent magnet synchronous motors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58959.pdf.
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Apostolopoulos, Nikolaos. "Design and implementation of an SPB converter for fault tolerant PMSynRel motor control." Thesis, KTH, Elektrisk energiomvandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-179141.
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The stacked polyphase bridges (SPB) converter topology is investigated in the presentthesis as a fault-tolerant choice for permanent-magnet synchronous reluctance (PMSyn-Rel) motor control. Integrated motor drive systems are studied as they offer great benefitsfor propulsion applications. Moreover, the importance of a modular topology, like theSPB, for an electric powertrain is discussed. The latter consists of a number of seriesconnected, 3-phase 2-level inverter submodules that supply separate sets of windings ina multi-star motor. The specifications of building a four-board SPB setup are examined,while the challenges of an active voltage balancing controller are analyzed. The designprocess is explained step-by-step and the final printed circuit boards (PCBs) are presented.Furthermore, the significance of low electromagnetic interference design for a converterthat requires high speed communication is highlighted. Finally, the prototype is testedthoroughly and the expected fault-tolerant capabilities are validated on a PMSynRel motor.<br>I detta examensarbete unders¨ok SPB-omriktartopologin (stacked polyphase bridges converter)i termer av ett feltolerant elektriskt drivsystem f¨or en permamentmagnetassisteradsynkron reluktansmaskin (PMSynRel). SPB-omriktaren best°ar av ett antal seriekoppladetrefasomriktare av tv°aniv°atyp som, var och en, f¨orser effekt till en trefaslindningtillh¨orande en modul¨ar elmaskin av multifastyp. Specifikation, design och konstruktion aven SPB-omriktare med fyra seriekopplade moduler studeras. Designproceduren presenterasi en steg-f¨or-steg-process och de tillverkade kretskorten presenteras utf¨orligt. Kommunikationenmellan de olika kretskorten unders¨oks med s¨arskild tonvikt p°a l°ag elektromagnetiskinterferens vilket ¨ar n¨odv¨andigt om h¨og kommunikationshastighet skall kunnauppn°as. Den f¨ardigst¨allda prototypen har utv¨arderats experimentellt och kapaciteten f¨orfeltolerans har demonstrerats vid drift av en PMSynRel-maskin utrustad med en multifaslindning.
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Urresty, Betancourt Julio César. "Electrical and magnetic faults diagnosis in permanent magnet synchronous motors." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/101505.
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Permanent magnet synchronous motors (PMSMs) are an alternative in critical applications where high-speed operation,
compactness and high efficiency are required. In these applications it is highly desired to dispose of an on-line, reliable and
cost-effective fault diagnosis method. Fault prediction and diagnosis allows increasing electric machines performance and
raising their lifespan, thus reducing maintenance costs, while ensuring optimum reliability, safe operation and timely
maintenance. Consequently this thesis is dedicated to the diagnosis of magnetic and electrical faults in PMSMs.
As a first step, the behavior of a healthy machine is studied, and with this aim a new 2D finite element method (FEM) modelbased
system for analyzing surface-mounted PSMSs with skewed rotor magnets is proposed. It is based on generating a
geometric equivalent non-skewed permanent magnet distribution which accounts for the skewed distribution of the practical
rotor, thus avoiding 3D geometries and greatly reducing the computational burden of the problem.
To diagnose demagnetization faults, this thesis proposes an on-line methodology based on monitoring the zero-sequence
voltage component (ZSVC). Attributes of the proposed method include simplicity, very low computational burden and high
sensibility when compared with the well known stator currents analysis method. A simple expression of the ZSVC is
deduced, which can be used as a fault indicator parameter. Furthermore, mechanical effects arising from demagnetization
faults are studied. These effects are analyzed by means of FEM simulations and experimental tests based on direct
measurements of the shaft trajectory through self-mixing interferometry. For that purpose two perpendicular laser diodes are
used to measure displacements in both X and Y axes. Laser measurements proved that demagnetization faults may induce
a quantifiable deviation of the rotor trajectory.
In the case of electrical faults, this thesis studies the effects of resistive unbalance and stator winding inter-turn short-circuits
in PMSMs and compares two methods for detecting and discriminating both faults. These methods are based on monitoring
and analyzing the third harmonic component of the stator currents and the first harmonic of the ZSVC.
Finally, the Vold-Kalman filtering order tracking algorithm is introduced and applied to extract selected harmonics related to
magnetic and electrical faults when the machine operates under variable speed and different load levels. Furthermore,
different fault indicators are proposed and their behavior is validated by means of experimental data. Both simulation and
experimental results show the potential of the proposed methods to provide helpful and reliable data to carry out a
simultaneous diagnosis of resistive unbalance and stator winding inter-turn faults.
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Mevey, James Robert. "Sensorless field oriented control of brushless permanent magnet synchronous motors." Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1507.
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Cignali, Giovanni <1981>. "Nonlinear Observers for Sensorless Control of Permanent Magnet Synchronous Motors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5585/.
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In this thesis, the industrial application of control a Permanent Magnet Synchronous Motor in a sensorless configuration has been faced, and in particular the task of estimating the unknown “parameters” necessary for the application of standard motor control algorithms. In literature several techniques have been proposed to cope with this task, among them the technique based on model-based nonlinear observer has been followed.
The hypothesis of neglecting the mechanical dynamics from the motor model
has been applied due to practical and physical considerations, therefore only the electromagnetic dynamics has been used for the observers design.
First observer proposed is based on stator currents and Stator Flux dynamics described in a generic rotating reference frame. Stator flux dynamics are known apart their initial conditions which are estimated, with speed that is also unknown, through the use of the Adaptive Theory.
The second observer proposed is based on stator currents and Rotor Flux dynamics described in a self-aligning reference frame.
Rotor flux dynamics are described in the stationary reference frame exploiting polar coordinates instead of classical Cartesian coordinates, by means the estimation of amplitude and speed of the rotor flux. The stability proof is derived in a Singular Perturbation Framework, which allows
for the use the current estimation errors as a measure of rotor flux estimation errors. The stability properties has been derived using a specific theory for systems with time scale separation, which guarantees a semi-global practical stability.
For the two observer ideal simulations and real simulations have been performed to prove the effectiveness of the observers proposed, real simulations on which the effects of the Inverter nonlinearities have been introduced, showing the already known problems of the model-based observers for low speed applications.
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Lennartsson, Alexander, and Martina Blomberg. "Fault Detection in Permanent Magnet Synchronous Motors using Machine Learning." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-84909.
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In the aviation industry, safety and robustness are the number one priorities, which is why they use well-tested systems such as hydraulic actuators. However, drawbacks such as high weight and maintenance have pushed the industry toward newer, electrical, actuators that are more efficient and lighter. Electrical actuators, on the other hand, have some reliability issues. In particular, short circuits in the stator windings of Permanent-Magnet SynchronousMotors (PMSMs), referred to as Inter-Turn Short Faults (ITSFs), are the dominating faults, and is the focus of this thesis. ITSFs are usually challenging to detect and often do not become noticeable until the fault has propagated, and the motor is on the verge of being destroyed. This thesis investigates the possibility of detecting ITSFs in a PMSM, at an early stage when only one turn is shorted. The method is limited to finding the faults using ML algorithms. Both an experiential PMSM and a simulated model of the experimental PMSM, with the ability to induce an ITSF, were used to collect the data. Several Machine Learning (ML) models were developed, and then trained and tested with the collected data. The results show that four of the tested ML models, being: Random Forest, Gaussian SVM, KNN, and the CNN, all achieve an accuracy exceeding 95%, and that the fault can be found at an early stage in a PMSM with three coils connected in parallel in each phase. The results also show that the ML models are able to identify the ITSF when the simulated data is downsampled to the same frequency as the experimental data. We conclude that the ML models, provided in this study, can be used to detect an ITSF in a simulated PMSM, at an early stage when only one turn is shorted, and that there is great potential for them to detect ITSFs in a physical motor as well.
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Uddin, Mohammad Nasir. "Intelligent control of an interior permanent magnet synchronous motor drive." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0021/NQ55128.pdf.
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Dema, Kleita. "Sensorless Control of Inner Permanent Magnet Synchronous Motor." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
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In this thesis, a speed observer is implemented to estimate the position and the speed of an IPMSM by injecting a voltage signal at high frequency. The fundamental principle is to track the position error through a PLL loop, instead of aiming to estimating the actual position. Several simulations are carried out to assess the performance of the control system to parameter variations. The stability and the robustness of the control system is proved at different speeds.
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Deák, Csaba Zsolt [Verfasser]. "Modular Permanent-Magnet Synchronous Motors with high Electromagnetic Utilization / Csaba Zsolt Deák." Aachen : Shaker, 2012. http://d-nb.info/1069046175/34.
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Saavedra, Ordóñez Harold. "Analysis and design of fault tolerant axial flux permanent magnet synchronous motors." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/286323.
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Electric vehicles (EVs) are attractive comparted to internal combustion engine powered vehicles due to several benefits, including low emissions, higher efficiency, less maintenance costs, stronger acceleration or lower fuel price, among others. EVs require traction motors with especial features, including high efficiency, high power and torque density, compactness, precise torque control, extended speed range. This work focuses on the analysis and optimal electromagnetic design of fault tolerant permanent magnet synchronous motors. The study is mainly based on the research of analytical design procedures and the effect of electrical faults in the motor behavior, according to the configurations of each machine. The study will be developed by using analytical tools, and validated by applying 2-D and 3-D finite element methods (FEM). A brief study about the main achievements regarding the design of fault tolerant machines is made, identifying the possible improvements and main rules of design in this kind of machines. Then a study focused on the requirements of a fault tolerant design is made, in order to select the appropriate motor configuration. Since the consequences of inter-turn faults can be catastrophic in PMSMs, chapter 3 studies the influence of the winding configuration on the detection of such faults. This detection is based on the analysis of the stator currents and the (zero-sequence voltage component) ZSVC spectra. Several types of winding configurations are selected for analysis i.e. fractional- and integral-slot windings, overlapping- and non-overlappingwindings, single- and double-layer, full- and short-pitch, constant- and variable-pitch windings. Taking into the fault tolerant tendencies about the redundancy of the system, the study of the effect of inter turn fault is extended to the five phase machine, thus a parametric model of the five-phase PMSM is developed, this model accounts for the effects of inter-turn faults. This parametric model is used to select the harmonic frequencies to be studied to detect such faults. Likewise, the amplitudes of these harmonic frequencies are further analyzed by means of FEM simulations, therefore showing the potential of the proposed system to detect inter-turn faults in their early stage, which is a desirable characteristic for a fault tolerant system. The demagnetization effect on AFPMM torque is also analyzed. The main objective was to study the influence of the magnet shape in the performance of an AFPMM working under faulty condition, in order to select the most suitable type of magnet for the design of a fault tolerant machine. After an exhaustive analysis of the main electromagnetic faults on PMSMs, the work is focused on the optimal electromagnetic design of an AFPMM. The optimal design is based on a set of analytical equations whose accuracy is validated by means of FEM simulations. Next, to find the optimal solution, the huge set of possible motor solutions is explored by means of computationally efficient optimization algorithms leading to an optimum solution while minimizing the computational burden. The set of analytical equations are solved to obtain the geometrical, electric and mechanical parameters of the optimized AFPMM and several design restrictions are applied to ensure fault tolerance capability, along with the recommended features that have been drawn from the fault analysis study. Finally, a dual outer rotor AFPMM with NN configuration for automotive applications is optimized by applying accurate analytical sizing equations and
taking into account fault tolerant constraints. For optimization purpose, a multi-objective design strategy is applied, in which the optimization variables are the motor efficiency and power density and ten input geometric and electric parameters are considered, with their respective bounds and constraints. At last the model is verified by applying 3D-FEM simulations and the main performance characteristics are compared.<br>Debido a las nuevas políticas de conservación medio ambiental, los vehículos eléctricos toman una posición más importante en la sociedad actual. Los motores eléctricos constituyen el corazón de la cadena de tracción de un EV, por esta razón se debe encaminar la investigación hacia el diseño de motores de mayor eficiencia y fiabilidad. Este trabajo se enfoca en el análisis y diseño óptimo de un motor de flujo axial con tolerancia a fallos. Como base, se parte de la investigación de los procedimientos analíticos de diseño de motores eléctricos y del estudio de los efectos de los fallos eléctricos en el comportamiento de estos, de acuerdo a la configuración específica de cada máquina. Para desarrollar esta tesis se hará uso de herramientas analíticas y de métodos de simulación basados en métodos finitos (FEM). En primera parte se hace un estudio del estado del arte del diseño de motores eléctricos tolerantes a fallos, en el cual se identifican las posibles configuraciones a usar y las principales reglas de diseño de estos motores. Debido a que las consecuencias de un cortocircuito entre espiras pueden ser catastróficas para el motor de imanes permanentes, en el siguiente capítulo se analiza su efecto en dependencia de la configuración de los devanados del motor, además de su posible detección. La detección del cortocircuito se basa en el análisis del espectro de frecuencias de las corrientes del estator y la componente homopolar de voltaje (ZSVC). Para este estudio se seleccionan los 5 tipos de bobinados generalmente usados en motores eléctricos. Tomando en cuenta las tendencias de sistemas tolerantes a fallos de utilizar la redundancia de elementos, el estudio del cortocircuito se extiende al motor de 5 fases, para esto se desarrolla un modelo paramétrico del motor, el cual es utilizado para seleccionar los armónicos de frecuencias que permitan la detección del cortocircuito entre espiras en su fase más temprana. De la misma manera estos armónicos son analizados en modelos de simulación por elementos finitos, probando su potencial para el desarrollo de algoritmo de detección de fallos, característica deseable en los sistemas tolerantes a fallos. En última parte de este capítulo se estudia el efecto de la desmagnetización en el comportamiento de motores, en particular la influencia de la forma de los imanes cuando el motor funciona en régimen de fallo, como conclusión de este estudio se selecciona la forma de imán que mejor se comporta ante este tipo de fallos. Una vez analizado los posibles fallos eléctricos en el motor, el trabajo se centra en el diseño electromagnético óptimo de una máquina de flujo axial. El diseño optimo se apoya en el uso de ecuaciones analíticas del motor (AFPMM) y se valida por medio de simulaciones FEM. Para lograr el diseño óptimo de hace uso de algoritmo de optimización heurísticos, en particular los algoritmos genéticos. A estos algoritmos se les aplica las restricciones anteriormente encontradas en los estudios de fallos y en el estado de arte de motores tolerantes a fallos. Finalmente aplicando una serie de ecuaciones analíticas y teniendo en cuenta las restricciones de un diseño tolerante a fallos previamente seleccionadas se obtiene el diseño electromagnético óptimo de un motor de flujo axial tolerante a fallos. Para el proceso de optimización se utilizan algoritmos genéticos multi-objetivos en donde se busca maximizar la densidad de potencia y la eficiencia. Por último, el modelo del motor pentafásico de flujo axial es verificado por medio de simulaciones en elementos finitos.
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Al, azze Qasim. "Field-Oriented Control of Permanent Magnet Synchronous Motors Based on DSP Controller." Thesis, Southern Illinois University at Edwardsville, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1557741.
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<p> Permanent Magnet Synchronous Motor is widely used in appliances, robots, hybrid electric vehicle, and many other motor applications. permanent magnet synchronous motor has a small size, high efficiency and high performance. Field–Oriented control is a efficiently used method to control the torque as well the speed of permanent magnet synchronous motor. This paper presents a mathematical model of permanent magnet synchronous motor, which is multipole stator winding with constant excitation feeds from the permanent magnet which is mounted on the rotor. Only surface permanent magnet synchronous motor is considers in this paper.</p><p> Power switching electronic is used to generate the desired voltage/current from DC source. Pulse Width Modulation technique controls the switching power electronic by creating a control signals which are applied to their gates. The whole circuit of the inverter based on space vector pulse width modulation is simulated in MatLab, Simulation and its results are presented.</p><p> Field–Oriented Control, or vector control, is implemented via Digital Signal Processors to control permanent magnet synchronous motor. Clarke and Park transformations are applied to “abc” coordinate frame of permanent magnet synchronous motor model to get the “qd” coordinate frame that is used in field oriented control technique. Hence, the developed torque and the magnetizing the flux component are controlled separately. Since the rotor angle is required for Park transformation, field oriented control is classified into two types; indirect, or called sonsorless, and direct, or called sorsonsored, method. In this paper is only sonsored FOC is presented. PI controller is used to control the motor speed and torque. PI controllers are design using frequency response method and symmetric optimum method. The whole system is simulated based on the mathematical model of PMSM and field–oriented control method with designed PI controllers. Simulation results show the PMSM have a perfect dynamic response.</p><p> Digital signal processors is a high speed processor which can implement the field oriented control algorithms and compute the parameter in real time. A Texas Instruments kits and software are used to implement field-oriented control of permanent magnet synchronous motor. The paper includes a short review of DSP controller. Implementation of field–oriented control of permanent magnet synchronous motor shows that motor has satisfactory response in terms of torque ripple and speed response.</p>
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Treharne, William. "The optimal application of common control techniques to permanent magnet synchronous motors." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:e8e2902a-d383-400f-9be0-bb3c11b3899c.
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Permanent magnet synchronous motors are finding ever increasing use in hybrid and electric vehicles. This thesis develops a new control strategy for Permanent Magnet Synchronous Motors (PMSMs) to reduce the motor and inverter losses compared to conventional control techniques. The strategy utilises three common control modes for PMSMs; brushless DC with 120°E conduction, brushless DC with 180°E conduction, and brushless AC control. The torque and power output for each control mode is determined for an example motor system using a three phase axial flux YASA motor and an IGBT inverter. The loss components for the motor and inverter are also estimated using a combination of analytical and simulation techniques and results are then validated against experimental measurements. Efficiency maps for each control mode have been used to determine an optimal mode utilisation strategy, which minimises the total system losses and maximises the available motor torque output. The proposed control strategy switches between the three control modes without interruption of motor torque to maximise the system efficiency for the instantaneous operating speed and demanded torque output. The benefits of the new strategy are demonstrated using an example vehicle over a simulated drive cycle. This yields a 10% reduction in losses compared to conventional brushless AC control.
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Jayasoma, Sujitha. "An advanced drive system for permanent magnet synchronous motors using field programmable." Thesis, University of East London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532536.
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This research is concerned with the evolution of an advanced drive system for use with permanent magnet synchronous motors. The proposed drive system incorporates state-of-the art control strategies with a switching matrix current loop which is a special case of the sliding mode control loop, implemented using field programmable gate array (FPGA) devices. This significantly increases the bandwidth of the current control loop, in comparison with systems using PI current controllers and therefore improves the dynamic performance of the drive system. The hard-wired FPGA implementation of a current control loop greatly reduces the processing and computational burden imposed on the controller. Most importanUy, in contrast to the OSP technology, independent functions may be implemented without the constraint of a shared arithmetic unit. In this research a novel hard-wired algorithm implementation is proposed for advanced control of brushless permanent magnet synchronous motor (PMSM) servo-drives. The PM servomotor control system has been developed as a set of modular subsystems in the form of algorithms, which can be easily interconnected at the top-level. The novel features of the control system have been made possible by the FPGA implementation with the creation of special algorithms and multiple sampling periods. The application under study is the speed and position control of synchronous motor drives. Initially, a conventional proportional and integral (PI) speed controller was implemented to enable comparison of performance to be made with the forced dynamic control (FOC) law emerging during the final stage of the research programme, which takes advantage of the flexibility offered by digital FPGA implementation. This offers high robustness to uncertainties in the dynamics of the driven load and unknown external load torques and yields a prescribed closed-loop dynamic response to reference inputs. The proposed system not only has the prescribed mutual orthogonality between the magnetic flux and stator current vectors, but also the realisation of a chosen form of speed response transient These FOC strategies have not yet been commercially exploited and it is emphasised that the recent advances in FPGA technology render such control methods highly cost effective. It is therefore anticipated that the outcomes of the research work will provide significant benefits in the development of a new generation of high performance and competitive servo drives.
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Wang, Bo. "A triple redundant 3x3-phase fault tolerant permanent magnet synchronous reluctance machine drive." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/19803/.
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Fault tolerant machine drives are key enabling technologies for safety critical applications such as electric vehicle traction, and aerospace power generation, actuation and propulsion. High performance in healthy conditions and excellent fault tolerance against various faults are required for a fault tolerant drive, however, these two aspects usually conflict with each other. Thus, this PhD study aims to develop a fault tolerant machine drive which exhibits high performance and good fault tolerance, and can be realised in a simple and cost-effective manner. First, a novel triple redundant 3x3-phase permanent magnet assisted synchronous reluctance machine (PMA SynRM) with segregated windings is proposed. Its performance under healthy conditions and its ability to tolerate various faults with appropriate mitigation measures are investigated and assessed. Based on outcomes of the investigation, a 40kW machine is designed to tolerate all key electrical faults, including the worst single turn short circuit, and is optimised to maximise the efficiency in healthy conditions whilst satisfying the electrical, thermal and mechanical constraints. To analyse and realise a fault tolerant machine drive, fault modelling and fault detection techniques are essential. Thus, a general model is proposed based on the magneto-motive force (MMF) decomposition. The model is capable of predicting the machine behaviour in various operation modes, including the healthy condition, open circuit, short circuit and inter-turn short circuit fault with different number of turns and different coil locations. With the aid of the fault modelling technique, a turn fault detection technique is developed using the 2nd harmonics in the instantaneous reactive and active powers as fault indicators for motoring and generating modes, respectively. By cross-reference of the fault indicators of the three 3-phase sets, the technique can detect the turn fault during transient without false alarm. The optimised machine drive is constructed and the developed fault detection technique together with fault mitigation strategies is implemented in a DSP based controller. The performance of the drive under healthy conditions and its fault tolerant capability are validated by extensive tests. The accuracy of the fault modelling and the effectiveness of the detection technique are also experimentally evaluated. The test results demonstrate that the developed fault tolerant machine drive can be a competitive candidate for safety critical applications.
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Evans, Steven Andrew. "Design and optimization of a permanent magnet linear reluctance motor for reciprocating electro-mechanical systems." Thesis, Loughborough University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360798.
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Xian, Wei. "Development and test of a high temperature superconducting permanent magnet synchronous motor." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609701.
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Ofori-Tenkorang, John. "Permanent-magnet synchronous motors and associated power electronics for direct-drive vehicle propulsion." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10758.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.<br>Includes bibliographical references (p. 306-310).<br>by John Ofori-Tenkorang.<br>Ph.D.
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Ozturk, Salih Baris. "Direct torque control of permanent magnet synchronous motors with non-sinusoidal back-EMF." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2728.
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Rim, Geun-hie. "Variable speed constant frequency power conversion with permanent magnet synchronous and switched reluctance generators." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40015.
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Bonthu, Sai Sudheer Reddy. "Optimal Design and Comparative Analysis of Multi-Phase Permanent Magnet Assisted Synchronous Reluctance Machines." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1439393220.
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Khan, Kashif Saeed. "Design of a Permanent-Magnet Assisted Synchronous Reluctance Machine for a Plug-In Hybrid Electric Vehicle." Licentiate thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50595.
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Yang, Jian. "Prediction of the power losses of PWM inverter drives for permanent magnet synchronous motors." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06112009-063124/.
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Chen, You-Sheng, and 陳佑昇. "Design of Multi-phase Permanent-magnet Assisted Synchronous Reluctance Motors." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/97ce44.
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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>This thesis aims to analyze and design a multiphase permanent-magnet assisted synchronous reluctance motor. The motor has 48 slots and 8 poles. Dual three-phase winding with two sets of three-phase three-arm inverter as well as six-phase winding with six-phase inverter are designed to enhance system reliability. The innovative design of rotor magnet shape is proposed to increase the inductance ratio between quadrature as well as direct axis to yield both magnetic and reluctance torques.
The magnets in rotor are hollowed to form magnetic barriers. Non-rare earth permanent-magnets are then added in magnetic barriers to boost the above mentioned inductance ratio and reduce the low-frequency harmonic components of back electro-motive-force. The JMAG Designer software is used for magnetic circuit analysis. A practical multiphase permanent-magnet assisted synchronous reluctance motor is built. At the rated speed of 2000 rpm, experimental results show that for dual three-phase winding, the fundamental peak value of no-load voltage is 24.25 V with total harmonic distortion (THD) of 6.41%. The q– and d–axis inductances are 12.41 mH and 5.44 mH, respectively, yielding the inductance difference of 6.97 mH. Whereas, for six-phase winding, the fundamental peak no-load voltage is 25.21 V with THD of 12.04%. The associated q- and d-axis inductances are 10.92 mH and 5.52 mH, respectively, resulting in the inductance difference of 5.40 mH. Additionally, at the rated speed, the generated output power with the resistive load of 5 , for the dual three-phase winding is 214.33W, yielding an efficiency of 72.75%. While the six-phase winding under the same load generates 231.67W with efficiency of 74.25%. The feasibility of the proposed design is verified by the close agreement between analytic and experimental results.
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Luo, Ta-Yin, and 羅大殷. "Designs and Analyses of Permanent Magnet Assisted Synchronous Reluctance Motors." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/48976828248270285045.
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碩士<br>國立中山大學<br>電機工程學系研究所<br>104<br>The purpose of this research is to provide a systematic design of a low-cost and high performance Permanent-Magnet-Assisted Synchronous Reluctance Motor (PMA-SynRM) base on the stator of an existing commercial induction motor. The motor design process started from the rotor design optimization of the synchronous reluctance motor, then the proper placement and usage of magnets, and finally the structural design of the PMA-SynRM. The effects among different flux path designs in the rotor core, the magnets, and the unavoidable structural changes for the massive production consideration were all included. Finally, the PMA-SynRM prototype was built and tested in the laboratory, and the finite element analysis results were confirmed by the experimental measurements.
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Ting-Wei, Syu, and 許庭維. "Implementation of a Permanent Magnet-assisted Synchronous Reluctance Motor Drive." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/96267277112456304762.
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碩士<br>明志科技大學<br>電機工程系碩士班<br>103<br>This thesis studies the permanent magnet-assisted synchronous reluctance motor drive. Three layers of high-strength permanent magnets are installed on therotor, and by the permanent magnet as well as reluctance torques to provide rotating magnetic field. Because there exist stator windings only in the stator, cooling would be easier, torque ripple becomes less, and motor’s efficiency is higher. This thesis proposes a vector control method that can improve permanent-magnet synchronous motor’s torque ripples. Indirectly increase the electromagnetic torque and all system’s efficiency. The experimental results show that the motordrive system efficiency around 89% can be achieved when motor’s speed is 3000 rpm and the loading is 1.5Nm. In this thesis, fuzzy speed control is also applied such that a fast speed response can be obtained.
In this thesis the Programmable-System-on-Chip(PSoC5) is used as the control core, and the three-phase full-bridge power module (PS21265-AP) with peripheral hardware components produced by Mitsubishi's company are also adopted to implement the permanent magnet-assisted synchronous reluctance motor drive.
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Chakali, Anil K. "Sensorless Speed Control of Permanent Magnet-Assisted Synchronous Reluctance Motor (PMa-SynRM)." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7405.
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An interesting alternative for today's high efficiency variable speed drives is the Permanent Magnet-Assisted Synchronous Reluctance Motor drive, which belongs to the family of brushless synchronous AC motor drives. Generally, the reluctance torque of this motor is significant compared to the Permanent Magnet electrical torque. The advantage of increased reluctance torque is the decreased need of expensive permanent magnet (PM) material, which makes this solution thus cheaper than the respective permanent magnet motor. Also due to its synchronous operation, sensorless rotational control is possible along with higher power factor and better efficiency compared to the induction motor (IM).
Therefore, this thesis first deals with the implementation of a vector control strategy for speed control of the PMa-synRM motor that can be applied to a washing machine application. The machine is supplied by a current controlled voltage source PWM inverter to control the instantaneous stator currents which are decided by the reference speed.
Secondly, the thesis focuses on the sensorless speed operation of the PMa-SynRM to take advantage of the lower costs as well as increased system reliability which otherwise is not possible using the delicate speed or position sensors. The concept involves estimation of the rotor speed and/or position. There are several speed estimation techniques proposed by researchers and among them the observer based technique is proven and commonly used in the industry. The only requirements of the observer system are a very fast signal processor, specialized and optimized to perform complex mathematical calculations.
The feasibility and effectiveness of the control techniques are verified using the experimental results, implemented using the Texas Instruments TMS320F2812 eZDSP controller board and the overall motor drive system in the laboratory.
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Liu, Yu-Han, and 劉育涵. "Design of Dual Three-phase Permanent-magnet Assisted Synchronous Reluctance Motor Drives." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/c6rgtk.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>This thesis presents the design of dual three-phase permanent-magnet assisted synchronus reluctance motor (PMASRM) drives. Two three-phase inverters are both controlled by one digital signal processor, TMS320F28069. Linear hall-effect and current sensors are used to feed back rotor position, speed and motor currents. The maximum torque per ampere as well as speed and current closed-loop controls are proposed to set the quadrature- and direct-axis currents to promote system performance. In addition, the post-fault control is conducted by determining and disconnecting the faulty three-phase winding via the feedback currents. The reduced-load operation of the normal three-phase winding thus enhances the system reliability accordingly.
Matlab/Simulink is used to analyze the control system for dual three-phase PMASRM. The control strategy programmed by C language can reduce circuit components. The experimental results show that when the speed and the load are at 600 rpm and 6.60 N-m, respectively, the corresponding peak phase-currents of the dual three-phase windings are 9.40 A and 9.53 A, the magnetic torque is 2.76 N-m, reluctance torque is 3.89 N-m and system efficiency is 72.50%. Moreover, when the speed and the load are at 600 rpm and 3.4 N-m, respectively, the peak phase-current of the motor is 10.35 A as the faulted three-phase winding is disconnected, yielding the system efficiency of 72.66%. In short, the simulation and experimental results have verified the feasibility of the proposed system.
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Huang, Ko-Hsien, and 黃科憲. "Efficiency Improvement of Permanent-Magnet Synchronous Motors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/89769347439238327930.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>電機工程系<br>90<br>This thesis is concerned with efficiency improvement of permanent-magnet synchronous motors. The optimal armature current vector is proposed to reduce copper and iron losses. In order to decrease q-d axis current ripple, a compensator is designed to correct controller parameters. Furthermore, a minimal input power tracing technique, which is insensitive to motor parameters, is proposed to increase the stability of the system.
A digital control system for 150kW ac permanent-magnet synchronous motor is realized with digital signal processor (DSP TMS320F240). Experimental results indicate that the operation efficiency is increased from 91.39% to 92.49% for output power of 37kW by the proposed optimal armature current vector control method.
Keyword:efficiency improvement, optimal armature current vector, minimal input power tracing technique
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Huang, Ing-Feng, and 黃英峰. "NONLINEAR CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTORS." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/50219865012763528167.
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