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Dissertations / Theses on the topic 'PERMANENT MAGNET BRUSHLESS'

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Published: 11 September 2023

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1

Ng, Kong. "Electromagnetic losses in brushless permanent magnet machines." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.579745.

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2

Mantala, Chawanakorn. "Sensorless control of brushless permanent magnet motors." Thesis, University of Bolton, 2013. http://ubir.bolton.ac.uk/625/.

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In this thesis, a sensorless control method of permanent magnet synchronous machines (PMSMs), whose machine neutral points are accessible, for all speeds and at standstill is proposed, researched and developed. The sensorless method is called Direct Flux Control (DFC). The different voltages between a machine neutral point and an artificial neutral point are required for the DFC method. These voltages are used to extract flux linkage signals as voltage signals, which are necessary to approximate electrical rotor positions by manipulating the flux linkage signals. The DFC method is a continuous
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3

Ede, Jason David. "High-speed permanent magnet brushless DC motors." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719807.

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4

Evans, David. "Novel partitioned stator permanent magnet brushless machines." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8605/.

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5

Wiriyakitja, Wisaruda. "Winding current reconstruction of brushless permanent magnet motor." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ENS/09ensw798.pdf.

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Bibliography: leaves 101-102. The main objective of this thesis is to reconstruct the winding currents accurately by using the information of DC link current and the switching signals. Describes the advantages and disadvantages of the BLPM motor and presents a comparative study. Reports the current measurement techniques and related devices and then discusses the requirement of current sensors and their locations in detail. Explains the simulation program of the BLPM motor drive. Describes the experimental setup that is used to validate the simulation results. Provides the details of all possi
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6

Martin, Benjamin C. "Geometric Design Optimization of Brushless Permanent Magnet Motors." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/MartinBC2009.pdf.

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7

Atallah, Kais. "Iron losses in brushless permanent magnet DC machines." Thesis, University of Sheffield, 1993. http://etheses.whiterose.ac.uk/14941/.

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A closed-loop computer-controlled single-sheet test system has been developed to characterise lamination materials and to measure, the iron loss density under any specified flux density waveform. The system has been 'used to validate predictions from a recently developed theoretical model, for the calculation of the excess loss component associated with domaiQ wall movement, under flux density waveforms typical of those encountered in the stator core of brushless permanent magnet dc motors. In addition, an improved expression for the calculation of the iron loss density component, from measure
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8

Bentouati, Syham. "Permanent magnet brushless DC motors for low cost applications." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487427.

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9

Al-Hadithi, Khalid Salih Mohammad. "Mathematical modelling of permanent-magnet brushless DC motor drives." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/7302.

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Brushless dc motor drives have become increasingly popular, following recent developments in rare-earth permanent-magnet materials and the semiconductor devices used to control the stator input power and to sense the rotor position. They are now frequently used in applications such as flight control systems and robot actuators, and for drives which require high reliability, long life, little maintenance and a high torque-to-weight ratio. In many motor drives the presence of torque and speed ripples, especially at low speed, is extremely undesirable. The mathematical model developed in this the
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10

Shen, Yang. "Novel permanent magnet brushless machines having segmented Halbach array." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/3376/.

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Permanent magnet brushless machines having Halbach array exhibit a number of attractive features. Therefore, they have been increasingly applied to different market sectors, including aerospace, industrial, domestic, renewable, and healthcare, etc. The need of fast global optimization, cost-effective design, and physical understanding of the relationship between parameters and performance requires a powerful analytical model. This thesis develops a general analytical model which is capable of predicting the electromagnetic performance of slotted/slotless permanent magnet brushless machines wit
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11

Al-Ani, Mahir. "Switched flux permanent magnet brushless machines for electric vehicles." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8159/.

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This thesis investigates different topologies of switched flux permanent magnet (SFPM) machines and variable flux (VF) methods for high speed applications. Although several novel topologies of SFPM machines have been proposed and investigated recently, their torque-speed capability has not been studied systematically. Therefore, the torque-speed capability as well as the open circuit and electromagnetic performance of conventional SFPM machines with three different stator/rotor pole combinations, i.e. 12/10, 12/13 and 12/14, and three novel SFPM machine topologies, i.e. multi-tooth, E-core and
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12

da, Silva Helder Sá Alves. "Design for manufacture of brushless permanent magnet synchronous servomotors." Thesis, University of East London, 2014. http://roar.uel.ac.uk/4620/.

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This thesis presents research into the design of brushless permanent magnet (BPM) interior rotor synchronous servomotor for both performance and manufacturability. The investigation has been supported by experimental evidence gathered with the aid of two prototype servomotors, having the same frame sizes and stator stack lengths, designed by the author and manufactured by the sponsoring company, Control Techniques Dynamics (CTD) Ltd. One servomotor, upon which the research is focussed, has the relatively new segmented stator structure containing concentrated windings. The other servomotor has
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13

Budden, Alan Stephen. "Sensorless zero-speed position detection for brushless permanent magnet machines." Thesis, University of Bristol, 2006. http://hdl.handle.net/1983/05c6fe86-20a7-4a40-b39d-4f62d0c774a7.

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14

Wing, Mitchell 1968. "Analysis of an energy efficient permanent magnet brushless universal motor." Doctoral thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/9473.

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Bibliography: leaves 131-138.<br>The vast improvements made in the development of rare earth magnets, power electronics and micro-electronics over the last two decades can claim to be the major driving forces behind the rapid growth of permanent magnet (PM) brushless motor drives. The state of the art in PM motor technology is the PM universal motor, i.e. a combination of a PM synchronous and a PM brushless direct current (DC) motor. The PM universal motor has the capability to operate as a variable speed DC shunt motor with high torque at low speeds, and also as a synchronous motor at constan
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15

Britten, Mark David. "Torque Controlled Drive for Permanent Magnet Direct Current Brushless Motors." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/5252.

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This thesis describes the design and implementation of a simple variable speed drive (VSD) based on a brushless direct current (BLDC) machine and discrete logic circuits. A practical VSD was built, capable of operating a BLDC machine in two quadrants, motoring and regenerative braking. The intended applications are electric scooters and electric bicycles, where the recovered energy from braking extends the range of the vehicle. A conceptual four quadrant VSD, suitable for three and four wheelers requiring reverse operation, was designed and tested in simulation. Simplicity was emphasized in th
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16

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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17

Liu, Chunhua. "Design, analysis, control and application of permanent-magnet hybrid brushless machines." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42841665.

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18

Niu, Shuangxia. "Design, control and application of double-stator permanent magnet brushless machines." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42841677.

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19

Niu, Shuangxia, and 牛双霞. "Design, control and application of double-stator permanent magnet brushless machines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841677.

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20

Liu, Chunhua, and 劉春華. "Design, analysis, control and application of permanent-magnet hybrid brushless machines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841665.

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21

Yu, Chuang, and 余创. "Design, analysis and control of flux-mnemonic permanent magnet brushless machines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44769027.

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22

Braiwish, Nasser. "Design optimisation of brushless permanent magnet synchronous motor for electric vehicles." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/100265/.

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A novel new application of optimisation algorithm “Bess Algorithm” in the design of electric machine is presented in this thesis. The optimisation has the ability to perform global and local search and can be applied on constrained, unconstrained optimisation problem with multi-objective function, which all counted when consider optimisation algorithm for the design of electric machine. The searching procedure of the optimisation algorithm has been described in detailed. Furthermore, novel instructions and recommendation were implemented to tune the optimisation parameters, particularly for th
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23

Gangla, Vineeta. "Analytical methods for electromechanical forces and torque computation in brushless permanent magnet machines." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-12052009-020038/.

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24

Xia, Wei. "A new phase decoupling permanent magnet brushless DC motor and its control /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19667747.

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25

Othman, Md Nazri Bin. "Design and evaluation of high power density brushless DC permanent magnet machines." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/14530/.

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Permanent Magnet brushless DC motors are now competing with many other types of motors in the world industries application. However, for low and medium power applications, brushless DC motors are often the main option due to its recognized advantage such as having no commutator, more efficient, need less maintenance, smaller in size and can operate at higher speeds than conventional motors. The overall objective of this project is to produce an improved prototype BLDC motor with concentrated winding concept for an aircraft actuator application. Specifically, the aim is to extract the maximum p
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26

Mhango, Landson Manase Caron. "High power density, high speed, three phase brushless permanent magnet DC motor." Thesis, University of East London, 2010. http://roar.uel.ac.uk/2608/.

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This thesis describes a development of a high power density, high-speed 3-phase permanent magnet brushless dc motor developed specifically for use in aircraft and defence applications. The drive is essentially intended for low power, high-speed application and it incorporates an integral electronic controller. Special attention is paid to the geometry of the rotor assembly. The development of high power density permanent magnet machines has had several unsuccessful attempts by distinguished researchers. These past attempts made use of the concept of flux focusing technique which provides the a
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27

夏偉 and Wei Xia. "A new phase decoupling permanent magnet brushless DC motor and its control." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31235426.

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28

Li, Fuhua, and 李富华. "Design, analysis, control and application of permanent magnet brushless dual-memory machines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208621.

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Conventional PM machines have fixed PM excitation and can only perform flux-weakening by controlling the d-axis current. This current incurs the power dissipation and reduces the efficiency during flux-weakening operations. Memory machines change this situation by introducing the memory function, namely magnetizing or reversely magnetizing Al-Ni-Co PMs to change the air-gap flux density. This provides another new way to realizing flux-weakening. And the elimination of the flux-weakening d-axis current improves the overall efficiency. But the single-memory machines have lower power density due
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29

Brown, D. "The analysis and simulation of permanent magnet machines for brushless drive applications." Thesis, University of Bath, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.480528.

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30

Gong, Liming. "Carrier signal injection based sensorless control of permanent magnet brushless AC machines." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/2113/.

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This thesis is focused on the carrier signal injection based sensorless control of Permanent Magnet (PM) Brushless AC (BLAC) machines. Based on the machine saliency property, carrier signal injection based sensorless techniques have been well developed in the past decade. In order to provide the insight into machine saliency information, a simplified experimental procedure is presented to obtain the machine saliency distribution in the dq plane, including magnetic saturation and cross-saturation effects. Based on the measured machine saliency information, Sensorless Safety Operation Area (SSOA
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31

Wang, Kai. "Novel rotor shaping and stator winding of permanent magnet brushless AC machines." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/5092/.

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32

Yong, Wang. "A new polygonal-winding permanent magnet brushless DC motor drive for electric vehicles." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/HKUTO/record/B38628739.

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33

Wang, Yong, and 王勇. "A new polygonal-winding permanent magnet brushless DC motor drive for electric vehicles." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B38628739.

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34

Ahmed, Saeed Mohamed. "Investigations into the improvement of a single phase permanent magnet brushless DC motor." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10114.

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The work presented in this thesis is aimed at improving single phase permanent magnet brushless DC motors; including their operation, design, efficiency and smoothness. Three main areas were identified and researched for further improvement. As a precursor to this work, a detailed literature study related to each area is also presented. The first of these areas concentrates on the improvement of the open circuit torque for a single phase BLDC motor. The open circuit torque is not only due to the slot openings, but is also contributed by the uneven airgap which is conventionally used to solve s
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35

Goss, James. "The design of AC brushless permanent magnet motors for electric vehicle traction applications." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685970.

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Brushless permanent magnet machines are a preferred topology for electric vehicle traction due to their inherent high efficiencies and excellent power densities. Electric and hybrid vehicles are a rapidly growing sector in the global automotive industry due to concerns regarding man made climate change, pollution in urban areas and the rising and volatile cost of fossil fuels. This research thesis investigates the design of brushless permanent magnet motors for electric vehicle applications from a technical and commercial perspective. A set of computationally efficient techniques are presented
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36

Liu, Yong. "Direct torque control of permanent magnet brushless AC/DC drives with reduced torque ripple." Thesis, University of Sheffield, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.630444.

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37

Gan, Jinyun, and 干金云. "Design, analysis and control of multiphase flux regulated permanent magnet brushless DC motor drives." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245304.

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38

Salgues, Christophe Xavier. "Torque Control of a Permanent Magnet Brushless DC Machine for a Hybrid Electric Vehicle." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216920443.

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39

Abed, Wathiq. "Robust fault analysis for permanent magnet DC motor in safety critical applications." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3550.

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Robust fault analysis (FA) including the diagnosis of faults and predicting their level of severity is necessary to optimise maintenance and improve reliability of Aircraft. Early diagnosis of faults that might occur in the supervised process renders it possible to perform important preventative actions. The proposed diagnostic models were validated in two experimental tests. The first test concerned a single localised and generalised roller element bearing fault in a permanent magnet brushless DC (PMBLDC) motor. Rolling element bearing defect is one of the main reasons for breakdown in electr
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40

Ray, Subhasis. "Multi-objective optimization of an interior permanent magnet motor." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116021.

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In recent years, due to growing environmental awareness regarding global warming, green cars, such as hybrid electric vehicles, have gained a lot of importance. With the decreasing cost of rare earth magnets, brushless permanent magnet motors, such as the Interior Permanent Magnet Motor, have found usage as part of the traction drive system in these types of vehicles. As a design issue, building a motor with a performance curve that suits both city and highway driving has been treated in this thesis as a multi-objective problem; matching specific points of the torque-speed curve to the desired
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41

Tseng, Chih-Tang, and 曾智堂. "Sensorless Control of Brushless Permanent-Magnet Motors." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17868412774469163006.

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碩士<br>大葉大學<br>電機工程學系<br>98<br>In this paper, a brushless DC (BLDC) motor is studied. We propose the detecting phase back-EMF sensorless controller architecture. This architecture combines analog hybrid digital-control and a control technology without sensor on brushless DC motor. Design of BLDC motor control of sensorless IC, brushless DC motor control is implemented by using Microchip Company PIC16F877 single-chip. In this study, we integrate key technologies including sensorless control technology, motor control chip design and motor drive power modules. The stationary position of rotor is f
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42

Zhang, Zhengxin. "High Temperature, Buried Permanent Magnet, Brushless DC Motor." 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8507.

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A high temperature magnetic bearing system using high temperature permanent magnets from Electron Energy Corporation (EEC) is under development. The system consists of two radial bearings, one thrust bearing, two radial catcher bearings and one motor. The purpose of this research is to develop one of the critical components of the system, namely, the High Temperature Permanent Magnet motor. A novel High Temperature Permanent Magnet (HTPM) Brushless DC(BLDC) motor capable of operating at 1000 degrees F (538 degrees C) is designed. HTPMs developed at Electron Energy Corporation are buried into t
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43

Shih, Pink-Kun, and 施炳坤. "Implementation of a Brushless Permanent Magnet Motor Driver." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/89400703326571444453.

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碩士<br>逢甲大學<br>電機工程所<br>93<br>Abstract In this thesis, a permanent magnet synchronous motor drive system is implemented. Magnetic resistors rather then Hall elements are used for rotor position detection. The control is performed using DSP-TMS320LF2407. The prototype motor has been constructed using a 6-KW, AC220-V, 4800-rpm, 6-pole IPM motor. The test of the permanent magnet synchronous motor drive system are evaluated through experiments.
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44

Chen, Chang-Yen, and 陳衍璋. "Torque Ripple Control of Permanent Magnet Brushless Motor." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/22602954814945591352.

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碩士<br>國立臺北科技大學<br>電機與能源研究所<br>88<br>The objective of this thesis is to present the techniques for reducing the torque and speed ripples of a Permanent Magnet Synchronous Motor (PMSM) drive. The torque ripple of PMSM motor drive is reduced by using new switching tables which either invoking zero switching states or new switching states. Two new switching tables are presented in this thesis. The first one invokes zero switching states for inverter control and turns the conventional three-level control into five-level control in the torque control loop. The second approach divides the
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45

Xie, Yun-Xuan, and 謝允軒. "Development of a Inset Permanent Magnet Brushless Motor." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/34687545965623253258.

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碩士<br>國立高雄應用科技大學<br>機械與精密工程研究所<br>103<br>The purpose of this thesis is to develop an inset permanent magnet brushless motor using soft magnetic composite (SMC) material. The inset permanent magnet motor design can generate additional reluctance torque and further reduce the use of permanent magnets. This study develops motors made of two different magnetic materials, SMC materials and silicon steel. Because the SMC material with powder sintering technology, comparing to silicon steel, can reduce the manufacturing processes, it is especially suitable for small motors with complex structures.
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46

Shiu, Meng-Yuan, and 許孟原. "Design and Performance of Brushless Permanent Magnet Motors." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/qxz24z.

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碩士<br>逢甲大學<br>電機工程所<br>91<br>Abstract The first part of the thesis is to write a design program for brushless permanent magnet motors. Then the program is applied to design a surface mounted (SPM) and an interior permanent-magnet (IPM) synchronous motors with the same specifications. Finite element electromagnetic field analysis is conducted to predict the performance of the motors. Results show that SPM motors have larger values of air gap flux density, open-circuit voltage, cogging torque and average torque than IPM motors when they have the same magnet volume, and SPM motors have small
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47

Shieh, Hung-Cheng, and 謝鴻成. "Computer Aided Design of Brushless Permanent-Magnet Motor." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/31185175024690389277.

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碩士<br>國立海洋大學<br>電機工程學系<br>85<br>Brushless permanent-magnet motors have been found in a wide range of applications. There are many CAD(Computer Aided Design) software packagesdesigned for induction and synchronous machines, but only few ones forbrushless permanent-magnet motors. The main purpose of this thesis is to develop a personal computer (PC)based interactive and object-oriented program for aiding the design and analysis of brushless permanent-magnet motors. This program , named Brus
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48

Bhogineni, Satishbabu. "Sensorless control of permanent magnet brushless DC motors." Thesis, 2016. http://localhost:8080/xmlui/handle/12345678/7124.

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49

Chiu, Wen-Han, and 邱彣漢. "Defects Induced Vibration Reduction In Permanent Magnet Brushless Motor." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/3u2m2u.

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碩士<br>國立交通大學<br>電控工程研究所<br>101<br>In recent years, these is a growing emphasis on energy saving and carbon reduction, people start using electric motor for its power resources of vehicles and riding on those transport with a long time, the vehicle comfortableness is important, so this research study a important factor for these — Vibration. This research study on a three phase permanent magnet brushless motor apply to E-Bike, investigate the motor eccentricity and offset on hall sensors position induced vibration which are cause in production, the first one can improve by different motor
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50

Shou-LongYu and 余守龍. "Design and Realization of Permanent Magnet Brushless Starter Alternators." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/57090645878641983554.

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碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>98<br>In this study, the design concept of the permanent magnet brushless motor is based on the permanent starter alternators (PMSA) and uses direct drive to start Wankel engine. The rotor driven PMSA provides electrical power and is able to reduce the spaces, weights and the mechanical losses of the transitional DC brush motors and generators. The purposed PMSA uses high performance rare-earth magnet to increase the power density, reliability and efficiency and reduce the weights and the difficulty of the assembling. Since the degree of difficulty will incre
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