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Xu, Aidong. "Microprocessor controlled novel 4-quadrant DC-DC converter." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/19477.
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The thesis describes a novel 4-quadrant DC-DC converter, supplied by a 28V DC voltage source, with an output voltage which may be continuously varied between +180V and -180V DC. A prototype 1.2kW DC-DC converter was designed and built, with emphasis given to the optimization of both the converter size and efficiency. This was achieved by means of a computer-based simulation study, which determined the optimal switching frequency and the size of the inductors and capacitors while maintaining a high unit efficiency. Mos-Gated Bimos switches, which feature the advantages of both mosfets and bipolar transistors, were developed to achieve high switching speed during high power operation. A digital-controlled DC servo system based on a 16-bit Intel 8086 microprocessor was designed, to provide both motor speed and position control. Speed and position detection circuits and the structure and the interfacing arrangement of the microprocessor system were designed and constructed. Several control algorithms were developed, including PID Control Algorithm and Current-Limit Control Algorithm. Based on open loop transfer function of the system, derived through mathematical modelling using the State-Space Averaging Method, the constants for the control algorithms were obtained to meet the dynamic performance specified for the system. Computer simulation was carried out to assist with the design of the converter and the control system. It is expected that drives into which the novel converter is incorporated will find many applications in situations where accurate positional control is required, particularly in battery-operated DC-servo system, such as satellite system, robots and some military vehicles.
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Ashraf, Ali Junaid. "DC Motor Speed Control via Fuzzy / Pole Placement / PI Controller." Thesis, Högskolan Dalarna, Elektroteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5514.
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This report presents a new way of control engineering. Dc motor speed controlled by three controllers PID, pole placement and Fuzzy controller and discusses the advantages and disadvantages of each controller for different conditions under loaded and unloaded scenarios using software Matlab. The brushless series wound Dc motor is very popular in industrial application and control systems because of the high torque density, high efficiency and small size. First suitable equations are developed for DC motor. PID controller is developed and tuned in order to get faster step response. The simulation results of PID controller provide very good results and the controller is further tuned in order to decrease its overshoot error which is common in PID controllers. Further it is purposed that in industrial environment these controllers are better than others controllers as PID controllers are easy to tuned and cheap. Pole placement controller is the best example of control engineering. An addition of integrator reduced the noise disturbances in pole placement controller and this makes it a good choice for industrial applications. The fuzzy controller is introduce with a DC chopper to make the DC motor speed control smooth and almost no steady state error is observed. Another advantage is achieved in fuzzy controller that the simulations of three different controllers are compared and concluded from the results that Fuzzy controller outperforms to PID controller in terms of steady state error and smooth step response. While Pole placement controller have no comparison in terms of controls because designer can change the step response according to nature of control systems, so this controller provide wide range of control over a system. Poles location change the step response in a sense that if poles are near to origin then step response of motor is fast. Finally a GUI of these three controllers are developed which allow the user to select any controller and change its parameters according to the situation.
3
Xu, Ke. "An input-output approach to series DC motor speed control." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq47120.pdf.
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Mahmoud, M. El-S. "A microprocessor thyristor-controlled DC drive incorporating regenerative braking." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355222.
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Elkhomri, Othman. "DSP IMPLEMENTATION OF DC VOLTAGE REGULATION USING ADAPTIVE CONTROL FOR 200 KW 62000 RPM INDUCTION GENERAT." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2926.
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The thesis discusses the development of closed loop system to control the DC voltage for 200 kW induction generator rated at a speed of 62000 RPM under different load conditions. The voltage regulation has been implemented using PI controller. A gain scheduling control algorithm has been developed to select the appropriate controller gains with respect to the generator load. Further, a relationship between the generator loads and the controller gains has been established. This relationship has been modeled using adaptive control technique to vary the gains automatically at any load condition. The adaptive control technique has been successfully generalized for real time DSP implementation to regulate the DC voltage for high speed induction generators rated from 5 kW to 200 kW.M.S.
Department of Electrical and Computer Engineering
Engineering and Computer Science
Electrical Engineering
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Shehada, Ahmed. "Novel Multilevel Converter for Variable-Speed Medium Voltage Switched Reluctance Motor Drives." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/85111.
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A novel multilevel converter that is especially suited for high speed multi-megawatt switched reluctance motor drives operating at the medium voltage level is presented. The drive is capable of variable speed, four-quadrant operation. Each phase leg of the converter contains an arbitrary number of cascaded cells connected in series with the phase winding. Each cell contains a half-bridge chopper connected to a capacitor. The converter is named the cascaded chopper cell converter. The modular nature of the converter with the ability to add redundant cells makes it very reliable, which is a key requirement for medium voltage drive applications. A comprehensive control algorithm that overcomes the challenges of balancing and controlling cell capacitor voltages is also proposed. A suitable startup algorithm to limit startup current and switching losses, as well as ensure that cell capacitor voltages remain controlled at startup, is suggested. Details of the drive design such as component sizing and control parameter selection are also discussed. A detailed simulation model is developed and explained, and simulation results are provided for primary validation. Operation with standard current and speed control is first simulated. Then a scheme that gives way to a controller that operates the drive in single-pulse mode is developed and presented. This single-pulse control scheme controls the turn-on and turn-off angles, as well as the energization voltage level, in order to obtain high efficiency. Practical considerations related to the drive such as reliability, efficiency, and cost considerations are also discussed. Finally, a detailed comparison of the proposed converter to another competing converter is performed. Besides its scalability to high voltages and powers, the reliability and efficiency of the proposed converter makes it also a candidate for sub-megawatt applications requiring minimum downtime, or any application where high efficiency or improved performance is required.
A small part of this work is also dedicated to brushless dc machines. Control methods for a new converter for brushless dc machines are proposed and verified via simulation. The main advantage of this converter with the proposed control is that it allows exact control of torque or speed up to twice the rated speed, without resorting to current phase advancing or other flux-weakening techniques.Ph. D.
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Úlehla, Martin. "Mikrokontrolery pro BLDC motory." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235900.
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Master thesis deals with solutions of BLDC motors (brushless DC motors) control. It analyses microcontrollers and electronic components suitable for BLDC motor controllers under conditions of serial production. It mentions some common problems in practical aplication like dynamic motor braking, synchronization, recuperation and constant revolutions.
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Baratieri, Cassio Luciano. "Controle de velocidade sensorless de motores brushless DC submetidos a variações periódicas de carga." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/8493.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorThis master thesis presents a sensorless speed control drive of Brushless DC motors used in reciprocating compressors. These compressors cause periodic load torque variations on the motor, consequently mechanical vibrations and acoustic noise are presented as well. As a result, a discrete speed controller based on the internal model principle is proposed. This controller aims to track the speed reference and to reduce the periodic torque disturbances caused by the compressor. The proposed controller consists of a rotor position and speed estimator, and a discrete speed controller with variable sampling frequency that depend on the rotor speed. The discrete estimator is based on the zero crossing point detection of the back-electromotive force. This method is optimized by using a Least Squares algorithm. The speed controller consists of two control actions, repetitive and proportional-derivative actions. In order to complement the drive system operation, a new procedure to start a BLDCM with current control is proposed. This technique ensures the maximization of the electromagnetic torque during startup and to avoid demagnetization of the permanent magnet by the stator current. Finally, simulation and experimental results are presented to demonstrate the performance of the techniques adopted, as well as the main advantages, disadvantages and operational limitations of the experimental implementation. In addition, the performance of the load torque rejection is evaluated by comparing the harmonic spectrum of the torques produced by the proposed speed controller and a PI controller.
Esta dissertação apresenta um sistema de acionamento e controle de velocidade sensorless para motores Brushless DC utilizados em compressores alternativos. Estes compressores provocam variações periódicas de carga sobre o motor causando vibrações mecânicas e ruído acústico. Em vista disso, um controlador discreto de velocidade baseado no princípio do modelo interno é proposto. Este controlador visa o rastreamento assintótico de uma velocidade de referência e a redução dos distúrbios cíclicos de conjugado provocados pelo compressor. Para isso, o sistema proposto é constituído por um estimador discreto da posição e da velocidade do rotor, e um controlador discreto de velocidade com frequência de amostragem variável em função da velocidade de rotação. O estimador discreto baseia-se na deteção do cruzamento da força contra-eletromotriz por zero, a qual é otimizada por meio de um algoritmo de Mínimos Quadrados. O controlador de velocidade é composto por duas ações de controle, uma ação repetitiva e uma proporcionalderivativa. De forma a complementar a operação do sistema de acionamento, um novo procedimento de partida com controle de corrente é proposto para o BLDCM. Este procedimento possibilita a maximização do conjugado eletromagnético do motor durante a partida e ainda evita a desmagnetização dos ímãs pela incidência de altas correntes estatóricas. Por fim, resultados de simulação e experimentais são apresentados para demonstrar o desempenho das técnicas adotadas, assim como as principais vantagens, desvantagens e limitações operacionais da implementação experimental. Além disso, a performance da rejeição parcial do conjugado de carga é avaliada com a comparação do espectro harmônico dos conjugados produzidos pelo controlador de velocidade proposto e por um controlador proporcional-integral.
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Januška, Adam. "Model laboratorního pohonu pro výukové účely." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413132.
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This thesis is focused on simulation of laboratory stand located on University of technology in Brno which is containing DC and asynchronous motor. This thesis includes mathematical model of DC motor, regulator of current, regulator of speed and DC convertor. It also contains model of asynchronous squirrel cage motor and models for scalar and vector control. Whole simulation is calculated in Simulink which is part of program Matlab.
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Zdařil, Tomáš. "Regulátor otáček pro střídavé motory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219772.
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The goal of the thesis was to design and create one-way speed controler for brushless DC motors, that is used in air modeling. The circuit is controlled by the Atmel AVR. As power unit for motor is used Li–pol accumulator. The controller is equipped with BEC to power the receiver and allows monitoring of current consumption and voltage on the accumulator. Measured data can be upload to a PC where they can be displayed by RegulatorPC in graphical form.
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Janeček, Jan. "Řízení pohybů dvouramenného žonglovacího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230105.
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The diploma thesis is a part of the project Intelligent double arm juggling machine. The project is divided into two diploma thesis. This thesis deals with the motion control of juggling arms. Information about hardware and software resources used in this project is in the first part of thesis. There is explanation of the control loop, explanation of used communication protocols and implementation of program proceeding in the second part of thesis.
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Šandera, Tomáš. "Třífázový střídač pro napájení vysokootáčkového asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318175.
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The master’s thesis deals with design and realization of three-phase inverter for experimental high speed asynchronous motor with a mechanical power of 6 kW. The thesis deals with the design of the individual components of the DC link. The thesis describes the selection of suitable capacitors in the DC link. There is also a complete simulation of the inverter in the Matlab Simulink program. Part of the thesis is also the design and realization of printed circuit boards of this inverter.
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Samir, Mourad. "Etude d'une plate-forme biaxiale en rotation destinee a l'etude dynamique de la fonction equilibration chez l'homme." Toulouse 3, 1986. http://www.theses.fr/1986TOU30111.
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Šoupal, Ondřej. "Programování mikrokontrolérů c2000 v programu MATLAB/Simulink." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413221.
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The aim of this thesis is to explore possibilities of rapid control prototyping, describe the concept of creating the software application in MATLAB/Simulink environment with use for development kit Texas instruments LaunchPad and create an application for DC and induction motor control in this environment. This work describes the application for unipolar/bipolar control H-Bridge of power converter for DC motor, measurement of output currents, speed and its displaying in real time using serial control interface. This thesis also desribes scalar and vector control of induction motor. All software applications with measurements are created in MATLAB/Simulink and attached to the thesis.
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Zhu, Chaoying. "Induction motor speed sensing and control." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358985.
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Retuerta, Iu. "The interface communicate to DC motor control." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10425.
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Dridi, Hocine. "Microprocessor control of a DC variable speed drive." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319962.
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Siewert, Marcus. "Development of a control system for DC-motor." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9576.
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A control system for a BLDC (Brushless Direct Current) motor has been developed in Labview 2009. This report explains how it works, conclusions and some information about things that could have been done differently. This report is also a good introduction to Labview including its advantages and disadvantages. It also explains how a FOC (Field Oriented Control) works.
This is the public version of the report which does not include any results or information about the implementation. This information can be found in the original report which only authorized persons have access to.
19
Murad, Thamir Faraj. "Digital control of chopper-fed DC motor drive." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/10836.
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Abed, Abed. "Fundamental control aspects of the brushless DC motor." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277513.
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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 airgap flux density that is higher than that in the magnets. The original contribution of the thesis is a novel rotor construction that achieves high power density through flux focusing, but in contrast to the approach of Prof K Binns, also achieves a cost effective design regarding manufacturability. The work in this thesis considers the use of 2D finite element techniques that is used to handle the electromagnetic part of the design process and provides the way in which its results identify benefits that arise from use of different forms of the rotor geometries. New design principles are described and methods of analyzing and predicting the motor performance from design data are presented and validated by comparisons of experimental and predicted results. A motor design programme is developed and its design format is presented. The essential technical features of a proposed integral power electronic controller are described. The methods of selecting an appropriate motor for an application, simulation and prediction of motor performance, thermal analysis and acceleration performance are all presented and validated by experimental measurement. The constructional features land the design techniques of the 3-phase permanent magnet brushless dc motor developed in this study have been applied to a number of commercial aerospace and defence applications and have proved to be extremely effective and competitive. Typical practical examples of applications are presented. The challenge of the study was to improve motor efficiency significantly and to design a motor that can withstand very high peripheral speeds while at the same time develop high power density without suffering from overheating. These special requirements are typical in modern aerospace and defence applications.
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Yang, Ke-Chin, and 楊克勤. "Remote Fuzzy Control in DC Motor Speed." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/49051352679318697856.
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碩士國立海洋大學
機械與輪機工程學系
89
This paper presents a remotely fuzzy control in DC motor speed monitoring system with LabVIEW and Matlab. We use fuzzy controller to adjust parameters, in order to get the optimal speed response. First, the membership functions are defined according to motor dynamic mode, and use Matlab to construct fuzzy controller. Using Fuzzy PID system and Linear Fuzzy Controller (training by Adaptive Network-base Fuzzy Inference System, ANFIS) respectively construct the controller of the monitoring system. The difference of the two controllers at the speed response is discussed to compare. Tracking of Fuzzy PID controller is faster, but there is still some steady error. Tracking of Linear Fuzzy Controller is slower, but output response is more correct. And designer don’t have to adjust gains or parameters of system in Linear Fuzzy Controller training by Adaptive Network-base Fuzzy Inference System. A friendly Man-Machine Interface (MMI) is provided to make the operation more convenient and easier to use. The proposed scheme simplifies the design procedure and complexity of the fuzzy controller. Otherwise, RS-232 is used as an interface of DC motor speed monitoring system.
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Hsu, Pang-Hung, and 許邦泓. "Low Speed Control of Brushless DC Motor Drives." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/47347838119785404265.
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碩士南台科技大學
電機工程系
97
Comparing to the conventional DC motor and induction motor, the brushless DC motor (BLDCM) has superior merits, such as high torque, high performance, extensive working speed range, and without commutator and brush. BLDCM has been widely used in the industrial applications because of its cost and efficiency. Normally, Hall-effect sensor is used to detect the rotor position for commutation. However, the Hall sensor is low-resolution especially at low speeds and sensitive to the temperature. Therefore, the sensorless control scheme is considered in the thesis. In the thesis, the rotor position is estimated without employing current sensors and analog-to-digital converters (ADCs) at standstill and during motor running. The initial rotor sector is first detected by employing low-frequency and low-voltage injection instead of conventional high-frequency and high-voltage injection to improve the sector estimation. After start-up, the rotor angle is synchronously estimated with pulse-width modulation (PWM) frequency such that the number of estimation increased in the case of lower speed command. This will be more efficient in low speed control. In addition, a new method which can raise the signal frequency of hall sensor through a frequency-independent phase shifter (FIPS) is proposed in this thesis. It can improve the performance of the control system especially at low-speed region. Finally, the DSP TMS320F240 and FPGA EP2S60F672C3 are adopted in the system to verify the effectiveness.
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Wang, Sheng Kuei, and 王聖魁. "Digital Filter Design for DC Motor Speed Control." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/15287684672341960332.
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CHEN, JIA-QIN, and 陳家欽. "Fully digital speed control of DC brushless motor." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/42406978536539499253.
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Wei, Hsu-Chia, and 徐家偉. "DC Servo Motor Speed Control with Energy Saving Analysis." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/63447039402034344463.
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碩士東南科技大學
機械工程研究所
101
This study designs a DC servo motor speed control system , and utilizes the method for energy saving effect。The PWM signal is applied to the DC drivers, and the inductance of DC motor affect the speed responses with PWM signals is investigated. A direct neural control (DNC) based on back propagation neural networks (BPN) with specialized learning architecture is applied to control and regulate the speed of DC servo motor. The common DNC system usually needs an emulator, but the proposed neural controller is treated as a speed regulator without the specified reference model. A tangent hyperbolic function is used as the activation function, and the back propagation error (BPE) is approximated by a linear combination of error and error’s differential with high convergent speed. The simulation results reveal that the proposed method is available to speed regulator keep motor in constant speed, and the energy consumes also investigated. The comparison of energy consumes between the conventional PID control and the DNC system is investigated by simulation. The simulation results also reveal the DNC system can control the DC motor in accurate speed with less energy consume. Keywords: DC servo motors, Speed regulator, Neural networks, Energy saving controls
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Chang, Ying-De, and 張英德. "Intelligent Control of High-Speed Sensorless DC Brushless Motor." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/91660712395754464813.
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碩士國立交通大學
電機與控制工程系所
95
In this thesis, the fuzzy logic controller (FLC) for sensorless brushless dc (BLDC) motor was proposed to synchronize the rotors with the stator windings commutation sequence to obtain the optimum efficiency of motor. There are two modules proposed in the speed control of BLDC motor, i.e. command and regulating modules. Command module is to find and issue commutation period and PWM duty cycle to the BLDC motor for desired speed. The regulating module is designed as a FLC and is used to regulate the speed of BLDC motor subject to disturbances, such as loading effect. Two resistances are adopted to detect the back-EMF signal on the unexcited phase instead of using the expensive Hall sensors. The regulating module can accurately and quickly regulate the PWM duty cycle by fuzzy reasoning which makes the BLDC motor rotate smoothly at desired rotational speed even if there is an external disturbance. In order to reduce the computational load of real-time FLC for the microcontroller C8051F330, we can perform the FLC computation off-line to cover nearly all cases. These data will be recorded and organized as a Look-Up Table (LUT). The regulating module is designed by FLC yield the better results than that without regulating module, and the regulating module via P controller.
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Chang, Wei-Yau, and 張維堯. "Brushless DC Motor Control Without Position and Speed Sensors." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/22123435011943354200.
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碩士國立清華大學
動力機械學系
84
The thesis forcuses on sensorless design and speedontrol of brushless DC motor. The operation of brushless DCotor relies on position sensors to detect the rotor magneticole position, and then the proper commutation signal can bebtained. Besides, the speed sensor is needed to constituteor speed feedback loop. The first part of the thesis is totudy the sensorless algorithm to replace position and speedensors of motor. The second part is to apply digital phase-ock loop (DPLL) control algorithm for the sensorlessrushless DC motor. First, a steady, simple algorithm for position sensorlesss proposed to detect rotor magnetic pole position. So thathe Brushless DC motor can operate correctly without Hallensors. Then a speed sensorless method is suggested for arushless DC motor in order to replace the FG sensor whichs widely used in brushless DC motor. The speed sensorlessethod uses three phase commutation signal of motor toenerate a square wave, a FG-like wave, which can be treateds a FG sensor with 12 pulses each motor mechanical period.he FG-like wave is used to give speed feedback signal forpeed control. Second, a digital phase lock loop speed controller issed for the full-sensorless brushless DC motor. A DPLLontroller constitutes automatic frequency controller (AFC) nd automatic phase controller (APC). AFC is used to decreaseise time of motor speed, and APC is used to improve speedluctuation of motor.
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梁智淵. "Grey Predictor Applied to Speed Control of DC Motor." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/4nr5ew.
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碩士國立交通大學
電機與控制工程系所
92
This thesis verifies the efficiencies of grey predictor on the prediction of the disturbances and the application to speed control of DC motor. Sliding-mode control is chosen here for speed control of DC motor because of its robustness of eliminating the matched disturbances. The traditional sliding-mode control has such property with the hypothesis that the upper bound of the disturbances is known. However, the upper bound of the disturbance is difficult to be measured or estimated exactly, and the system would be unstable if the upper bound is not well estimated. It is obvious that if the value of the disturbances could be predicted well, the upper bound would not be necessary information any more. In the thesis, the performances of grey predictor are evaluated with several distinct disturbances and compared with the performances of linear regression method. The simulation results show that grey predictor has well performances for the disturbances with lower frequency or less rapid variations, and it can solve the problem of estimating the upper bound of the disturbances.
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Valeri, Francesco. "Model reference adaptive speed control of a DC motor drive." Thesis, 1994. http://spectrum.library.concordia.ca/3688/1/MM01351.pdf.
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SHUMING, LIU, and 劉書銘. "Brushless DC Motor Sensorless Speed Control with Back-EMF Detection." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/2ey7w4.
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碩士國立臺灣科技大學
電機工程系
99
This thesis aims to implement the sensorless speed control system for brushless direct current (BLDC) motor with the Field Programmable Gate Array (FPGA) chip. It could determine the position of rotor according to the information of back electro motive force (back-EMF) without Hall sensor. This system use the analog to digital converter (ADC) to detect the back-EMF zero crossing points, then commute the motor. But the estimation for zero crossing points would be easily interfered by noise signals.The interference with noise could be reduced with some suitable decision rules.So this system could detect the zero crossing points correctly. And let the motor spins smoothly.
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CHEN, SYUAN-TING, and 陳炫廷. "Design of DC Motor Speed Control Based on Touch Panel." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/95209626102597593818.
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CHANG, Ting-Ting, and 張婷婷. "Design & Implementation of fuzzy control chip in DC motor speed control." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/50096258383091961880.
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碩士中華技術學院
電子工程研究所碩士班
93
This thesis presents two different frames of fuzzy controller on Field Programmable Gate Array (FPGA) by using Very High speed integrated circuit Hardware Description Language (VHDL). One is look-up table and another is real-time operation. The frame of look-up table is constructed by fine table and coarse table. The fine table is used to compensate the controller output of coarse table to promote system performance. Finally, we apply the fuzzy chips implemented by the ways of look-up table and real-time operation to motor speed control. The experiments show that they have good results.
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Wang, Hsiao-Ping, and 王孝平. "FPGA Implementation of High-Speed Fuzzy Control Algorithm for DC Motor Position Control." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/80713732098385516981.
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碩士華梵大學
電子工程學系碩士班
97
Abstract In this thesis, a fuzzy controller which is implemented in an FPGA chip is used for the position control of DC motor. The digital circuit design for fuzzy controllers was widely studied in the literature with many applications. Compared with the existing works, this thesis will focus on the design issue of circuit operation speed and would like to realize a high speed fuzzy controller. To achieve this objective, we use the technique of parallel architecture, direct computation and combinational circuit for the design of controller. In order to simplify the operation of input firing, we adopt the triangular membership function as the fuzzy sets for antecedent part. Only those triggered fuzzy rules are used to calculate the firing strength when dealing with the fuzzy inference. For the consequent part of the fuzzy rule, the design parameters are stored as a ROM TABLE so that it can be easily achieved for fuzzy inference. Finally, the center average defuzzifier is used to construct the defuzzification. As the divider is the most important part of defuzzification, a special divider circuit structure is proposed so that only one clock computation time is required for the operation of division. In order to demonstrate the correctness and efficiency of the proposed fuzzy control circuit, we combine the fuzzy controller with feedback circuit, comparison circuit as well as driving circuit and implement the whole controller in a Xilinx spartan3 FPGA chip. The digital fuzzy controller is applied to the position tracking control of DC motors. According to the simulation and experimental results, we show that the presented fuzzy control circuit is feasible. Keywords：FPGA, fuzzy control, DC motor
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LIN, DA-WEI, and 林大為. "Application of variable-structure model-following control system in DC motor speed control." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/05346259009577894029.
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Lin, Cheng-Tsung, and 林正宗. "Speed Sensorless Control for Four-Switch Three-Phase Brushless DC Motor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/41289516626194726741.
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博士臺灣大學
電機工程學研究所
95
This dissertation proposes a novel asymmetric pulse width modulation (PWM) scheme for four-switch three-phase (FSTP) brushless dc (BLDC) motor drives. This PWM scheme not only achieves the BLDC motor using FSTP inverter, but also does not need any current sensor and complex algorithm, so it can make the lowest manufacture cost of the inverter. Furthermore, this dissertation proposes a novel commutation control for the FSTP BLDC motor drive without position sensor. This sensorless control detects the crossing point of two floating voltages, and estimates the commutation timing. This sensorless control only needs two voltage sensors, so it not only reduces the cost of position sensors, but also increases the reliability of whole system. When the BLDC motor drive uses Hall sensors as position sensors, sampling rates of the rotor speed will change with the rotor speed of BLDC motors. The fuzzy PI controller presented in this dissertation includes three fuzzy logics and three PI controllers. When the speed of BLDC motors changes, fuzzy logics will give PI controllers suitable speed errors to achieve robust control. The fuzzy logic of the fuzzy PI controller presented in this dissertation is based on the rotor speed, and therefore the controller reduces the complex of fuzzy logics and is easy to be implemented. Finally, we implement our novel asymmetric PWM scheme and novel sensorless control in DSP (Digital Signal Processor) which is designed by Texas Instruments, TI, incorporated and FPGA (Field Programmable Gate Array) which is designed by Xilinx to prove that the sensorless control does not need complex calculation, and can be implemented in very low cost controller.
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Lin, Cheng-Tsung. "Speed Sensorless Control for Four-Switch Three-Phase Brushless DC Motor." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2707200701541500.
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Lai, Chiu-Ming, and 賴秋名. "The Speed Control of Sensorless Brushless DC Motor Using Fuzzy Controller." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/u4n53h.
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碩士崑山科技大學
電機工程研究所
97
This thesis proposes the fuzzy controller to the speed control of sensorless brushless DC Motor (BLDC) based on digital signal controller dsPIC30F4011. The BLDC mainly uses inverter to substitute for carbon brush and commutator. Under the incentives of both energy and environmental protection, BLDC will substitute for DC motor and will become the drive component of high-efficiently environment-friendly product. In general, the BLDC can be divided into sensor drive and sensorless drive techniques. The sensor drive technique uses Hall sensors to detect rotor position, which can be successfully started up whenever motor is static or operated at low speed condition. But due to the installation of Hall sensors, the motor size is large and the cost is increased. The sensorless drive technique employs back electromotive force (BEMF) signals to detect rotor position, which can improve the disadvantages of sensor drive technique. To carry out the close-loop speed control, this thesis applies fuzzy theory to design a controller which can accommodate the response of load variation. Fuzzy controller can make a good control whenever the system is nonlinear or its mathematical model is unknown. Therefore, the fuzzy controller is widely used in the industrial circles. To verify the feasibility of the proposed method, this thesis employs three-phase brushless DC motor (1.5Hp) to fulfill the experiments. The proposed method utilizes start-up experiment to validate the feasibility of BEMF method. Then the fuzzy controller is employed to verify the control performance under different speed commands with load variation.
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Yang, Zih-Yi, and 楊紫億. "Development of High Speed Control System for Brushless DC Motor Drives." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59307782421576958173.
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碩士國立臺灣科技大學
電機工程系
98
This thesis is concerned with the development of the control system for brushless dc (BLDC) motor in high speed applications. A control policy which combines pulse-amplitude modulation with pulse-width modulation is proposed to control the input voltage according to the speed command for BLDC motor drives. A dc-dc power converter is designed to change the voltage from 140~200 to 24~48 volt. The BLDC motor drives use three hall-effect sensors to detect rotor position and calculate motor speed for six-step square-wave and closed-loop control of speed. In this thesis, the digital signal processor, dsPIC30F4011, is adopted as the control core. C-language is used for dc-dc power converter control, BLDC motor drives control and realization of control policy which combines pulse-amplitude modulation with pulse-width modulation. A prototype of 80W is built and accuracy of speed command is below 1.5% for high speed control drives from 1 k to 20 k rpm speed. The experimental results verify the proposed performance.
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Hsiao, Yu-Min, and 蕭裕民. "Research and Development of DC Motor Speed Control System Including Current Control Employing NiosⅡ." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04901073204249550110.
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碩士元智大學
電機工程學系
98
The purpose of this thesis is to design a motor speed control system with current limit. The frame of the control system use as NiosII. It is the whole applications of an embedded system and system on programmable chip(SOPC). The chip is Altera Cyclone Chip. Using NiosII we integrate the speed fuzzy control, current control, PWM, and the encoder circuit into this motor speed control system. Through RS-232 interface to communication with computer. We are able to control the motor speed effectively under a variety of load conditions.
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Liu, Chia-Fang, and 劉佳芳. "Research and Development of DC Motor Speed Control Chip Employing VHDL Language." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/77614870038587144703.
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碩士元智大學
電機工程學系
93
The propose of this thesis is to use Very high speed Hardware Description Language(VHDL) and to configure a program into a selected CPLD chip to control DC Motor speed.The series number of CPLD chip is EPF10K10TC144-4 and it was producted by the Altera company.The chip control core is based on fuzzy theory.And,theassociated encoder counter circuit、differentialcircuit and filter circuit were integrated into the chip as well.The DC Motor used was 2224U012SR DC Motor of MINIMOTOR series and was manufactured by theFAULHABER company.Experimental results were provided to verify all functional requirements of the DCMotor Speed Control Chip.
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Chan, Wei-Chun, and 詹偉群. "Robust Speed Control of Brushless DC Motor Drive Using Quantized Current Regulator." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/ad9hdf.
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碩士國立中山大學
電機工程學系研究所
97
Based on sliding-mode control theory, this thesis proposes an integrated design of robust speed controller and quantized current regulator to achieve the control of inverter for BLDC motor. Moreover, using Digital Signal Processor (DSP) as well as the proposed inverter technology as the control kernel, a fully digital drive module of Brushless DC motor (BLDC) is robustly designed to achieve the high-performance speed control. Under the influence of system disturbances, the designed drive module can obtain a good tracking response for speed and current control. According to the simulation and experimental studies, the proposed hybrid control strategy can simultaneously achieve the objective for the speed and current control of BLDC motor. Compared with traditional pulse-width modulation (PWM) based PID control, the better speed control performance can be conducted by the provided approach.
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Yu, Po-Hsiang, and 游博翔. "Permanent Magnet DC Motor Sensorless Speed Estimation and Variable Structure Control Design for a PMDC Motor." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/6hd9jf.
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碩士國立中興大學
電機工程學系所
99
In this thesis, we propose a post-filtering approach to output feedback variable structure control of a permanent magnet DC servo motor. The post-filter states the dynamical relationship between the armature current and the angular velocity. It is derived from the system model. The output signal is the armature current, which is fed into the post-filter to yield the angular of the motor. Thus, the post-filter can be used to estimate the angular velocity of the motor by the output current data. Therefore, the purpose of sensorless speed estimation is achieved. The sliding surface is designed as a linear combination of the armature current and angular velocity. Since the angular velocity can be obtained from the output of the post-filter, the sliding variable can then be constructed directly from a new post-filter with the armature current as the input. Applying a switching type of variable structure control law renders sliding mode with chattering effects. To reduce chattering, we employ a saturation function to substitute the signum function for the sliding variable in the control loop. In addition to the post-filter for estimating the angular velocity of the motor, we also use state observers in both full- and reduced-order forms. It is seen that the proposed post-filtering approach outperforms those with the observers. The experiments are conducted on a SANYO V730-012EL8 PMDC motor to validate feasibility of the proposed methods.
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Huang, Xing-Yao, and 黃興曜. "A Modified IMC Control Scheme Applied for the Rotational Speed Control of DC Motor System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/37607313791214228941.
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碩士龍華科技大學
工程技術研究所
100
The rotational speed control of DC motor system is a high-order, nonlinear and time-variant system, and it would become to be an unstable system while outside disturbances or unknown load existed. Owing to the unstability of the controlled system, it was very difficult to derive a simple and accurate mathematical model for a traditional controller design such as PID control. This paper tries to combine a feedforward integrator and IMC control theory for the rotational speed control of DC motor system, in order to improve the performance and stability of the overall closed-loop system. Eventually, the robustness and response of the proposed modified IMC controller was proved to be better than those of a traditional PID control through the verification of experiment results and the proof of mathematical theory .
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Huang, Xing-Yao, and 黃興曜. "A Modified IMC Control Scheme Applied for the Rotational Speed Control of DC Motor System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/95671843600758390492.
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碩士龍華科技大學
工程技術研究所
101
The rotational speed control of DC motor system is a high-order, nonlinear and time-variant system, and it would become to be an unstable system while outside disturbances or unknown load existed. Owing to the unstability of the controlled system, it was very difficult to derive a simple and accurate mathematical model for a traditional controller design such as PID control. This paper tries to combine a feedforward integrator and IMC control theory for the rotational speed control of DC motor system, in order to improve the performance and stability of the overall closed-loop system. Eventually, the robustness and response of the proposed modified IMC controller was proved to be better than those of a traditional PID control through the verification of experiment results and the proof of mathematical theory .
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Chia, Chiang, and 賈嬙. "IMC-PID Hybrid Control Scheme Applied for the Rotational Speed Control of DC Motor System." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/23296428642337742464.
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碩士龍華科技大學
工程技術研究所
101
The rotational speed control of DC motor system is a high-order, nonlinear and time-variant system, and it would become to be an unstable system while outside disturbances or unknown load existed. Because of uncertainty and unstability of the controlled system, it was very difficult to derive a simple and accurate mathematical transfer function for a traditional controller design such as PID control as well as internal model control IMC. This paper incorporates the IMC control architecture with PID control theory for the rotational speed control of DC motor system, in order to improve the performance and stability of the overall closed-loop system. Eventually, the robustness and performance of the proposed advanced IMC-PID hybrid control architecture was proved to be better than those of a traditional PID control through the verification of experiment results and the proof of mathematical theory.
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CIOU, YI-JING, and 邱奕境. "Application of CompactRIO Embedded System Design to Speed Control of Brushless DC Motor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/enp5zu.
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碩士大華科技大學
電機與電子工程系
107
Embedded system design is a newly developed technology, which has been widely used in mobile phones and motor control fields. Due to easy control, small size and durability, brushless DC motors have become the new favorite of servo motor design. Therefore, how to develop an embedded system-based brushless DC motor fixed speed controller design become an important industrial practical application. This study uses the NI CompactRIO system, which is an open embedded system architecture and is composed of RT controller, FPGA Chassis and C series modules. Combined with the graphical programming language LabVIEW, the embedded system design of the brushless DC motor fixed speed controller design can be successfully achieved. This thesis is aimed at the study of NI CompacRIO-9066 and its built-in C Series Module (NI9502 motor controller), the LabVIEW FPGA Module, and the LabVIEW SoftMotion Module’s motor control VI. The aim of the research is attempted to combine the following three technologies: brushless DC motor speed control, embedded system design and LabVIEW programming language design, in order to develop an embedded system and LabVIEW-based fixed speed controller design of brushless DC motors. Simulation results verify the usefulness of the study.
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Wang, Tzu-Chien, and 王子健. "Speed Control of Four-Switch Three-Phase Brushless DC Motor without Position Sensors." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/55048584178763861139.
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碩士國立臺灣大學
電機工程學研究所
96
This thesis proves the practicability of the low cost structure using a four-switch three-phase inverter without position sensors, and proposes a novel fuzzy PI control theory. Besides theory computation, the thesis also presents complete experimental results in proof of the theory. Decreasing the cost of the actuators is a tendency in the future. This thesis applies a novel asymmetric pulse width modulation (PWM) scheme and uses the structure of four-switch three-phase (FSTP) brushless dc (BLDC) motor drives to reduce the cost. This PWM scheme not only achieves the BLDC motor using FSTP inverter, but also does not require any current sensor and complex algorithm, so the lowest manufacture cost of the inverter could be achieved. First, this thesis applies a novel commutation control for the FSTP BLDC motor drive without using position sensors. This sensorless control detects the crossing point of two floating voltages, and estimates the appropriate commutation timing. It only requires two voltage sensors to reduce the cost of position sensors and increases the reliability of whole system. Furthermore, this technique reduces the numbers of power switches and doesn’t require any position sensor. When the brushless dc motor runs with or without Hall sensors, the frequency of the position signals depends on the rotor speed. Considering this phenomenon, the fuzzy PI controller including three fuzzy logics and three PI controllers is designed in this thesis. If the speed of BLDC motor varies, the fuzzy PI controller will trigger the defined PI controllers depending on the rotor speed and sum the weighted output of each PI controllers. Then it delivers the command to the inverter in order to modulate the duty cycle. This kind of fuzzy PI controller provides higher flexibility of design, and a more robust goal is accomplished. The fuzzy logic of the fuzzy PI controller designed in this thesis is based on the rotor speed, and therefore the controller reduces the complex of fuzzy logics and is easy to be implemented. Finally, the whole algorithm is implemented in a DSP. This thesis focuses on distinct sampling methods, and the experimental results with distinct conditions are compared and discussed.
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Shiu, Hungyi, and 徐浤毅. "The Wireless Speed Control System For DC Motors." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/58773247909310545850.
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碩士義守大學
機械與自動化工程學系
100
This thesis used Arduino Duemilanove standard board as the platform to connect the motor control board and the rotary encoder and to communicate with the host computer wirelessly through the wireless module. The host computer received the rotational speed information from the Arduino board wirelessly. It utilized the encoder signal, the load variance and wireless time delay to decide the necessary voltage regulation by using the VB IF-THEN rule base. The host computer transmitted the regulation signal to Arduino board wirelessly. The Arduino board regulated the voltage delivered to the motor control board to control the rotational speed of the DC motor. Under the variant load condition, the purpose of motor speed maintenance was accomplished. This research discussed the topic of the wireless speed control problem of DC motors which may apply to the cases, such as the AGV of a product line, Ferris wheel and merry-go-round, etc.
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Wu, Yu-Cheng, and 吳昱錚. "Twelve-Step Sensorless Drive and Speed Control for a Three-Phase Brushless DC Motor." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/10195880769997494363.
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碩士國立交通大學
電機與控制工程系所
96
Small three-phase brushless direct current motors (BLDCMs) that own high reliability, high efficiency and good controllability are extensively adopted. However, the traditional BLDCMs have to use Hall sensors to detect thecorresponding position of the rotor and the stator which leads to some limitations: The Hall sensors must be locatedprecisely in the specific position beside the motor in order to exactly acquire the present state of the rotor; High sensitivityto temperture and disturbance; Life reducing; Cost increasing and obstruct the minimization of it. Using the sensorless drive schemes which do not rely on the Hall senors can improvevarious drawbacks mentioned above. On the basis of the 150° sensorless drive scheme[13],depended on the voltage and feedback current signals of the motor to reach the goal of normal drive. Overcome the influence of the pulse width modulation (PWM) signal during commutation for the purpose of controlling its speed. ; Applytwo approaches: Linear modulation approach and digital filter approach for the purpose of increasing its controllable speedrange; Attach an anti-windup controller for the propose ofimproving its speed response, and finally use these schemes to develop a digital sensorless drive chip applied to smallBLDCMs. The main results of this thesis have already published in the form of a journal paper [10] in Journal ofApplied Physics. The experiment using field programmable gate array (FPGA) and very high speed integated circuit hardwaredescription language (VHDL) to deal with the system planning level and module design. It includes estimating the linear modulated equation in order to normally commute while the speed of the motor is decreasing, applying a digital filter to overcome the disturbed commutation signal caused by PWM signal, and attaching an anti-windup controller toimprove the speed response. As a result, the interioroperations of the FPGA chip accompany peripheral motor, six-bridge circuit, feedback current using AD and voltage sensing to construct and verify a 150° sensorless drive control system.