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DSP-based switched reluctance motor servo system research and development

Author: MaXun
Tutor: LiHui
School: University of Electronic Science and Technology
Course: Mechanical Manufacturing and Automation
Keywords: Switched Reluctance Motor PID control Digital controller Finite state machine
CLC: TM352
Type: Master's thesis
Year: 2011
Downloads: 123
Quote: 0
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Abstract


Switched reluctance motor (Switched Reluctance Motor SRM) because of its simple structure, good torque characteristics, is considered to be a promising drive device. Switched reluctance motor torque ripple is large, the traditional control methods is difficult to achieve the desired control effect. In recent years, using a variety of new control strategy to carry out the study of switched reluctance motor servo control technology, has been a hot research field of mechatronics. In this paper, 1.5kW four-phase 8/6 pole switched reluctance motor, research and design of a servo control system. This paper analyzes and discusses the related reluctance motor structure, operation principle and the characteristics of the speed control system based on the the measured inductance model and ideal inductor linear model established the quasi-linear inductance model of switched reluctance motor flux model for transfer The torque ripple Motor optimized to provide a basis. On this basis, further analysis and study the electromagnetic torque of the switched reluctance motor winding current, to establish the mathematical model of the two-phase motor is turned on at the same time, has been switched reluctance motor speed control method. On in the study on the basis of the above analysis, a 1.5kW four-phase 8/6 pole switched reluctance motor as the research object servo control system hardware and software design. The hardware design includes a power conversion main circuit and a control circuit and a peripheral circuit. The controller DSC dedicated motor control chip dsPIC33FJ16MC304 designed as the core, in addition to the position detecting circuit, the current detecting circuit, the auxiliary power supply design and the protection circuit and peripheral circuit design design. The main power circuit is a core part of the motor design uses the least power switch \Through in-depth analysis of the main switch freewheeling process, the two-phase chopper mode and four-phase chopper mode combination of energy in the different stages of speed feedback mode. The control algorithm using the the current chopping inner ring, speed outer ring double-loop PID control strategy, the segment PID control based on the establishment of quasi-linear model. The control software uses finite-machine-based structure of the program, through the implementation of the state of the system and transfer switch and implementation of systems of various state and function. Software using modular programming, enhanced versatility and readability of the program. Finally, experimental research and analysis system to achieve better speed effect.

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CLC: > Industrial Technology > Electrotechnical > Motor > A special motor > Reluctance motor
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