开关磁阻电机多电平驱动系统研究

发布时间：2018-01-14 06:03

本文关键词：开关磁阻电机多电平驱动系统研究　出处：《天津工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：开关磁阻电机调速系统(Switched Reluctance Motor Drive,以下简称SRD),将开关磁阻电机、现代电力电子技术、微机控制技术很好地集合起来,构成一种新型的调速系统,具有简单结构、低成本、高效率、高可靠性、控制灵活等突出特点,逐渐成为专家研究的热点,被社会各界广泛应用。本文为了提高开关磁阻电机调速系统的效率和动态性能、减小转矩脉动,在已有的不对称半桥功率变换电路和四电平功率变换电路的启发下,改进它们的不足,设计出了一种用于开关磁阻电机调速系统的新型多电平功率变换电路。设计的新型多电平功率变换器与不对称半桥功率变换器相比增加升压电路部分,可以在开关磁阻电机运行时为电机提供5个电压等级,包括快速励磁、常压退磁、零压续流、常压退磁、快速退磁五个运行状态,可以在电机运行时根据需要大大减小相电流上升和下降的时间,提高系统效率和动态性能,并且有效地减小转矩脉动。本文以一台7.5KW三相12/8极开关磁阻电机作为主要的研究对象,首先在MATLAB/Simulink中分别建立了基于不对称半桥功率变换电路的驱动系统和基于多电平功率变换电路的驱动系统,进行了放真对比;其次进行了软硬件设计,搭建了 7.5KW开关磁阻电机多电平功率变换电路驱动系统的实验平台。从仿真结果对比可以得到所用开关磁阻电机模型的正确性;通过仿真和实验结果验证了多电平功率变换电路的正确性和可行性,其可以有效地减少电机运行时相电流上升和下降的时间,减小转矩脉动,提高整个系统的效率和动态性能。
[Abstract]:Switched reluctance motor drive system (Switched Reluctance Motor Drive, hereinafter referred to as SRD), the switch reluctance motor, modern power electronic technology, microcomputer control technology very well together, to form a new type of speed control system and has the advantages of simple structure, low cost, high efficiency, high reliability, flexible control and other prominent features, gradually become the research focus of experts, has been widely used in all walks of life. In order to improve the switched reluctance motor drive system dynamic performance and efficiency, reduce the torque ripple, inspired by the asymmetrical half bridge power converter circuit and the four level converter, improve their shortcomings, design a model for multi level converter switched reluctance motor drive system. The design of the new multilevel power converter with asymmetrical half bridge power converter compared to an increase of pressure rise in the circuit. Provides 5 voltage levels for motor SRM operation, including fast excitation, atmospheric demagnetization, zero pressure continuous flow, pressure fast demagnetization demagnetization, five running, can when the motor is running according to the need to greatly reduce the phase current rise and fall time, improve the system dynamic performance and efficiency, and effectively reduce the torque ripple. In this paper a 7.5KW three-phase 12/8 pole switched reluctance motor as the main research object, first were built in MATLAB/Simulink drive system based on asymmetrical half bridge power converter circuit and drive system based on multi power conversion, were really put contrast; secondly the hardware and software design, experimental platform the switched reluctance motor 7.5KW multilevel converter drive system. From the comparison of the simulation results can be obtained by using the correct model of switched reluctance motor; through Simulation and experimental results verify the correctness and feasibility of multilevel power conversion circuit, which can effectively reduce the time of motor phase current rise and fall, reduce torque ripple, and improve the efficiency and dynamic performance of the whole system.

【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM352

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