开关磁阻电机调速系统功率变换器的仿真与研究

Simulation and Research on Power Converter Circuit for Switched Reluctance Drive

给出开关磁阻电机双开关型、公共开关型和星点型三种功率变换器的拓扑结构,分析了功率变换器拓扑结构结构特点及其工作原理。采用Matlab-Simulink软件建立了功率变换器的仿真模型,在不同脉冲信号的触发下进行系统的仿真,给出了开关磁阻电动机起动时的电流和电压曲线,并对仿真结果进行分析和研究,进而阐明了开关磁阻电机功率变换器拓扑结构的发展方向和应用前景。

Topologies of three switch circuits, two switch circuit public switch circuit, and start circuit,of the power converter for a four-phase 8/6 switched reluctance drive are introduced in this paper. At the same time, their principal and features are expatiated. Three models of the main circuit are set up based on a platform of Matlab-Simulink and simulated on a computer. As a result, a phase current waveform, voltage waveform of power converter main circuit and main switches are provided. It is clearly that the control system of power converter for public switch circuit is very simple but the ripple of current is large. On the contrary, the current ripple is smaller at the cost of more switches and the more voltage at the switches in start public switch circuit. This idea is offered based on more analyses and studies on simulation result of power converter circuit. The detailed pattern of the power converter circuit should be selected according to the different load requirements in the practical applications.