小功率开关磁阻电机功率拓扑和驱动技术研究

Research on Power Topology and Driving Technology of Low Power Switched Reluctance Motor

研究了应用于不同开关磁阻电机的功率拓扑结构和驱动方案。利用PSpice对电容裂相型、电容储能型两种功率拓扑仿真分析,对不同功率拓扑的运行机理进行研究。针对仿真结果分析的前者电源电压利用率低、后者主开关的耐压要求高和控制稍微繁琐等问题,选择了一种适用的不对称半桥式拓扑,并针对该拓扑的特性给出了合理可靠的驱动方案。实验表明,本文所选择的不对称半桥模式驱动方法灵活,并提供斩波期间的续流和换相时快速的退磁反馈回路,可获得较小的转矩脉动。

This paper proposed the power topology and drive scheme of different switched reluctance motors.The operating mechanism of different power topologies was studied by using PSpice to analyze the two power topologies of capacitor split type and capacitor energy storage. In order to solve the problem of the former power supply voltage utilization at the bottom of the simulation results,the latter is the high voltage requirement and the control is slightly cumbersome and so on. A suitable asymmetric half-bridge topology was selected,and gave a reasonable and reliable driving scheme for the characteristics of the topology. The experimental results show that the asymmetric half-bridge mode driving method chosen in this paper is flexible,and provide the afterflow and the fast demagnetization feedback loop during the chopper period,obtaining a smaller torque ripple.