四相SRM驱动系统两相励磁功率因数校正研究

摘要

针对开关磁阻电机传统功率拓扑结构电源侧电流畸变严重,功率因数较低的问题,通过将电容后置,并且增加相应的开关管和二极管,提出一种功率拓扑结构,将其应用于两相励磁条件下的四相SRM进行功率因数校正.对该功率拓扑结构及其电容补偿方案进行了机理分析,基于Matlab/SIMULINK构建了四相开关磁阻电机驱动系统两相导通模式功率因数校正拓扑结构模型,对开关磁阻电机电压、电流、转矩等进行了全面仿真研究,验证了所提出方案的可行性及有效性.仿真结果表明,该拓扑结构不但可以改善系统的功率因数,并且减小了因电源波动引起的转矩脉动,优化了电机的起动性能,提高了效率.%In traditional power topological structure of Switched Reluctance Motor (SRM) , for the serious current distortion in power supply side and its result in the low power factor, by the use of the rear capacitance and increase the corresponding switch tube and diode, a new topological structure was presented, and was applied in traditional structure for power factor correction (PFC). The mechanism of new power topological structure and the capacitor compensation schemes were analyzed, four phases Switched Reluctance Motor Drive (SRD) system power factor correction topology structure with two phase conduction mode was modeling based on MATLAB/SIMULINK, and a comprehensive simulation study of SRM voltage, current, torque, etc. Was analyzed. It verifies the effectiveness and the feasibility the proposed scheme. The simulation results show that the topology structure can not only improve the power factor of system and reduce the torque ripple caused by power fluctuating, the motor starting performance is optimized and the system efficiency is improved.