基于半桥变换器的电励磁双凸极电机角度优化控制策略

An Optimized Angle Control Strategy for Doubly Salient Electro-magnetic Motor Based on the Half-bridge Converter

电励磁双凸极电机(doubly salient electro-magnetic motor,DSEM)采用传统的控制方法在换相时容易产生负转矩,带来较大的转矩脉动。对DSEM转矩脉动产生机理进行了分析,对基于半桥变换器的DSEM主功率电路中分裂电容充放电平衡情况进行研究,在此基础上提出了基于半桥变换器的角度优化控制策略,进行了仿真和实验验证。结果表明,该方法可以有效减小转矩脉动,使电机转速平稳,有利于提高该电机的起动性能。

The doubly salient electro-magnetic motor （DSEM） suffers from the significant torque ripples when operating in the conventional angle control method. In order to weaken the effects of the torque ripples, the ripple generation mechanism was analyzed in this paper firstly. Then, the operation principle and the steady state of the split-capacitor in DC-link of the half-bridge converter were discussed in detail. Thus, an optimized control strategy of the half-bridge converter was proposed for the DSEM drives. The simulation and experimental results verify that the optimized angle control strategy can alleviate the torque ripples effectively and improve the motor performance.