[关键词]
[摘要]
针对无刷直流电机(BLDCM)的换相转矩脉动问题,提出了一种基于双H桥变换器的BLDCM转矩脉动抑制方法。通过双H桥变换器电路产生补偿或抵消电流,减小非换相相电流的波动,从而达到抑制BLDCM转矩脉动的目的。在MATLAB/Simulink下构建了BLDCM转矩脉动仿真模型并进行对比仿真,与传统PID控制方法相比,该方法非换相相电流波动在高、低速下分别降低了约70%和40%,平衡后的转矩波动降低了约80%。结果表明:所提方法对于BLDCM在高稳定度和高精度要求领域中的应用具有重要价值。
[Key word]
[Abstract]
Aiming at the problem of commutation torque ripple in brushless DC motor (BLDCM), a method to inhibit torque ripple of BLDCM based on double H-bridge converter was proposed. Through the compensating or reducing current generated by the double Hbridge converter circuit, the fluctuation of the noncommutation phase current could be reduced so as to inhibit the torque ripple of the BLDCM. The simulation model of BLDCM was constructed in MATLAB/Simulink and was conducted comparative experiment, compared with the traditional PID control method, the new method’s current ripple of noncommutation phase decreased about 70% at high speed and 40% at low speed, respectively. Meanwhile, the balanced torque ripple decreased about 80%. The results showed that the new method has some practical value.
[中图分类号]
TM 301.2
[基金项目]
国家自然科学基金项目(51675054);北京市自然科学基金项目(3172013);北京市教委科技发展计划面上项目(KM201711232005);北京市重点实验室(机电系统测控)开放项目(5221735107)