摘要
主要阐述了具有速度/电流双PI控制器的无刷直流电动机(BLDCM)调速系统的转矩脉动抑制技术。传统无刷直流电动机双闭环调速系统因非理想梯形波反电动势和非理想方波相电流存在较大的转矩脉动,为此,提出一种相电流整形和新半桥PWM方式相结合的方法。其中,基于线反电动势常数的相电流整形技术能够解决因非理想梯形波反电动势引起的转矩脉动,通过分析相电流换相过程得到的新半桥PWM方式能够解决因非理想方波相电流引起的换相转矩脉动。通过四象限运行时的Matlab仿真和DSP驱动实验,验证了所提双闭环调速系统的转矩脉动抑制方案的可行性和有效性。
This paper mainly describes a torque ripple reduction strategy for the brushless DC motor double- loop speed control system. In the traditional double-loop speed control system, brushless DC motor has large torque ripple because of the non-ideal trapezoidal wave back EMF and the non-ideal square wave phase current. So this paper proposes a control method combining the phase current shaping with the new half-bridge PWM mode. The phase current shaping method using line EMF constant can mitigate the torque ripple caused by the non-ideal trapezoidal wave back EMF. The new half-bridge PWM mode, obtained by analyzing the phase current commutation process, will decrease the commutation torque ripple due to the non-ideal square wave phase current. Finally, simulations with Matlab and experiment results with DSP, operating in four-quadrant operation, are presented to verify the feasibility and effectiveness of the proposed strategy.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第15期156-163,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金委员会与宝钢集团有限公司联合资助项目(U1260203)
国家自然科学基金(51477147)资助项目
关键词
无刷直流电动机
双闭环调速系统
转矩脉动抑制
相电流整形
四象限运行
Brushless DC Motor （BLDCM） , double-loop speed control system, torque ripple reduction,phase current shaping, four-quadrant operation
