摘要
分析和研究了仅使用一个直流母线电流传感器驱动的无刷直流电机在换向过程中产生的转矩脉动的方法。对于这样的驱动,在高速和低速的情况下很难有效地抑制转矩脉动的产生。提出的补偿原理为:通过对占空比的控制使无刷直流电机在换相期间关断相的电流下降率和开通相的电流上升率相等。提出的控制策略能抑制转矩的突起和凹陷。仿真实验证明了这种方法的有效性。
It presented a comprehensive study on reducing commutation torque ripples generated in brushless DC motor drives with only a single DC-link current sensor. In such drives, commutation torque ripple suppression techniques that are practically effective in low speed as well as high speed regions are scarcely found. The commutation compensation technique proposed here is based on a strategy that the current slopes of the incoming and the outgoing phases during the commutation interval can be equalized by a proper duty-ratio con- trol. The proposed control method accomplishes suppression of the spikes and dips superimposed on the current and torque responses during the commutation intervals of the inverter. Effectiveness of the method is verified through simulations and experiments.
出处
《电气传动》
北大核心
2007年第6期16-19,47,共5页
Electric Drive
关键词
无刷直流电机驱动
换相转矩脉动
抑制
电流传感器
brushless DC motor drives commutation torque ripple reduction current sensor
