校正无位置传感器无刷直流电机位置信号相位的闭环控制策略  

Closed Loop Control Method to Correct Position Phase for Sensorless Brushless DC Motor

作　　者：宋飞[1] 周波[1] 吴小婧[1] 

机构地区：[1]航空电源航天科技重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2009年第12期52-57,共6页Proceedings of the CSEE

基　　金：航空科学基金项目(02F52031)

摘　　要：分析位置信号相位与非导通相续流电流的关系,指出非导通相续流电流偏差能够准确地反应无位置传感器无刷直流电机位置信号相位误差。根据分析所得结论提出了一种校正位置信号相位的新型闭环控制方法。该闭环控制方法以控制非导通相续流电流对称为目标,以非导通相续流电流偏差为反馈量,通过PI调节器调节,及时调整过零点延时角度,从而达到自动校正位置信号相位的目的。实验验证了该控制方法能够实时、有效地校正位置信号相位。The paper analyzes the relationship between position phase error and freewheel current of silent phase. It is noted that freewheel current error can exactly reflect position phase error. Based on the aforementioned analysis, a novel closed loop control method to correct position phase is proposed. Freewheel current error is inputted to PI controller in order to keep freewheel current of the silent phase symmetrical, and delaying angel after zero-crossing is adjusted in time through PI controller. Thus the phase error is corrected immediately. The validity of the method is verified by experiments.

关 键 词：无刷直流电机 无位置传感器 相位误差 续流电流 闭环控制诊断 

分 类 号：TM301[电气工程—电机]