一种新颖的无刷直流电机位置检测方法  

A Novel Research on Detecting Position of Brushless DC Motors

作　　者：王大方[1] 祝雅琦[1] 金毅[2] 刘智祺[1] 

机构地区：[1]哈尔滨工业大学汽车工程学院,威海264209 [2]装甲兵工程学院,北京10000

出　　处：《电工技术学报》2013年第2期139-144,共6页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金(HIT.NSRIF.2013123);威海市科技发展计划(2009-3-93)资助项目

摘　　要：为了实现无刷直流电机无位置传感器控制,提出了一种新颖的基于假中性点基波电压的检测方法。该方法比较电机断开相绕组端电压和假中性点电压的关系,通过得到两者交点直接获得转子位置信息。在H_PWM_L_ON和L_PWM_H_ON两种半桥调制方式下,无论电机处于PWM_ON还是PWM_OFF的时刻,该方法无需改变比较对象,具有普遍适用性。理论推导证明了该方法的正确性,实验给出了该方法在不同占空比下的控制结果,验证了这种方法的有效性。A novel phase detection method based on fundamental wave of the virtual neutral point was presented for the sensorless control system of Brushless DC（BLDC） motors. Rotor space--position information can be directly obtained by detecting the voltage difference between the open phase terminal and the virtual neutral point. In two half bridge modulation methods of H PWM L ON and L PWM H ON, both during PWM_ON and PWM_OFF periods, the comparing objects need not to be changed. The theoretical analysis proves the correctness of the method, and the control results are given under different duty cycles in the experiments, which confirms the validity of the proposed method.

关 键 词：无刷直流电机 无传感器控制 基波 PWM 

分 类 号：TM301[电气工程—电机]