公开(公告)号：US11533007B2

公开(公告)日：2022-12-20

申请号：US17221629

申请日：2021-04-02

申请人： GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

发明人： Wenbin Ao ,  Bin Chen ,  Shengyu Xiao ,  Wenxian Wu ,  Yanzhang Wang ,  Xiaofei Zhang

IPC分类号： H02P6/16 ,  H02K29/08

摘要： A method and a system for detecting a logic level of a rotor of a motor, and a motor are disclosed. The method comprises: obtaining an analog voltage output by a position sensor for a winding of the motor; setting a first commutation voltage and a second commutation voltage; generating a logic level according to the analog voltage, the first commutation voltage and the second commutation voltage; and performing angle correction on the logic level according to a first angle corresponding to the first commutation voltage and a second angle corresponding to the second commutation voltage. The first commutation voltage is a commutation voltage for triggering a rising edge, and the second commutation voltage is a commutation voltage for triggering a falling edge. This method may accurately identify the logic level corresponding to the motor rotor, improve uniformity of a commutation voltage and prevent fluctuations in motor speed.