公开(公告)号：US10033313B2

公开(公告)日：2018-07-24

申请号：US15031479

申请日：2013-12-16

申请人： CSR ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD.

发明人： Jianghua Feng ,  Kean Liu ,  Junfeng Xu ,  Jing Shang ,  Yuliang Wen ,  Yaping He ,  Chaoyang Zhang ,  Xiong Liu ,  Yonghui Nan ,  Huadong Liu ,  Lei Xiao ,  Hanfeng Zheng

IPC分类号： H02P6/20 ,  H02P6/182 ,  H02P6/24 ,  H02P21/18 ,  H02P21/24 ,  H02P27/08 ,  H02P29/10 ,  H02P1/02 ,  H02P21/22 ,  H02P21/36

摘要： A control method for restarting a permanent magnet synchronous motor (PMSM) in a rotating condition, and a device and a system thereof are provided. In the method, an electrical angular speed ωe of the PMSM is obtained based on a speed of a trailer to obtain a back electromotive force of the PMSM. The back electromotive force is compared with a voltage at a side of an inverter, and if the electromotive force of the permanent magnet synchronous motor is higher than the voltage at the side of the inverter, the restarting of the PMSM is forbidden, otherwise, the restarting of the PMSM is allowed. Therefore, in the present disclosure, the low-speed operating condition and the high-speed operating condition correspond to different position angles of the rotor, and the PMSM is started based on the position angle of the rotor.

公开(公告)号：US09991829B2

公开(公告)日：2018-06-05

申请号：US15028156

申请日：2013-12-16

申请人： CSR ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD.

发明人： Jianghua Feng ,  Kean Liu ,  Junfeng Xu ,  Yaping He ,  Yuliang Wen ,  Jing Shang ,  Chaoyang Zhang ,  Xiong Liu

IPC分类号： H02P6/28 ,  H02P21/14 ,  H02P29/024 ,  H02H7/08

CPC分类号： H02P6/28 ,  H02H7/0805 ,  H02P21/14 ,  H02P29/027

摘要： A direct-axis current protection method and device for a permanent magnet synchronous motor drive system. The method includes: pre-calculating the direct-axis current of the next moment according to the current voltage transmitted from an inverter to a permanent magnet synchronous motor (PMSM); comparing the direct-axis current of the next moment with a maximum protection current; if the direct-axis current of the next moment is less than the maximum protection current, continuing transmitting the current voltage to the PMSM; if the direct axis current of the next moment is greater than or equal to the maximum protection current, redistributing the voltage according to a protection direct-axis current and a protection quadrature-axis current, and transmitting the redistributed voltage to the PMSM. The direct-axis current of the next moment is tended to be normal by adjusting the voltage.