Crrc Zhuzhou Electric Locomotive Research Institute Co., Ltd.

Csr Zhuzhou Electric Locomotive Research Institute Co., Ltd.

Yonghui Nan

Jianghua Feng

Xiong Liu

Jing Shang

Junfeng Xu

Yuliang Wen

Yaping He

Chaoyang Zhang

Hanfeng Zheng

Lei Xiao

Kean Liu

Huadong Liu

A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.

Rotor temperature monitoring method and system for permanent magnet synchronous motor

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 &#x3c9;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.

Control method for restarting permanent magnet synchronous motor with speed, device and system thereof

Growing community of inventors

Hunan, China

Yonghui Nan