The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2018
Filed:
Dec. 16, 2013
Csr Zhuzhou Electric Locomotive Research Institute Co., Ltd., Zhuzhou, Hunan, CN;
Jianghua Feng, Hunan, CN;
Kean Liu, Hunan, CN;
Junfeng Xu, Hunan, CN;
Jing Shang, Hunan, CN;
Yuliang Wen, Hunan, CN;
Yaping He, Hunan, CN;
Chaoyang Zhang, Hunan, CN;
Xiong Liu, Hunan, CN;
Yonghui Nan, Hunan, CN;
Huadong Liu, Hunan, CN;
Lei Xiao, Hunan, CN;
Hanfeng Zheng, Hunan, CN;
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD., Zhuzhou, Hunan, CN;
Abstract
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 ωof 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.