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:
Feb. 06, 2018
Filed:
Sep. 27, 2013
Shenzhen Byd Auto R&d Company Limited, Shenzhen, Guangdong, CN;
Byd Company Limited, Shenzhen, Guangdong, CN;
Hui Luo, Guangdong, CN;
Zhiyong Du, Guangdong, CN;
Xuguang Zhou, Guangdong, CN;
Xinxin Zhang, Guangdong, CN;
Xing Chen, Guangdong, CN;
Taotao Yang, Guangdong, CN;
Lipin Cheng, Guangdong, CN;
SHENZHEN BYD AUTO R&D COMPANY LIMITED, Shenzhen, Guangdong, CN;
BYD COMPANY LIMITED, Shenzhen, Guangdong, CN;
Abstract
A method for checking an out-of-step of a synchronous motor includes detecting three-phase currents of the synchronous motor; determining whether a relationship between the three-phase currents satisfies a preset requirement; and if no, determining that the synchronous motor is out of step. It is determined that the synchronous motor is out of step when amplitudes of each current of the three-phase currents are not equal or when the phase difference between the three-phase currents is not 120°.