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;
Kai Xiao, 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 electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.