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:
Sep. 05, 2017
Filed:
Aug. 10, 2015
Johnson Electric S.a., Murten, CH;
Yue Li, Hong Kong, CN;
Chi Ping Sun, Hong Kong, CN;
Bao Ting Liu, Shenzhen, CN;
En Hui Wang, Shenzhen, CN;
Fei Xin, Shenzhen, CN;
Shing Hin Yeung, Hong Kong, CN;
Xiu Wen Yang, Shenzhen, CN;
Yan Yun Cui, Shenzhen, CN;
Shu Juan Huang, Shenzhen, CN;
Johnson Electric S.A., Murten, CH;
Abstract
A drive circuit for an electric motor connected in series with an AC power source between a first node and a second node. The drive circuit includes a controllable bidirectional AC switch, an AC-DC conversion circuit connected in parallel with the controllable bidirectional AC switch between the first node and the second node, a position sensor configured to detect a position of a rotor of the motor, and a switch control circuit configured to control the controllable bidirectional AC switch to be conductive or non-conductive in a predetermined way, based on the position of the rotor and a polarity of the AC power source.