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:
Aug. 18, 2015
Filed:
Jun. 10, 2013
Shenzhen Byd Auto R&d Company Limited, Shenzhen, CN;
Byd Company Limited, Shenzhen, CN;
Yongjun Hou, Shenzhen, CN;
Xiaohua Yang, Shenzhen, CN;
Shenzhen BYD Auto R&D Company Limited, Shenzhen, CN;
BYD Company Limited, Shenzhen, CN;
Abstract
A quasi-resonant device for a switching power, a quasi-resonant system for a switching power, and a method for a quasi-resonant control of a switching power are provided. The quasi-resonant device includes: a degaussing time sampling module, configured to sample a degaussing time Tof a secondary coil of the transformer according to a feedback signal output by the switching power after the switching tube is turned off; a valley sampling module, configured to sample a resonant valley signal of the quasi-resonant module according to the feedback signal; a time producing module, configured to produce a time T with a predetermined ratio D by processing the degaussing time T; and a logic processing module, configured to obtain a first valley signal after the time T, and the first valley signal works as a switching signal T' to turn on the switching tube.