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:
Oct. 12, 2010
Filed:
Aug. 07, 2007
Jianhong Zeng, Shanghai, CN;
Yuanyuan Zhang, Shanghai, CN;
Aibin Qiu, Shanghai, CN;
Kun Wei, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Jianhong Zeng, Shanghai, CN;
Yuanyuan Zhang, Shanghai, CN;
Aibin Qiu, Shanghai, CN;
Kun Wei, Shanghai, CN;
Jianping Ying, Shanghai, CN;
Delta Electronics, Inc., Taoyuan Hsien, TW;
Abstract
Provided is a flux regulation method for use in a power converter, wherein the method is carried out by a flux bias controller. The flux bias controller includes a current detector which is configured to detect the primary current of the transformer of the power converter in a predetermined switching cycle, a DC bias processor which is configured to obtain the duty ratio control signal according to the sampled primary current outputted from the current detector for a switching cycle later than the predetermined switching cycle, and a PWM controller which is configured to generate driving signals to control the on/off operations of the switching circuit of the power converter according to the duty ratio control signal, thereby suppressing the DC bias of the transformer by regulating the duty ratio of the switch circuit.