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. 23, 2016
Filed:
Jun. 21, 2013
Zte Corporation, Shenzhen, Guangdong, CN;
ZTE Corporation, Shenzhen, Guangdon, CN;
Abstract
Disclosed is a control method for a series resonant converter is provided, which includes: a feedback signal is acquired by collecting an analog output signal of a series resonant converter, and an operating frequency of the series resonant converter is changed according to the feedback signal; the series resonant converter adopts a hybrid control mode combing frequency and width modulation with width-fixed frequency modulation when lightly loaded or unloaded and a frequency modulation control mode when heavily loaded, wherein a switching can be conducted between the hybrid control mode and the frequency modulation control mode through hysteresis control. By adopting a hybrid control mode when a series resonant converter is lightly loaded or unloaded and switching between the hybrid control mode and a frequency modulation control mode through hysteresis control, the disclosure effectively addresses the problem that the voltage of a series resonant converter is unstable when the series resonant converter is lightly loaded or unloaded at a low voltage, effectively expands the output range of the series resonant converter, and also addresses the problems that it is difficult to control a loop due to the monotony of the gain of an output voltage during a duty cycle adjustment process.