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1. (WO2018032966) RESONANT CONVERTER

Pub. No.:    WO/2018/032966    International Application No.:    PCT/CN2017/095369
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Wed Aug 02 01:59:59 CEST 2017
IPC: H02M 3/335
Applicants: INVENTRONICS (HANGZHOU), INC.
英飞特电子(杭州)股份有限公司
Inventors: LUO, Shiwei
罗世伟
JIANG, Deilai
姜德来
Title: RESONANT CONVERTER
Abstract:
A resonant converter comprises: a resonant current retrieval unit (201) connected in series with a current loop of a resonant circuit (100), periodically retrieving a signal in a sampling interval, and acquiring, in each retrieved signal in the sampling interval, sampled signals representing a resonant current; a resonant current processing unit (202) averaging the sampled signals to obtain a feedback signal; and a driving control unit (203) controlling, according to the feedback signal, an operation state of a primary transistor in a rectifier unit at a primary side, so as to output a stable current from the resonant converter. The embodiment achieves the goal of providing, by sampling a resonant current, a stable current output from a secondary side, eliminates an optical coupling isolation device used in the prior art, prevents problems of high circuit costs and short service life caused by employing the optical coupling isolation device in the prior art, and provides a simple circuit structure.