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Title:
CONTROL METHOD AND DEVICE OF THREE-PHASE HALF-BRIDGE LLC RESONANT CONVERTER
Document Type and Number:
WIPO Patent Application WO/2018/019100
Kind Code:
A1
Abstract:
A control method and a device of a three-phase half-bridge LLC resonant converter for resolving an issue in which, when an existing three-phase half-bridge LLC resonant converter has low gain, it is difficult to realize zero-voltage turn-on of a switch transistor, resulting in an increase in switch loss. The method comprises: sampling an output voltage and an output current of a three-phase half-bridge LLC resonant converter to obtain a sampling result (11); performing a loop calculation on the sampling result to obtain a loop calculation result (12); controlling the three-phase half-bridge LLC resonant converter to switch from a three-phase half-bridge operation mode into a full-bridge operation mode if the loop calculation result is less than a first preset gain value and the three-phase half-bridge LLC resonant converter is currently in the three-phase half-bridge operation mode, in which the three-phase half-bridge LLC resonant converter comprises three MOS transistors, three of the MOS transistors of the three-phase half-bridge LLC resonant converter are in an on state when the three-phase half-bridge LLC resonant converter is in the three-phase half-bridge operation mode, and at least one of the MOS transistors is in an off state when the three-phase half-bridge LLC resonant converter is in the full-bridge operation mode (13).

Inventors:
WANG MINGJIN (CN)
BAO SHENGHUA (CN)
GUO HU (CN)
LI DAN (CN)
Application Number:
PCT/CN2017/091812
Publication Date:
February 01, 2018
Filing Date:
July 05, 2017
Export Citation:
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Assignee:
ZTE CORP (CN)
International Classes:
H02M3/28
Foreign References:
CN103683955A2014-03-26
CN102201739A2011-09-28
CN103560674A2014-02-05
CN104079152A2014-10-01
CN101841244A2010-09-22
EP2299580A22011-03-23
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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