Title:
LIGHT-LOAD OPERATION CONTROL SYSTEM AND METHOD FOR THREE-PHASE CLLLC RESONANT CONVERTER
Document Type and Number:
WIPO Patent Application WO/2024/032330
Kind Code:
A1
Abstract:
Disclosed in the present invention are a light-load operation control system and method for a three-phase CLLLC resonant converter. The light-load operation control system comprises: a PI regulator module, a VCO module, a comparison module, a phase shift module and a mode switching module; the PI regulator module is used for generating a required frequency and phase shift angle; the VCO module is used for generating a sine wave of the required frequency; the comparison module is used for outputting a rectangular wave pulse of the required frequency on the basis of the sine wave; the phase shift module is used for generating a rectangular wave pulse of the required phase shift angle; and the mode switching module is used for completing control mode switching on the basis of the rectangular wave pulse of the required frequency and the rectangular wave pulse of the required phase shift angle. Under a normal operating condition, the conduction loss can be reduced, and the efficiency is higher. Under a light load condition, one phase is cut off to realize a similar two-phase full-bridge structure, so that the switching loss and the loss generated by a circulating current are reduced, and the light load efficiency is improved. By means of two-phase phase shift control, the voltage gain range is widened, the switching frequency required for realizing a wide voltage gain requirement is reduced, and the switching loss is reduced.
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Inventors:
GUO YINGJUN (CN)
SUN HEXU (CN)
ZHAO YUYANG (CN)
LI PENGCHENG (CN)
DONG WEICHAO (CN)
SUN HEXU (CN)
ZHAO YUYANG (CN)
LI PENGCHENG (CN)
DONG WEICHAO (CN)
Application Number:
PCT/CN2023/107920
Publication Date:
February 15, 2024
Filing Date:
July 18, 2023
Export Citation:
Assignee:
UNIV HEBEI SCIENCE & TECH (CN)
International Classes:
H02M3/335; H02M1/00; H02M3/00
Foreign References:
| CN115173714A | 2022-10-11 | |||
| CN114465481A | 2022-05-10 | |||
| CN107425722A | 2017-12-01 | |||
| CN107994777A | 2018-05-04 | |||
| US20130223103A1 | 2013-08-29 |
Other References:
DENG QINRUI, HE YINGJIE; LEI CHAO; LIU JINJUN: "PFM+PSM hybrid control of CLLLC resonant converter", DIANLI ZIDONGHUA SHEBEI / ELECTRIC POWER AUTOMATION EQUIPMENT, DIANLI ZIDONGHUA SHEBEI, JP, vol. 42, no. 2, 1 February 2022 (2022-02-01), JP , pages 148 - 154, XP093138804, ISSN: 1006-6047, DOI: 10.16081/j.epae.202110006
Attorney, Agent or Firm:
BEIJING DONGFANGSHENGFAN IP AGENCY CO., LTD. (CN)
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