Title:
RESONANT CONVERTER, CONTROL METHOD THEREOF, AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/128661
Kind Code:
A1
Abstract:
Disclosed is a resonant converter, comprising: an input power source, a voltage dividing circuit, a multi-level switch network, a resonant unit, and a transformer. A cathode and an anode of the input power source are connected to both ends of the voltage dividing circuit, separately. Two input ends of the multi-level switch network are connected to both ends of the voltage dividing circuit, separately. A clamped neutral point of the multi-level switch network is connected to a neutral point of the voltage dividing circuit. The number of output levels at an output end of the multi-level switch network is greater than 3. One end of the resonant unit is connected to the output end of the multi-level switch network, and the other end of the resonant unit is connected to one end of a primary side of the transformer. The multi-level switch network enables, according to a control indication of a control device, the output end of the multi-level switch network to output square wave voltages of different amplitudes as input voltages of the resonant unit. The input voltage is used for adjusting a gain of the resonant converter. The solution provided by the present application can reduce the semiconductor switching loss during a low voltage output and improve the conversion frequency and load capacity of the resonant converter during the low voltage output.
Inventors:
ZHANG YANZHONG (CN)
MA ZHENG (CN)
SHI LEI (CN)
FU DIANBO (CN)
MA ZHENG (CN)
SHI LEI (CN)
FU DIANBO (CN)
Application Number:
PCT/CN2018/119386
Publication Date:
July 04, 2019
Filing Date:
December 05, 2018
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M3/335; H02M7/483
Foreign References:
| CN108566094A | 2018-09-21 | |||
| CN108258909A | 2018-07-06 | |||
| CN101728961A | 2010-06-09 | |||
| US20140198536A1 | 2014-07-17 | |||
| JP2015027169A | 2015-02-05 | |||
| CN201711418706A | 2017-12-25 |
Other References:
See also references of EP 3716461A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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