Title:
ISOLATED AC-DC CONVERTER, CHARGING DEVICE, AND POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/001124
Kind Code:
A1
Abstract:
The present application discloses an isolated AC-DC converter, a charging device, and a power supply system. The isolated AC-DC converter comprises: a PFC filter, wherein an input end of the PFC filter is connected to an alternating current; a PFC circuit, wherein an input end of the PFC circuit is connected to an output end of the PFC filter, and an output end of the PFC circuit is connected to an input end of a DC-DC circuit; and the DC-DC circuit, comprising a transformer, wherein the transformer comprises: a primary winding, a secondary winding, and a first shielding layer; the first shielding layer is arranged between the primary winding and the secondary winding; the first shielding layer is connected to the PFC filter for preventing an interference signal from being transmitted to the secondary winding. In order to prevent an interference source from being transmitted to the secondary winding by means of the primary winding, the interference signal of the primary winding of the transformer is transmitted back to the PFC filter by means of the first shielding layer to form a common-mode loop for preventing the interference signal from being transmitted to the secondary winding. According to the solution, an EMC filter does not need to be additionally arranged, a shielding layer is additionally arranged, the implementation is easy, and the size and the volume are not greatly increased.
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Inventors:
ZHUANG JIACAI (CN)
XU JUN (CN)
XU JUN (CN)
Application Number:
PCT/CN2022/142477
Publication Date:
January 04, 2024
Filing Date:
December 27, 2022
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD (CN)
International Classes:
H02M1/44; H02M1/00; H02M1/42; H02M7/217; H02M7/219
Foreign References:
| CN114928241A | 2022-08-19 | |||
| CN103310956A | 2013-09-18 | |||
| CN203301179U | 2013-11-20 | |||
| EP4009338A1 | 2022-06-08 | |||
| US20140268968A1 | 2014-09-18 | |||
| CN110224582A | 2019-09-10 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW CO., LTD. (CN)
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