Title:
POWER SUPPLY CIRCUIT AND POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/155898
Kind Code:
A1
Abstract:
The present application belongs to the technical field of circuits, and discloses a power supply circuit and device. The power supply circuit comprises a transformer T and a switching circuit. The transformer T comprises a primary winding, a first secondary winding, and a second secondary winding. The first secondary winding comprises a secondary winding N1 and a secondary winding N2 which are connected in series. The second secondary winding comprises a secondary winding N3 and a secondary winding N4 which are connected in series. When a mains voltage changes, the power supply circuit changes the connection manner between the first secondary winding and the second secondary winding of the transformer T by means of the switching circuit, so that the voltage outputted by the power supply circuit to a load circuit remains unchanged. Therefore, the power supply circuit can keep the voltage outputted by the power supply circuit to the load circuit unchanged, without adjusting the duty ratio of the transformer T, thereby increasing the efficiency of the power supply circuit outputting electric energy.
Inventors:
LI ZHIGANG (CN)
WANG YIXIAN (CN)
WANG YIXIAN (CN)
Application Number:
PCT/CN2021/073331
Publication Date:
July 28, 2022
Filing Date:
January 22, 2021
Export Citation:
Assignee:
SHENZHEN JASIC TECH CO LTD (CN)
International Classes:
H01F29/02
Foreign References:
| CN101471174A | 2009-07-01 | |||
| CN101969226A | 2011-02-09 | |||
| CN104578798A | 2015-04-29 | |||
| CN208638265U | 2019-03-22 | |||
| US20110157945A1 | 2011-06-30 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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