Title:
SWITCHING CIRCUIT, POWER SUPPLY DEVICE, AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/151653
Kind Code:
A1
Abstract:
The present application relates to a switching circuit, a power supply device, and an electrical device. The switching circuit comprises a current-limiting component, a switch component, a rectifying circuit, and a voltage stabilizing circuit; the switch component comprises a controlling device and a controlled device; one end of the current-limiting component is connected to a first interface of an alternating-current power supply, and the other end of the current-limiting component is connected to a first alternating-current side of the rectifying circuit by means of the controlled device; the controlling device is connected in parallel with the current-limiting component; the second alternating-current side of the rectifying circuit is connected to a second interface of the alternating-current power supply; a direct-current side of the rectifying circuit is connected to the voltage stabilizing circuit; the voltage stabilizing circuit is adapted to be connected to a load. The controlling device is configured to control the controlled device to be turned off when an output voltage of the alternating-current power supply is greater than or equal to a preset critical point. The controlling device is further configured to control the controlled device to be turned off when the output voltage of the alternating-current power supply is less than the preset critical point, and enable the alternating-current power supply to access the alternating-current side of the rectifying circuit. The voltage stabilizing circuit performs energy storage according to a direct current output by the direct current side of the rectifying circuit. The switching circuit can improve the energy utilization rate.
Inventors:
LI PENG (CN)
ZHANG JIAMING (CN)
TIAN BING (CN)
ZHAO JIGUANG (CN)
YIN XU (CN)
LIU ZHONG (CN)
SUN HONGDI (CN)
WANG ZHIMING (CN)
ZHOU FENG (CN)
LI LICHENG (CN)
ZHANG JIAMING (CN)
TIAN BING (CN)
ZHAO JIGUANG (CN)
YIN XU (CN)
LIU ZHONG (CN)
SUN HONGDI (CN)
WANG ZHIMING (CN)
ZHOU FENG (CN)
LI LICHENG (CN)
Application Number:
PCT/CN2021/100933
Publication Date:
July 21, 2022
Filing Date:
June 18, 2021
Export Citation:
Assignee:
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INSTITUTE CO LTD (CN)
International Classes:
H02M7/02; H02M7/04
Domestic Patent References:
| WO2017052553A1 | 2017-03-30 |
Foreign References:
| CN109412117A | 2019-03-01 | |||
| CN2882120Y | 2007-03-21 | |||
| CN214045464U | 2021-08-24 | |||
| CN2293146Y | 1998-09-30 | |||
| US20170026031A1 | 2017-01-26 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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