Title:
SOFT START CIRCUIT AND POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/121305
Kind Code:
A1
Abstract:
The present disclosure provides a soft start circuit and a power supply circuit. The soft start circuit is disposed between a negative electrode of a direct current bus capacitor and a negative terminal of a direct current power supply, so as to control, after a start begins, according to the current input by the direct current bus capacitor in a constant current module, whether to electrically connect the direct current power supply and the direct current bus capacitor; one end of the soft start circuit is further connected to a filtering protection module, so as to control, at the beginning of the start, according to the voltage output by the filtering protection module, the direct current power supply to be electrically connected to the direct current bus capacitor. By means of the present disclosure, when the current input by the direct current bus capacitor is too large, the direct current power supply can be controlled to be disconnected from the direct current bus capacitor; a soft start is implemented only by means of the soft start circuit, the circuit is simple in structure, a complex control program is not required, and then the control efficiency is improved.
Inventors:
HU QIGUI (CN)
YUAN KE (CN)
LI WEIJIN (CN)
ZHENG XUEYUN (CN)
YUAN KE (CN)
LI WEIJIN (CN)
ZHENG XUEYUN (CN)
Application Number:
PCT/CN2021/105673
Publication Date:
June 16, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)
International Classes:
H02M1/36; H02H3/087; H02M1/32; H02M3/335; H05B45/30
Foreign References:
| CN112510985A | 2021-03-16 | |||
| CN104426126A | 2015-03-18 | |||
| CN207368636U | 2018-05-15 | |||
| CN206332447U | 2017-07-14 |
Other References:
See also references of EP 4167456A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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