Title:
POWER SUPPLY CIRCUIT WITHOUT CHARGING LOOP, AND POWER MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/077975
Kind Code:
A1
Abstract:
Provided are a power supply circuit without a charging loop, and a power management system. The power supply circuit comprises an alternating-current switch component, a photovoltaic switch component and a direct-current bus capacitor, wherein the alternating-current switch component is used for connecting a live wire of a three-phase alternating current to a direct-current bus, and controlling, when the alternating current is selected to charge the direct-current bus capacitor, the voltage across the two ends of the direct-current bus capacitor to gradually rise to a target voltage; the photovoltaic switch component is used for connecting a photovoltaic power supply to the direct-current bus, and controlling, when the photovoltaic power supply is selected to charge the direct-current bus capacitor, the voltage across the two ends of the direct-current bus capacitor to gradually rise to the target voltage; and the direct-current bus capacitor is connected between a positive electrode and a negative electrode of the direct-current bus. When an alternating current or a photovoltaic power supply is connected to a direct-current bus, an alternating-current switch component or a photovoltaic switch component can control the voltage across two ends of a direct-current bus capacitor to stably rise to a target voltage, thereby preventing damage to components on the direct-current bus caused by a large impact current generated by a rapid rise of the voltage across the two ends of the direct-current capacitor.
Inventors:
WANG JING (CN)
HUANG MENG (CN)
FENG SHANGXIAN (CN)
FANG MINGZHAO (CN)
CUI CHENGHAO (CN)
SHENG MINGQIANG (CN)
HUANG MENG (CN)
FENG SHANGXIAN (CN)
FANG MINGZHAO (CN)
CUI CHENGHAO (CN)
SHENG MINGQIANG (CN)
Application Number:
PCT/CN2021/105766
Publication Date:
April 21, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)
International Classes:
H02J7/02; H02J7/35
Foreign References:
| CN112271800A | 2021-01-26 | |||
| CN111313676A | 2020-06-19 | |||
| EP3349343A1 | 2018-07-18 | |||
| CN110690813A | 2020-01-14 | |||
| CN201830136U | 2011-05-11 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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