Login| Sign Up| Help| Contact|

Patent Searching and Data


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)
Application Number:
PCT/CN2021/105766
Publication Date:
April 21, 2022
Filing Date:
July 12, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)
International Classes:
H02J7/02; H02J7/35
Foreign References:
CN112271800A2021-01-26
CN111313676A2020-06-19
EP3349343A12018-07-18
CN110690813A2020-01-14
CN201830136U2011-05-11
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
Download PDF: