Title:
OVERVOLTAGE PROTECTION CIRCUIT AND METHOD, AND POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/032118
Kind Code:
A1
Abstract:
The present application discloses an overvoltage protection circuit and method, and a power supply system. The overvoltage protection circuit comprises: a voltage monitoring circuit configured to output a thyristor gating signal to a thyristor when detecting that overvoltage occurs at a voltage detection point, wherein the thyristor gating signal is used for controlling the thyristor to be switched on; a first resistor and a second resistor connected in series between a direct-current power supply end and a power supply end of a power source control chip, wherein the direct-current power supply end is used for supplying a holding current for the thyristor when the thyristor is switched on, so as to ensure that the thyristor is reliably switched on; the thyristor having a cathode grounded and an anode connected to a midpoint between the first resistor and the second resistor; and an energy storage module having a first end grounded and a second end connected to the midpoint between the first resistor and the second resistor, wherein the energy storage module is configured to discharge by means of the thyristor when the thyristor is reliably switched on, so as to cut off power supply output of the power source control chip.
Inventors:
LIU YANG (CN)
LIU YAN (CN)
ZHANG XIAOMIN (CN)
WANG WEI (CN)
WANG XIAOWEI (CN)
LIU YAN (CN)
ZHANG XIAOMIN (CN)
WANG WEI (CN)
WANG XIAOWEI (CN)
Application Number:
PCT/CN2023/098418
Publication Date:
February 15, 2024
Filing Date:
June 05, 2023
Export Citation:
Assignee:
SUZHOU INOVANCE CONTROL TECH CO LTD (CN)
International Classes:
H02H3/20; H02H7/18
Foreign References:
| CN115207876A | 2022-10-18 | |||
| CN205231714U | 2016-05-11 | |||
| CN208849440U | 2019-05-10 | |||
| US20190372333A1 | 2019-12-05 |
Other References:
HUANG LANQING, ZU GUOJIAN, CAO SHENGNAN: "The Improvement and Application of the Controlled System of the Constant Current and Constant Voltage", JOURNAL OF TAIYUAN NORMAL UNIVERSITY (NATURAL SCIENCE EDITION), CN, vol. 7, no. 1, 25 March 2008 (2008-03-25), CN, pages 99 - 102, 112, XP009552524, ISSN: 1672-2027
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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