Title:
MODULE OVERVOLTAGE PROTECTION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2024/078480
Kind Code:
A1
Abstract:
Provided is a module overvoltage protection circuit, which relates to the technical field of voltage direct current transmission. The module overvoltage protection circuit comprises: a bridge structure module, the bridge structure module comprising multiple power devices and anti-parallel diodes thereof; a direct-current energy storage capacitor, the direct-current energy storage capacitor being connected in parallel with the bridge structure module; and an overvoltage protection circuit, the overvoltage protection circuit being connected between a positive electrode of the direct-current energy storage capacitor and a gate electrode of a power device, and the overvoltage protection circuit comprising multiple groups of first transient voltage suppression diodes and first isolation diodes which are connected in series. After a basis for an overvoltage determination is directly obtained from the direct-current energy storage capacitor, a short-circuit protection device is triggered to be switched on, to implement a module overvoltage protection function; this improves the problem of over-voltage protection refusal of a power device while not affecting an original working state of the circuit, and also reduces misoperation risk.
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Inventors:
XIE YEYUAN (CN)
YANG CHEN (CN)
DUAN JUN (CN)
JIANG TIANGUI (CN)
YAO HONGYANG (CN)
YIN GUANXIAN (CN)
YANG CHEN (CN)
DUAN JUN (CN)
JIANG TIANGUI (CN)
YAO HONGYANG (CN)
YIN GUANXIAN (CN)
Application Number:
PCT/CN2023/123705
Publication Date:
April 18, 2024
Filing Date:
October 10, 2023
Export Citation:
Assignee:
NR ELECTRIC CO LTD (CN)
NR ENG CO LTD (CN)
NR ELECTRIC POWER ELECTRONICS CO LTD (CN)
NR ENG CO LTD (CN)
NR ELECTRIC POWER ELECTRONICS CO LTD (CN)
International Classes:
H02M1/32; H02H7/12; H02H9/04; H02M1/088
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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