DISCHARGE DEVICE FOR DC BUS CAPACITOR AND METHOD THEREOF, ELECTRICAL DEVICE AND STORAGE MEDIUM

WIPO Patent Application WO/2024/082132

A1

Embodiments of the present invention disclosea device for DC bus capacitor and method thereof, electrical device and storage medium. The device comprising: a resistor, connected in series with a DC bus capacitor of a converter; a braking IGBT, connected between a positive electrode (DCP) and a negative electrode (DCN) of the DC bus capacitor; a switch, which is respectively connected to the braking IGBT and the resistor; anda control unit, configured to turn on the braking IGBT when detecting that a power supply system of the converter is powered off, and control a state of the switch to conduct a discharging circuit of the DC bus capacitor, the discharging circuit comprising the resistor and the braking IGBT. When it is detected that the power supply system of the converter is powered off, the braking IGBT is reused to realize rapid discharge of the DC bus capacitor, thus reducing the discharge time.

CHEN, Xiao Long (Yuhua DistrictNanjing, Jiangsu 9, CN)
HUANG, Qing Li (No. 4 KangjuyuanWanfu Road, Dongshan Street, Jiangning Distric, Nanjing Jiangsu 3, CN)
LI, Peng Cheng (Siemens Road Jiangning Development Zon, Nanjing Jiangsu 0, CN)
XU, Yu (Building 15No. 53 Changting Street, Jiangning Distric, Nanjing Jiangsu 0, CN)
LU, Yan Hua (No. 6 BlocksCui Lake Garden, Moning Street, Jiangning Distric, Nanjing Jiangsu 0, CN)

PCT/CN2022/125911

April 25, 2024

October 18, 2022

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SIEMENS AKTIENGESELLSCHAFT (Munchen, DE)
SIEMENS LTD., CHINA (Chaoyang District, Beijing 2, CN)

H02J7/00; H02M1/32; H02M7/48

KANGXIN PARTNERS, P.C. (Tower A InDo Building,A48 Zhichun Road,Haidian District, Beijing 8, CN)

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