The invention generally relates to the technical field of power electronics, in particular to a bus capacitor discharging system, a bus capacitor discharging method and a frequency converter. The bus capacitor discharge system according to one aspect of the present application comprises: a power conversion device coupled with a bus capacitor and comprising one or more bridge arms, each of the one or more bridge arms comprising one or more power switching devices and an inductance device; and the control device is configured to respond to a discharge control signal to control one bridge arm in the one or more bridge arms to be in a micro-conduction state, so that the bridge arm in the micro-conduction state and the bus capacitor form a discharge loop to perform discharge operation on the bus capacitor.

    本申请总体上涉及电力电子技术领域,并且更具体地涉及一种母线电容放电系统、母线电容放电方法及变频器。按照本申请一个方面的母线电容放电系统包括:功率变换装置,其与母线电容耦合并且包括一个或多个桥臂,所述一个或多个桥臂中的每个桥臂包括一个或多个功率开关器件以及电感器件;以及控制装置,其配置成响应于放电控制信号而控制所述一个或多个桥臂中的一个桥臂处于微导通状态,以通过处于所述微导通状态的所述桥臂与所述母线电容形成放电回路来对所述母线电容执行放电操作。


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    Title :

    Bus capacitor discharging system, bus capacitor discharging method and frequency converter


    Additional title:

    母线电容放电系统、母线电容放电方法及变频器


    Contributors:
    LIU JIAN (author) / HONG WENCHENG (author) / JIN JIAHANG (author) / DAI JIANSHAN (author) / HUANG JIANGANG (author) / SU XIEZU (author)

    Publication date :

    2023-07-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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