The invention discloses integrated precharging and discharging for electric vehicle drive system capacitors. A shared resistor performs precharging and discharging functions of capacitors in an electric vehicle drive system. In a precharge state, the shared resistor is connected between the capacitors and a DC source via a precharge relay. In a discharge state, the resistor is connected across thecapacitors via a discharge transistor. Otherwise, the resistor is disconnected. A bypass switch is connected between the resistor and an input capacitor. The bypass switch is rendered conductive during the precharge state and during the discharge state. The discharge transistor is activated only during the discharge state. As a result, the invention uses less components by virtue of eliminating separate resistance elements for pre-charging and discharging and by eliminating discharge switches dedicated to separate resistances. The circuit integration and the placement of components outside the inverter module improves overall system cost and packaging size.

    本公开提供“用于电动车辆驱动系统电容器的集成式预充电和放电”。一种共享电阻器执行电动车辆驱动系统中的电容器的预充电和放电功能。在预充电状态下,共享电阻器经由预充电继电器连接在电容器和DC电源之间。在放电状态下,电阻器经由放电晶体管跨接在电容器上。否则,电阻器断开。旁路开关连接在电阻器和输入电容器之间。在预充电状态期间和在放电状态期间,旁路开关导电。放电晶体管仅在放电状态期间被激活。因此,本发明通过消除用于预充电和放电的单独的电阻元件并且通过消除专用于单独的电阻的放电开关而使用更少的部件。电路集成和在逆变器模块外部的部件的放置改善了整体系统成本和封装大小。


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    Title :

    INTEGRATED PRECHARGING AND DISCHARGING FOR ELECTRIC VEHICLE DRIVE SYSTEM CAPACITORS


    Additional title:

    用于电动车辆驱动系统电容器的集成式预充电和放电


    Contributors:
    CURUVIJA BORIS (author) / XU FAN (author) / CHEN LIHUA (author) / GE BAOMING (author)

    Publication date :

    2020-04-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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