Power switching device
    8.
    发明授权
    Power switching device 有权
    电源开关装置

    公开(公告)号:US06853232B2

    公开(公告)日:2005-02-08

    申请号:US10446998

    申请日:2003-05-27

    CPC分类号: H03K17/0822 H03K17/166

    摘要: A power switching device has a power switching transistor connected in series in a load circuit with an inductive load portion and a commutation circuit. The commutation circuit is connected in parallel with the gate-drain or base-collector path of the power transistor and has a first Zener diode, which determines the commutation clamping voltage for switching on the power switching transistor during commutation, and an oppositely biased normal diode that is connected in series with the first Zener diode. The commutation circuit further has control elements in order to reduce, during a short time, the commutation clamping voltage at the beginning of each commutation cycle or after an adjustable delay from the beginning of each commutation cycle.

    摘要翻译: 功率开关器件具有串联连接在具有感性负载部分和换向电路的负载电路中的功率开关晶体管。 换向电路与功率晶体管的栅极 - 漏极或基极 - 集电极路并联连接,并具有第一齐纳二极管,其确定换向期间切换功率开关晶体管的换向钳位电压,以及相反偏置的正常二极管 它与第一个齐纳二极管串联连接。 换向电路还具有控制元件,以便在短时间内在每个换向循环开始时或在从每个换向循环开始之后的可调延迟之后减少换向钳位电压。