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    POWER CONVERSION DEVICE
    4.
    发明公开
    POWER CONVERSION DEVICE 审中-实审

    公开(公告)号：EP4425776A1

    公开(公告)日：2024-09-04

    申请号：EP24160879.3

    申请日：2024-03-01

    申请人： Huawei Digital Power Technologies Co., Ltd.

    发明人： ZHAN, Jinxiang ,  GAO, Kai ,  WANG, Juncan ,  GAO, Yongbing

    IPC分类号： H02M1/32 ,  H02M1/14 ,  H02M3/06 ,  H02M3/155 ,  H02M3/158 ,  H02M7/48

    CPC分类号： H02M1/007 ,  H02M1/32 ,  H02M3/155 ,  H02M3/158 ,  H02M3/06 ,  H02M7/48 ,  H02M1/14 ,  H02M1/342

    摘要： This application provides a power conversion device. The power conversion device includes a positive direct current bus, a negative direct current bus, a first capacitor, a second capacitor, a first inductor, a first discharge unit, and an inverter circuit. An input terminal of the inverter circuit is connected to an input terminal of the power conversion device separately by using the positive direct current bus and the negative direct current bus, and an output terminal of the inverter circuit is connected to an output terminal of the power conversion device. The first capacitor is connected between the positive direct current bus and the negative direct current bus. The second capacitor is connected in series to the first inductor and then connected in parallel to the first capacitor, where a capacitance value of the second capacitor is greater than a capacitance value of the first capacitor. The first discharge unit is connected in parallel to the first inductor, and is configured to be in a conducted state when a voltage of the first inductor is greater than a first action voltage threshold. According to this application, a case in which a semiconductor device in the power conversion device has a risk of voltage overstress caused by a differential mode lightning strike current can be avoided.

    METHOD AND SYSTEM FOR CONTROLLING A SWITCHING POWER SUPPLY
    6.
    发明公开
    METHOD AND SYSTEM FOR CONTROLLING A SWITCHING POWER SUPPLY 审中-公开

    公开(公告)号：EP4340201A1

    公开(公告)日：2024-03-20

    申请号：EP23196725.8

    申请日：2023-09-12

    申请人： Delta Electronics (Shanghai) Co., Ltd.

    发明人： WANG, Xiaolei

    IPC分类号： H02M1/42 ,  H02M1/14 ,  H02M1/32 ,  H02M1/36 ,  H02M1/00

    摘要： The present disclosure discloses a method and a system for controlling a switching power supply, the switching power supply comprising a power factor correction circuit which comprises at least one electrolytic capacitor, the method comprising: detecting a ripple voltage of the electrolytic capacitor; controlling an actual output power of the switching power supply to be equal to a reference output power based on the ripple voltage of the electrolytic capacitor, wherein the reference output power equals to a compensated output power or an upper limit output power, and wherein the compensated output power is obtained by comparing the ripple voltage of the electrolytic capacitor with a reference voltage and subjecting to a compensation calculation. The reference output power is a smaller one of the compensated output power and the upper limit output power.