Power converter for electric vehicle

    公开(公告)号:US10819218B2

    公开(公告)日:2020-10-27

    申请号:US16544989

    申请日:2019-08-20

    发明人: Hideki Maeda

    IPC分类号: H02P27/06 H02M1/32 H02M3/156

    摘要: A power converter for an electric vehicle that converts output of a battery to driving an electric traction motor is disclosed. The power converter may include: a power switching element; a current sensor provided on a bus bar in which an output current of the switching element flows; a cooler cooling the switching element; a temperature sensor measuring a temperature of a coolant; and a controller controlling the switching element. The controller may be configured to: estimate a temperature of the current sensor based on the temperature of the coolant; determine a first and second correction values for the estimated temperature based on the output current and an input voltage applied to the switching element; and restrict a load on the switching element when a corrected temperature, which is obtained by adding the first and second correction values to the estimated temperature, exceeds a predetermined temperature threshold.

    Electric vehicle
    5.
    发明授权

    公开(公告)号:US11046199B2

    公开(公告)日:2021-06-29

    申请号:US16568402

    申请日:2019-09-12

    发明人: Hideki Maeda

    摘要: An electric vehicle includes a main battery, a power converter, a relay, and a controller. The power converter is a device that converts power of the main battery to drive electric power for a motor. The power converter includes a voltage sensor that measures an input voltage. The relay is connected between the main battery and the power converter. The controller stores an output value of the voltage sensor as an offset value at time after a vehicle main switch is turned on and before the relay is closed. The controller controls the power converter based on a value acquired by subtracting the offset value from the output value of the voltage sensor after the relay is closed. The controller opens the relay when a value acquired by subtracting the offset value from the travel-time output value exceeds a first voltage threshold.