Abstract: The disclosure relates to a junction temperature calculation method for a power conversion module. The power conversion module includes a first switching device. The junction temperature calculation method includes: correcting a conduction loss of the first switching device, where the correction of the conduction loss is based on at least a first correction coefficient K1, and the first correction coefficient K1 is associated with a modulation ratio of the power conversion module; and calculating a junction temperature of the first switching device as a junction temperature of the power conversion module, where the calculation of the junction temperature of the first switching device is based on at least the corrected conduction loss. The disclosure also relates to a junction temperature calculation device for a power conversion module, a computer-readable storage medium, and a vehicle.

Abstract: The invention relates to a motor control method for a vehicle. The method includes: determining that a motor control unit (MCU) malfunctions; monitoring an output alternating current frequency of an electric motor; and controlling, based on the output alternating current frequency, the electric motor to switch between an active short circuit state and a safety pulse off state. The invention further relates to a motor control circuit for a vehicle, a motor drive system, and a vehicle.