METHOD FOR OPERATING AN INVERTER DEVICE OF AN ELECTRIC DRIVE DEVICE, CONTROL UNIT, ELECTRIC DRIVE DEVICE AND MOTOR VEHICLE

An inverter device of an electric drive device may be configured to convert a direct voltage of an intermediate circuit of the electric drive device into a multi-phase alternating current to operate an electric motor of the electric drive device. A safety signal may be received by a control unit of the electric drive device, which instructs the control unit to operate the electric motor in a safe operating mode and to discharge the intermediate circuit at same time. If an active short circuit mode is preset, the inverter device is controlled to operate the electric motor in the active short circuit mode and to discharge the intermediate circuit in the discharge mode. If a freewheel mode is preset, the inverter device is controlled to operate the electric motor in the freewheel mode and, upon satisfaction of a current criterion, controlled to discharge the intermediate circuit in the discharge mode.