Motor control unit, electric drive system, powertrain, and electric vehicle

A motor control unit, wherein an input of the motor control unit is connected to a power battery pack of an electric vehicle, an output of the motor control unit is connected to a three-phase motor, the motor control unit comprising:

• a power transmission interface, an inverter circuit, a switch circuit, a first direct current switch, a second direct current switch, and a controller, wherein, a first terminal of the power transmission interface is connected to a first input terminal of the inverter circuit by using the first direct current switch, and a second terminal of the power transmission interface is connected to a first terminal of the switch circuit;
• wherein, the switch circuit comprises three switch branches, wherein first terminals of the three switch branches are connected to the first terminal of the switch circuit, second terminals of the three switch branches are respectively connected to one-phase output terminals of the inverter circuit, and each switch branch comprises a separately controlled controllable switch;
• the first input terminal of the inverter circuit is connected to the power battery pack using the second direct current switch;
• and
• the controller is configured to control the first direct current switch, the second direct current switch, the controllable switch, and the inverter circuit, such that a power supply charges the power battery pack, when the power transmission interface is connected to the power supply, and the power battery pack discharges electricity into a load when the power transmission interface is connected to the load.