Motor control unit, power train, control method, and electric vehicle
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsChaojie Shi, Chaoqiang Wu, Shankai Chen
Life of this patent
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Abstract
This application discloses a motor control unit, a power train, a control method, and an electric vehicle, and relates to the field of electric vehicle technologies. An input end of the motor control unit connects to a power battery pack, an output end of the motor control unit connects to three phases of motor windings of a motor, and the motor control unit includes an inverter circuit and a controller. The controller is configured to control the inverter circuit to simultaneously output currents to the three phases of motor windings, and control the currents input to all the phases of motor windings to sequentially reach a preset current.
Claims18
A motor control unit, wherein an input end of the motor control unit is configured to connect to a power battery pack, an output end of the motor control unit is configured to connect to a motor winding of a three phase motor, and the motor control unit comprises:
- an inverter circuit, wherein an input end of the inverter circuit is the input end of the motor control unit, and each phase of an output end of the inverter circuit connects to a respective phase of the motor winding of the three phase motor;
- and
- a controller that is configured to:
- determine an amplitude and a phase of an input current of each phase of the motor winding based on a preset position angle and a preset current, wherein the preset position angle represents an angle between the preset current and a direct (d) axis of the three phase motor,
- control the inverter circuit to simultaneously output currents to the motor winding, and
- control the currents input to all phases of the motor winding to sequentially reach the preset current.
A control method for a motor control unit comprising an inverter circuit and a controller, wherein an input end of the inverter circuit is an input end of the motor control unit, and is configured to connect to a power battery pack, each phase of output end of the inverter circuit connects to each phase of a motor winding of a three phase motor, and the control method comprises:
- determining a preset current used by all phases of the motor winding to heat the power battery pack;
- determining an amplitude and a phase of an input current of each phase of the motor winding based on a preset position angle and the preset current, wherein the preset position angle represents an angle between the preset current and a direct (d) axis of the three phase motor;
- and
- controlling the inverter circuit to simultaneously output currents to the three phases of the motor winding;
- and
- controlling the currents input to all phases of the motor winding to sequentially reach the preset current.
Dependencies are inferred from the claim text.