Powertrain, control method, and hybrid electric vehicle
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsYankun Xu, Ningbo Feng, Xueliang Zhang
Life of this patent
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Abstract
A powertrain, a control method, and a hybrid electric vehicle. The powertrain includes a motor controller unit and a motor. The motor controller unit includes N bridge arms, and the motor includes N motor windings corresponding to the N bridge arms. Each of the N bridge arms includes a first end and a second end, the first end of each bridge arm is connected to a positive bus, the second end of each bridge arm is connected to a negative bus, a midpoint of each bridge arm is connected to one end of one motor winding, the other end of each of the N motor windings is connected to one end of a power battery, and the other end of the power battery is connected to the positive bus or the negative bus.
Claims20
A powertrain, the powertrain comprising:
- a motor controller unit (MCU) and a motor, the MCU comprises N bridge arms, and the motor comprises N motor windings corresponding to the N bridge arms, wherein N is greater than or equal to 2;
- each of the N bridge arms comprises a first end and a second end;
- the first end of each bridge arm is connected to a positive bus, the second end of each bridge arm is connected to a negative bus, and a midpoint of each bridge arm is connected to one end of one motor winding;
- and
- the other end of each of the N motor windings is connected to one end of a power battery, and the other end of the power battery is connected to the positive bus or the negative bus;
- a bus capacitor unit connected between the positive bus and the negative bus, wherein the MCU further comprises a controller, and the N bridge arms comprise at least one first bridge arm;
- and
- the at least one first bridge arm is configured to be turned on or off based on a first pulse width modulation (PWM) signal, wherein the first PWM signal is used to enable the bus capacitor unit to charge the power battery through a motor winding connected to the at least one first bridge arm;
- or the first PWM signal is used to enable the power battery to discharge through a motor winding connected to the at least one first bridge arm.
A control method of a powertrain, wherein the powertrain comprises a motor controller unit (MCU), a motor, and a bus capacitor unit connected between a positive bus and a negative bus;
- the MCU comprises N bridge arms, the N bridge arms comprise at least one first bridge arm;
- and the motor comprises N motor windings corresponding to the N bridge arms, wherein N is greater than or equal to 2;
- and
- the control method comprises:
- turning on or turning off the first bridge arm according to a first pulse width modulation (PWM) signal, so that the bus capacitor unit charges a power battery through a motor winding connected to the first bridge arm, or
- the power battery discharges through a motor winding connected to the first bridge arm.
A hybrid electric vehicle, wherein the hybrid electric vehicle comprises a power battery and a powertrain, wherein the powertrain comprises a motor controller unit (MCU) and a motor, wherein the motor in the powertrain is connected to the power battery, the MCU comprises N bridge arms, and the motor comprises N motor windings corresponding to the N bridge arms, wherein N is greater than or equal to 2;
- each of the N bridge arms comprises a first end and a second end;
- the first end of each bridge arm is connected to a positive bus, the second end of each bridge arm is connected to a negative bus, and a midpoint of each bridge arm is connected to one end of one motor winding;
- and
- the other end of each of the N motor windings is connected to one end of the power battery, and the other end of the power battery is connected to the positive bus or the negative bus
- a bus capacitor unit connected between the positive bus and the negative bus, wherein the MCU further comprises a controller, and the N bridge arms comprise at least one first bridge arm;
- and
- the at least one first bridge arm is configured to be turned on or off based on a first pulse width modulation (PWM) signal, wherein the first PWM signal is used to enable the bus capacitor unit to charge the power battery through a motor winding connected to the at least one first bridge arm;
- or the first PWM signal is used to enable the power battery to discharge through a motor winding connected to the at least one first bridge arm.
Dependencies are inferred from the claim text.