US 2024/0283385 A1Published application

Motor drive system, charging method and vehicle

AssigneeHuawei Digital Power Technologies Co., Ltd.

InventorsYing Li, Chaojie Shi, Ningbo Feng, Zhenxing Chen, Xian Luo

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Abstract

This application provides a motor drive system, a vehicle, a charging method, a control apparatus, and a medium, to improve motor performance in a vehicle charging process. The motor drive system may include a plurality of bridge arms, a motor, and a control module. The motor includes a plurality of windings. A second end of a first switch in a first bridge arm in the plurality of bridge arms is coupled to a first electrode of a power supply, and a second electrode of the power supply is coupled to a power battery. The control module is configured to: obtain a rotor position angle of the motor; and control a bridge arm other than the first bridge arm in the plurality of bridge arms in a control manner corresponding to the rotor position angle, to enable the power supply to charge the power battery.

Claims18

Dependent claims

A motor drive system, comprising:

a plurality of bridge arms;
a motor;
and
a controller;
wherein each bridge arm of the plurality of bridge arms comprises a first switch and a second switch, a first end of the first switch is coupled to a first electrode of a power battery, a second end of the first switch is coupled to a first end of the second switch, and a second end of the second switch is coupled to a second electrode of the power battery;
wherein the motor comprises a plurality of windings, the plurality of windings are in one-to-one correspondence with the plurality of bridge arms, a first end of each winding of the plurality of windings is coupled to a common endpoint, and a second end of each winding of the plurality of windings is coupled to a second end of a first switch in a corresponding bridge arm;
wherein a second end of a first switch in a first bridge arm in the plurality of bridge arms is coupled to a first electrode of a power supply, and a second electrode of the power supply is coupled to the power battery;
and
wherein the controller is configured to:
obtain a rotor position angle of the motor;
and
control a bridge arm other than the first bridge arm in the plurality of bridge arms in a control manner corresponding to the rotor position angle, to enable the power supply to charge the power battery.

9 more elements

A charging method, applied to a motor drive system that includes a plurality of bridge arms and a motor, the method comprising:

obtaining a rotor position angle of the motor, wherein each bridge arm of the plurality of bridge arms comprises a first switch and a second switch, a first end of the first switch is coupled to a first electrode of a power battery, a second end of the first switch is coupled to a first end of the second switch, and a second end of the second switch is coupled to a second electrode of the power battery, wherein the motor comprises a plurality of windings, the plurality of windings are in one-to-one correspondence with the plurality of bridge arms, a first end of each winding of the plurality of windings is coupled to a common endpoint, and a second end of each winding of the plurality of windings is coupled to a second end of a first switch in a corresponding bridge arm, and wherein a second end of a first switch in a first bridge arm in the plurality of bridge arms is coupled to a first electrode of a power supply, and a second electrode of the power supply is coupled to the power battery;
and
controlling a bridge arm other than the first bridge arm in the plurality of bridge arms in a control manner corresponding to the rotor position angle, to enable the power supply to charge the power battery.

An electric vehicle comprising a motor drive system, wherein the motor drive system comprises a plurality of bridge arms, a motor, and a controller;

wherein each bridge arm of the plurality of bridge arms comprises a first switch and a second switch, a first end of the first switch is coupled to a first electrode of a power battery, a second end of the first switch is coupled to a first end of the second switch, and a second end of the second switch is coupled to a second electrode of the power battery;
wherein the motor comprises a plurality of windings, the plurality of windings are in one-to-one correspondence with the plurality of bridge arms, a first end of each winding of the plurality of windings is coupled to a common endpoint, and a second end of each winding of the plurality of windings is coupled to a second end of a first switch in a corresponding bridge arm;
wherein a second end of a first switch in a first bridge arm in the plurality of bridge arms is coupled to a first electrode of a power supply, and a second electrode of the power supply is coupled to the power battery;
and
wherein the controller is configured to:
obtain a rotor position angle of the motor;
and
control a bridge arm other than the first bridge arm in the plurality of bridge arms in a control manner corresponding to the rotor position angle, to enable the power supply to charge the power battery.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/650,766Filed 30 Apr 2024
Priority: CN 202111283782.01 Nov 2021
Published: 22 Aug 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

B60L 53/24
Characterised by converters located in the vehicle: using the vehicle's propulsion converter for charging
H02P 27/085
With pulse width modulation: wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
B60L 15/007
Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles: physical arrangements or structures of…
B60L 15/08
Characterised by the form of the current used in the control circuit: using pulses