US 11,984,831 B2
Motor control unit and power system
Ningbo Feng, Xi'an (CN); and Chunyang Liu, Xi'an (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on May 24, 2022, as Appl. No. 17/752,512.
Application 17/752,512 is a continuation of application No. PCT/CN2020/089569, filed on May 11, 2020.
Claims priority of application No. 201911167478.2 (CN), filed on Nov. 25, 2019.
Prior Publication US 2022/0286078 A1, Sep. 8, 2022
Int. Cl. H02P 29/028 (2016.01); H02P 25/22 (2006.01); H02P 27/08 (2006.01)
CPC H02P 29/028 (2013.01) [H02P 25/22 (2013.01); H02P 27/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for controlling a motor, comprising:
a controller; and
at least two drive circuits: a first drive circuit and a second drive circuit,
wherein a type of a power component in the first drive circuit is different from a type of a power component in the second drive circuit, a loss of the power component in the first drive circuit is greater than a loss of the power component in the second drive circuit, and a current withstand capability of the power component in the first drive circuit is greater than a current withstand capability of the power component in the second drive circuit,
wherein the first drive circuit is configured to invert a first direct current output by a corresponding first direct current power supply into a first alternating current, and supply the first alternating current to a first part of windings of the motor,
wherein the second drive circuit is configured to invert a second direct current output by a corresponding second direct current power supply into a second alternating current, and supply the second alternating current to a second part of the windings of the motor, and
wherein the controller is configured to:
in response to determining that a load of the motor is less than a preset load, control the first drive circuit to stop working and control the second drive circuit to start to work; or
in response to determining that the load of the motor is greater than or equal to the preset load, control both the first drive circuit and the second drive circuit to start to work.