US 11,811,350 B2
Motor control system and motor control apparatus
Zhiyong Du, Shenzhen (CN); Luhui Xu, Shenzhen (CN); Yilong Yu, Shenzhen (CN); and Axi Qi, Shenzhen (CN)
Assigned to BYD COMPANY LIMITED, Shenzhen (CN)
Appl. No. 17/787,731
Filed by BYD COMPANY LIMITED, Shenzhen (CN)
PCT Filed Nov. 25, 2020, PCT No. PCT/CN2020/131440
§ 371(c)(1), (2) Date Jun. 21, 2022,
PCT Pub. No. WO2021/135738, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911417122.X (CN), filed on Dec. 31, 2019.
Prior Publication US 2023/0076368 A1, Mar. 9, 2023
Int. Cl. H02P 3/06 (2006.01); H02P 23/14 (2006.01)
CPC H02P 3/06 (2013.01) [H02P 23/14 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A motor control system, comprising a drive unit, a backup control unit, and a power unit, wherein
the drive unit is electrically connected to the power unit, and is configured to convert a received low-voltage drive signal into a high-voltage drive signal and output the high-voltage drive signal to the power unit, the power unit outputs, according to the high-voltage drive signal, a power supply drive signal provided by a high-voltage battery, and the power supply drive signal is configured to drive a motor connected to the power unit to rotate; and
the backup control unit is electrically connected to the drive unit, the drive unit is configured to output a diagnosis signal indicating a running status of the drive unit to the backup control unit, and if the diagnosis signal received by the backup control unit indicates that the drive unit is in a fault state, the backup control unit controls the drive unit to stop working, so that the drive unit stops outputting the high-voltage drive signal to the power unit, to control the motor to stop rotating,
wherein the motor control system further comprises a control unit;
the control unit is electrically connected to the drive unit, and is configured to output an enable signal and the low-voltage drive signal to the drive unit, and the enable signal is used for controlling the drive unit to start or stop converting the low-voltage drive signal into the high-voltage drive signal; and
when a fault occurs, the drive unit outputs a fault signal to the control unit, the fault signal is used for indicating that the drive unit is in the fault state, and the control unit stops, according to the fault signal, outputting the low-voltage drive signal, and adjusts a potential of the enable signal, to control the drive unit to stop outputting the high-voltage drive signal.