US 12,077,224 B2
Motor control device and electric power steering device
Haruna Koyama, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/795,096
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed May 7, 2020, PCT No. PCT/JP2020/018508
§ 371(c)(1), (2) Date Jul. 25, 2022,
PCT Pub. No. WO2021/224958, PCT Pub. Date Nov. 11, 2021.
Prior Publication US 2023/0322295 A1, Oct. 12, 2023
Int. Cl. B62D 5/04 (2006.01); H02K 16/02 (2006.01); H02P 21/22 (2016.01); H02P 25/22 (2006.01); H02P 27/08 (2006.01)
CPC B62D 5/0472 (2013.01) [H02K 16/02 (2013.01); H02P 21/22 (2016.02); H02P 25/22 (2013.01); H02P 27/08 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A motor control device that drives a motor including a first motor winding and a second motor winding, wherein
the motor control device includes a first controller that drives the first motor winding and a second controller that drives the second motor winding, each of the first controller and the second controller includes a motor driving circuitry and a control circuitry to which a power supply voltage is supplied,
the first controller and the second controller acquire the power supply voltage of the other controller, each of the control circuitries includes a power supply voltage selection circuitry having a minimum value selection circuitry and a d-axis target current computation circuitry,
the minimum value selection circuitry selects the lower of a value of an own power supply voltage input into the power supply voltage selection circuitry and a value of the power supply voltage of the other controller, and outputs the selected value from the power supply voltage selection circuitry as a post-selection power supply voltage,
the post-selection power supply voltage is input into the d-axis target current computation circuitry, and the d-axis target current computation circuitry outputs a target d-axis current using the post-selection power supply voltage.