US 11,942,889 B2
Motor control device
Shinyu Ko, Hitachinaka (JP); Kohei Myoen, Hitachinaka (JP); and Eigo Kishimoto, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/417,311
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Dec. 12, 2019, PCT No. PCT/JP2019/048612
§ 371(c)(1), (2) Date Jun. 22, 2021,
PCT Pub. No. WO2020/137567, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-247785 (JP), filed on Dec. 28, 2018.
Prior Publication US 2022/0077795 A1, Mar. 10, 2022
Int. Cl. H02P 6/08 (2016.01); B60L 15/20 (2006.01); B60L 53/20 (2019.01); B60L 58/12 (2019.01); B60L 58/18 (2019.01)
CPC H02P 6/08 (2013.01) [B60L 15/20 (2013.01); B60L 53/20 (2019.02); B60L 58/12 (2019.02); B60L 58/18 (2019.02); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A motor control device comprising:
an inverter which supplies U-phase, V-phase, and W-phase currents to a motor;
a torque limit calculation unit which calculates a torque limit from a current limit of a secondary battery that supplies a DC current to the inverter;
a first torque calculation unit which calculates first torque based on the DC current supplied to the inverter;
a second torque calculation unit which calculates second torque based on the U-phase, V-phase, and W-phase currents; and
a torque limit correction unit which corrects the torque limit using the first torque and the second torque,
wherein the torque limit correction unit decreases the corrected torque limit by current feedback control when the DC current input to the inverter exceeds the current limit.