US 12,170,494 B2
Electric motor control method and electric motor control device
Mitsuhiro Shouji, Kanagawa (JP); and Tetsuro Kojima, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 18/710,867
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Nov. 19, 2021, PCT No. PCT/JP2021/042656
§ 371(c)(1), (2) Date May 16, 2024,
PCT Pub. No. WO2023/089787, PCT Pub. Date May 25, 2023.
Prior Publication US 2024/0339945 A1, Oct. 10, 2024
Int. Cl. H02P 21/00 (2016.01); H02P 21/05 (2006.01); H02P 21/18 (2016.01); H02P 27/12 (2006.01)
CPC H02P 21/05 (2013.01) [H02P 21/18 (2016.02); H02P 27/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electric motor control method for controlling an electric motor based on a first torque command value corresponding to a required output of the electric motor, the electric motor control method comprising:
a vibration damping step of calculating a second torque command value by correcting the first torque command value by a vibration compensation torque, the vibration compensation torque being a torque correction value for suppressing vibration in an electric motor rotation speed;
a limiting step of limiting the vibration compensation torque based on a limit request suggesting amount, the limit request suggesting amount being a parameter suggesting a situation in which suppression of vibration in the electric motor rotation speed is to be limited;
a limit level determination step of determining a limit level representing a degree of limit on the vibration compensation torque; and
a torque control step of calculating a voltage command value by feeding back a torque suggesting amount suggesting an electric motor torque to the second torque command value, the voltage command value being a command value of a voltage supplied from a predetermined power source to the electric motor, wherein
in the torque control step, a feedback gain of the torque suggesting amount is determined with reference to the limit level.