US 12,445,074 B2
Synchronous machine control device, synchronous machine control method, and electric vehicle
Shun Taniguchi, Tokyo (JP); Noriya Nakao, Tokyo (JP); Kazuaki Tobari, Tokyo (JP); Toshiyuki Ajima, Tokyo (JP); and Kentaro Matsuo, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/281,731
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Aug. 31, 2021, PCT No. PCT/JP2021/031848
§ 371(c)(1), (2) Date Sep. 12, 2023,
PCT Pub. No. WO2022/195918, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 2021-044902 (JP), filed on Mar. 18, 2021.
Prior Publication US 2024/0171107 A1, May 23, 2024
Int. Cl. H02P 21/10 (2016.01); H02P 21/05 (2006.01); H02P 21/14 (2016.01); H02P 21/22 (2016.01); H02P 25/024 (2016.01); H02P 27/08 (2006.01)
CPC H02P 25/024 (2016.02) [H02P 21/141 (2013.01); H02P 21/22 (2016.02); H02P 27/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A synchronous machine control device that controls a power converter to which a synchronous machine is connected, the synchronous machine control device comprising:
a first magnetic flux command calculation unit that calculates a first magnetic flux command value from a current command value of the synchronous machine;
a magnetic flux estimation unit that estimates a magnetic flux value of the synchronous machine from a current detection value of the synchronous machine;
a voltage calculation unit that generates a d-axis voltage command value of the power converter such that the first magnetic flux command value matches the magnetic flux value; and
a damping ratio control unit that generates a correction amount of the d-axis voltage command value based on a vibration component of the magnetic flux value such that the vibration component is damped.