US 12,113,461 B2
Motor control device and motor control method
Naoki Onosaka, Kariya (JP)
Assigned to AISIN CORPORATION, Aichi (JP)
Filed by AISIN CORPORATION, Aichi (JP)
Filed on Jul. 5, 2022, as Appl. No. 17/857,448.
Claims priority of application No. 2021-112162 (JP), filed on Jul. 6, 2021.
Prior Publication US 2023/0009889 A1, Jan. 12, 2023
Int. Cl. H02P 21/14 (2016.01)
CPC H02P 21/14 (2013.01) 6 Claims
OG exemplary drawing
 
1. A motor control device configured to execute vector control on driving of a three-phase motor according to a d axis current command and a q axis current command, the motor control device comprising:
a current detector configured to detect a current to be input to the three-phase motor; and
a controller configured to control driving of the three-phase motor, wherein
the controller includes:
a three-phase to two-phase conversion unit configured to acquire a q axis current value by converting a three-phase current input to the three-phase motor and detected by the current detector into a two-phase current; and
a determiner configured to determine that the three-phase motor is idling when the q axis current value is equal to or smaller than a determination threshold set in advance,
wherein the idling is a condition where the three-phase motor is under a no load condition,
wherein the determiner is configured to determine, based on the determination threshold set in advance so as to increase as a rotation speed of the three-phase motor increases, that the three-phase motor is idling when the q axis current value is equal to or smaller than the determination threshold.