Motor control device and motor control method
AssigneeAisin Corporation
InventorNaoki Onosaka
Life of this patent
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Abstract
A motor control device is 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 includes: a current detection unit configured to detect a current to be input to the three-phase motor; and a control unit configured to control driving of the three-phase motor. The control unit 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 detection unit into a two-phase current; and a determination unit 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.
Claims6
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.
A motor control method for executing 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 method comprising:
- a step of detecting a current to be input to the three-phase motor;
- a step of acquiring a q axis current value by converting a three-phase current to be input to the three-phase motor into a two-phase current;
- and
- a step of determining 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 step of determining that the three-phase motor is idling includes a step of determining, 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.
Dependencies are inferred from the claim text.