To limit d-axis current to an arbitrary value while avoiding duty saturation of a motor. A motor control device including: a voltage command value calculation unit (45, 46) configured to calculate a voltage command value of voltage applied to a motor (20), based on a q-axis current command value and a d-axis current command value; a driving circuit (48) configured to output driving power to the motor (20), based on the voltage command value; a d-axis current command value calculation unit (73) configured to calculate the d-axis current command value limiting the voltage command value to a maximum voltage applicable to the driving circuit or less by field-weakening control; a d-axis current command value limitation unit (74) configured to limit the d-axis current command value calculated by the d-axis current command value calculation unit (73); and a q-axis current command value limitation unit (75) configured to limit the q-axis current command value lest the voltage command value exceed the maximum voltage due to limitation of the d-axis current command value by the d-axis current command value limitation unit (74).
MOTOR CONTROL DEVICE, ELECTRICALLY DRIVEN ACTUATOR PRODUCT, AND ELECTRICALLY DRIVEN POWER STEERING DEVICE
2021-07-15
Patent
Electronic Resource
English
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