A field-weakening controller determines a d-axis current command correction value in a field-weakening control according to a voltage of a DC power supply and a voltage amplitude of a voltage command. A d-axis current final value calculator outputs a d-axis current command final value calculated using a d-axis current command value and a d-axis current command correction value. A field-weakening controller has a voltage amplitude command limiter that limits a voltage amplitude command determined based on the power supply voltage. A voltage amplitude command limiter limits the voltage amplitude command to a voltage amplitude command limit value when the motor state quantity, which is correlated with a time rate of change when a sine wave center voltage of the voltage command crosses from negative to positive, is equal to or greater than a predetermined limit start value.
MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE PROVIDED WITH SAME
21.12.2023
Patent
Elektronische Ressource
Englisch
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