Patent ID: 9350282
Filing Date: 2016-05-24
CPC Classification: H02P

Claim Text:
1. A motor control device generating a voltage command value from a current command value and performing feedback control using a detection current flowing in a motor, the motor control device comprising: a velocity control unit configured to perform velocity control of the motor; a voltage measurement unit configured to measure the voltage command value based on an output of the velocity control unit when the motor is rotated at a constant velocity; and a correction value calculation unit configured to calculate a correction value at a rotation position of the motor based on the measured voltage command value, wherein the voltage command value includes a d-axis voltage command value and a q-axis voltage command value, the voltage measurement unit measures the d-axis voltage command value and the q-axis voltage command value when the motor is rotated based on the velocity command value, the correction value calculation unit calculates a first correction value based on phases of the measured d-axis voltage command value and the measured q-axis voltage command value when the motor is positively rotated, the correction value calculation unit calculates, a second correction value based on phases of the measured d-axis voltage command value and the measured q-axis voltage command value when the motor is negatively rotated, the velocity control unit performs the velocity control such that an absolute value of a rotation velocity of the motor in the positive rotation of the motor is the same as an absolute value of rotation velocity of the motor in the negative rotation of the motor, and the correction value calculation unit calculates the correction value by calculating an average of the calculated first and second correction values.