| 摘要 |
Let an axis parallel to a magnetic flux produced by a permanent magnet provided on a rotor of a motor be called a d-axis, let an axis leading the d-axis by an electrical angle of 90 degrees be called a q-axis, and let control axes corresponding to the d-axis and the q-axis be called a ³-axis and a ´-axis, respectively. Then, a motor control device performs vector control of the motor with the ³-axis and the ´-axis made different from the d-axis and the q-axis, respectively, and with a motor current passing through the motor broken down into a ³-axis current on the ³-axis and a ´-axis current on the ´-axis. The motor control device has an estimator that estimates, as an estimated magnetic flux, a flux linkage of an armature winding of the motor, or estimates, as an estimated induction voltage, an induction voltage generated by the flux linkage and the rotation of the motor; and a specified current value deriving portion that derives, by using the estimated magnetic flux or the estimated induction voltage, a specified ³-axis current value to be followed by the ³-axis current. |
