Patent ID: 7504797
Filing Date: 2009-03-17
Classification: H02P

Abstract:
1. A motor control device comprising: an estimator for estimating a rotor position of a motor having a salient pole by using a value corresponding to a q-axis inductance of the motor as an operation parameter; and a controller for controlling the motor based on the estimated rotor position, wherein the estimator generates a deviation between a d-axis and a γ-axis by performing the estimation of the rotor position based on a value between a real q-axis inductance and a real d-axis inductance of the motor adopted as the operation parameter, where the d-axis is an axis parallel to a magnetic flux generated by a permanent magnet that constitutes the rotor, the γ-axis is an estimated axis for the control corresponding to the d-axis, and the q-axis is an axis leading the d-axis by 90 degrees in electrical angle.