| 主权项 |
1. A rotating electrical machine control device that applies a high frequency current to a rotating electrical machine including a rotor having saliency, estimates a magnetic pole direction of the rotor on the basis of a high frequency component contained in a voltage command as a response component to the high frequency current, and controls the rotating electrical machine, comprising:
a high frequency superimposing section that sets an estimated d-q axis rotating coordinate system in which the estimated magnetic pole direction is defined as an estimated d-axis and a direction perpendicular to the estimated d-axis in terms of an electrical angle is defined as an estimated q-axis, and superimposes a high frequency current command as a command of the high frequency current on a current command to the rotating electrical machine in the estimated d-q axis rotating coordinate system; a magnetic pole direction adjusting section that sets a high frequency coordinate system having a phase difference of the high frequency current command with respect to the estimated d-q axis rotating coordinate system, and changes an estimated value of the magnetic pole direction so that a value on the high frequency coordinate system resulting from a coordinate transformation of the voltage command represented by the estimated d-q axis rotating coordinate system becomes closer to a high frequency target value whose initial value is set to zero; and a steady estimation error correcting section that calculates, regarding d-q axis magnetic flux interference in which a change in current on one of d and q axes affects a magnetic flux on the other axis, a magnetic flux interference estimation error as an error of the estimated value of the magnetic pole direction which is caused by the d-q axis magnetic flux interference, on the basis of the current command or a torque command to the rotating electrical machine, and corrects, on the basis of the magnetic flux interference estimation error, a phase of the high frequency current command for use in the coordinate transformation or the high frequency target value. |
