ERROR FREQUENCY COMPONENT ACQUISITION DEVICE, ANGLE OF ROTATION ACQUISITION DEVICE, MOTOR CONTROL DEVICE, AND ANGLE OF ROTATION ACQUISITION METHOD

摘要

Provided is a device which uses a resolver to detect an angle of rotation of a rotor, with which it is possible to obtain an angle of rotation of a rotor with a small error while reducing load on an adjuster. An angle measured value acquisition unit (210) acquires a motor axle angle of rotation measured value, and an error computation unit (220) computes an error which is included in each of a plurality of angle of rotation measured values. A frequency component acquisition unit (230) derives a phase and amplitude of an error frequency component from a plurality of errors. It is thus possible for an error frequency component acquisition device (121) to automatically compute phase and amplitude of an error frequency component included in an angle of rotation measured value, and to carry out a correction on the angle of rotation measured value using the phase and amplitude. Accordingly, it is possible to obtain an angle of rotation of a rotor with a small error while reducing the load on an adjuster.