Control device and phase error correction method

Abstract

The present invention provides a control device capable of suitably detecting the rotation angle of a rotating shaft. [Solution] The control device 50 is a control device for controlling a rotating electric machine equipped with a resolver 42 for detecting the rotation angle of the rotating shaft, and comprises a current supply control unit 58 that performs d-axis current supply control, which is a control that supplies d-axis current to the rotating electric machine when the rotating shaft is stopped, a behavior detection unit 60 that detects the behavior of the rotating shaft when d-axis current supply control is performed, and a correction processing unit 62 that performs a correction process to correct the phase error between the actual rotation angle of the rotating shaft and the rotation angle indicated by the output signal of the resolver 42, according to the behavior detected by the behavior detection unit 60.

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