Patent Document ID: 9325275
Application ID: 14559250
Patent Flag: 1

Claim One:
1. A control apparatus controlling a motor that includes windings with a plurality of phases, the motor rotating on electric power from a power source to rotate and drive a driving target, the control apparatus comprising: a plurality of switching devices provided to correspond to the respective phases of the windings, each switching device permitting current application to corresponding windings by performing ON operation and shutting down the current application to the corresponding windings by performing OFF operation; a drive controller that controls driving of the motor by controlling the ON operation or the OFF operation of each switching device; a current detection circuit that detects a current value of electric currents flowing through the windings and the switching devices; a current limiting circuit that restricts the electric currents flowing through the windings and the switching devices so that an average of the current value detected by the current detection circuit is within a predetermined value span; a reference position learning controller that performs a reference position learning control to rotate the motor until the driving target stops at a limit position of a working span while restricting the electric currents flowing through the windings and the switching devices by using the current limiting circuit, to learn a reference position of the motor; and an anomaly detection controller that detects an anomaly in the current limiting circuit based on the current value detected by the current detection circuit during the reference position learning control performed by the reference position learning controller.