Patent ID: 8907602

Claim:
A control apparatus comprising an operating section and controlling a control amount of a rotating device that includes a plurality of terminals, the operating section operating an alternating-current voltage applying section that includes a plurality of output terminals and applies alternating-current voltage from the output terminals to the respective terminals of the rotating device, the operating section includes: a voltage command value setting section receiving a command value of the control amount and setting terminal voltage command values that are command values of voltages of the respective output terminals of the alternating-current voltage applying section as open-loop operation amounts of the control amount; a plurality of individual correcting sections calculating feedback operation amounts for reducing fluctuation in amplitude of electric currents flowing in the respective terminals of the rotating device on the basis of history information of the electric currents flowing in the respective terminals of the rotating device, the individual correcting sections correcting the terminal voltage command values with the feedback operation amounts; a determining section determining whether it is a switching time from one of a power-running control and a regeneration control to the other of the power-running control and the regeneration control; and a prohibiting section prohibiting difference corresponding amounts from being reflected in correcting the terminal voltage command values with maintaining polarities of the difference corresponding amounts when the determining section determines that it is the switching time, the difference corresponding amounts corresponding to differences of the feedback operation amounts and an average of the feedback operation amounts.