ROTATING MACHINE CONTROL APPARATUS

Abstract

A control apparatus (100) comprises: an electric current detection unit (2) for detecting a rotating machine electric current flowing in a rotating machine (1); a position estimation unit (4) for calculating an estimated value of a rotor position which is positional information relating to a rotor (1b), on the basis of the rotating machine electric current; an electric current control unit (5) for generating a first voltage command which is a command value of a rotating machine voltage for driving the rotating machine (1), on the basis of the detected value of the rotating machine electric current and the estimated value of the rotor position; a position estimation voltage generation unit (30) for generating a position estimation voltage for estimating the rotor position on the basis of a torque axis electric current command which is a physical quantity having correlation with magnetic saturation of a rotor (1b), the position estimation voltage having a higher frequency than the first voltage command; and a voltage applicator (3) for applying a driving voltage to the rotating machine (1) on the basis of a second voltage command obtained by superimposing the position estimation voltage on the first voltage command.

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