Control apparatus for electric rotating machine

A control apparatus for an electric rotating machine configured to control at least one controlled variable of the electric rotating machine by manipulating an output voltage of a power converter circuit including switching elements operated at a set modulation index to connect positive and negative terminals of a DC power source to corresponding terminals of the electric rotating machine, the control apparatus comprising:

• a prediction section configured to predict a first value of the controlled variable of the electric rotating machine for each of a plurality of cases where the power converter circuit is set in a corresponding one of a plurality of predetermined operating states;
• a feedforward control section including a calculating section to calculate, in accordance with a voltage of the DC power source and electrical angular velocity of the electric rotating machine inputted thereto, a second value of the controlled variable of the electric rotating machine as a target value to be set depending on the voltage of the DC power source at which an average value of magnitude of the output voltage of the power converter circuit is controlled, the feedforward control section being configured to set, as a command value of the at least one controlled variable, at least one of the second value of the controlled variable calculated by the calculating section and a third value of another controlled variable calculatable from the second value of the controlled variables;
• and
• a manipulation section configured to select one of the predetermined operating states of the power converter circuit depending on a result of evaluation of an evaluation function receiving the first value of the controlled variable predicted by the prediction section and the command value set by the feedforward control section as input parameters thereof, and to manipulate the converter circuit to be brought to the selected operating state.