An apparatus configured to correct a current reference (i qs e **; i ds e **) generated based on a torque reference (Te) so as to control torque of an induction machine, comprising: a calculation unit configured to determine a correction factor that corrects the current reference so as to enable the current reference to satisfy rated operating conditions of the induction machine; and a correction unit configured to correct the current reference using the correction factor, characterized in, that the calculation unit i is configured to: set a first torque reference section and a second torque reference section, and calculate the correction factor according to the section, in which the torque reference is included, of the first torque reference section and the second torque reference section; and calculate a minimum value of candidate values of the correction factor satisfying the minimum excitation current condition of the induction machine as the correction factor when the torque reference is included in the first torque reference section; and calculate the correction factor in proportion to the torque reference when the torque reference is included in the second torque reference section, that the calculation unit is further configured to: calculate, as a criterion torque reference (Te,ref), the torque reference (Te) when a minimum value of the correction factor satisfying a rated slip frequency condition of the induction machine among the rated operating conditions is the same as that of the correction factor satisfying a minimum excitation current condition of the induction machine among the rated operating conditions. a calculation unit configured to determine a correction factor that corrects the current reference so as to enable the current reference to satisfy rated operating conditions of the induction machine; and a correction unit configured to correct the current reference using the correction factor, characterized in, that the calculation unit i is configured to: set a first torque reference section and a second torque reference section, and calculate the correction factor according to the section, in which the torque reference is included, of the first torque reference section and the second torque reference section; and calculate a minimum value of candidate values of the correction factor satisfying the minimum excitation current condition of the induction machine as the correction factor when the torque reference is included in the first torque reference section; and calculate the correction factor in proportion to the torque reference when the torque reference is included in the second torque reference section, that the calculation unit is further configured to: calculate, as a criterion torque reference (Te,ref), the torque reference (Te) when a minimum value of the correction factor satisfying a rated slip frequency condition of the induction machine among the rated operating conditions is the same as that of the correction factor satisfying a minimum excitation current condition of the induction machine among the rated operating conditions. set a first torque reference section and a second torque reference section, and calculate the correction factor according to the section, in which the torque reference is included, of the first torque reference section and the second torque reference section; and calculate a minimum value of candidate values of the correction factor satisfying the minimum excitation current condition of the induction machine as the correction factor when the torque reference is included in the first torque reference section; and calculate the correction factor in proportion to the torque reference when the torque reference is included in the second torque reference section, that the calculation unit is further configured to: calculate, as a criterion torque reference (Te,ref), the torque reference (Te) when a minimum value of the correction factor satisfying a rated slip frequency condition of the induction machine among the rated operating conditions is the same as that of the correction factor satisfying a minimum excitation current condition of the induction machine among the rated operating conditions.