Control device and control method for rotating electric machine

A control method for controlling a rotating electric machine including windings of a plurality of independent systems, wherein the rotating electric machine is controlled in:

• a first mode in which a control device that controls the rotary electric machine energizes the windings of the plurality of independent systems with an AC current to generate driving torque such that a combined magnetic field generated in the windings of the plurality of independent systems is greater than or equal to a predetermined value;
• and
• a second mode in which the AC current having a phase difference different from that in the first mode is energized to the windings of the plurality of independent systems, the combined magnetic field generated in the windings of the plurality of independent systems is made smaller than the predetermined value, and current greater than or equal to that in the first mode flows,
• wherein the control device:
• switches between power running control and regenerative control by an operation amount of one pedal;
• and
• switches between the first mode and the second mode according to a charge amount of a battery during the regenerative control.