Rotary electric machine and electric power steering device using rotary electric machine

A rotary electric machine comprising:

• a rotor having a rotor core and a plurality of field poles provided in the rotor core;
• and
• a stator having a stator core that includes 6 (2 m+k)×n (where k, n, and m are integers no smaller than 1) teeth and a plurality of armature coil bodies in which at least one of a first armature winding and a second armature winding is wound around each of the plurality of teeth,
• wherein a three-phase current is supplied to the first armature winding from a first inverter,
• a three-phase current is supplied to the second armature winding from a second inverter,
• each of the plurality of armature coil bodies is an armature coil body of one of three phases,
• 2 k×n armature coil bodies of each of the three phases, in which the first armature winding and the second armature winding are both wound around 6 k×n of the teeth, form 6 k×n armature coil bodies of the plurality of armature coil bodies, and these armature coil bodies of each of the three phases are set respectively as Ua, Va, and Wa,
• 2 m×n armature coil bodies of each of the three phases, in which only the first armature winding is wound around 6 m×n of the teeth, form further 6 m×n armature coil bodies of the plurality of armature coil bodies, and these armature coil bodies of each of the three phases are set respectively as Ub, Vb, and Wb,
• 2 m×n armature coil bodies of each of the three phases, in which only the second armature winding is wound around 6 m×n of the teeth, form the remaining 6 m×n armature coil bodies of the plurality of armature coil bodies, and these armature coil bodies of each of the three phases are set respectively as Uc, Vc, and Wc, and
• Ua, Va, Wa, Ub, Vb, Wb, Uc, Vc, and Wc are respectively arranged so as to exhibit 2 n-fold rotational symmetry about an axial center of the rotor, and
• respective electrical angle phases of Ua, Va, and Wa take a value no smaller than an (m+1)th smallest value and no larger than an (m+k)th smallest value among the (2 m+k) armature coil bodies of the same phase within a minimum unit of the rotational symmetry.