Rotating electric machine

A rotating electric machine comprising:

• a rotor which is rotatably supported and which has, on its outer circumference, a plurality of convex-shaped salient pole sections arranged in a circumferential direction;
• a stator core which is disposed around the outer circumference of the rotor with an air gap formed therebetween and which has, on its inner circumference, a plurality of convex-shaped teeth arranged in a circumferential direction;
• field windings each of which is wound around each of the plurality of the teeth, each of the field windings forming a pole;
• and
• armature windings each of which is wound around each of the plurality of the teeth so as to be insulated from the field windings, forming a plurality of poles, wherein
• the number of the teeth and the number of the poles formed by the field windings are equal, and
• a ratio of the number of the poles formed by the field windings to the number of the poles formed by the armature windings is equal to a predetermined ratio, and the number of the salient pole sections formed in the rotor is equal to (pf+pa)/2, where pf is the number of the poles formed by the field windings, and pa is the number of the poles formed by the armature windings.