Patent ID: 7834508

Claim:
An armature comprising: an armature core with 72 slots; and an armature winding that is a three-phase two-pole armature winding wound in two layers, and is housed in the slots, each phase having first, second, third and fourth parallel circuits, each parallel circuit having a serial coil, each serial coil having upper and lower coil pieces connected to each other at a connection side coil end and at a coil end opposite to the connection side, the coil pieces divided into first and second phase belts, the upper and lower coil pieces in the first and third parallel circuits being located at the 1 st , 4 th , 6 th , 7 th , 10 th and 12 th positions, and the upper and lower coil pieces in the second and fourth parallel circuits being located at the 2 nd , 3 rd , 5 th , 8 th , 9 th and 11 th positions, when relative positions of the upper and lower coil pieces in one of the first and second phase belts are indicated by positions counted in a direction separating away from a center of a pole.