| 摘要 |
An electric rotating machine has a stator generating a magnetic flux and a rotor with a columnar armature core and an armature coil wound on the core. The flux passes through the rotor. The rotor is rotatable around its center axis. The core has slots aligned along its circumferential direction. Each slot extends along an axial direction of the core. The coil has upper layer coil parts and lower layer coil parts alternately connected with one another. Each pair of upper and lower layer coil parts is received in one slot so as to place the lower layer coil part nearer to the center axis of the core than the upper layer coil part. A sectional area of the upper layer coil part received in each slot is larger than a sectional area of the lower layer coil part received in the slot.
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