| 摘要 |
PROBLEM TO BE SOLVED: To provide armature windings of a motor which have a small coil end and balanced magnetomotive force and small cogging torque by winding a coil of a single phase around at least one tooth and winding coils of two different phases around the other teeth. SOLUTION: A U-phase coil U1 is wound in the forward direction around a first tooth 1 NUI times. The forward direction is such a winding direction that when current is allowed to flow from the positive side to the negative side of a coil, a magnetic field may be directed toward the end of a tooth. In order to allow a combined vector of the currents in the coils wound round one tooth and an adjacent tooth lag by 4/5×πdeg. in phase, a U-phase coil U2 is wound in the reverse direction NU2 times and a V-phase coil V2 is wound in the forward direction Nv2 times, around a second tooth 2. The reverse direction is such a winding direction that when current is allowed to flow from the negative side to the positive side of a coil, a magnetic field may be directed toward the end of a tooth.
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