| 摘要 |
PROBLEM TO BE SOLVED: To assure balance of the magnetic flux density of a stator by changing the external shape of the stator. SOLUTION: The angular part of a triangular external shape of a stator 10 of an inner rotor type motor is made rounded, and both first slot 11 that is short in the radial direction of stator 10 and is small in the groove area and second slot 12 that is long in the radial direction and is large in the groove area are provided with each slot by six pieces. The first slot 11 is formed at the side of polygonal shape, the second slot 12 is formed at the angular side of a polygon, these first and second slots 11, 12 are provided adjacently, and these first and second slots are provided continuously at every other two slots. Moreover, the first and second slots 11, 12 are formed to divide the teeth of the stator 10 into two sections with a vertical line from the top of a triangle to the bottom. A coil is formed at every other five pitches, and a single-phase coil is used to form the three-phase two-pole with a coil provided between the first and second slots 12.
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