| 摘要 |
PURPOSE:To maintain the securing strength of inner and outer stator cores constant irrespective of press-fitting direction by skewing the inner core. CONSTITUTION:A inner stator core 11 is formed by skewing inner stator core sheets 9 punched from electromagnetic steel plates with approx. 1-1.3 slot pitch, and laminating fixedly the sheets. Then, the inner periphery of outer core sheet 10 is engaged with the outer periphery of the core 11. Thus, the press-fitting strength of the inner and outer cores in the press-fitting direction less decreases to reduce a noise and a magnetic resistance between the both bores, and the magnetic cogging between a rotor and a stator can be reduced by the skew. |
