| 摘要 |
PURPOSE:To suppress cogging phenomenon by arranging caulking portions half in number of slots and by posting them equi-distantly to an iron core. CONSTITUTION:A stator core 1 is formed ring-shapedly and a rotor shaft is inserted rotatably inside the core. On the internal surface of the stator core 1, slots 6, into which coils are inserted, are formed at equal intervals in 18 spots between tees. V caulkings are arranged at an equal angular interval of 40 deg. on 9 spots, i.e. half in the number of slots 6. Thus the flux is kept constantly to a predetermined value while a rotor is rotating, so that the cogging torque becomes constant and the cogging phenomenon can be suppressed.
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