| 摘要 |
At least one of the salient poles comprises a main pole body on which is wound at least two layers of windings, and a pole shoe arranged at least partial to overlap the windings in a circumferential direction so as to retain the windings, a cooling duct (32, 34) being provided between two layers of windings in an area which is overlapped by the pole shoe. Spacers 40 create the duct and may extend beyond the winding to enhance heat exchange. Coolant is supplied via channel 30 formed by bridge parts 38 formed on laminations and exit groves may be present on the underside of the pole shoes,.which structures may be provided by stacking adjacent identical lamination rotated though one pole position. The separators may be of insulation material or metal insulated where it is within the windings. |
