Patent ID: 6621187
Filing Date: 2003-09-16
Classification: H02K

Abstract:
A rotary electric power generator, comprising:a rotor; axial windings on the peripheral face of the rotor disposed with intervals in a circumferential direction at both sides of the magnetic pole part of the rotor; sub-slots opening at the bottom of the winding slots; rotor windings arranged coaxially with respect to the magnetic pole, extending at and outside of the winding slots, and having conductor insulation materials laminated alternately thereon; wedges in which the rotor windings are fixed to the rotor in the winding slots; a retaining ring on the rotary shaft peripheral side of the rotary windings, the retaining ring extending outside of the winding slots at both ends of the rotor; and insulation blocks of the rotor windings interposed between the wedges or the retaining rings, and the rotor windings having flow passages; wherein the flow passages include at least one of (a) a number of radial flow passages passing from the sub-slots to the insulation blocks and the wedges, a flow passage area for the radial flow passage being changed with a predetermined pitch, and a ratio of a maximum area to a minimum area for the radial flow passage being no greater than 2, and (b) a number of longitudinal flow passages and radial flow passages which communicate from a rotor inner diameter side with the insulation blocks and the wedges, the longitudinal and radial flow passages being combined with each other, and the longitudinal flow passages each have a protrusive projection provided with respect to the flow direction of the cooling fluid.