Patent ID: 6774515
Filing Date: 2004-08-10
Classification: H02K

Abstract:
A rotary electric power generator, comprising:a rotor; axial winding slots on the peripheral face of the rotor disposed with intervals in the circumferential direction at both sides of the magnetic pole parts 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 wedges or retaining rings, the rotor windings having a number of radial ventilation flow passages passing from the sub-slots to the insulation blocks and wedges, wherein a projection or rib is provided at the inner face of the radial flow passage with respect to the flow direction of the cooling fluid in the radial flow passage; and wherein a projection height from the inner face of the radial flow passage of the projection or rib is greater at a center of the rotor, and is smaller at an end of the rotor.