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| Brushless motor control device and equipment using the control device |
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| Turbopump with actine suspension for a propulsion system |
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| Magnetic bearing apparatus |
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| Ceiling fan |
| OF A PREFERRED EMBODIMENT OF THE INVENTION The fan of the invention includes a canopy 10 by which ... |
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| Waterproof overhead fan |
| As shown in FIGS. 1 and 3, an overhead suspended fan in accordance with the invention includes an ... |
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| Spiral fluted wheel for a water pump |
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| Insulation element and method for introducing winding elements into grooves on an armature |
| Because the insulator element of the invention has at least one plastic element that is intended ... |
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| Electromagnetic vibrator and portable device employing the same |
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| Axial flow fan having a compact circuit board and impeller blade arrangement |
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Rotary electric power generator
| Details |
Inventors: Mori, Hideaki; Kieda, Shigekazu; Kaiho, Masayuki; Shiobara, Ryoichi; Hattori, Kenichi;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Nguyen; Tran
Assistant Examiner:
Attorney, Agent or Firm: Antonelli, Terry, Stout & Kraus, LLP
A turbine electric power generator is provided with winding slots and sub-slots of a rotor; rotor windings having conductors and insulation materials laminated alternately thereon; wedges; and radial ventilation flow passages communicating the sub-slots with through holes of the wedges. In this turbine electric power generator, a projection is provided on an inner face of the radial ventilation flow passages, and the projection height is changed at a rotational axial position. In this manner, there can be provided a gas cooling type rotary electric power generator for turbine with its high cooling performance and high reliability at a low cost. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a rotary electric power generator with its high reliability at a low cost for an air cooling mechanism by improving a cooling performance of the rotary electric power generator without increasing its manufacturing cost.
In order to attain the foregoing object, according to the present invention, there is provided a structure of 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 extending outside of the winding slots at both ends of the rotor; and insulation blocks interposed between wedges or retaining rings, wherein the rotor windings have a number of radial ventilation flow passages passing from the sub-slots to the insulation blocks and wedges, and a projection or rib is provided at the inner face of the radial flow passage.
There is provided another configuration in which a flow passage area for the radial flow passage is changed with a predetermined pitch, and a ratio of the maximum area to the minimum area is 2 or less.
There is provided a still another configuration in which a projection is provided at the inner face of a hole configuring the radial flow passage of the above conductor.
Further, there is provided a further configuration in which the longitudinal flow passage having a protrusive projection is provided with respect to the flow direction of the cooling fluid.
Furthermore, there is provided a still further configuration in which a protrusive projection having a V shaped tip end is provided with respect to the upstream direction of the cooling fluid of the conductor longitudinal flow passage
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Generators or Motors 
