Rotary electric machine
AssigneeHitachi, Ltd.
InventorsHiroshi Aoyama, Kazuo Gotou, Hidehiro Ejima, Takashi Shibata
Life of this patent
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Abstract
When molding reinforced fiber layers of a creepage block which is in contact with a field winding in a rotor of a rotary electric machine, a layer containing organic fibers made from polybenzoimidazole, polyparaphenylenebenzobisoxazole, aromatic polyamide, polyarylate, and aromatic polyester is integrally molded on that side of the creepage block which is for contact with a field winding. The rotor thus formed stabilizes a slippage between the field winding and the creepage block caused by thermal expansion of the field winding in the rotor during the operation and thereby minimizes the amount of bending of a rotor shaft.
Claims11
A rotary electric machine comprising:
- a stator frame;
- a rotor mounted on the stator frame through bearings, said rotor having a plurality of slots formed in an outer circumferential surface thereof;
- a field winding installed in the slots;
- and
- creepage blocks for electric insulation supported in openings of the rotor in contact with the field winding, each of said creepage blocks being formed by pressing together a resin member containing reinforcement fibers and organic fibers for contact with the field winding.
A rotary electric machine comprising:
- a stator frame;
- a rotor mounted on the stator frame through bearings, said rotor having a plurality of slots formed in an outer circumferential surface thereof;
- a field winding installed in the slots;
- and
- creepage blocks for electric insulation supported in openings of the rotor in contact with the field winding, each of said creepage blocks comprising prepreg sheets and organic fibers for contact with the field winding, said prepreg sheets having reinforcement fibers which are aligned in a direction, impregnated with semi-hardened resin and fixed together, said organic fibers for contact with the field winding being aligned in a direction of axis of the rotor.
Dependencies are inferred from the claim text.