Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1993-03-25
1993-11-02
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 45, H02K 348
Patent
active
052586812
ABSTRACT:
A magnetic slot wedge inserted in each slot of a stator core of a dynamo-electric machine so as to close an opening of each slot for preventing coils embedded in each slot from getting out of each slot is disclosed. The slot wedge includes a first thin non-magnetic sheet such as a polyester film having the thickness of several ten microns or an aromatic aramid paper, an amorphous sheet bonded to one of two faces of the first non-magnetic sheet opposite the other face facing a coil side in the condition that the wedge is inserted in each slot, and a second thin non-magnetic sheet bonded to the amorphous sheet so as to cover it. Each non-magnetic sheet has such dimensions that each non-magnetic sheet is projected from both ends and both side edges of the amorphous sheet.
REFERENCES:
patent: 917138 (1909-04-01), Robinson
patent: 1042408 (1912-10-01), Dearborn
patent: 2451633 (1948-10-01), Perrigo
patent: 3447009 (1969-05-01), Keuth
patent: 4025840 (1977-05-01), Brissey
Powder Metallurgy, vol. 27, No. 3, pp. 160-162, entitled "Magnetic slot wedges for electrical machines," by B. Drys and A. Kowalski, dated 1984 (no month).
IEEE Transactions on Magnetics, vol. MAG-18, No. 6, entitled "A Research of Efficiency Improvement by Means of Wedging with Soft Ferrite in Small Induction Motors," by Akio Kaga, Yoshihisa Anazawa, Hideo Akagami, Seiji Watabe and Motohiko Makino, dated Nov. 1982.
Hibino Sadayoshi
Kimura Tadatomo
Mochizuki Motoyasu
Ozawa Shigeo
Sakata Yasuo
Kabushiki Kaisha Toshiba
Skudy R.
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