Permanent magnetic rotor and producing apparatus of the same

Details Permanent magnetic rotor and producing apparatus of the same Permanent magnetic rotor and producing apparatus of the same

1993-09-02

1996-12-03

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 2112

Patent

active

055811400

ABSTRACT:
A permanent magnetic rotor is disclosed, which comprises a rotor iron core constructed of a large number of steel plates being layered, each of the steel plates peripherally defining a plurality of sector-shaped blanked holes, and sector-shaped permanent magnetic pieces inserted into the blanked holes, wherein each of the steel plates comprises an outer peripheral ring portion formed on an outer side of the blanked hole, a yoke portion formed on an inner side of the blanked hole, a connect portion formed between the outer peripheral ring portion and the yoke portion, and thin and long fitting protrusions formed at corner portions of the blanked hole in the vicinity of the connect portion, the fitting protrusions protruding to the magnet insertion hole, the fitting protrusions being fitted to the permanent magnetic piece so as to pressure and fix the permanent magnetic piece.

REFERENCES:
patent: 1843222 (1932-02-01), Harley
patent: 4474259 (1988-05-01), Schaefer
patent: 4973872 (1990-11-01), Dohogne
patent: 5258678 (1993-11-01), Futami

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