Magnetic core for AC electrical equipments

Details Magnetic core for AC electrical equipments Magnetic core for AC electrical equipments

1990-12-18

1992-12-15

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 51, 310216, 310254, 310261, 318118, 335215, 336112, H01L 4112

Patent

active

051720205

ABSTRACT:
A magnetic core employed in AC motors, transformers and the like includes a first core portion formed by laminating silicon steel sheets each containing 3.5% silicon, the first core portion having two ends in the direction that the sheets are laminated, and second core portions disposed at the respective ends of the first core portion and formed by laminating silicon steel sheets each containing 6.5% silicon. In distorted wave alternating field, low frequency fluxes pass through the first core portion and harmonic fluxes pass through the second core portions. Since each second core portion has a low level of magnetostriction, the magnetic noise due to the harmonics is reduced.

REFERENCES:
patent: 2551848 (1951-05-01), Parker
patent: 2572313 (1951-10-01), Burns, Jr.
patent: 3007063 (1961-10-01), Harris
patent: 3696259 (1983-10-01), Mori
patent: 4377762 (1983-03-01), Tatsumi
patent: 4427462 (1984-01-01), Senno
"Development of Fe 6.5 wt % Si Sheet in Commercial Scale Production", Y. Takada et al.; (no month) 1989; Materials Res. Soc., vol. II, pp. 199-207, Kawasaki, Japan.

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