Transformer core

Details Transformer core Transformer core

1992-11-25

1994-12-06

Kozma, Thomas J.

Inductor devices

Plural part core

336217, 336218, 336234, H01F 2724

Patent

active

053714865

ABSTRACT:
A transformer core includes a first core member formed by laminating grain oriented 3% silicon steel sheets and second core members disposed at respective sides of the first core member in the direction of lamination so that the first core member is sandwiched by the second core members. Each second core member is formed by laminating non-oriented 6.5% silicon steel sheets. A commercial frequency component of magnetic fluxes mainly passes through the second core members such that an amount of noise caused by a higher harmonic component is reduced.

REFERENCES:
patent: 2088440 (1937-07-01), Ruder
patent: 2465798 (1949-03-01), Granfield
patent: 3290633 (1966-12-01), Kuriyama et al.
patent: 4205288 (1980-05-01), Lin et al.
"Application of 6.5% Si Steel Sheets to Audio Frequency Transformers," by Yasushi Tanaka et al., NKK Technical Report No. 131 (1990), pp. 1-8.
Development of Fe-6.5 wt. % Si Sheet in Commercial Scale Production, Y. Takada, M. Abe Fujita, MRS International Meeting on Adv. Mats. vol. 11 (1989).

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