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Patent Searching and Data


Title:
COMPOSITE CORE FOR TRANSFORMER
Document Type and Number:
Japanese Patent JPS5776811
Kind Code:
A
Abstract:

PURPOSE: To obtain cores with small saturation current and small iron loss and a high magnetic permeability in a normal operation by laminating cores of different saturation magnetic fluxes in size to each other.

CONSTITUTION: The first material a such as ferrite permalloy core 21 with relatively high magnetic permeability and the second material b such as permalloy silicon steel plate core 22 whose magnetic permeability is smaller than the material a, are laminated. Normally the material a with a higher magnetic permeability works and when the material a becomes saturated by the flux HS, the permeability becomes small, moving to the B-H curve of the material b and, even in the state of deflected magnetism, the magnetizing current changes from the saturated current of them material a alone to the magnetizing current of the material b thereby controlling magnetizing current.


Inventors:
Yokoyama, Hideo
Yamashita, Shigeji
Application Number:
JP1980000152539
Publication Date:
May 14, 1982
Filing Date:
October 30, 1980
Export Citation:
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Assignee:
FUJITSU DENSO LTD
International Classes:
H01F3/00; H01F3/10; H01F27/24; H01F30/00; (IPC1-7): H01F3/00; H01F27/24; H01F31/00