Ferrite, and transformer and method for driving it

Details Ferrite, and transformer and method for driving it Ferrite, and transformer and method for driving it

1999-01-15

2000-06-20

Koslow, C. Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, 336233, C04D 3526, H01F 134

Patent

active

060774533

ABSTRACT:
Provided are an Mn--Zn ferrite in which the core loss is low and Bs is high at high temperatures; a transformer capable of being small-sized and suitable to use at high temperatures; and a method for efficiently driving the transformer. Also provided is a transformer capable of being small-sized and suitable to use in a broad temperature range including high temperatures. Further provided are a high-efficiency transformer capable of being small-sized, in which the core loss in the ferrite core is low and the saturation magnetic flux density is high therein at the temperature at which the transformer is driven; and a high-efficiency driving method for the transformer. Depending on its use, Mn--Zn ferrite to be the ferrite core for the transformers comprises, as the essential components, specific amounts of Fe.sub.2 O.sub.3, ZnO and MnO, and, as the side components, specific amounts of SiO.sub.2, CaCO.sub.3, Nb.sub.2 O.sub.5 and ZrO.sub.2. The core of the transformers is made of the Mn--Zn ferrite.

REFERENCES:
patent: 5846448 (1998-12-01), Yasuhara et al.
patent: 5980773 (1999-11-01), Takeda

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