Common mode choke coil with edgewise windings and line...

Details Common mode choke coil with edgewise windings and line... Common mode choke coil with edgewise windings and line...

2005-07-12

2005-07-12

Nguyen, Tuyen T (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

Reexamination Certificate

active

06917273

ABSTRACT:
A common mode choke coil comprises: a Mn—Zn ferrite core which is shaped square, forms a closed magnetic path, and which has an initial permeability of at least 3,000 at 100 kHz and at least 100 at 10 MHz, respectively, at room temperature; and first and second edgewise windings which are formed respectively of first and second rectangular insulated wires. The first edgewise winding is provided around a core leg of the Mn—Zn ferrite core, and the second edgewise winding is provided around a core leg of the Mn—Zn ferrite core located oppositely to the core leg having the first edgewise winding provided therearound. This structure enables the core characteristics to be fully utilized without an influence of stray capacity of winding.

REFERENCES:
patent: 4342013 (1982-07-01), Kallman
patent: 6436308 (2002-08-01), Kobayashi et al.
patent: 6468441 (2002-10-01), Kobayashi et al.
patent: 6767478 (2004-07-01), Ito et al.
patent: 2001/0025944 (2001-10-01), Kobayashi et al.
patent: 1 134 202 (2001-09-01), None
patent: 1 209 136 (2002-05-01), None

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