Inductance device with gap

Details Inductance device with gap Inductance device with gap

1998-09-01

1999-12-14

Kozma, Thomas J.

Inductor devices

With closed coil or conductor member

336178, 336192, 336198, H01F 2729, H01F 2730

Patent

active

060023198

ABSTRACT:
An inductance device comprises: an EE type ferrite core with an air gap at a center leg portion; a bobbin having at least three chambers wound by coils, said ferrite core being placed on said bobbin; and a shield coil formed by a first part and a second part of the coil, in which the first part is wound a chamber surrounding a peripheral portion of the air gap and the second part is wound the chamber in a reverse direction of the first part, the ends of the shield coil being short-circuited. In the inductance device with gap, the first and second parts of the coil are wound in the chamber surrounding the peripheral portion of the air gap in opposite direction each other, and the ends of the coil are shorted circuited. Thus, it is formed the shield coil for a leak magnetic flux from the air gap containing a component perpendicular to the main magnetic flux.

REFERENCES:
patent: 2463778 (1949-03-01), Kellogg
patent: 2859337 (1958-11-01), Rietveld
patent: 3768055 (1973-10-01), Oliver

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