Coil device

Details Coil device Coil device

1991-02-22

1994-05-24

Kozma, Thomas J.

Inductor devices

With closed core interrupted by an air gap

336 83, 336212, H01F 1704, H01F 2724

Patent

active

053152794

ABSTRACT:
The present invention provides a coil device including magnetic cores having gap regions and a coil wound to contain the gap regions. The present invention provides an improvement in which a shape of at least one of the opposing magnetic cores forming the gap regions is formed into a curve of logarithmic function from its base end to its extreme end, its most extreme end is provided with a gap adjusting flat surface and then a plurality of gaps are formed in the gap regions.
With such an arrangement as above, the present invention provides the coil device capable of reducing a leakage magnetic flux produced around the gaps, preventing an abnormal generation of heat of the coils and further preventing a bad influence of noise against a peripheral apparatus.

REFERENCES:
patent: 3434085 (1969-03-01), Gang
patent: 3566323 (1971-02-01), Graf et al.
patent: 3787790 (1974-01-01), Hull
patent: 4282567 (1981-08-01), Voigt
Patent Abstracts of Japan, vol. 4, No. 130 (E-25) (612) Sep. 12, 1980, & JP-A-55 83210 (Nippon Denshi K.K.).

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