Choke coil for eliminating common mode noise and normal mode noi

Details Choke coil for eliminating common mode noise and normal mode noi Choke coil for eliminating common mode noise and normal mode noi

1996-02-02

1999-11-02

Kozma, Thomas J.

Inductor devices

With mounting or supporting means

336160, 336212, 336214, H01F 2706, H01F 2726, H01F 2730

Patent

active

059778539

ABSTRACT:
There is provided a choke coil having a sufficient noise eliminating effect against common mode and normal mode noises. The choke coil has two bobbins, a pair of windings wound around the respective bobbins, first and second magnetic cores which are each inserted in cylindrical body portions of the bobbins at one side thereof, and a support member for supporting the cores. The first magnetic core is in the form of the character B and made of a material having lower permeability. The second magnetic core is in the form of the character D and made of a material having higher permeability. A predetermined gap is maintained between the cores by a spacer provided on the top surface of the support member.

REFERENCES:
patent: 2264057 (1941-11-01), Treanor
patent: 3454916 (1969-07-01), Hoover
patent: 3739255 (1973-06-01), Leppert
patent: 4176333 (1979-11-01), Bennon et al.
patent: 4520335 (1985-05-01), Rauch et al.
patent: 4835497 (1989-05-01), Takagi et al.
patent: 5266916 (1993-11-01), Kijima
patent: 5373277 (1994-12-01), Naito

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