Choke coil for suppressing common-mode noise and normal-mode noi

Details Choke coil for suppressing common-mode noise and normal-mode noi Choke coil for suppressing common-mode noise and normal-mode noi

1997-05-19

1998-08-11

Gellner, Michael L.

Inductor devices

With supporting and/or spacing means between coil and core

Preformed insulation between coil and core

336208, 336214, 336 65, 336212, H01F 2706, H01F 2730, H01F 2724

Patent

active

057932735

ABSTRACT:
A choke coil exhibits sufficient capability in suppressing both common-mode noise and normal-mode noise while inhibiting an occurrence of magnetic saturation of a magnetic core. A terminal stand is formed of a frame and a magnetic plate. A split-type bobbin has a bobbin member made from a magnetic substance and a bobbin member made from an insulating substance. The bobbin is formed of a rod and three flanges provided for the rod. A pair of windings are reeled around the rod of the bobbin. Further, one side of an integral-type magnetic core formed in a hollow-rectangular shape is inserted into a hole formed in the rod of the bobbin. The magnetic bobbin member is placed outside a region surrounded by a closed magnetic path formed by the magnetic core. The magnetic bobbin member also forms a closed magnetic path together with the magnetic plate of the terminal stand.

REFERENCES:
patent: 4924200 (1990-05-01), Kitahara et al.
patent: 4945332 (1990-07-01), Sakamoto et al.
patent: 5635891 (1997-06-01), Miyoshi et al.

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