Variable reluctance ferrite core

Details Variable reluctance ferrite core Variable reluctance ferrite core

2007-05-22

2007-05-22

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Transmission line inductive or radiation interference...

C336S083000, C336S092000, C336S175000, C336S212000

Reexamination Certificate

active

11106005

ABSTRACT:
A device, system, and method for suppressing electromagnetic interference (EMI). In one embodiment, an EMI suppression device includes a compound ferrite core having an inner ferrite core and an outer ferrite core. The inner core includes a through hole in which a conductor may be mounted, and the outer core includes a hole in which said inner core is mounted in a concentrically offset manner. The outer core is rotatably adjustable with respect to the inner core in a manner such that the ferrite circuit cross-section area may be varied. The magnetic reluctance of the compound core is controlled in accordance with EMI suppression requirements by adjusting the circuit cross-section area.

REFERENCES:
patent: 3467930 (1969-09-01), Glover
patent: 3609615 (1971-09-01), Parker et al.
patent: 4167719 (1979-09-01), Forge
patent: 5977854 (1999-11-01), Mihara et al.
patent: 6252313 (2001-06-01), Zhang et al.
patent: 6479886 (2002-11-01), Pollock et al.

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