Inductor

Details Inductor Inductor

1975-09-19

1977-02-22

Kozma, Thomas J.

Inductor devices

With permanent magnet

336155, 336178, 336212, 336215, 336219, H01F 2100

Patent

active

040094600

ABSTRACT:
An inductor having a coil member commonly wound on a couple of closed magnetic circuits made of a soft magnetic material. A magnetic gap is provided at a part of the soft magnetic material of at least one of the two closed magnetic circuits, and a permanent magnet providing a magnetic bias is inserted in the magnetic gap. This inductor is used in series between a DC power source providing a superimposed current of a DC current and an AC current and a load. The inductance of the inductor is very large with respect to a small DC current, while it reduces sharply when the applied DC current increases to be a certain value to show a substantially constant low value with respect to a DC current value beyond the certain value.

REFERENCES:
patent: 2306998 (1942-12-01), Claesson
patent: 2802170 (1957-08-01), Starr et al.
patent: 2831157 (1958-04-01), Grayson et al.
patent: 2866943 (1958-12-01), Ringelman

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