Core of a choke coil comprised of amorphous magnetic alloy

Details Core of a choke coil comprised of amorphous magnetic alloy Core of a choke coil comprised of amorphous magnetic alloy

1982-11-23

1986-05-06

Sheehan, John P.

Inductor devices

With closed core interrupted by an air gap

336213, 148403, 148 3155, 75123B, 75123D, 75123L, H01F 1706

Patent

active

045875073

ABSTRACT:
Conventionally, silicon steel strips and ferrite cores have been used as the core of a choke coil. These strips and the like have not yet been replaced with amorphous alloy because in the known amorphous magnetic alloy the pre-magnetization characteristic, the amount of heat generated, and the secular change are poor.
The present invention proposes a core of a choke coil which consists of a coiled thin strip of an amorphous alloy, and has at least one cut air gap, the coiled regions of the thin strip being bound to one another at at least in the neighborhood of said at least one cut air gap, and said amorphous magnetic alloy is essentially comprised of the following composition, Fe.sub.x Mn.sub.y (Si.sub.p B.sub.q P.sub.r C.sub.s).sub.z, wherein x+y+z is 100 atomic % based on all of the elements, y is from 0.001 to 10 atomic %, z is from 21 to 25.5 atomic %, p+q+r+s is atomic % 1, p is from 0.40 to 0.75, r is fro 0.0001 to 0.05, the ratio s/q is from 0.03 to 0.4, and z is z.ltoreq.50p+1, z.ltoreq.10p+19, z.gtoreq.30p+2, and z.gtoreq.13p+13.7.

REFERENCES:
patent: 4226619 (1980-10-01), Hatta et al.
patent: 4265684 (1981-05-01), Boll
patent: 4321090 (1982-03-01), Datta et al.
"Amorphous Materials Having Low Loss at High Frequency" Proc. 4th Int. Conf. on Rapidly Quenched Metals, pp. 953-956, Sendai 1981.

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