COIL - SHT CORP LIMITED

Title:

COIL

Document Type and Number:

WIPO Patent Application WO/1999/003116

Kind Code:

A1

Abstract:

A coil for a transformer, a choke coil, and the like, having a simple structure, a small iron loss, and an inductance which little decreases with current. The coil comprises at least one rod-like core (5) longer than the inside diameter of an annular core (2) made of an amorphous metal or a microcrystalline metal and superposed fixedly on the surface of the annular core (2) and a conductive material (6) wound around the rod-like core (5). More specifically, the coil comprises at least one rod-like core (3) longer than the inside diameter of the annular core (2) and inserted fixedly between two annular core surfaces (2, 2) and a conductive material (6) wound around the rod-like core (3). The coil can be manufactured extremely easily as compared with conventional coils, e.g. a troidal coil, where a copper wire is wound around an annular core. Since the iron loss is reduced as compared with a conventional coil employing a cut core and a conventional troidal coil, energy can be saved, and the inductance little decreases with increase of current. It can be widely used for, e.g., transformers and choke coils.

Inventors:

YOSHIMORI HITOSHI (JP)

Application Number:

PCT/JP1998/002867

Publication Date:

January 21, 1999

Filing Date:

June 26, 1998

Export Citation:

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Assignee:

SHT CORP LIMITED (JP)
YOSHIMORI HITOSHI (JP)

International Classes:

H01F3/10; H01F5/00; H01F27/24; H01F37/00; (IPC1-7): H01F27/24

Foreign References:

JPS5926209U	1984-02-18
JPS58140625U	1983-09-21

Other References: