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Title:
CHOKE COIL
Document Type and Number:
WIPO Patent Application WO/1995/029493
Kind Code:
A1
Abstract:
A choke coil used in electronic equipment, etc., for consumer and industrial uses as a countermeasure against harmonic distortion. The choke coil comprises a first magnetic core (1) forming a closed or open magnetic circuit, a second magnetic core (2), a first coil (3a), a second coil (4a), and a third coil (5a). The first coil (3a) is wound around the first core (1), the second coil (4a) around the second core (2), and the third coil (5a) around the first and second cores (1 and 2), thus forming a magnetic circuit. The inductance value required to prevent harmonic distortion is ensured and the function of a common-mode choke coil is provided. The degree of coupling is high, the size of the coil is small, and the leakage fluxes are small.

Inventors:
Onishi
Kazuaki, Uematsu
Hidenori, Imanishi
Tsunetsugu, Sato
Munekazu
Application Number:
PCT/JP1995/000790
Publication Date:
November 02, 1995
Filing Date:
April 21, 1995
Export Citation:
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Assignee:
Matsushita
ELECTRIC
INDUSTRIAL
CO., LTD.
Onishi, Kazuaki
Uematsu, Hidenori
Imanishi, Tsunetsugu
Sato, Munekazu
International Classes:
H01F27/24; H01F3/10; H01F37/00; (IPC1-7): H01F37/00
Foreign References:
JPH02503251A
JPH0577921U
JPH04133415U
JPH0541121U
JPH0582034U
JPS3814910Y1
JPS6453513A
JPH0480022U
JPS51137868A
Other References:
See also references of EP 0706192A1
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