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Common mode filter, and manufacturing method of common mode filter

A technology of common mode filter and manufacturing method, applied in the direction of inductor/transformer/magnet manufacturing, coil manufacturing, inductors, etc., can solve the problem of difficulty in obtaining DC overlap characteristics, and achieve the effect of good DC overlap characteristics

Inactive Publication Date: 2009-08-05
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the conventional common mode filter, although good abnormal impedance frequency characteristics can be obtained, it is difficult to obtain good DC superposition characteristics

Method used

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  • Common mode filter, and manufacturing method of common mode filter
  • Common mode filter, and manufacturing method of common mode filter
  • Common mode filter, and manufacturing method of common mode filter

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Embodiment Construction

[0034] Below, refer to Figure 1 ~ Figure 7 The common mode filter according to the embodiment of the present invention will be described. Such as figure 1 As shown, the common mode filter 1 includes a core 10, a bobbin 20, a winding wire 30, and an insulating base 40.

[0035] The core 10 is composed of a magnetic body (for example, ferrite, etc.), such as figure 1 , figure 2 As shown, it is formed into a substantially integral shape of "mouth". The core 10 has a pair of short side portions 11, 11 and a pair of long side portions 12, 12 ( figure 2 ), the cross-sections of the long side portions 12, 12 cut vertically in the longitudinal direction of the long side portions 12, 12 respectively form a substantially octagonal shape. On the long side parts 12, 12, in a state of being respectively installed in a ring shape, the spools 20, 20 are rotatably supported one by one with respect to the long side parts 12, 12 ( figure 1 ).

[0036] The spools 20 and 20 each have a core port...

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Abstract

The invention provides a common mode filter obtaining a great direct current overlapping characteristic and manufacturing thereof. A flange portion (23) respectively divides the first line spool (20 (1)), the second line spool (20 (2)) into the primary side and secondary side; a lead (30) respectively are winding the primary side and secondary side by two pieces in sum. One end (30A) of the lead (A) is winded on the core portion (21) of the first line spool (20 (1)); another end (30B) is winded on the core portion (21) of the first line spool (20 (2)); the middle portion are arranged on the first line spool (20 (1)) and the second line spool (20 (2)).

Description

Technical field [0001] The present invention relates to a common mode filter, and in particular to a common mode having a core having a substantially “mouth” shape forming four sides and a spool on which two wires are wound on a pair of the opposing sides. filter. Background technique [0002] Known as a common mode filter is a coil component composed of a substantially square-shaped core having four sides and a bobbin on which a wire is rotatably supported by the sides. The spools are respectively provided on a pair of sides of the cores facing each other one by one, and the sides of the core are rotatably supported by the sides with the sides of the core as a rotating shaft. [0003] The bobbin is provided with a winding core that is formed in a substantially cylindrical shape, and flanges that are provided on one end and the other end of the winding core and protrude substantially perpendicular to the direction of extension of the winding core, and can be opposed to each other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/06H01F41/06H01F5/02
CPCH01F17/0013H01F17/045H01F41/041
Inventor 小林一三须田慎吾国塚光祐
Owner TDK CORPARATION
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