Coil part

Abstract

In a winding-type common mode choke coil serving as an example of a coil part, troubles such as mode conversion characteristics becoming larger due to the effects of stray capacitance are eliminated. A 0.5 shift region A which shifts 0.5 turns between a first wire (43) of a first layer and a second wire (44) of a second layer, and a 1.5 shift region B which shifts 1.5 turns in the opposite direction are distributed on a winding coil section (45) along the axial direction. In the 0.5 shift region A, a diagonal capacity which is quantified as -1 or +1 is generated for each one turn, and in the 1.5 shift region B, a diagonal capacity which is quantified as +3 or -3 is generated for each one turn. Here, the sum of the number of turns of the second wire (44) positioned in the 0.5 shift region A is set to be at least two times and at most five times the sum of the number of turns of the second wire positioned in the 1.5 shift region B, thereby balancing the diagonal capacity over the entirety of the first and second wires to reduce the effects of stray capacitance.

Description

technical field [0001] The present invention relates to a coil component, and particularly relates to an improvement regarding the winding method of the wire in a wire-wound coil component having a structure in which two wires are wound around a winding core. Background technique [0002] A typical example of the coil component according to the present invention is a common mode choke coil. [0003] The common mode choke coil of interest in the present invention is described in, for example, Japanese Patent No. 4789076 (Patent Document 1). exist Figure 9 The external appearance of the common mode choke coil 41 which has basically the same structure as the structure described in patent document 1 is shown in . [0004] Such as Figure 9 As shown, the common mode choke coil 41 is provided with the core 42, the 1st wire (wire) 43, and the 2nd wire 44 which respectively comprise an inductor. The core 42 is made of an electrically insulating material, more specifically, alumin...

AI Technical Summary

Problems solved by technology

[0013] In the common mode choke coil 41 described above, when the frequency of the signal input to it becomes higher, the ratio of the input differential signal component that is converted into common mode noise and outputted, that is, the mode conversion characteristic, may be expressed poorly. Big

[0014] The same problem is not limited to common mode choke coils, for example, the same problem can be encountered in a wire-wound chip transformer with the same first and second wires

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