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coil device

A coil device and coil technology, applied in the direction of transformer/inductor coil/winding/connection, transformer/inductor magnetic core, etc., can solve the problems of difficult to maintain the core reliably, poor heat dissipation, dimensional deviation, etc., to achieve installation Ease of handling, excellent heat dissipation, and reduced manufacturing costs

Active Publication Date: 2016-10-19
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the upper part of the core is not covered with resin and the core is divided, it is difficult to elastically hold the entire upper part of the coil using a leaf spring.
[0007] The reason is that due to the dimensional deviation in each of the divided cores, even if the entire upper part of these divided cores is covered, a gap will be generated between any core and the leaf spring, and it is difficult to securely hold the core.
In addition, in the structure in which the entire upper surface of the core is covered by the leaf spring, there is also a technical problem of poor heat dissipation.

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0052] Such as Figure 1A As shown, the coil device according to one embodiment of the present invention has a case 90 and a coil assembly 10 whose lower part is accommodated inside the case 90 . Coil assembly 10, such as figure 2 As shown, there are a pair of E-shaped cores (core) 12 , a first bobbin (bobbin) 40 , and a second bobbin 50 .

[0053] A pair of E-shaped cores 12 is assembled and forms a magnetic circuit through which magnetic flux generated by a coil described later passes. These cores 12 have a symmetrical shape and are connected to each other so as to sandwich the second frame 50 and the first frame 40 from the vertical direction (the Z-axis direction in the figure).

[0054] Such as Figure 3A As shown, each of the cores 12 , 12 is a core having a substantially E-shaped longitudinal section (cut section including the Y-axis and the Z-axis). Each core 12, 12 is composed of a ferrite core, and has a plate-shaped base (base) 13, 13 extending in the Y-axis dir...

no. 2 Embodiment approach

[0121] Figure 7 as well as Figure 8 The coil assembly 10a according to the second embodiment shown is the same as that shown in FIGS. Image 6 Compared with the coil assembly according to the first embodiment shown, only the structure of the second bobbin 50a is different, and the others are the same, and the different parts will be described below.

[0122] In this coil assembly 10a, one or more partition walls 56 are formed in the middle of the winding axis direction of the second bobbin, and the second winding portion 55 is divided into two or more divisions along the winding axis direction. 57. In each section 57 , normal winding is performed on the second winding wires 321 to 32k and 32k+1 to 32n. In the partition wall 56, one or more connection grooves 56a are formed along the circumferential direction. The connection groove 56a has the same function as the connection groove 46a.

[0123] In the coil assembly 10a of this embodiment, the outer coil 30 constituting ...

no. 3 Embodiment approach

[0125] In the first embodiment, if Figure 5 As shown, with respect to the center of the winding axis direction in the first winding portion 45, the center position of the winding axis direction in the second winding portion 55 is butted against, but not only this, but also can be as Figure 9A Configure as shown. In the coil assembly 10 b according to this embodiment, the lower end of the second winding portion 55 can be positioned relative to the lower end position of the first winding portion 45 in the direction of the winding axis.

[0126] By doing so, it is expected that the heat radiation effect from the coils 20 and 30 will be improved. The reason for this is that the heat transfer characteristics from not only the coil 20 but also the coil 30 are improved by providing the heat radiating portion at the lower end portion of the coil assembly 10 b. Also, in Figure 9A In the illustrated embodiment, the first winding wire 22 ( 221 to 22 n ) is wound from the upper end ...

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Abstract

The invention provides a coil device which can reliably retains all chips and is excellent in radiation. A core has a segmentation chip which is segmented along the first axis in the first axis, the second axis and the third axis which are perpendicular to each other; a spring member is installed within the housing and pushes and presses the segmentation chip below the third axis; the spring member is provided with a gap along the second axis direction and forms a first pressing sheet and a second pressing sheet which are formed by contacting with the bending parts of all segmentation chips and deviating along the second axis direction.

Description

technical field [0001] The present invention relates to a coil device that can be suitably used as a reactor, a transformer, or the like. Background technique [0002] A coil device used as a reactor, a transformer, etc. is resin-sealed, for example as shown in the following patent document 1. [0003] On the other hand, as a core of a relatively large coil device used in applications such as vehicles, the use of an E-shaped core has been studied for reasons of size reduction, noise reduction, cost reduction, and operability. [0004] However, in the case of using an E-type core, the present inventors have found that there is a concentration of thermal stress due to a difference in heat dissipation between the center column of the core and the outer column of the core and the generation of a temperature difference. There is a technical problem that cracks are likely to occur at the intersection of the center column of the core and the base. [0005] Therefore, the inventor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H01F27/30H01F27/24
Inventor 岩仓正明小林一三
Owner TDK CORPARATION