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Transformer and transformer production method

A technology for transformers and magnetic cores, which is applied in the manufacture of inductors/transformers/magnets, transformers, transformers/inductor shells, etc. It can solve the problems of increased number of components, increased manufacturing costs, and cumbersome manufacturing processes, etc., to reduce manufacturing costs, The effect of reducing man-hours

Inactive Publication Date: 2006-05-03
SUMIDA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional transformer described in Patent Document 1, it is necessary to interpose a heat conduction layer made of a silicone resin layer or the like between the primary coil and the secondary coil. As a result, the number of parts increases, and the manufacturing process is complicated. The problem of rising manufacturing costs

Method used

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  • Transformer and transformer production method
  • Transformer and transformer production method
  • Transformer and transformer production method

Examples

Experimental program
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Embodiment approach

[0061] In addition, the first magnetic core 20 and the second magnetic core 30 are formed of ferrite, but the material for forming the magnetic core is not limited to this, and can also be selected from other common magnetic core materials. Materials such as molybdenum alloy, sendust, carbonyl iron, etc. can also be used to compress and mold the molded magnetic core of the above powder.

[0062] In addition, in this embodiment, a double-leakage flux transformer having two bobbin parts 40 is specified, but it can also be used in a transformer having one bobbin part 40 or a transformer having three or more bobbin parts. transformer.

[0063] In addition, the use of the transformer of the present invention is not limited to the flux leakage transformer 10, and can be used for other types of transformers.

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Abstract

A transformer and a method for manufacturing the transformer can efficiently dissipate the heat generated inside the transformer to the outside without increasing the number of parts, and can reliably perform as designed, improve durability, and achieve cost reduction. This transformer includes a magnetic core portion that accommodates a primary coil and a secondary coil to form a magnetically closed circuit, and electromagnetic induction is performed between the coils. The magnetic core part includes: a first magnetic core having a pair of side legs standing upright from the base and at least one central leg provided in the interval between the pair of side legs; The second magnetic core arranged on the surface. A bobbin-shaped bobbin portion for winding the primary coil and the secondary coil is attached to the outer peripheral portion of the center leg. In the second magnetic core, at least one through hole is provided at a position facing a gap formed between the outer peripheral surface of the center leg and the inner peripheral surface of the bobbin when the bobbin is attached to the center leg.

Description

technical field [0001] The present invention relates to a transformer used in a power supply circuit for electronic equipment such as a backlight power circuit for a liquid crystal display, and a method for manufacturing the transformer. Background technique [0002] In a general transformer, a bobbin on which a primary coil and a secondary coil are wound is sandwiched between a pair of vertically opposing magnetic cores. Therefore, if heat is generated in the coil portion, the heat is enveloped in the magnetic core portion, not only failing to perform as designed, but also causing equipment failure in the worst case. [0003] Conventionally, in a transformer used in a power supply circuit for an electronic device, various techniques for dealing with heat generated from a coil portion have been developed. [0004] For example, a transformer is disclosed in which a heat conduction layer composed of a silicone resin layer or the like is formed between the primary coil and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/02H01F27/08H01F27/24H01F30/00H01F41/00
Inventor 斋藤正树
Owner SUMIDA CORP