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High-frequency transformer with heat conduction structure and manufacturing method thereof

A high-frequency transformer and heat-conducting structure technology, applied in the field of transformers, can solve the problems of large temperature gradient from the surface of the transformer to the core, high temperature inside the transformer, and poor thermal conductivity, so as to improve the external heat exchange efficiency, improve thermal performance, The effect of improving the internal thermal conductivity

Pending Publication Date: 2018-04-24
高俊 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heating of the transformer comes from its internal winding loss and magnetic core loss. Due to the poor thermal conductivity of structural materials such as the transformer skeleton, the air convection is not smooth due to the closed space formed between the windings inside the transformer, resulting in a large temperature gradient from the surface of the transformer to the core. Causes the internal temperature of the transformer to be too high during operation
[0003] Conventional transformers improve their heat dissipation performance by improving the external heat transfer method or filling thermal conductive glue. However, these methods have limited effects on improving the steady-state heat flow distribution of the transformer and reducing the internal thermal resistance of the transformer, and the flexibility is low.

Method used

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  • High-frequency transformer with heat conduction structure and manufacturing method thereof
  • High-frequency transformer with heat conduction structure and manufacturing method thereof
  • High-frequency transformer with heat conduction structure and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see figure 1 , figure 2 and image 3 , this embodiment is a preferred structural scheme of a high-frequency transformer with a heat-conducting structure. The high-frequency transformer is designed to have a rated power of 7.5kW, and the structure includes: a first magnetic core 11, a second magnetic core 12, and a primary winding bobbin 21 , the secondary winding skeleton 22, the primary winding 31, and the secondary winding 32.

[0040] The middle part of the primary winding bobbin 21 has a hole through it, and is used for accommodating the magnetic core leg of the first magnetic core 11 . A primary winding 31 is wound on the outer surface of the primary winding bobbin 21 . The secondary winding bobbin 22 has a hole in the middle and passes through it, for accommodating the primary winding bobbin 21 and its magnetic core legs. A secondary winding 32 is wound on the outer surface of the secondary winding bobbin 22 . That is, multiple sets of winding bobbins are se...

Embodiment 2

[0052] see Figure 4 , Figure 5 , this embodiment is a preferred structural scheme of a high-frequency transformer with a heat-conducting structure. The basic structure of the high-frequency transformer is the same as that of Embodiment 1, including: a first magnetic core 11, a second magnetic core 12, and a primary winding bobbin 21, the secondary winding skeleton 22, the primary winding 31, and the secondary winding 32.

[0053] The high-frequency transformer has a heat conduction structure inside, and the heat conduction structure includes a connected heat conduction structure and an end heat conduction structure. The connected heat conduction structure is assembled and embedded inside the winding frames 21 and 22 , and the connected heat conduction structure runs through each layer of the winding frames 21 and 22 , so it is called a connected heat conduction structure. The connected heat-conducting structure has a certain width and thickness and a specific cross-section...

Embodiment 3

[0063] see Image 6 , this embodiment is a preferred structural scheme of a high-frequency transformer with a heat-conducting structure. The basic structure of the high-frequency transformer is the same as that of Embodiment 1 and Embodiment 2, including: a first magnetic core 11, a second magnetic core 12, The primary winding bobbin 21 , the secondary winding bobbin 22 , the primary winding 31 , and the secondary winding 32 .

[0064] In this embodiment, the primary winding 31 and the secondary winding 32 are wound on two sets of primary winding bobbins 21 and secondary winding bobbins 22 respectively in a cross-winding manner. The core leg of the core 12 is wound sequentially from the inside to the outside according to the order of "primary side - secondary side - primary side - secondary side", and the winding bobbin is also in accordance with "primary side bobbin - secondary side bobbin - primary side bobbin - secondary side bobbin "The order of suits. Both the winding f...

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Abstract

The present invention relates to the field of transformers, and discloses a high-frequency transformer with a heat conduction structure. The high-frequency transformer comprises magnetic cores (11, 12), wherein the magnetic cores (11, 12) have magnetic core columns; winding skeletons (21, 22), wherein the magnetic core columns are sleeved with the winding skeletons (21, 22); windings (31, 32), wherein the windings (31, 32) are wound on the winding skeletons (21, 22); and a heat conduction structure jointed with multiple layers of the winding skeletons (21, 22). The present invention also correspondingly discloses a manufacturing method of the high-frequency transformer with the heat conduction structure. Thermal path thermal resistance in the transformer can be significantly reduced, the internal heat conduction capability is improved, internal temperature rise of the transformer due to winding loss and magnetic core loss is reduced, and internal temperature peak of the transformer isreduced.

Description

technical field [0001] The invention relates to the field of transformers, and more specifically, to a transformer with an internal heat conduction structure and a manufacturing method thereof. Background technique [0002] As the main component of switching power supply, high-frequency transformer is the main device to realize energy conversion and transmission. At present, it is developing towards smaller size, higher power and efficiency, better stability and reliability. A typical high-frequency transformer structure consists of a magnetic core group, a winding support frame and primary and secondary windings. The primary and secondary windings are multi-turn layered and wound on the bobbin, and the bobbin is nested on the core column of the magnetic core to form a coaxial structure. The heating of the transformer comes from its internal winding loss and magnetic core loss. Due to the poor thermal conductivity of structural materials such as the transformer skeleton, th...

Claims

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Application Information

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IPC IPC(8): H01F27/30H01F27/22H01F19/04H01F41/00
CPCH01F19/04H01F27/22H01F27/2876H01F27/306H01F41/00
Inventor 饶波张正卿周松高俊聂中
Owner 高俊
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