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Transformer coil based on composite conductor

A technology of transformer coils and combined conductors, applied in the field of transformer manufacturing, can solve the problems of high eddy current loss, hot spot temperature rise at the head and end of the coil, etc., and achieve the effect of reducing eddy current loss

Inactive Publication Date: 2015-07-22
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] figure 1 In the prior art, the coil is wound with combined wires in the width direction. Although the coil wound with combined wires in the width direction can greatly reduce the eddy current loss caused by the axial magnetic leakage in the coil, there is a transverse magnetic flux leakage at the coil head and end. The eddy current loss generated in the coil by the transverse flux leakage is high, so that the temperature rise of the hot spot at the head and end of the coil is high

Method used

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  • Transformer coil based on composite conductor
  • Transformer coil based on composite conductor
  • Transformer coil based on composite conductor

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Embodiment Construction

[0012] The general idea of ​​the present invention is that the middle part of the coil is wound by the composite wire in the amplitude direction, and the end of the coil is wound by the composite wire in the axial direction, thereby reducing the eddy current loss of the coil and the temperature rise of the hot spot at the end of the coil.

[0013] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

[0014] figure 2 It is a partial cross-sectional view of a transformer coil based on a composite wire provided in an embodiment of the present invention.

[0015] refer to figure 2 , the coil includes a coil middle and a coil end, the coil middle is wound by the amplitude composite wire 2, and the coil end is wound by the axial composite wire 1, and the coil end includes a coil head and a coil end.

[0016] image 3 A front view of the combined wire connection provided by the embodiment o...

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Abstract

Provided is a transformer coil based on a composite conductor. The middle portion of the coil is wound through a radial composite conductor. The end of the coil is wound through an axial composite conductor. The radial composite conductor and the axial composite conductor are welded in a lap-joint mode, and accordingly the eddy-current loss of the coil and temperature rising at the end of the coil are lowered.

Description

technical field [0001] The invention relates to the field of transformer manufacturing, in particular to a transformer coil based on combined conductors. Background technique [0002] For transformer coils with large currents, paper-covered wires with larger specifications are usually used for winding, and the eddy current loss caused by the axial leakage of the wire cake will increase by winding the paper-covered wires. [0003] figure 1 It is a coil wound with an amplitude combined wire in the prior art. Although the coil wound by the amplitude combined wire can greatly reduce the eddy current loss caused by the axial flux leakage in the coil, there is lateral flux leakage at the head and end of the coil. The eddy current loss in the coil caused by the lateral leakage flux is high, so that the temperature rise of the hot spot at the head and end of the coil is high. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a transformer coil ...

Claims

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Application Information

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IPC IPC(8): H01F27/28H01F27/30
Inventor 张鹏宇杨国斌李晋峰卢文华孙浩张伟田颢亮王寅炜花金荣
Owner STATE GRID CORP OF CHINA