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Production method of high-volage coil of voltage mutual inductor

A technology of voltage transformers and high-voltage coils, applied in the direction of inductors, transformers/inductor coils/windings/connections, coil manufacturing, etc. Ensure the stability and reliability of mechanical and electrical insulation performance, reasonable coil insulation structure, and uniform electric field distribution

Active Publication Date: 2013-07-24
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the enameled wires are arranged in the coil winding process, the film winding is uneven, and the coils have bulges and wrinkles, it will not only affect the electrical insulation performance of the product, but also may cause the axial movement of the coil during the production and transportation process, reducing the product’s reliability. operational reliability
When the defect is serious, it may even cause the product to explode, seriously affecting the safety of the system operation

Method used

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  • Production method of high-volage coil of voltage mutual inductor
  • Production method of high-volage coil of voltage mutual inductor
  • Production method of high-volage coil of voltage mutual inductor

Examples

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preparation example Construction

[0034] The preparation method of the voltage transformer high-voltage coil of the present invention, according to the following steps:

[0035] (1) Winding on the outer surface of skeleton 3 with film 5 earlier;

[0036] (2) Fix the enameled wire 4 on the film 5 with electrical tape.

[0037] (3) Set aside a sufficient length of enameled wire 4 for the lead wire 2 at the low-voltage end of the coil;

[0038] (4) Use the enameled wire 4 to uniformly wind the coil along the axial direction of the skeleton 3, and wrap the film 5 between every two layers of enameled wire.

[0039] (5) After the enameled wire 4 has reached the prescribed number of turns, the film 5 is wrapped around it.

[0040] (6) Lead out the end of the enameled wire 4 as the lead wire 1 at the high voltage end.

[0041] (7) Put the wound coil into an oven for drying and curing.

[0042] In the step (1), the number of winding layers of the film 5 is 3 layers.

[0043] In the step (2), the distance between t...

Embodiment 1

[0049]Embodiment 1: first use film 5 to wind 3 layers on the outer surface of skeleton 3, wire 4 is fixed on film 5 with electrical tape at 30 mm from the end of film 5, and the lead-out length of 200 mm is used as low-voltage end lead-out line 2; Wrinkles and bulges occur when the coil is wound, and the wires 4 are wound in a uniform arrangement along the coil axis in an "S" shape, that is, each layer of wires can only proceed to the next layer after winding the specified number of turns. Winding, 2 to 6 layers of film 5 are wrapped between each 2 layers of wires to meet the requirements for interlayer insulation; in the prior art, each layer is wound with half the number of turns of wire, two layers of film are wound, and then the other half of the turn is wound number of wires, and then wind two layers of film, so that the coils in the middle are easy to bulge, loosen, and the film and wires move; each layer of wires in the present invention can only be rolled to the next la...

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Abstract

The invention discloses a high-voltage coil of a voltage mutual inductor and a production method thereof. The high-voltage coil of the voltage mutual inductor comprises a framework, leads and thin films, wherein a coil is wound on the framework, 2-6 layers of films are wound between adjacent lead layers, and the winding turn of the lead on the outer layer is 1-2 less than that of the adjacent lead on the inner layer. According to the invention, coil bulge, loose and moving of the thin films and the leads can be effectively avoided by modifying the arrangement of the leads, selecting the pathsof the leads, and reasonably controlling the voltage when the leads and the thin films are wound. The whole coil section is of a trapezoid laminated insulation structure with a breadth gradually reduced from bottom up; the high-voltage coil is reasonable and compact in insulation structure and small in size, the distribution of electric fields is uniform, and the coil has strong mechanical strength; therefore, the coil is not easy to deform under the action of external force in assembly, transportation and using processes, and the mechanical and electrical insulation performances of the high-voltage coil can be kept stable and reliable.

Description

【Technical field】 [0001] The invention belongs to the field of high-voltage electrical appliances, and relates to a voltage transformer and a preparation method thereof, in particular to a voltage transformer high-voltage coil and a preparation method thereof. 【Background technique】 [0002] As one of the important components of high-voltage equipment in power systems, voltage transformers are divided into two types: measurement and protection. In high-voltage and ultra-high-voltage power systems, the commonly used electromagnetic voltage transformer adopts a single-stage structure, and the high voltage in the system is all borne by the high-voltage coil. Therefore, the geometric dimensions of the high-voltage coil of the voltage transformer are very large, especially the radial dimension of the coil. If the enameled wires are arranged in the coil winding process, the film winding is uneven, and the coils have bulges and wrinkles, etc., it will not only affect the electrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H01F27/30H01F41/04H01F38/24
Inventor 杨育京王传川
Owner CHINA XD ELECTRIC CO LTD
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