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Winding method of a rectangular pie coil

A pie-shaped coil and winding method technology, which is applied in the manufacture of coils, electrical components, inductors/transformers/magnets, etc., can solve the problems of loose wire cakes, difficult elimination of bending lines, and difficulty in reaching the size

Active Publication Date: 2016-05-11
CHONGQING XIANGLONG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These bending lines are difficult to eliminate; due to the existence of bending lines, the wound coils are loose (not pulled tightly) when the cake is turned, and it is difficult to reach the size required by the drawing

Method used

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  • Winding method of a rectangular pie coil
  • Winding method of a rectangular pie coil

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] Such as figure 1 with figure 2 As shown, take the winding method of manufacturing a rectangular pie coil with a voltage level of 10kV as an example:

[0020] The first step is to determine the number of wire cakes and the length of flat wire required for each cake under the condition that the partial discharge is controlled to be less than 5Pc through field strength calculation;

[0021] The second step, the requirements for manufacturing flat wires: Wind a layer of insulating film on the flat wires in a half-stacked manner, and wrap non-woven fabrics outside the insulating film, so that the insulation thickness composed of insulating films and non-woven fabrics is 0.3-0.4mm ;

[0022] The third step is to install the auxiliary mold: install the auxiliary mold 2 and the auxiliary mold 3 on the side plane part of the rectangular mold 1, the auxiliary mold 2 and the auxiliary mold 3 are crescent-shaped, and the arc surface of the auxiliary mold and the rounded corner o...

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Abstract

The invention discloses a method for winding of a rectangular pie type coil. The method comprises the steps that a, the length of each coil is determined; b, an auxiliary mold is installed, the auxiliary mold is installed on the side plane portion of a rectangular mold, and the auxiliary mold is made to be attached to the rectangular mold, so that an irregular oval winding mold is formed; c, odd pies are wound; d, the odd pies are turned over; e, the auxiliary mold is moved; f, even pies are wound; g, the step c to the step f are repeated until manufacturing of the whole coil is completed. When the method is used, bent points generated on the rectangular pie type coil when the coil is wound on the rectangular mold are eliminated, so that the wound coil pie is compact and firm and the dimension required by a drawing is achieved.

Description

technical field [0001] The invention relates to the field of dry-type transformer manufacture, in particular to a winding method of a rectangular pie coil. Background technique [0002] Amorphous alloy dry-type transformers have the advantages of energy saving, environmental protection, and low operating costs. The main reason is that the no-load loss is 60% to 70% lower than that of transformers made of silicon steel sheets. Therefore, the operating costs are low and the comprehensive benefits are good. It is very popular in power systems Get promoted soon. The high-voltage coils used in this kind of transformer are segmented multi-layer cylindrical coils, the interlayer and intersegment insulation layers are thicker, and the filling factor is low; now a pie coil is used, which cancels the interlayer insulation and intersegment insulation. The use of insulation reduces the amount of auxiliary materials and main materials, improves the filling factor of the product, and red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/063H01F41/074H01F41/12H01F41/071
Inventor 丁德伟
Owner CHONGQING XIANGLONG ELECTRIC