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Heart-type transformer with interleaved windings

A transformer, interlaced technology, applied in the field of new transformers, can solve the problems of complex magnetic flux distribution in the iron core, high cost of shell-type transformers, unbalanced three-phase line voltage, etc., and achieve good natural cooling performance, convenient installation of lead wires, and extreme The effect of large capacity

Active Publication Date: 2021-10-22
孙崇山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The disadvantages of shell-type transformers are that the cost is too high, the magnetic flux distribution in the iron core is complicated, and the three-phase line voltage is easy to be unbalanced.

Method used

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  • Heart-type transformer with interleaved windings
  • Heart-type transformer with interleaved windings
  • Heart-type transformer with interleaved windings

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0074] Example 1, S13—400 / 10±2×0.25% / 0.4

[0075] National standard: load loss Pk=4200W

[0076] No-load loss P0=410W

[0077] No-load current percentage I0%=0.8%

[0078] Impedance voltage percentage Uk%=4%

[0079] Total loss P=4930 W

[0080] 1. New transformer S13—400 / 10±2×0.25% / 0.4

[0081] Design scheme: the cross section of the core winding is oblong

[0082] The ratio of the length and length of the core to the short axis is 1:1.49, the diameter of the small circle of the core is Φ155mm, the main stage of the core is thickened by 33mm, and the cross-sectional area of ​​the core is 280.006cm 2 . Core flux density Bm=1.546T, M0=255mm, Hw=400mm.

[0083] Winding structure: staggered, six magnetic balance groups.

[0084] High-voltage winding: It is a disc winding with a flattened structure, and the number of turns is 630 turns, 600 turns, and 570 turns. Wire gauge ZB—0.32.12×4. Each double magnetic balance group has 15 turns / layer, a total of 15 layers.

[0085...

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Abstract

The invention is a novel transformer. Combining the structural advantages of the current shell-type transformers and core-type transformers, it can completely replace the current shell-type and core-type transformers. The cost is greatly reduced, and the pass rate of sudden short circuit test is basically 100%. The cooling effect of the transformer winding is good, the overload capacity is strong, the ultimate capacity is large, and the transportation is convenient. The advantages of ultimate capacity are better than shell type. When vertical transportation is inconvenient, it can be transported upside down to reduce the transportation height. Compact structure, small appearance, light overall weight, compact structure, easy installation of leads, uniform capacitance distribution, reliable insulation, strong ability to resist lightning strikes and operating overvoltage.

Description

technical field [0001] The invention is a novel transformer. Combining the structural advantages of the current shell-type transformers and core-type transformers, it can completely replace the current shell-type and core-type transformers. Background technique [0002] A transformer is one of the most important electrical equipment used in power grids and power systems. It is mainly composed of iron cores and windings (also called coils). According to the classification of core and winding structure, transformers can be divided into two types: core type and shell type. [0003] The basic structure of a heart-type transformer is as follows: figure 1 As shown (three-phase), the cross-section of the iron core column is circular, the placement method is vertical, and the coil section is also circular. arrangement. The cross-section of the core column is made of multi-level core sheets with different widths and thicknesses. The circumscribed shape of the core column section ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H01F27/245H01F27/12H01F30/12
Inventor 孙崇山
Owner 孙崇山
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