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Anti-resonance voltage transformer and manufacturing method thereof

A resonant voltage, transformer technology, applied in the transformer field, can solve problems such as transformer damage, achieve the effect of simple and easy size, and avoid ferromagnetic resonance

Pending Publication Date: 2022-01-28
QUANZHOU ELECTRIC POWER TECH INST OF FUJIAN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the inductance of the electromagnetic voltage transformer is nonlinear, it is easy to excite the resonance between the electromagnetic voltage transformer and the line when the line is single-phase grounded, short-circuited between phases, or operating an empty bus, resulting in damage to the transformer

Method used

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  • Anti-resonance voltage transformer and manufacturing method thereof
  • Anti-resonance voltage transformer and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to figure 1 , an anti-resonance voltage transformer in this embodiment includes an iron core 1 and a round-shaped insulating frame 3. Specifically, the iron core 1 is a square-shaped iron core 1, and the iron core 1 is cut from a position 30 mm away from one side of the iron core 1. It is divided into two halves, A and B, so that the core 1 can pass through the center of the insulating frame 3 so that the insulating frame 3 can be set on one side of the core 1, wherein the inner diameter of the insulating frame 3 is 1 to 5 mm larger than the outer diameter of the iron core 1, ensuring The iron core 1 fits smoothly and the gap between the iron core 1 and the skeleton is small, and the overall volume of the product is small.

[0040] A secondary winding 5 is wound on the insulating frame 3, and the secondary winding 5 is formed by winding enamelled copper flat wire directly on the insulating frame 3, and three layers of insulating paper are wrapped on the sec...

Embodiment 2

[0046] Please refer to figure 2 , a method of manufacturing an anti-resonance voltage transformer in this embodiment, using enamelled copper flat wire to be directly wound on the insulating frame 3 to form a secondary winding 5, after all the secondary windings 5 ​​are wound to a specified number of turns Wind several layers of insulating paper, preferably 0.07 thick capacitor composite paper wound three layers.

[0047] After the insulating paper is wound, the primary winding 4 is directly wound. The primary winding 4 is wound in layers using enamelled copper round wires, and each layer is separated by insulating paper.

[0048] After the winding is completed, the B-section iron core 1 is penetrated into the insulating skeleton 3. A gap between the A-section iron core 1 and the B-section iron core 1 is separated by an insulating material 2 to form a fixed air gap. The air gap is preferably 1mm. After the hoisting plate 7 is placed on the opposite side of the winding, the tw...

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Abstract

The invention discloses an anti-resonance voltage transformer and a manufacturing method thereof. The anti-resonance voltage transformer comprises a square iron core, the iron core is a cut iron core with two gaps, one gap of the iron core is used as an air gap, the other gap is not used as an air gap, and the air gap is filled with an insulating material. The anti-resonance voltage transformer is characterized in that one gap of the cut-open iron core is processed to form the air gap and is filled with the insulating material to ensure that excitation current and excitation inductance are linear, so ferromagnetic resonance is avoided; and the size of the air gap is controlled by rigid connection without changing the other gap, so the size of the air gap can be simply and easily controlled through the rigid joint.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to an anti-resonance voltage transformer and a manufacturing method thereof. Background technique [0002] Due to the need of grounding protection, the three-phase voltage transformer in the distribution network is connected between the phase and the ground, and the inductance of the voltage transformer is connected in series with the capacitance of the grid line to ground to form a resonant circuit. Since the inductance of the electromagnetic voltage transformer is nonlinear, it is easy to excite the resonance between the electromagnetic voltage transformer and the line when the line is single-phase grounded, short-circuited between phases, or operating an empty bus, resulting in damage to the transformer. Contents of the invention [0003] The technical problem to be solved by the present invention is: an anti-resonance voltage transformer and its manufacturing method, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F27/32H01F41/02
CPCH01F27/24H01F27/32H01F41/02
Inventor 陈艺峰王海霞陈炳贵梁超泳李文锦黄少敏苏两河郭陆峰陈金星林培玲黄龙杰黄志良张尤波李培存柳永玉庄建煌
Owner QUANZHOU ELECTRIC POWER TECH INST OF FUJIAN ELECTRIC POWER
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