CN-116825507-B - Balanced winding of transformer

CN116825507BCN 116825507 BCN116825507 BCN 116825507BCN-116825507-B

Abstract

The invention provides a transformer balance winding, which comprises a transformer body, a first transformer body, a second transformer body, a first balance winding, a second balance winding, a first balance winding connecting wire and a second balance winding connecting wire, wherein the first transformer body and the second transformer body are arranged in the transformer body, a first part of the first balance winding is wound on the first transformer body, a second part of the first balance winding is wound on the second transformer body, a first part of the second balance winding is wound on the first transformer body, a second part of the second balance winding is wound on the second transformer body, the first part of the first balance winding is connected with the second part of the second balance winding through the first balance winding connecting wire, and the first part of the second balance winding is connected with the second part of the second balance winding through the second balance winding connecting wire. In the invention, two groups of balance windings are added to ensure that the magnetic fluxes of iron cores of the two bodies are more balanced, and the output voltage at the low voltage side is more balanced and stable.

Inventors

LU GUANGHUI
LIU BO
CHEN YANLING
BAI JIANPIN
PAN JUN

Assignees

特变电工智能电气有限责任公司
天津珠峰硅钢股份有限公司
特变电工京津冀智能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20230629

Claims (7)

1. A transformer balance winding, comprising: The transformer comprises a transformer body, a first transformer body, a second transformer body, a first balance winding, a second balance winding, a first balance winding connecting wire and a second balance winding connecting wire; the first transformer body and the second transformer body are arranged in the transformer body, a first part of the first balance winding is wound on the first transformer body, a second part of the first balance winding is wound on the second transformer body, a first part of the second balance winding is wound on the first transformer body, a second part of the second balance winding is wound on the second transformer body, the first part of the first balance winding and the second part of the first balance winding are connected through the first balance winding connecting wire, and the first part of the second balance winding and the second part of the second balance winding are connected through the second balance winding connecting wire; The first end of the first balance winding is connected with the first end of the second part of the first balance winding, the tail end of the first part of the first balance winding is connected with the tail end of the second part of the first balance winding, the first end of the first part of the second balance winding is connected with the first end of the second part of the second balance winding, the tail end of the first part of the second balance winding is connected with the tail end of the second part of the second balance winding, and a loop is formed between the first part of the first balance winding and the second part of the first balance winding; the number of turns of the first balance winding and the second balance winding are the same as the winding mode; the first balance winding comprises a head end of a first part of the first balance winding, a head end of a second part of the first balance winding, a tail end of the first part of the first balance winding and a tail end of the second part of the first balance winding; the second balance winding includes a head-end tap of a first portion of the second balance winding, a head-end tap of a second portion of the second balance winding, a tail-end tap of the first portion of the second balance winding, and a tail-end tap of the second portion of the second balance winding.
2. The transformer balancing winding of claim 1, further comprising: The first transformer body comprises a first iron core, a first part of the first balance winding and a first part of the second balance winding are wound on the first iron core respectively; the second transformer body includes a second core on which the second portion of the first balance winding and the second portion of the second balance winding are wound, respectively.
3. The transformer balance winding of claim 2, wherein, The first core and the second core are the same in size and structure.
4. The transformer balance winding of claim 2, wherein, The first iron core comprises a first upper iron yoke and a first lower iron yoke, and a first part of the first balance winding and a first part of the second balance winding are wound on the first upper iron yoke or the first lower iron yoke respectively; the second iron core comprises a second upper iron yoke and a second lower iron yoke, and the second part of the first balance winding and the second part of the second balance winding are wound on the second upper iron yoke or the second lower iron yoke respectively.
5. The transformer balancing winding of claim 4, further comprising: The first transformer body further comprises a first iron core column, wherein the first iron core column is arranged between the first upper iron yoke and the first lower iron yoke, and a first main coil is placed on the first iron core column; The second transformer body further comprises a second iron core column, wherein the second iron core column is arranged between the second upper iron yoke and the second lower iron yoke, and a second main coil is placed on the second iron core column.
6. The transformer balance winding of claim 5, wherein, The first iron core leg comprises three first sub-iron core legs respectively arranged between the first upper iron yoke and the first lower iron yoke; The second core leg includes three second sub-core legs disposed between the second upper and lower yokes, respectively.
7. The transformer balancing winding of claim 2, further comprising: The insulation layers are respectively arranged between the first balance winding and the first iron core of the first transformer body and the second iron core of the second transformer body, and between the second balance winding and the first iron core of the first transformer body and the second iron core of the second transformer body.

Description

Balanced winding of transformer Technical Field The embodiment of the invention relates to the technical field of transformer manufacturing, in particular to a transformer balance winding. Background With the sustainable development of the transformer industry in China, particularly the development of the infrastructure such as domestic metal smelting forging, cement processing, papermaking and the like, the number of special transformers such as required rectifier transformers is increased year by year, and the special transformers have special structures, so that the requirements on the performance parameters of the special transformers are very strict. In particular, for a rectifier transformer with two transformers connected in series on the high voltage side, since this type of transformer is constituted by two independent transformers, this structural disadvantage results in a very poor balance of the output voltages of the secondary windings of the two transformers. The reason for the very poor balance of the output voltages of the secondary side windings of the two transformer bodies is mainly that the first reason is that the inherent characteristics of the type of transformer are caused, so that no-load voltages of the two secondary windings always have certain deviation, the deviation cannot be eliminated fundamentally due to the inherent structure of the type of transformer, the deviation can be reduced only by adjusting the turn ratio of the two secondary windings to be as close as possible to the relationship of 3 times, the second reason is that after the two transformer bodies are connected in series, the unbalance is increased due to the fact that the magnetic resistances of the magnetic circuits of the two iron cores in the two transformer bodies are different and the difference is large, in addition, the iron cores in each single transformer body are of a three-phase three-column structure, the magnetic circuit of the two core columns beside is larger in magnetic resistance, the magnetic circuit of the middle core column is shorter in magnetic resistance and smaller, the unbalance of no-load voltages of the two secondary windings is further increased, so that the unbalance between no-load voltages of the two secondary windings is difficult to meet protocol parameter requirements, the influence on rectifying equipment of the later stages of the transformer is caused, and the quality of products is influenced. Disclosure of Invention The embodiment of the invention provides a transformer balance winding, which is used for solving the problem that no-load voltage output by a low-voltage side is unbalanced after the high-voltage sides of two existing transformer bodies are connected in series. In order to solve the technical problems, the invention is realized as follows: In a first aspect, an embodiment of the present invention provides a transformer balance winding, including: The transformer comprises a transformer body, a first transformer body, a second transformer body, a first balance winding, a second balance winding, a first balance winding connecting wire and a second balance winding connecting wire; The first transformer body and the second transformer body are arranged in the transformer body, a first part of the first balance winding is wound on the first transformer body, a second part of the first balance winding is wound on the second transformer body, a first part of the second balance winding is wound on the first transformer body, a second part of the second balance winding is wound on the second transformer body, a first part of the first balance winding and a second part of the first balance winding are connected through a first balance winding connecting wire, and a first part of the second balance winding and a second part of the second balance winding are connected through a second balance winding connecting wire. Optionally, the head end of the first part of the first balance winding is connected with the head end of the second part of the first balance winding, the tail end of the first part of the first balance winding is connected with the tail end of the second part of the first balance winding, the head end of the first part of the second balance winding is connected with the head end of the second part of the second balance winding, the tail end of the first part of the second balance winding is connected with the tail end of the second part of the second balance winding, a loop is formed between the first part of the first balance winding and the second part of the first balance winding, and a loop is formed between the first part of the second balance winding and the second part of the second balance winding. Optionally, the number of turns and the winding manner of the first balance winding and the second balance winding are the same. Optionally, the first balance winding comprises a head end of a first part of the first balance winding, a head end of a secon