CN110853895A

CN110853895A - Transformer winding

Info

Publication number: CN110853895A
Application number: CN201911151273.5A
Authority: CN
Inventors: 黄光炎; 何艳明; 蒙丹丹
Original assignee: Guiyang Aviation Electrical Machinery Co Ltd
Current assignee: Guiyang Aviation Electrical Machinery Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-02-28

Abstract

The invention discloses a transformer winding, which comprises a transformer, wherein the transformer comprises a coil framework, two layers of enameled wire windings are wound on the outer surface of the coil framework, a first copper strip winding and a second copper strip winding are respectively arranged between the two layers of enameled wire windings, and the first copper strip winding and the second copper strip winding are wound on the coil framework. The invention can quickly conduct the heat in the transformer, greatly reduces the temperature in the transformer, reduces the volume and the weight of the transformer, thereby improving the heat dissipation efficiency of the transformer and the heat dissipation effect of the transformer, and solving the problems of poor heat dissipation effect and low heat dissipation efficiency of the transformer.

Description

Transformer winding

Technical Field

The invention relates to the technical field of aviation power supply transformation, in particular to a technology for winding a transformer winding by using copper foil for a high-power 12-pulse isolated type voltage transformation rectifier, and specifically relates to a transformer winding structure wound by using copper foil.

Background

With the development of aviation power supply conversion technology, the requirements on the volume and the weight of an AC/DC variable power supply are higher and higher, a transformer is a device for changing alternating voltage by using the principle of electromagnetic induction, main components are a primary coil, a secondary coil and an iron core, and the transformer has the following main functions: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, and the like, and the transformer comprises a transformer winding structure.

In the use process of the existing transformer winding structure, because the transformer winding structure generates high temperature during operation, the generated temperature exceeds the limit temperature of an insulating material; meanwhile, with the reduction of the volume and the weight of the winding of the existing transformer, the temperature inside the transformer is very high, so that the overall heat dissipation effect and the heat dissipation efficiency of the transformer are poor, and the service life of the transformer is influenced.

Disclosure of Invention

The present invention is directed to a transformer winding to solve the problems of poor overall heat dissipation effect and low heat dissipation efficiency of the transformer proposed in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the transformer comprises a transformer body, wherein the transformer body comprises a coil framework, the outer surface of the coil framework is wound with two layers of enameled wire windings, a first copper strip winding and a second copper strip winding are arranged between the two layers of enameled wire windings respectively, and the first copper strip winding and the second copper strip winding are wound on the coil framework.

Preferably, a winding insulation film is arranged between the first copper strip winding and the second copper strip winding, and the winding insulation film is used for enabling the copper strip windings to be coupled more tightly.

Preferably, the first copper strip winding is formed by winding a first copper foil, and the second copper strip winding is formed by winding a second copper foil.

Preferably, a copper foil insulation film is arranged between the first copper foil and the second copper foil, and the copper foil insulation film is used for electric isolation between the first copper foil and the second copper foil.

Preferably, bus bars are welded to two ends of the first copper foil and two ends of the second copper foil respectively and are used for facilitating connection of the transformer and external electrical equipment.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention can conduct the heat in the transformer, and then dissipate the heat in the transformer by external air cooling or conduction heat dissipation, thereby greatly reducing the temperature in the transformer, reducing the volume and weight of the transformer, improving the heat dissipation efficiency of the transformer, prolonging the service life of the transformer winding and the transformer, solving the problems of poor heat dissipation effect and low heat dissipation efficiency of the transformer, and being beneficial to the popularization and the use of the transformer winding structure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure at A of FIG. 1 according to the present invention.

In the figure: 1 transformer, 11 winding skeletons, 12 enameled wire windings, 13 first copper strip windings, 131 first copper foils, 14 second copper strip windings, 141 second copper foils, 15 winding insulation films and 16 copper foil insulation films.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the transformer comprises a transformer 1, wherein the transformer 1 comprises a coil framework 11, two layers of enameled wire windings 12 are wound on the outer surface of the coil framework 11, a first copper strip winding 13 and a second copper strip winding 14 are respectively arranged between the two layers of enameled wire windings 12, and the first copper strip winding 13 and the second copper strip winding 14 are wound on the coil framework 1; wherein the enameled wire winding 12 adopts any one of polyester enameled wire, polyurethane enameled wire and polyimide enameled wire winding; a winding insulation film 15 is arranged between the first copper strip winding 13 and the second copper strip winding 14, and the winding insulation film 15 is used for enabling the copper strip windings to be coupled more tightly; the first copper strip winding 13 is formed by winding a first copper foil 131, and the second copper strip winding 14 is formed by winding a second copper foil 141; a copper foil insulation film 16 is disposed between the first copper foil 131 and the second copper foil 141, and the copper foil insulation film 16 serves as electrical isolation between the first copper foil 131 and the second copper foil 141.

Bus bars are welded at two ends of the first copper foil 131 and two ends of the second copper foil 141 respectively, wherein the bus bars comprise any one of SP1-41A/1P type bus bars, SP1-41A/2P type bus bars and SP1-63A/3P type bus bars; the bus bar is used for facilitating the connection of the transformer 1 with external electrical equipment; the external electrical equipment includes a conventionally used QT-SR type air-cooled radiator.

The copper foil has the characteristics of high electrical conductivity, high thermal conductivity, corrosion resistance, proper strength and easy processing formability; the first copper strip winding 13 wound by the first copper foil 131 and the second copper strip winding 14 wound by the second copper foil 141 can conduct heat inside the transformer 1 by utilizing the high heat conduction, heat resistance and high temperature resistance of the copper foils, and then dissipate the heat inside the transformer through external air cooling or heat conduction.

The insulating film of the copper foil insulating film 16 and the winding insulating film 15 adopts any one or two of a polyester film, a polypropylene film, a polytetrafluoroethylene film, a polyimide film and a polyimide-perfluoroethylene-propylene composite film; the copper foil insulation film 16 and the winding insulation film 15 have the advantages of thin thickness, flexibility, moisture resistance, high temperature resistance, high dielectric property, mechanical property and chemical stability.

The contact area between the first copper foil 131 and the second copper foil 141 is large, heat inside the transformer winding is more easily conducted to the surface of the transformer 1, and then the heat is conducted to a radiator through other cooling modes such as air cooling of the surface of the transformer 1 or adoption of a bus bar, so that the temperature of the transformer winding can be easily reduced, and the cooling effect is obvious; the copper foil insulating film 16 between the first copper foil 131 and the second copper foil 141 is a single-layer insulating film; the copper foil insulating film 15 between the first copper strip winding 13 and the second copper strip winding 14 is at least two layers of insulating films.

The working principle is as follows: the enameled wire winding 12, the first copper strip winding 13 and the second copper strip winding 14 are wound on the coil skeleton 11, the enameled wire winding 12 is wound on the coil skeleton 11, the first copper strip winding 13 and the second copper strip winding 14 are arranged between the two layers of enameled wire windings 12, the winding insulation film 15 is arranged between the first copper strip winding 13 and the second copper strip winding 14, the first copper strip winding 13 is formed by winding a first copper foil 131, the second copper strip winding 14 is formed by winding a second copper foil 141, and the copper foil insulation film 16 is arranged between the first copper foil 131 and the second copper foil 141.

The copper strip winding made by winding the copper foil is adopted, the high heat conduction, heat resistance and high temperature resistance of the copper foil can be utilized, the heat inside the transformer 1 is conducted out, the heat inside the transformer is dissipated by external air cooling or heat dissipation conduction, the temperature inside the transformer is greatly reduced, the size and the weight of the transformer 1 are reduced, the heat dissipation efficiency of the transformer 1 is improved, the service lives of the transformer winding and the transformer 1 are prolonged, the problems of poor heat dissipation effect and low heat dissipation efficiency of the transformer 1 are solved, and the popularization and the use of the transformer winding structure are facilitated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A transformer winding comprising a transformer (1), characterized in that: the transformer (1) comprises a coil frame (11), wherein two layers of enameled wire windings (12) are wound on the outer surface of the coil frame (11), a first copper strip winding (13) and a second copper strip winding (14) are arranged between the two layers of enameled wire windings (12) respectively, and the first copper strip winding (13) and the second copper strip winding (14) are wound on the coil frame (1).

2. The transformer winding of claim 1, wherein: and a winding insulation film (15) is arranged between the first copper strip winding (13) and the second copper strip winding (14), and the winding insulation film (15) is used for enabling the copper strip windings to be coupled more tightly.

3. The transformer winding of claim 1, wherein: the first copper strip winding (13) is formed by winding a first copper foil (131), and the second copper strip winding (14) is formed by winding a second copper foil (141).

4. A transformer winding according to claim 3, wherein: a copper foil insulating film (16) is arranged between the first copper foil (131) and the second copper foil (141), and the copper foil insulating film (16) is used for electric isolation between the first copper foil (131) and the second copper foil (141).

5. A transformer winding according to claim 3, wherein: the bus bars are welded to the two ends of the first copper foil (131) and the two ends of the second copper foil (141) respectively and used for facilitating connection of the transformer (1) and external electrical equipment.