CN216719713U

CN216719713U - Transformer low pressure foil winding layer formula coil end insulation system

Info

Publication number: CN216719713U
Application number: CN202122207797.0U
Authority: CN
Inventors: 唐明珠; 李永新; 丁亚妹; 雷明明; 孟坤
Original assignee: Shanghai Electric Group Zhangjiagang Transformer Co ltd
Current assignee: Shanghai Electric Group Zhangjiagang Transformer Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-06-10
Anticipated expiration: 2031-09-13

Abstract

The utility model discloses a transformer low-voltage foil winding layer type coil end insulation structure which is characterized by comprising end insulation strips, wherein the end insulation strips are formed coil materials, a plurality of layers of the end insulation strips are respectively arranged at two end parts of a coil, and the number of layers of the section insulation strips is set according to the thickness of the coil. The insulating structure of the winding layer type coil end of the transformer low-voltage foil is beneficial to improving the performance indexes of the coil, such as temperature rise, mechanical force and the like; the low-voltage foil winding layer type coil end insulation structure of the transformer does not need to be connected in the coil winding process, does not need to add new process tool investment, is simple to manufacture, has high material utilization rate, can reduce waste generation and reduces cost; the transformer low-voltage foil winding layer type coil end insulation structure can adapt to coils with different thicknesses, and is better in application flexibility; the low-voltage foil winding layer type coil end insulation structure of the transformer is beneficial to improving the winding efficiency of the coil.

Description

Transformer low pressure foil winding layer formula coil end insulation system

Technical Field

The utility model relates to the related technical field of transformers, in particular to a low-voltage foil winding layer type coil end insulation structure of a transformer.

Background

The low-voltage large-current coil of the transformer is usually in a foil winding layer type structure and wound by adopting copper foil or aluminum foil so as to avoid the problems that a plurality of wires are wound and overlapped, the winding process is complex and the like. The structure of the low-voltage foil winding layer type coil end insulation in the prior art is shown in fig. 1 and fig. 2, and comprises a paperboard strip 1 and cable paper 2 which are adhered together, wherein the cable paper 2 and the paperboard strip 1 are adhered in a staggered mode, and at least one side of the cable paper 2 exceeds the side edge of the paper strip 1. This kind of end insulation system who pastes and make along with the coil winding in-process, cable paper 2 can additionally occupy the layer insulation thickness of coil, and then can occupy the vice space of coil, is unfavorable for the vice size control and the ampere-turn balance of cover coil. In addition, the cable paper 2 and the cardboard strip 1 are pasted in a straightened state, and the cable paper 2 can form folds between coil layers, so that the heat transfer effect is influenced by uneven thickness. The length of the formed end insulation structure is fixed, the end insulation structure needs to be frequently connected in the actual coil winding process, winding efficiency is affected, and the coil is not beneficial to bearing burst short-circuit mechanical force integrally.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a low-voltage foil winding layer type coil end insulation structure of a transformer, which uses a formed coil material, and can be wound simultaneously with a coil without occupying additional space in a secondary direction of the coil, causing no wrinkles, and having an unlimited length.

In order to achieve the purpose, the utility model provides a transformer low-voltage foil winding layer type coil end insulation structure which comprises end insulation strips, wherein the end insulation strips are formed coil materials, and a plurality of layers of the end insulation strips are respectively arranged at two end parts of a coil.

Preferably, the number of layers of the insulating strips is set according to the thickness of the coil.

Compared with the prior art, the low-voltage foil winding layer type coil end insulation structure of the transformer disclosed by the utility model has the advantages that: the insulating structure of the winding layer type coil end of the transformer low-voltage foil is beneficial to improving the performance indexes of the coil, such as temperature rise, mechanical force and the like; the low-voltage foil winding layer type coil end insulation structure of the transformer does not need to be connected in the coil winding process, does not need to add new process tool investment, is simple to manufacture, has high material utilization rate, can reduce waste generation and reduces cost; the transformer low-voltage foil winding layer type coil end insulation structure can adapt to coils with different thicknesses, and is better in application flexibility; the low-voltage foil winding layer type coil end insulation structure of the transformer is beneficial to improving the winding efficiency of the coil.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view showing a structure of low-voltage foil-wound coil end insulation in the prior art.

Fig. 2 is a side view of a structure of low-voltage foil-wound coil end insulation in the prior art.

Fig. 3 is a schematic diagram of an insulation structure of a low-voltage foil-wound coil end of a transformer according to the present invention.

Fig. 4 is a schematic diagram of a coil using the low-voltage foil-wound coil end insulation structure of the transformer according to the present invention.

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.

As shown in fig. 3, the low-voltage foil winding layer type coil end insulation structure of the transformer comprises an end insulation strip 3, wherein the end insulation strip 3 is a formed coil material, a plurality of layers of end insulation strips 3 are respectively arranged at two ends of a coil, and the end insulation strip 3 is wound when the coil is wound. The end insulating strips 3 do not generate wrinkles in the winding process, the thickness is uniform, the heat conducting performance is good, the length of the end insulating strips 3 is not limited, the connection operation is not needed during winding, the coil is good in mechanical force performance of bearing sudden short circuit, and the end insulating strips 3 are made of only one material.

As shown in fig. 4, the end of the coil 4 is provided with a plurality of layer-interval insulating strips 3, the thickness of each layer of insulating strip 3 is fixed, and the number of layers of insulating strips 3 can be adjusted according to the thickness of the coil 4, so that the coil 4 with different thicknesses can be suitable; the side surfaces of the coil 4 and the insulating strip 3 are provided with layer insulating structures 5.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a transformer low pressure foil winding layer formula coil end insulation structure which characterized in that, includes the end insulating strip, the end insulating strip is the shaping coil stock, a plurality of layers the end insulating strip sets up two tip at the coil respectively, the number of piles of end insulating strip sets up according to the thickness of coil.