CN204792370U

CN204792370U - Toroidal transformer

Info

Publication number: CN204792370U
Application number: CN201520499193.XU
Authority: CN
Inventors: 王大彦
Original assignee: Xfrmtronics Technologies Co Ltd
Current assignee: Xfrmtronics Technologies Co Ltd
Priority date: 2015-07-10
Filing date: 2015-07-10
Publication date: 2015-11-18
Anticipated expiration: 2025-07-10

Abstract

The utility model discloses a toroidal transformer, including the troidal core, twining in proper order from inside to outside on the surface of troidal core has primary winding, a coil side separator membrane, electrostatic shield copper foil layer, the 2nd coil side separator membrane, secondary and exterior insulation membrane, the electrostatic shield copper foil layer is including the PET polyester film who connects gradually from inside to outside, electrically conductive copper foil and PET electric tape. The utility model discloses a set the electrostatic shield copper foil layer to the PET polyester film who connects gradually from inside to outside, electrically conductive copper foil and PET electric tape, can prevent like this that the short circuit is looped in between winding copper foil to improve the life of transformer.

Description

A kind of toroidal transformer

Technical field

The utility model relates to electronics and field of electrical equipment, refers to a kind of toroidal transformer especially.

Background technology

The current structure of existing toroidal transformer electrostatic screen technology is: directly between primary and secondary winding, cover Copper Foil and connect ground wire, easily causes short circuit between upper and lower Copper Foil to form loop, can have a strong impact on transformer life like this.

Therefore, must make improvements for above-mentioned defect.

Utility model content

The utility model proposes a kind of toroidal transformer, solve short problem in transformer in prior art useful life.

The technical solution of the utility model is achieved in that

A kind of toroidal transformer, comprise annular core, the surface of described annular core is wound with armature winding, the first interlayer dielectric, electrostatic screen copper foil layer, the second interlayer dielectric, secondary winding and exterior insulation film from inside to outside successively, and described electrostatic screen copper foil layer comprises the PET polyester film, copper-foil conducting electricity and the PET insulating tape that connect successively from inside to outside.

Further, core insulation film is provided with between described annular core and described armature winding.

Further, described core insulation film is PET dielectric film.

Further, the bottom of described annular core and the top of described annular core are all provided with core insulation paper.

Further, described core insulation paper is the soft composite insulating foil of polyester film and polyester fibre non woven fabric.

Further, described first interlayer dielectric, described second interlayer dielectric and exterior insulation film are all PET dielectric film.

Enforcement the beneficial effects of the utility model have:

PET polyester film, copper-foil conducting electricity and the PET insulating tape of the utility model by being arranged to connect successively from inside to outside by electrostatic screen copper foil layer, can prevent short circuit between the Copper Foil of winding from forming loop like this, thus improve the useful life of transformer.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the sectional structure schematic diagram of a kind of toroidal transformer of the utility model embodiment;

Fig. 2 is the sectional structure schematic diagram of the electrostatic screen copper foil layer in a kind of toroidal transformer of the utility model;

Figure number and explanation thereof:

1, annular core; 2, core insulation paper; 3, core insulation film; 4, armature winding; 5, the first interlayer dielectric; 6, electrostatic screen copper foil layer; 61, PET polyester film; 62, copper-foil conducting electricity; 63, PET insulating tape; 7, the second interlayer dielectric; 8, secondary winding; 9, exterior insulation film.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

See figures.1.and.2, a kind of toroidal transformer that the utility model provides, comprise annular core 1, the surface of annular core 1 is wound with from inside to outside successively armature winding 4, first interlayer dielectric 5, electrostatic screen copper foil layer 6, second interlayer dielectric 7, secondary winding 8 and exterior insulation film 9, electrostatic screen copper foil layer 6 comprises the PET polyester film 61, copper-foil conducting electricity 62 and the PET insulating tape 63 that connect successively from inside to outside.The technical program passes through the insulating effect of PET polyester film 61 and PET insulating tape 63, can prevent copper-foil conducting electricity 62 short circuits be wound around from forming loops, thus improve the useful life of transformer.Electrostatic screen copper foil layer 6 winding process that the technical program plays electrostatic screen effect is: be fixed on annular core 1 by copper-foil conducting electricity 62 one end of electrostatic screen copper foil layer 6, then coiling is enclosed along armature winding 4 direction one, make electrostatic screen copper foil layer 6 overlapping, armature winding 4 is allowed to be covered by electrostatic screen copper foil layer 6, copper-foil conducting electricity 62 ending of electrostatic screen copper foil layer 6 is welded on ground wire, adopts fiberglass pipe to cover insulation to welding portion.

Core insulation film 3 is provided with between annular core 1 and armature winding 4.The burr damage enamelled wire on annular core 1 surface can be prevented by core insulation film 3, four corners of annular core 1 are all provided with the rounding of formed objects, can prevent annular core 1 corner from easily damaging enamelled wire like this, thus improve the useful life of transformer.

Core insulation film 3 is PET dielectric film, certainly can change the electrical insulation film of following other according to the requirement of reality, and be not limited to the PET dielectric film in preferred embodiment.

The bottom of annular core 1 and the top of annular core 1 are all provided with core insulation paper 2, and core insulation paper 2 is the soft composite insulating foil of polyester film and polyester fibre non woven fabric.Core insulation paper 2 is located between annular core 1 and core insulation film 3; core insulation paper 2 just covers four turnings of the upper surface of annular core 1, the lower surface of annular core 1 and annular core 1; can use minimum core insulation paper 2 that enamelled wire just can be made to be protected further like this

First interlayer dielectric 5, second interlayer dielectric 7 and exterior insulation film 8 are all PET dielectric film.Certainly can change the electrical insulation film of following other according to the requirement of reality, and be not limited to the PET dielectric film in preferred embodiment.

In sum, PET polyester film, copper-foil conducting electricity and the PET insulating tape of the utility model by electrostatic screen copper foil layer is arranged to connect successively from inside to outside, can prevent short circuit between the Copper Foil of winding from forming loop like this, thus improve the useful life of transformer.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.

Claims

1. a toroidal transformer, it is characterized in that, comprise annular core, the surface of described annular core is wound with armature winding, the first interlayer dielectric, electrostatic screen copper foil layer, the second interlayer dielectric, secondary winding and exterior insulation film from inside to outside successively, and described electrostatic screen copper foil layer comprises the PET polyester film, copper-foil conducting electricity and the PET insulating tape that connect successively from inside to outside.

2. toroidal transformer according to claim 1, is characterized in that, is provided with core insulation film between described annular core and described armature winding.

3. toroidal transformer according to claim 2, is characterized in that, described core insulation film is PET dielectric film.

4. toroidal transformer according to claim 2, is characterized in that, the bottom of described annular core and the top of described annular core are all provided with core insulation paper.

5. toroidal transformer according to claim 4, is characterized in that, described core insulation paper is the soft composite insulating foil of polyester film and polyester fibre non woven fabric.

6. toroidal transformer according to claim 1, is characterized in that, described first interlayer dielectric, described second interlayer dielectric and exterior insulation film are all PET dielectric film.