CN203746623U

CN203746623U - Novel transformer of multi-layer type coil structure

Info

Publication number: CN203746623U
Application number: CN201420024446.3U
Authority: CN
Inventors: 李永革
Original assignee: Guangxi Liuzhou Special Transformer Co Ltd
Current assignee: Guangxi Liuzhou Special Transformer Co Ltd
Priority date: 2014-01-15
Filing date: 2014-01-15
Publication date: 2014-07-30
Anticipated expiration: 2024-01-15

Abstract

A novel transformer of a multi-layer type coil structure comprises an inner coil and an outer coil, wherein the inner coil and the outer coil are respectively of a non-full-turn structure; the non-full-turn layers are filled with paper boards; the non-full-turn layers of the inner coil are arranged on the first layer and the second layer counted from the outermost layer; the non-full-turn layers of the outer coil are arranged on the first layer and the second layer counted from the innermost layer; the two ends of the non-full-turn layers are filled with the paper boards. On the condition of not increasing the material cost and not lowering the product performance index, the insulating strength of the ends of the coils of the transformer is increased, the voltage withstand capacity of the coils is improved, the operating reliability of the transformer is improved, and the quality of the transformer is ensured; when it is ensured that the coils have the same voltage withstand capacity, the size of the coils can be reduced, the size and the weight of the transformer are reduced, losses are lowered, and manufacturing cost is lowered.

Description

A kind of transformer of novel multi-layer layer coil structure

Technical field

The utility model relates to a kind of converting equipment, relates in particular to a kind of transformer of novel multi-layer layer coil structure.

Background technology

For the transformer of multilayer laminar loop construction, its layer coil is generally discontented circle structure, and discontented circle adopts following manner to arrange:

The not multilayer layer coil with inner oil duct, discontented circle is generally placed on the 2nd layer (the 2nd layer reciprocal) counting from outermost layer; With the multilayer layer coil of inner oil duct, discontented circle is generally placed on the middle level of the outer section of oil duct, and discontented circle place is filled up with cardboard, and cardboard space former is placed on the centre of discontented circle place layer.

Due to coil width to electric field more even, and electric field pole between end winding is inhomogeneous, in transformer test, running, seldom occurs the breakdown discharge fault of paper web between coil, the fault conventionally occurring is the end creeping discharge between coil.

And end winding along face creepage withstand voltage with end insulation size and main channel size closely related, its computing formula is:

Uh=E × (Σ di) (V of unit);

In formula: Uh is end winding along face creepage withstand voltage (V of unit), and E is that end winding cardboard allows field intensity (V/mm of unit) along face, Σ di be end cardboard along face creepage distance summation, i.e. the mm of Σ di=h1+h2+A(unit);

In formula: h1, h2 are end insulation size (mm of unit), and A is main channel size (mm of unit);

As Uh > U, there will not be the end creeping discharge phenomenon between coil; In formula: U is test voltage (1 minute industrial frequency withstand voltage) (V of unit).

From above formula, the transformer of original structure form is wanted intensifier coil overhang insulation intensity, improve product operational reliability, can hold insulation size h1, h2 or main channel size A to realize by increase, but no matter adopt which kind of mode, capital increases volume of transformer increase, weight increase, cost, and product performance index declines to some extent.

Utility model content

The technical problems to be solved in the utility model is, in the situation that not increasing material cost, not reducing product performance index, provide a kind of transformer of simple in structure, reliable, novel multi-layer layer coil structure that cost is low, to overcome the existing above-mentioned deficiency of prior art.

The technical scheme that the utility model is taked is: a kind of transformer of novel multi-layer layer coil structure, comprise interior loop and exterior loop, interior loop and exterior loop are discontented circle structure, discontented circle layer cardboard space former, the discontented circle layer of described interior loop is placed on the 1st, 2 layers that count from outermost layer, and the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer.

Its further technical scheme is: described cardboard is filled in the two ends of discontented circle place layer.

Owing to adopting technique scheme, the transformer of a kind of novel multi-layer layer coil structure of the utility model has following beneficial effect:

1. the transformer of a kind of novel multi-layer layer coil structure of the utility model can be in the situation that not increasing material cost, not reducing product performance index, strengthen the transformer coil terminal insulation intensity, improve coil withstand voltage ability, improve product operational reliability, ensure product quality:

As Fig. 2, the end winding of original transformer along the creepage withstand voltage Uh=E of face × (Σ di);

As Fig. 1, the end winding of existing transformer along creepage withstand voltage the Uh '=E of face × (Σ di ');

Both main channels are measure-alike is A=A ', due to h1 ' > h1, and h2 ' > h2,

Therefore Σ di ' > Σ di, so Uh ' > Uh;

End winding dielectric strength, coil withstand voltage ability and the transformer operational reliability improved after structure are all improved, and product quality is guaranteed;

2. in the time ensureing that coil has identical withstand voltage ability, can reduce coil dimension, reduce volume of transformer and weight, reduce the wastage, reduce manufacturing cost;

The end winding of original transformer along the creepage withstand voltage Uh=E of face × (Σ di)=E × (h1+h2+A),

The end winding of existing transformer along creepage withstand voltage the Uh '=E of face × (Σ di ')=E × (h1 '+h2 '+A '),

Because of (h1 '+h2 ') > (h1+h2), h1 '=h1+b; H2 '=h2+b; B is cardboard space former length (mm of unit);

Make Uh '=Uh, as long as reduce the size of end insulation h1, h2 or A ', make (h1 '+h2 '+A ')=(h1+h2+A) can realize, in other words the transformer of a kind of novel multi-layer layer coil structure of the utility model, ensureing to have under the prerequisite of identical overhang insulation intensity, can reduce coil dimension, the reducing of coil dimension, to cause volume of transformer and weight to reduce, thereby reduce manufacturing cost in reducing the wastage.

The technical characterictic of the transformer of a kind of novel multi-layer layer coil structure below in conjunction with drawings and Examples to the utility model is further described.

Brief description of the drawings

A kind of novel multi-layer layer coil structure (inside and outside coil is not all with oil duct) of Fig. 1: embodiment mono-;

Fig. 2 :the transformer principle figure (inside and outside coil is not all with oil duct) of original multilayer laminar loop construction;

A kind of novel multi-layer layer coil structure (interior lines astragal oil duct, exterior loop are not with oil duct) of Fig. 3: embodiment bis-;

Fig. 4 :the transformer principle figure (interior lines astragal oil duct, exterior loop are not with oil duct) of original multilayer laminar loop construction;

A kind of novel multi-layer layer coil structure (outside line astragal oil duct, interior loop are not with oil duct) of Fig. 5: embodiment tri-;

Fig. 6 :the transformer principle figure (outside line astragal oil duct, interior loop are not with oil duct) of original multilayer laminar loop construction;

A kind of novel multi-layer layer coil structure (inside and outside coil is all with oil duct) of Fig. 7: embodiment tetra-;

Fig. 8 :the transformer principle figure (inside and outside coil is all with oil duct) of original multilayer laminar loop construction;

In figure:

1-interior loop, 11-interior loop wire, 2-paper web, 3-insulating end, 4-exterior loop, 41-exterior loop wire, 5-iron yoke cushion block, 6-cardboard, 7-oil duct.

Embodiment

Embodiment mono-

Referring to accompanying drawing 1, a kind of transformer of novel multi-layer layer coil structure, comprise 5 layers of interior loop and 8 layers of exterior loop, interior loop and exterior loop are discontented circle structure, interior loop and exterior loop are not all with oil duct, discontented circle layer cardboard space former, and the discontented circle layer of described interior loop is placed on the 1st, 2 layers of counting from outermost layer, i.e. the 4th, 5 layers accompanying drawing 1, the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer, i.e. the 1st, 2 layers in accompanying drawing 1.Described cardboard is filled in the two ends of discontented circle place layer.

Embodiment bis-

Referring to accompanying drawing 3, a kind of transformer of novel multi-layer layer coil structure, comprise 5 layers of interior loop and 8 layers of exterior loop, interior loop and exterior loop are discontented circle structure, interior lines astragal oil duct, and exterior loop is not with oil duct, discontented circle layer cardboard space former, the discontented circle layer of described interior loop is placed on the 1st, 2 layers of counting from outermost layer, i.e. the 4th, 5 layers accompanying drawing 3, and the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer, i.e. the 1st, 2 layers in accompanying drawing 3.Described cardboard is filled in the two ends of discontented circle place layer.

Embodiment tri-

Referring to accompanying drawing 5, a kind of transformer of novel multi-layer layer coil structure, comprise 5 layers of interior loop and 8 layers of exterior loop, interior loop and exterior loop are discontented circle structure, and interior loop is not with oil duct, outside line astragal oil duct, discontented circle layer cardboard space former, the discontented circle layer of described interior loop is placed on the 1st, 2 layers of counting from outermost layer, i.e. the 4th, 5 layers accompanying drawing 5, and the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer, i.e. the 1st, 2 layers in accompanying drawing 5.Described cardboard is filled in the two ends of discontented circle place layer.

Embodiment tetra-

Referring to accompanying drawing 7, a kind of transformer of novel multi-layer layer coil structure, comprise 5 layers of interior loop and 8 layers of exterior loop, interior loop and exterior loop are discontented circle structure, interior loop and exterior loop are all with oil duct, discontented circle layer cardboard space former, and the discontented circle layer of described interior loop is placed on the 1st, 2 layers of counting from outermost layer, i.e. the 4th, 5 layers accompanying drawing 7, the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer, i.e. the 1st, 2 layers in accompanying drawing 7.Described cardboard is filled in the two ends of discontented circle place layer.

Above embodiment is more typical embodiment just, and the number of plies of transformer interior loop and exterior loop may be different in actual applications, but the discontented setting of circle layer and the principle of cardboard space former are constant.

Claims

1. the transformer of a novel multi-layer layer coil structure, comprise interior loop and exterior loop, interior loop and exterior loop are discontented circle structure, discontented circle layer cardboard space former, it is characterized in that: the discontented circle layer of described interior loop is placed on the 1st, 2 layers that count from outermost layer, the discontented circle of exterior loop is placed on the 1st, 2 layers that count from innermost layer.

2. the transformer of a kind of novel multi-layer layer coil structure according to claim 1, is characterized in that: described cardboard is filled in the two ends of discontented circle place layer.