CN2131180Y

CN2131180Y - Transformer

Info

Publication number: CN2131180Y
Application number: CN 92216147
Authority: CN
Inventors: 宋铁章
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-08
Filing date: 1992-06-08
Publication date: 1993-04-28
Anticipated expiration: 2002-06-08

Abstract

The utility model discloses a transformer, which relates to the improvement of the structure of a transformer. The utility model is more suitable for a medium and small oil-filled transformer or a medium and small dry type transformer. The utility model is characterized in that the transformer is composed of a stem, a high voltage winding, a low voltage winding, an insulating hard supporting bar, and a yoke; the cross section of the high voltage winding is elliptical, and the outside of the cross section of the low voltage winding is elliptical; the inside of the cross section of the low voltage winding is an inscribed polygon, and an iron core which is corresponding to the inscribed polygon is also a polygon; an insulating hard supporting bar is arranged in the low voltage winding. The utility model has the advantages of material saving, low load or unload consumptions, simple fabrication process, etc.

Description

Transformer

The utility model relates to the improvement of transformer device structure, more is applicable to middle-size and small-size oil-filled transformer or dry-type transformer, and it comprises stem, high pressure winding, low pressure winding, iron yoke, insulate and hold out in spite of difficulties bar.

Present transformer stem cross section is to build up circle by multistage silicon steel sheet, stem is the core that the transformer electromagnetism transforms, and the iron yoke only is the coupling part that constitutes magnetic circuit, in order to reduce the loss of transformer, increase umber of turn often and increase the conductor cross-section way, but the result causes wire weight to increase, stem height and the corresponding increase of iron yoke length, and making it manufacturing cost also increases.

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, and a kind of electric conductor number of turn that reduces is provided, and shortens the transformer of iron yoke length, saving material.

The purpose of this utility model is to realize like this, the utility model is exactly to do on the basis of existing structure to improve, the cross section of high pressure winding is oval, the cross section of low pressure winding is outward oval, the interior inscribed polygon that is, corresponding iron core also is a polygonal, and the low pressure winding department is provided with insulation and holds out in spite of difficulties bar.

Major advantage of the present utility model:

1, save material:

Because high pressure winding cross section ovalize, because of the comparable existing stem of stem spacing is little, this just increases the cross section of stem, therefore just can reduce the outer conductor number of turn of stem under identical loss power prerequisite, so promptly save the material of iron yoke, also saved the material of stem outer conductor;

2, reduce the wastage:

Gap ratio between the stem of the present utility model is existing little, makes it no-load loss and no-load current and reduces the loss of promptly having saved energy.

3, manufacture craft is simple:

The equal ovalize in cross section of the outside of high-tension winding of the present utility model and low pressure coiling; The cross section is a polygon in the low pressure winding, and iron core is a polygon, and its technology manufacture method is simple, is easy to make the coiling mould, can reduce cost of manufacture.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A profile of Fig. 1.

Below in conjunction with accompanying drawing concrete structure of the present utility model is further described:

The utility model comprises stem 2, high pressure winding 3, low pressure winding 4, iron yoke 1, insulate and hold out in spite of difficulties bar 5; The cross section of high pressure winding 3 is oval, and the cross section of low pressure winding 4 is outward oval, the interior inscribed polygon that is, 4 of low pressure windings are provided with insulation and hold out in spite of difficulties bar 5.

The inscribed polygon of the cross section of low pressure winding 4 connects octagon in preferably; In connect octagonal major axis, minor axis ratio 1.2-2 preferably.

Low pressure winding 4 application paper tinsel (plate) conductors or strip conductor (its thickness≤2.5mm), but low pressure winding 4 is directly on octagon moving-wire mould, (see figure 2) when around the oil to low pressure winding 4 (gas) road, put eight eradication edge and hold out in spite of difficulties bar 5, make octagon winding ovalisation, insulation is held out in spite of difficulties bar 5 and will be bonded on the layer insulation, low pressure winding 4 after intact, the profile ovalize; Outside low pressure winding 4, carry out coiling high pressure winding 3 again.

For example adopt prior art S9-1000/10 product: high pressure 10KV, low pressure 0.4KV, the threephase oil immersed transformer of capacity 1000KVA, no-load loss 1700W, load loss 10300W, heart column section is circular, and high winding 3, low pressure winding 4 all adopt the paper bag copper strap wire, the heavy 582kg of copper cash, silicon steel sheet 1313kg, transformer oil 870kg, fuel tank and annex 890kg, the heavy 2180kg of device body, gross weight 3945kg, 31510 yuan of main material costs.Press the utility model technology implementation, under the identical situation of performance standard, low pressure winding 4 is an aluminium foil, high pressure winding 3 is a flat type copper wire, the heavy 285kg of copper cash, aluminium foil 106kg, silicon steel sheet 967kg, transformer oil 500kg, fuel tank and annex 675kg, the heavy 1575kg of device body, gross weight 2750kg, 21355 yuan of main material costs reduce by 10155 yuan than existing the said goods cost, promptly reduce by 32.2%.

For another example, adopt prior art S7-1000/10 product: no-load loss 1800W, load loss 11600W, the heavy 512kg of copper cash, silicon steel sheet 1258kg, transformer oil 629kg, fuel tank and annex 785kg, the heavy 2038kg of device body, gross weight 3515kg, 28560 yuan of main material costs.Press the utility model technology implementation, under the identical situation of performance standard, low pressure winding 4 is for having the double helix winding of vertical oil duct, high pressure winding 3 is the multi-layer cylinder formula, the heavy 391kg of copper cash, silicon steel sheet 910kg, transformer oil 481kg, fuel tank and annex 708kg, the heavy 1496kg of device body, gross weight 2685kg, 21457 yuan of main material costs, reduce by 7103 yuan than the said goods transformer cost, reduce by 24.8%.

Claims

1, a kind of transformer comprises stem 2, high pressure winding 3, low pressure winding 4, iron yoke 1, insulate and hold out in spite of difficulties bar 5, the cross section that it is characterized in that high pressure winding 3 is for oval, the cross section of low pressure winding 4 is outward oval, the interior inscribed polygon that is, 4 of low pressure windings are provided with insulation and hold out in spite of difficulties bar 5.

2, a kind of transformer according to claim 1, the inscribed polygon that it is characterized in that the cross section of low pressure winding 4 connects octagon in being.

3, a kind of transformer according to claim 2, the ratio that connects octagonal major axis, minor axis in it is characterized in that is 1.2-2.