CN201717099U

CN201717099U - Gradually-changing high-voltage coil turn number type transformer

Info

Publication number: CN201717099U
Application number: CN2010202614594U
Authority: CN
Inventors: 冯民权; 李虎林; 师尚疆; 解德荣; 许永金
Original assignee: Yunnan Tongbian Electric Apparatus Co Ltd
Current assignee: Yunnan Tongbian Electric Apparatus Co Ltd
Priority date: 2010-07-13
Filing date: 2010-07-13
Publication date: 2011-01-19
Anticipated expiration: 2020-07-13

Abstract

A gradually-changing high-voltage coil turn number type transformer relates to a gradually-changing high-voltage coil turn number type transformer which enables to enhance the performance of insulation between low-voltage coils and high-voltage coils and is to solve the problem of a conventional transformer which has too great a distance between high-voltage coils and low-voltages coils and has too large a volume. The utility model provides a gradually-changing high-voltage coil turn number type transformer, comprising an iron core column, an iron core upper yoke and an iron core lower yoke. On the iron core column are sleeved a low-voltage coil and a high-voltage coil, between which an insulation gap is arranged. Longitudinal insulation gasp are arranged between the high-voltage coil and the iron core upper yoke and between the high-voltage coil and the iron core lower yoke. The turn number of the high-voltage coil is increased from the internal to the external. The adoption of the transformer with the above structure enables to significantly increase the creepage distance between the high-voltage coil and the low-voltage coil and to decrease the volume of the transformer, thereby reducing the manufacture cost of the transformer.

Description

High-tension coil number of turn gradual change type transformer

Technical field

The utility model transformer coil of wire technical field relates to a kind of high-tension coil number of turn gradual change type transformer that strengthens insulation property between low-voltage coil and the high-tension coil.

Background technology

Transformer coil is sleeved on the silicon steel sheet of transformer or the iron core that amorphous alloy material is made, general for common distribution transformer or the amorphous alloy distribution transformer of transformer capacity less than 4000kVA, its coil adopts layered structure usually, i.e. first suit low-voltage coil on the iron core of transformer, suit high-tension coil again, high-tension coil is to leaving certain insulation distance between low-voltage coil and the iron core, in order in less space, to obtain enough big insulation distance, common way is at high-tension coil, separate to increase insulation property with insulating material between low-voltage coil and the iron core, high-tension current in the high-tension coil generally can not worn insulating material, discharge to low-voltage coil and iron core after only can walking around insulating material, can prevent that high-tension current from walking around the minimum range highway section of insulating material and being called minimum creep distance, this distance is the high-tension coil and the beeline between low-voltage coil and the iron core that the surface along insulating material records, and this distance is that high-tension coil at the internal layer edge arrives the distance between the low-voltage coil at outer edge usually.

The general every layer of number of turn of tradition laminar high-tension coil structure is basic identical, just draw because of the restriction of coil total number of turns or for the ease of lead, the local number of plies number of turn is less, its obvious characteristic is that the number of turn of high-tension coil internal layer is consistent with the outer field number of turn, high-tension coil is all the same with insulation height between the low-voltage coil, the transformer of this structure, because between the high-tension coil and low-voltage coil of the marginal position of internal layer, it is shorter that electric current is walked around the creepage distance of insulating material, guarantee insulation property between high-tension coil and the low-voltage coil, must increase the average distance between high-tension coil and the low-voltage coil, this has just caused the transformer own vol to increase, and production cost increases.

The utility model content

For solving in the prior art, transformer high-voltage coil is excessive to the average distance between the low-voltage coil, causes the problem that volume of transformer is big, production cost is too high, and the utility model provides a kind of high-tension coil number of turn gradual change type transformer, and its embodiment is as follows:

High-tension coil number of turn gradual change type transformer, comprise yoke and yoke down unshakable in one's determination on core limb and the iron core that is connected core limb, be with low-voltage coil on the core limb, the low-voltage coil periphery is with high-tension coil, between low-voltage coil and the high-tension coil clearance for insulation is arranged, high-tension coil and unshakable in one's determination going up have the upper yoke insulation between the yoke, and high-tension coil and iron core have the lower yoke insulation down between the yoke, high-tension coil and unshakable in one's determination going up under yoke and the iron core have vertical clearance for insulation between the yoke, and high-tension coil is increased to the outer number of turn gradually by internal layer.

Adopt the transformer of said structure, because the high-tension coil number of turn of internal layer is less, the distance of walking around insulating material between the high-tension coil at internal layer edge and the low-voltage coil at outer edge is increasing greatly, high-tension coil is increased greatly to the creepage distance between the low-voltage coil, thereby, aborning can be under the constant situation of the transformer coil number of turn, be no more than under the situation of minimum creep distance, shorten the average insulation distance of high-tension coil to low-voltage coil, the volume of transformer is dwindled, so just reduced the production cost of transformer.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Fig. 1 is a cross-sectional view of the present utility model.

Embodiment

Embodiment one: as shown in Figure 1, a kind of high-tension coil number of turn gradual change type transformer, comprise yoke 4 and yoke 8 down unshakable in one's determination on core limb 1 and the iron core that is connected core limb 1, be with low-voltage coil 2 on the core limb 1, low-voltage coil 2 peripheries are with high-tension coil 6, between low-voltage coil 2 and the high-tension coil 6 clearance for insulation 3 is arranged, high-tension coil 6 and unshakable in one's determination going up have upper yoke insulation 5 between the yoke 4, high-tension coil 6 and iron core have lower yoke insulation 7 down between the yoke 8, high-tension coil 6 and unshakable in one's determination going up under yoke 4 and the iron core have vertical clearance for insulation 9 between the yoke 8, and described high-tension coil 6 is increased to the outer number of turn gradually by internal layer.

Claims

1. high-tension coil number of turn gradual change type transformer, comprise yoke (4) and yoke (8) down unshakable in one's determination on core limb (1) and the iron core that is connected core limb (1), be with low-voltage coil (2) on the core limb (1), low-voltage coil (2) periphery is with high-tension coil (6), between low-voltage coil (2) and the high-tension coil (6) clearance for insulation (3) is arranged, high-tension coil (6) and unshakable in one's determination going up have upper yoke insulation (5) between the yoke (4), high-tension coil (6) and iron core have lower yoke insulation (7) down between the yoke (8), high-tension coil (6) and unshakable in one's determination going up under yoke (4) and the iron core have vertical clearance for insulation (9) between the yoke (8), and it is characterized in that: described high-tension coil (6) is increased to the outer number of turn gradually by internal layer.