CN205487658U - Dry type transformer core - Google Patents

Abstract

The utility model discloses a dry type transformer core, including a plurality of iron core pieces and around coil on iron core and iron core piece, the iron core piece is established at the both ends of iron core, and iron core piece cross -section is cascadedly, and the size of the iron core piece of drawing close to the iron core from both ends increases gradually, and the wherein one end of iron core is the high -pressure side, and the other end is the low tension side, and the number of turns of the iron core piece of high -pressure side is greater than the iron core piece number of turns of low pressure survey, the iron core piece at iron core both ends respectively with the upper yoke, down indisputable yoke is connected, upper and lower indisputable yoke and iron core surface are equipped with epoxy, adopt cascaded cross -section through the iron core, simple structure, improve the magnetic circuit and distribute, reduce no -load loss, noise reduction, saving running cost, pour into a mould epoxy at upper and lower indisputable yoke and iron core moreover to making whole coil become one, having increased high -pressure coil's dielectric strength, anti short circuit ability is strengthened greatly, improves product life.

Description

A kind of dry-type transformer iron core

Technical field

This utility model relates to Transformer Manufacturing Technology, particularly to a kind of dry-type transformer iron core.

Background technology

Existing transformer iron-core structure cross section is the most rounded or ellipsoidal structure, by some laminations Repeating to be formed by stacking, the core interior magnetic circuit distribution of this kind of structure is the best, so that open circuit loss, sky Carry electric current and noise is greatly increased.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of simple in construction, improves magnetic circuit and divide Cloth, reduction open circuit loss, reduction noise, the dry-type transformer iron core of saving operating cost.

For achieving the above object, the technical scheme that this utility model offer is following: a kind of dry-type transformer Iron core, described iron core is provided with three, and three iron cores are mounted in iron core assembly case, described iron core bag Including some laminations and be wound on coil on iron core and lamination, described lamination is located at the two of iron core End, lamination cross section is staged, and the size of the lamination drawn close to iron core from both ends gradually increases Adding, wherein one end of iron core is high-pressure side, and the other end is low-pressure side, and the circle of on high-tension side lamination Number more than low pressure survey the lamination numbers of turn, the lamination at described iron core two ends respectively with upper yoke, lower ferrum Yoke connects, and the two ends of upper yoke are connected with upper clamping piece respectively, and the two ends of lower yoke are welded with lower clamping piece respectively Connecing, described upper and lower iron yoke and iron core surface are provided with epoxy resin.

Preferably, upper yoke, lower yoke cross section the most stepped, and upper yoke, lower yoke also divide Surveying for high-pressure side, low pressure, the on high-tension side steel disc quantity of upper and lower iron yoke is more than the steel disc number of low-pressure side Amount.

Use technique scheme, this utility model by iron core use stepped cross section, simple in construction, Improve magnetic circuit distribution, reduce open circuit loss, reduction noise, saving operating cost, and upper and lower Iron yoke and iron core casting epoxy resin, so that whole coil is integrally forming, add high-tension coil Dielectric strength, anti-short circuit capability is greatly reinforced, and improves product service life.

Accompanying drawing explanation

Fig. 1 is this utility model structural representation；

Fig. 2 is the A-A sectional view of Fig. 1；

Fig. 3 is the B-B sectional view of Fig. 1；

Fig. 4 is the C-C sectional view of Fig. 1；

Wherein, 1. iron core 2. lamination 3. upper yoke 4. lower yoke 5. upper clamping piece presss from both sides for 6. times Part.

Detailed description of the invention

Below in conjunction with the accompanying drawings, by the description to embodiment, this utility model is described further:

As shown in figures 1-4, this utility model one dry-type transformer iron core, iron core 1 is provided with three, Three iron cores 1 are mounted in iron core assembly case, and iron core 1 includes some laminations 2 and is wound on ferrum Coil on core 1 and lamination, lamination 2 is located at the two ends of iron core 1, and lamination 2 cross section is ladder Formula, and the size of the lamination 2 drawn close to iron core 1 from both ends is gradually increased, iron core 1 is wherein One end is high-pressure side, and the other end is low-pressure side, and the number of turn of on high-tension side lamination 2 is surveyed more than low pressure Lamination 2 number of turn, the lamination 2 at iron core 1 two ends is connected with upper yoke 3, lower yoke 4 respectively, The two ends of upper yoke 3 are connected with upper clamping piece 5 respectively, and the two ends of lower yoke 4 are welded with lower clamping piece 6 respectively Connect, upper and lower iron yoke 3,4 and the upper epoxy resin of iron core 1 surface brush.

This utility model adapts to iron core 1 to allow upper and lower iron yoke 3,4, it is to avoid occur that structure is multiple Hydridization, can make upper yoke 3, lower yoke 4 cross section the most stepped, and upper yoke 3, lower ferrum Yoke 4 is also classified into high-pressure side, low pressure is surveyed, and the on high-tension side steel disc quantity of upper and lower iron yoke 3,4 is more than The steel disc quantity of low-pressure side.

This utility model iron core 1 uses stepped cross section, simple in construction, improves magnetic circuit distribution, fall Low no-load loss, reduction noise, saving operating cost, and pour into a mould in upper and lower iron yoke and iron core Epoxy resin, so that whole coil is integrally forming, adds the dielectric strength of high-tension coil, anti-short Road ability is greatly reinforced, and improves product service life.

Above-described is only preferred implementation of the present utility model, it is noted that for this area Those of ordinary skill for, without departing from this utility model create design on the premise of, it is also possible to do Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.

Claims (2)

1. a dry-type transformer iron core, described iron core (1) is provided with three, and three iron cores (1) are all pacified Being loaded in iron core assembly case, described iron core (1) includes some laminations (2) and is wound on iron core (1) Coil upper with lamination (2), it is characterised in that: described lamination (2) is located at the two ends of iron core (1), Lamination (2) cross section is staged, and the chi of the lamination (2) drawn close to iron core (1) from both ends Very little being gradually increased, wherein one end of iron core (1) is high-pressure side, and the other end is low-pressure side, and on high-tension side Lamination (2) number of turn that the number of turn of lamination (2) is surveyed more than low pressure, the ferrum at described iron core (1) two ends Chip (2) is connected with upper yoke (3), lower yoke (4) respectively, the two ends of upper yoke (3) respectively with Upper clamping piece (5) connects, and the two ends of lower yoke (4) are welded with lower clamping piece (6) respectively, described upper and lower Iron yoke (3,4) and iron core (1) surface are provided with epoxy resin.

Dry-type transformer iron core the most according to claim 1, it is characterised in that: described upper yoke (3), The cross section of lower yoke (4) is the most stepped, and upper yoke (3), lower yoke (4) be also classified into high-pressure side, Low pressure is surveyed, and the on high-tension side steel disc quantity of upper and lower iron yoke (3,4) is more than the steel disc quantity of low-pressure side.