CN206148240U - Dry transformer - Google Patents

Abstract

The utility model discloses a dry transformer, the connected mode between two sections adjacent coil windings in this transformer is the skin of another section coil winding of inlayer connection of one section coil winding. The utility model discloses simple structure, the adjacent more traditional connected mode of voltage between 2 of two section adjacent coils descends half, intersegmental loss of voltage for insulation distance reduces, can reduce the distance between coil segment and the section, practices thrift the insulating material who fills, volume and the weight that further can reduce the transformer. On the other hand owing to changed the mode of connection, has still saved the winding activity duration, has improved work efficiency. The reduction of welding point has also reduced the probability of rosin joint, has improved the reliability of equipment.

Description

Dry-type transformer

Technical field

The utility model is related to a kind of dry-type transformer, belongs to field transformer.

Background technology

The concept of dry-type transformer is relative with oil-filled transformer, and difference is that the dry-type transformer type of cooling is taken It is air-cooled, it is specifically divided into natural air cooling and forces air to cool down.The dielectric of dry-type transformer can adopt air insulation Or casting insulated material, the most frequently used insulating materials is epoxy resin.Transformer coli winding is segmentation, so can be increased Plus it is first between degree of coupling, to reduce transformer in secondary electric capacity, can all have improvement to electromagnetic compatibility and power supply ripple. In prior art, the connection between adjacent segment is internal layer connection internal layer, outer layer connection outer layer.By taking four-part form winding as an example, such as Fig. 1 It is shown, the b points of a points linkage section 2 of section 1, the E points of the D points linkage section 3 of section 2, the g points of the f points linkage section 4 of section 3.This mode Problem be, as a example by 10 kilovolts, about 2500 volts of the voltage between per section, and the voltage between adjacent two intersegmental A and B be A-a Plus the voltage sum between b-B, equally, the voltage between C and D, E and F is also to reach 5 kilovolts, is calculated by 200 volts/millimeter, Insulation distance wants 25 millimeters.The increasing of insulation distance will not only cause volume of transformer to become big, also waste the insulation material of addition Material.

The content of the invention

The utility model purpose is to provide the less dry-type transformer of insulation voltage between a kind of coil windings.

For achieving the above object, a kind of dry-type transformer of the utility model, including iron core and some sections of coil windings；It is special Levy and be, the connected mode between adjacent two sections of coil windings be the internal layer of wherein one section of coil windings connect another section of coil around The outer layer of group.

The utility model simple structure, simply changes the connection mode of coil windings, adjacent two sections of coils after improvement Voltage between adjacent 2 points is reduced compared with conventional coupling arrangement drop by half, intersegmental voltage so that insulation distance reduces, and can contract The distance between little coil segment and section, save the insulating materials of filling, can further reduce the volume and weight of transformer.Separately On the one hand, the traditional mode of connection require coil windings must first around section 4, section 2, then turn direction further around section 3, section 1 it is suitable Sequence distinguishes coiling, is finally completed by welding again；Due to changing the mode of connection, can according to section 4, section 3, section 2, section 1 it is suitable The direct coiling of sequence, had both saved the winding process time, improve operating efficiency；Simultaneously also section directly need not be welded again with section, The potential risk brought due to rosin joint is avoided, the reliability of equipment is improve.

Description of the drawings

Fig. 1 is the connected mode of prior art dry-type transformer coil winding；

Fig. 2 is the utility model coil windings schematic diagram.

Specific embodiment

Below in conjunction with the accompanying drawings the utility model is described in further detail.

A kind of dry-type transformer, including iron core and some sections of coil windings；Connection side between adjacent two sections of coil windings Formula is the outer layer that the internal layer of wherein one section of coil windings connects another section of coil windings.As shown in Fig. 2 a points linkage section 2 of section 1 B points, the E points of the d points linkage section 3 of section 2, the G points of the f points linkage section 4 of section 3.

The utility model simple structure, simply changes the connection mode of coil windings, adjacent two sections of coils after improvement Voltage between adjacent 2 points is reduced compared with conventional coupling arrangement drop by half, intersegmental voltage so that insulation distance reduces, and can contract The distance between little coil segment and section, save the insulating materials of filling, can further reduce the volume and weight of transformer.Separately On the one hand, the traditional mode of connection require coil windings must first around section 4, section 2, then turn direction further around section 3, section 1 it is suitable Sequence distinguishes coiling, is finally completed by welding again；Due to changing the mode of connection, can according to section 4, section 3, section 2, section 1 it is suitable The direct coiling of sequence, had both saved the winding process time, improve operating efficiency；Simultaneously also section directly need not be welded again with section, The potential risk brought due to rosin joint is avoided, the reliability of equipment is improve.

Claims (1)

1. a kind of dry-type transformer, including iron core and some sections of coil windings；Characterized in that, between adjacent two sections of coil windings Connected mode be that the internal layer of wherein one section of coil windings connects the outer layer of another section of coil windings.