CN211957393U - Hollow reactor with cake-type winding - Google Patents

Abstract

The utility model discloses an air-core reactor of cake formula winding, including locating busbar and at least one winding between the busbar down, the winding is cake formula winding, cake formula winding includes forward line cake and the reverse line cake of establishing ties in proper order at the axial, leaves the gap and forms epoxy's infiltration passageway between line cake and the line cake, and each line cake is formed by corresponding the wire coiling, in the forward line cake, the wire radially winds to the outside from innermost side direction outward, in the reverse line cake, the wire radially winds to the innermost side from outermost side direction inward. The utility model discloses it is easy and simple to handle, the line cake of winding out all dwindles to some extent in the axial with radially, adopts cake formula winding to reduce the insulating risk of layer voltage and winding to the busbar, has solved the problem big and insulating reliability difference to the air-core reactor area of the big inductance of undercurrent.

Description

Hollow reactor with cake-type winding

Technical Field

The utility model relates to a power equipment specifically is an air reactor of cake formula winding that uses as inductive high-voltage apparatus.

Background

The air reactor is a common power device of a power system and is widely applied to various occasions such as reactive compensation, filtering, current limiting and the like.

The winding is usually wound in two ways:

1. the multi-layer cylindrical wire is formed by winding one or more aluminum (copper) round wires in a laminated mode along the axial direction according to a spiral line.

2. One or more aluminum (copper) round wires are wound around the odd layers along the axial direction of the winding without intermittence.

The two winding methods are both wound along the axial direction, and adjacent conductor layers are separated by insulating materials, so that for the air reactor with low current and large inductance, if the first winding method is adopted, although the insulation is reliable, the volume is larger, and the occupied area is increased; if the second winding method is adopted, although the volume is small and the occupied area is small, the insulation reliability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an air reactor of cake formula winding to solve the big and poor problem of insulation reliability of the big inductance air reactor area of undercurrent.

The technical scheme of the air reactor with the pie-shaped winding comprises at least one winding arranged between an upper bus bar and a lower bus bar, and is characterized in that the winding is a pie-shaped winding, the pie-shaped winding comprises a forward coil cake and a reverse coil cake which are sequentially connected in series in the axial direction, a gap is reserved between the coil cakes and the coil cakes to form an epoxy resin permeation channel, each coil cake is formed by winding a corresponding wire, the wire is wound from the innermost side to the outermost side in the forward coil cake along the radial direction, and the wire is wound from the outermost side to the innermost side in the reverse coil cake along the radial direction.

In order to improve the insulation reliability of the winding, the conducting wires in each wire cake are aluminum flat wires or copper flat wires with insulation layers.

In order to avoid the occurrence of joints, one or two parallel or a plurality of parallel aluminum flat wires or copper flat wires are used for sequentially winding a series-connected forward wire cake and a series-connected reverse wire cake, and the forward wire cake and the reverse wire cake are moved and replaced by S-bend transition.

Furthermore, insulating materials and epoxy resin are filled between the upper end of the cake-shaped winding and the upper bus bar and between the lower end of the cake-shaped winding and the lower bus bar.

Furthermore, more than two pie windings are coaxially arranged between the upper bus bar and the lower bus bar in a parallel connection mode, and a polyester glass fiber drawing bar is arranged between the pie windings and used as a support of the axial heat dissipation air passage.

The utility model has the advantages that:

1. the utility model discloses the air-core reactor of cake formula winding has reduced between the line cake layer and the turn-to-turn insulating risk, has strengthened between the line cake layer and turn-to-turn pressure resistance, has reduced the insulating risk of cake formula winding to the busbar, greatly increased the whole mechanical strength of reactor.

2. The utility model discloses dwindle the volume, reduced area, can satisfy the use place that has the requirement to installation space.

3. The utility model discloses satisfied the line cake and insulated between the line cake, it is insulating with the circle not need in addition coiling layer, further reduced the coiling degree of difficulty and saved the material.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a pancake winding in the embodiment of fig. 1.

Fig. 3 is a schematic diagram of the pancake winding of fig. 2 made of one wire.

Fig. 4 is a schematic view of the winding manner of each cake in fig. 3.

And (3) identifying the figure number: 1. an upper bus bar; 2. a lower bus bar; 3. a pancake winding; 4. a post insulator; 5. a base.

Detailed Description

The technical solution of the present invention will be further explained with reference to the embodiments shown in the drawings.

The utility model discloses air core reactor of pie winding, including setting up pie winding 3 (the annular form) between last busbar 1 and lower busbar 2, all pack between the surface of pie winding 3, the last ring end of pie winding 3 and last busbar 1 and between the lower ring end of pie winding 3 and lower busbar 2 has insulating material and has soaked epoxy, with pie winding 3 curing moulding in this way, each row's body (the radial equipartition setting of circumference) of busbar 2 is installed on the post insulator 4 that corresponds down, and each post insulator 4 is installed on the base 5 that corresponds, as shown in fig. 1, fig. 2.

According to the designed winding turns, the pancake winding 3 comprises a forward coil cake and a reverse coil cake which are sequentially connected in series in the axial direction, for example, a forward coil cake, a reverse coil cake, a forward coil cake (c), a reverse coil cake (c), … … which are coaxial from top to bottom are arranged, gaps are left between the forward coil cake and the reverse coil cake to form an epoxy resin permeation channel (when the outer surface of the pancake winding 3 is soaked with epoxy resin, the epoxy resin enters the gaps between the forward coil cake and the reverse coil cake), each coil cake is continuously wound by one (or two parallel or three parallel) aluminum flat wire or copper flat wire, in the forward coil cake, the aluminum flat wire or the copper flat wire is wound from the innermost side to the outermost side (for example, N turns) in the radial direction, in the reverse coil cake, the aluminum flat wire or the copper flat wire is wound from the outermost side to the innermost side (for example, N turns) in the radial direction, the aluminum flat wire or the copper flat wire between the forward wire cake and the reverse wire cake is transposed by S-bend transition, as shown in figure 3.

Specifically, in the forward wire cake (i), an aluminum flat wire or a copper flat wire is wound from the innermost side to the outermost side (as shown by corresponding arrows in fig. 4) along the radial direction, and the number of turns from inside to outside is 1 turn, 2 turns, and 3 turns of … … N; in the reverse wire cake II, the aluminum flat wire or the copper flat wire is wound from the outermost side to the innermost side (as shown by corresponding arrows in figure 4) along the radial direction, and the number of the aluminum flat wire or the copper flat wire is respectively 1 from outside to inside, namely … … N-2 turns, N-1 turns and N turns; in the positive wire cake c, the aluminum flat wire or the copper flat wire is wound from the innermost side to the outermost side (as shown by the corresponding arrow in fig. 4) along the radial direction, and the aluminum flat wire or the copper flat wire respectively has 1 turn, 2 turns, 3 turns … … N turns from the inside to the outside, and so on in … ….

In the structure, the leading-out end of the flat aluminum wire or the flat copper wire of the uppermost wire cake is welded on the upper bus bar 1, and the leading-out end of the flat aluminum wire or the flat copper wire of the lowermost wire cake is connected on the lower bus bar 2.

The number of turns of each wire cake can be any integer N (N is more than or equal to 1), and the number of turns of the wire cake at the uppermost end or the lowermost end can be fractional.

A plurality of cake windings 3 which are coaxially connected in parallel between the upper bus bar 1 and the lower bus bar 2 can be arranged according to the current of the air reactor, and polyester glass fiber drawing bars are used as supports of axial heat dissipation air passages among the cake windings 3.

Claims (5)

1. Air-core reactor of pie winding is including locating at least one winding between last busbar (1) and lower busbar (2), its characterized in that: the coil is a cake-shaped coil (3), the cake-shaped coil (3) comprises a forward coil cake and a reverse coil cake which are sequentially connected in series in the axial direction, a gap is reserved between the coil cakes to form an epoxy resin infiltration channel, each coil cake is formed by winding a corresponding wire, the wire in the forward coil cake is wound from the innermost side to the outermost side along the radial direction, and the wire in the reverse coil cake is wound from the outermost side to the innermost side along the radial direction.

2. The pancake winding air core reactor according to claim 1, characterized in that: the conducting wire in each wire cake is an aluminum flat wire or a copper flat wire with an insulating layer.

3. The pancake winding air core reactor according to claim 2, characterized in that: one, two or more parallel aluminum flat wires or copper flat wires are used for winding a forward wire cake and a reverse wire cake which are sequentially connected in series in the cake-shaped winding (3), and the forward wire cake and the reverse wire cake are moved and transposed by adopting S-bending transition.

4. The pancake winding air core reactor according to any one of claims 1 to 3, characterized in that: insulating materials and epoxy resin are filled between the upper end of the cake-shaped winding (3) and the upper bus bar (1) and between the lower end of the cake-shaped winding and the lower bus bar (2).

5. The pancake winding air core reactor according to any one of claims 1 to 3, characterized in that: more than two pie windings (3) are coaxially arranged between the upper busbar (1) and the lower busbar (2) in a parallel connection mode, and a polyester glass fiber drawing rod is arranged between the pie windings (3) and used as a support of an axial heat dissipation air passage.

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