Transformer with small resistance loss

Abstract

The utility model discloses a transformer with small resistance loss, which relates to the technical field of transformers and comprises a transformer radiating box body, a transformer oil circulating mechanism is sleeved in the transformer radiating box body, a winding mechanism is connected in the transformer oil circulating mechanism, and the winding mechanism is connected with the transformer radiating box body. The utility model solves the problems that the existing transformer adopts a copper sheet for winding, so that the resistance loss is larger, the winding is heated, a heat dissipation mechanism is lacked, the loss of the transformer is too heavy, and the practicability is low. According to the transformer, the current density can be improved, so that the winding loss of the transformer can be reduced, meanwhile, the winding can be prevented from being overheated, circulation of transformer oil is achieved through the arrangement of the external transformer oil circulation mechanism and the transformer heat dissipation box body, overall heat dissipation of the transformer is achieved by matching with heat dissipation of the transformer oil circulation mechanism through the sleeving type cooling fins, and the practicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, concretely is a kind of transformer of small resistance loss. BACKGROUND

[0002] Transformer is often applied in isolated power electronic converter, the loss generated in the working process of transformer can cause the temperature rise of transformer, and the excessive temperature of transformer itself can cause the failure of part device, such as insulation damage or magnetic core saturation failure, thereby causing the functional failure of power electronic converter, and the loss of transformer is divided into two parts of copper loss and magnetic loss, wherein the copper loss is the energy consumed by current flowing through the coil winding resistance, which is manifested as coil winding heating, and the heating of coil winding is proportional to the square of current;The magnetic loss is the energy consumed by excitation and eddy current in the core, which is manifested as magnetic core heating.

[0003] The utility model discloses a kind of transformer structures with publication number CN211181916U, including winding base, magnetic core, primary winding and secondary winding, secondary winding is formed by the cross-stacking of multiple pieces of profiled copper sheet, insulation pad is arranged between profiled copper sheet, so that profiled copper sheet is electrically isolated, this transformer structure can use automatic winding method to manufacture primary winding, and also can use automatic equipment to stack profiled copper sheet and insulating rubber pad to manufacture secondary winding, finally, only simple assembly is needed, production efficiency is high, and production cost is low, but this transformer uses copper sheet for winding, resulting in large resistance loss, generating winding heating, and lacking heat dissipation mechanism, resulting in excessive transformer loss, low practicability.

[0004] For the above problems, a transformer with small resistance loss is proposed. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of transformer with small resistance loss, solve the problem that existing transformer in background art uses copper sheet for winding, resulting in large resistance loss, generating winding heating, and lacking heat dissipation mechanism, resulting in excessive transformer loss, low practicability.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of transformer with small resistance loss, including transformer heat sink box body, the inside sleeve joint of transformer heat sink box body is provided with transformer oil circulation mechanism, the inside connection of transformer oil circulation mechanism is provided with winding mechanism, the winding mechanism includes two groups of magnetic core, two groups of multiple strands of film-wrapped coil winding around two groups of magnetic core are provided, the multiple strands of film-wrapped coil winding uses multiple strands of film-wrapped wire to replace copper sheet winding, the transformer oil circulation mechanism includes two groups of sealing plates arranged on the upper and lower ends of magnetic core, the box plate is sealingly arranged between two groups of sealing plates, the upper end of the sealing plate is provided with cooling oil assembly, and the transformer heat sink box body includes sleeve joint type fin outside transformer oil circulation mechanism.

[0007] Preferably, the transformer heat dissipation box further comprises a bottom plate connected to the lower end of the sleeve type heat sink and a top plate arranged at the upper end of the sleeve type heat sink.

[0008] Preferably, side heat sinks are arranged on both sides of the box plate, and an oil outlet valve is arranged at the lower end of one side of the box plate.

[0009] Preferably, the cooling oil assembly comprises a transformer oil tank fixedly arranged at the upper end of the sealing plate, and an oil delivery pipe is arranged on one side of the transformer oil tank.

[0010] Preferably, the cooling oil assembly further comprises oil pumps arranged on both sides of the transformer oil tank, and a circulating oil pipe is connected between the transformer oil circulating mechanism and the oil pumps.

[0011] Preferably, the iron core is arranged between the two groups of sealing plates, and the two groups of multi-strand film-wound coil windings are arranged side by side.

[0012] Preferably, one side of the multi-strand film-wound coil winding is arranged as a high-voltage outgoing line end.

[0013] Preferably, one side of the multi-strand film-wound coil winding is arranged as a low-voltage outgoing line end.

[0014] Compared with the prior art, the transformer provided by the present application has the following advantages:

[0015] 1. The transformer with small resistance loss provided by the present application adopts multi-strand film-wound wire instead of copper sheet winding, which can improve the current density and reduce the winding loss of the transformer, and can also prevent the winding from overheating, thereby solving the problems of large resistance loss, heating of the winding, lack of heat dissipation mechanism, excessive loss of the transformer and low practicability of the existing transformer using copper sheet winding.

[0016] 2. The transformer with small resistance loss provided by the present application is provided with an external transformer oil circulating mechanism and a transformer heat dissipation box, the box plate and the sealing plate form a closed space, the cooling oil assembly circulates the transformer oil in the closed space, the sleeve type heat sink is arranged for heat dissipation of the transformer oil circulating mechanism, the overall heat dissipation of the transformer is realized, and the practicability is improved, thereby solving the problems of large resistance loss, heating of the winding, lack of heat dissipation mechanism, excessive loss of the transformer and low practicability of the existing transformer using copper sheet winding from the external structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the overall side structure of the present application;

[0019] Figure 3 It is the split structure schematic view of the transformer heat dissipation box body and the transformer oil circulation mechanism of the utility model;

[0020] Figure 4 It is the split structure schematic view of the transformer oil circulation mechanism of the utility model;

[0021] Figure 5 It is the split structure schematic view of the transformer oil circulation mechanism and the winding mechanism of the utility model.

[0022] In the drawing: 1, transformer heat dissipation box body;11, bottom plate;12, sleeve type fin;13, top plate;2, transformer oil circulation mechanism;21, box plate;211, side fin;212, oil outlet valve;22, sealing plate;23, cooling oil assembly;231, transformer oil tank;232, oil delivery pipe;233, oil pump;234, circulating oil pipe;3, winding mechanism;31, core;32, multi-strand film-wrapped coil winding;321, high-voltage outgoing line end;322, low-voltage outgoing line end. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] In order to further understand the content of the utility model, the utility model will be described in detail in conjunction with the drawings.

[0025] In conjunction with Figure 1 The utility model discloses a transformer with small resistance loss, which comprises a transformer heat dissipation box body 1, a transformer oil circulation mechanism 2 is arranged in the transformer heat dissipation box body 1, a winding mechanism 3 is connected to the inside of the transformer oil circulation mechanism 2, the winding mechanism 3 comprises two groups of cores 31, two groups of multi-strand film-wrapped coil windings 32 are arranged around the two groups of cores 31, the multi-strand film-wrapped coil winding 32 adopts multi-strand film-wrapped wire instead of copper sheet winding, the transformer oil circulation mechanism 2 comprises two groups of sealing plates 22 arranged on the upper and lower ends of the core 31, a box plate 21 is sealingly arranged between the two groups of sealing plates 22, a cooling oil assembly 23 is arranged at the upper end of the sealing plate 22, and the transformer heat dissipation box body 1 comprises sleeve type fins 12 sleeved on the outer side of the transformer oil circulation mechanism 2.

[0026] Specifically, the iron core 31 is the most important component in the transformer, which is made of silicon copper sheet or other magnetic material, and its main function is to establish a magnetic field in the transformer to transfer energy between the windings, and each group of multi-strand film-wrapped coil winding 32 is divided into two groups, the primary winding and the secondary winding, the primary winding is responsible for receiving the input voltage, and the secondary winding is responsible for outputting the voltage, the multi-strand film-wrapped coil in the transformer has small resistance loss, which can improve the current density and reduce the winding loss of the transformer, and also prevent the winding from overheating, the box plate 21 and the sealing plate 22 form a closed space, and the cooling oil assembly 23 realizes the circulation of the transformer oil in the closed space, and the matching sleeve type cooling fin 12 is arranged for the cooling of the transformer oil circulation mechanism 2, so that the overall cooling of the transformer is realized, and the practicability is improved.

[0027] The utility model will be further described in connection with the embodiments below.

[0028] Embodiment one:

[0029] In combination Figures 2-4 The transformer cooling box body 1 further comprises a bottom plate 11 connected to the lower end of the sleeve type cooling fin 12, and a top plate 13 arranged at the upper end of the sleeve type cooling fin 12, the bottom plate 11 and the top plate 13 are respectively connected to the lower end and the upper end of the sleeve type cooling fin 12 to maintain the overall stability of the transformer cooling box body 1, and facilitate the flat fixation of the transformer.

[0030] The box plate 21 is provided with side cooling fins 211 on both sides, and an oil outlet valve 212 is arranged at the lower end of one side of the box plate 21, the side cooling fins 211 are matched with the sleeve type cooling fin 12 to realize the cooling of each side of the transformer, and the oil outlet valve 212 can discharge oil outward to maintain the stability of the oil pressure in the transformer oil circulation mechanism 2.

[0031] The cooling oil assembly 23 comprises a transformer oil tank 231 fixedly arranged at the upper end of the sealing plate 22, and the transformer oil tank 231 is provided with an oil delivery pipe 232 on one side, the transformer oil tank 231 is arranged at the upper end to realize the gravity automatic casting of the transformer oil, and the oil delivery pipe 232 is arranged to facilitate the addition of transformer oil to the transformer oil tank 231 to maintain the stability of the oil pressure.

[0032] The cooling oil assembly 23 further comprises oil pumps 233 arranged on both sides of the transformer oil tank 231, and a circulating oil pipe 234 connected between the transformer oil circulation mechanism 2 and the oil pumps 233, the oil pumps 233 are used to circulate the transformer oil to maintain the stability of the oil pressure in the oil tank, the circulating oil pipe 234 realizes the circulating delivery of the transformer oil, and the two groups of oil pumps 233 improve the circulating efficiency of the transformer oil and have high heat dissipation.

[0033] Embodiment two:

[0034] In combination Figure 5The iron core 31 is arranged between the two sets of sealing plates 22, and the two sets of multi-strand film-wound coil windings 32 are arranged side by side, and the iron core 31 establishes a magnetic field in the transformer, and one set of multi-strand film-wound coil windings 32 is arranged in cooperation with one set of iron cores 31 and is wound by the same main magnetic flux.

[0035] One side of the multi-strand film-wound coil winding 32 is arranged as a high-voltage outgoing line end 321, and one side of the multi-strand film-wound coil winding 32 is arranged as a low-voltage outgoing line end 322, the high-voltage outgoing line end 321 is connected with a high-voltage bushing, and the low-voltage outgoing line end 322 is connected with a low-voltage bushing.

[0036] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0037] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A transformer with low resistance loss, comprising a transformer heat-dissipation box (1), characterized in that: The inside of the transformer heat dissipation box body (1) is sleeved with a transformer oil circulation mechanism (2), and the inside of the transformer oil circulation mechanism (2) is connected with a winding mechanism (3); The winding mechanism (3) comprises two groups of iron cores (31), two groups of multi-strand film-wrapped coil windings (32) arranged around the two groups of iron cores (31), wherein the multi-strand film-wrapped coil windings (32) are made of multi-strand film-wrapped wires instead of copper sheet windings, the transformer oil circulation mechanism (2) comprises two groups of sealing plates (22) arranged on the upper and lower ends of the iron cores (31), and the two groups of sealing plates (22) are sealingly provided with a box plate (21) therebetween, the upper end of the sealing plate (22) is provided with a cooling oil assembly (23), and the transformer heat dissipation box body (1) comprises a sleeved heat dissipation fin (12) sleeved outside the transformer oil circulation mechanism (2).

2. A transformer with low resistive losses according to claim 1, characterized in that: The transformer heat dissipation box body (1) further comprises a bottom plate (11) connected to the lower end of the sleeved heat dissipation fin (12) and a top plate (13) arranged at the upper end of the sleeved heat dissipation fin (12).

3. A transformer with low resistive losses according to claim 1, characterized in that: The two sides of the box plate (21) are provided with side heat dissipation fins (211), and the lower end of one side of the box plate (21) is provided with an oil outlet valve (212).

4. A transformer with low resistive losses according to claim 1, characterized in that: The cooling oil assembly (23) comprises a transformer oil tank (231) fixedly arranged at the upper end of the sealing plate (22), and one side of the transformer oil tank (231) is provided with an oil delivery pipe (232).

5. A transformer with low resistive losses according to claim 4, characterized in that: The cooling oil assembly (23) further comprises an oil pump (233) arranged on both sides of the transformer oil tank (231) and a circulating oil pipe (234) connected between the transformer oil circulation mechanism (2) and the oil pump (233).

6. A transformer with low resistive losses according to claim 1, characterized in that: The iron core (31) is arranged between the two groups of sealing plates (22), and the two groups of multi-strand film-wrapped coil windings (32) are arranged side by side.

7. A transformer with low resistive losses according to claim 1, characterized in that: One side of the multi-strand film-wrapped coil winding (32) is provided as a high-voltage outgoing line end (321).

8. A transformer with low resistive losses according to claim 1, characterized in that: One side of the multi-strand film-wrapped coil winding (32) is provided as a low-voltage outgoing line end (322).

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