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Epoxy resin pouring dry type transformer for electric locomotive

An electric locomotive and epoxy resin technology, applied in the field of transformers, can solve the problems of increasing the size and weight of transformers, poor waterproof performance, and unreachable waterproof effects, etc., and achieve reasonable structural design, excellent waterproof performance, and scientific and reasonable pouring technology Effect

Active Publication Date: 2013-06-26
PEARL ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the double-core transformer uses a double-core structure, the size and weight of the transformer are increased, and the waterproof performance is relatively poor, that is, the above requirements two and three cannot be met.
With the higher running speed of locomotives and various harsh operating environments, it is difficult for existing transformers to meet the special technical requirements of locomotive transformers.
[0005] In addition, Chinese patent application CN101599352A discloses a dry-type transformer or reactor winding waterproof treatment method, which achieves a certain waterproof effect through secondary immersion paint, but its waterproof effect is still not as good as the existing dry-type transformer for electric locomotives. requirements

Method used

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  • Epoxy resin pouring dry type transformer for electric locomotive
  • Epoxy resin pouring dry type transformer for electric locomotive
  • Epoxy resin pouring dry type transformer for electric locomotive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 Transformer for electric locomotive of the present invention

[0047] Such as figure 1 As shown, a transformer for an electric locomotive includes an iron core 1. The iron core 1 includes three iron core columns 11 arranged in parallel in the transverse direction, and the three iron core columns 11 are connected together by an upper yoke and a lower yoke to form an inverted The "day" font structure. Each core column 11 is provided with a secondary coil 2 and a primary coil 3 sequentially from the inside to the outside, and the core column 11 is inside, the secondary coil 2 is arranged in the middle to surround the core column 11, and the primary coil 3 is arranged on the The outside is to surround the core column 11 and the secondary coil 2 . A cooling air duct 4 is formed between each secondary coil 2 and the primary coil surrounding the secondary coil 2 . In addition, the iron core 1 is fixed on the bracket through the upper clip 51 and the lower cli...

Embodiment 2

[0067] Embodiment 2 Transformer for electric locomotive of the present invention

[0068] The transformer structure and coil curing process for electric locomotives of the present invention are the same as those in Example 1, the only difference being that in the pouring method, step 1) the medium and low viscosity resin formula is:

[0069] Phenolic resin 45wt%;

[0070] Methyltetrahydrophthalic anhydride 43wt%;

[0071] Polypropylene glycol 4wt%;

[0072] N, N-benzyldimethylamine 4wt%;

[0073] Inorganic pigments 4wt%.

[0074] The formula of unsaturated polyester insulating dipping varnish in step 2) is:

[0075] Polyethylene terephthalate: 94%;

[0076] Solvent: 6%.

Embodiment 3

[0077] Embodiment 3 Transformer for electric locomotive of the present invention

[0078] The transformer structure and coil curing process for electric locomotives of the present invention are the same as those in Example 1, the only difference being that in the pouring method, step 1) the medium and low viscosity resin formula is:

[0079] Phenolic resin 44wt%;

[0080] Methyltetrahydrophthalic anhydride 42wt%;

[0081] Polypropylene glycol 3wt%;

[0082] N, N-benzyldimethylamine 6wt%;

[0083] Inorganic pigment 5wt%.

[0084] The formula of unsaturated polyester insulating dipping varnish in step 2) is:

[0085] Polyethylene terephthalate: 92%;

[0086] Solvent: 8%.

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Abstract

The invention discloses an epoxy resin pouring dry type transformer for an electric locomotive. The transformer comprises an iron core which is formed by connecting of a plurality of core limbs which are arranged transversely, a secondary coil and a primary coil are arranged on each core limb from interior to exterior in sequence, and an air flue is formed between each secondary coil and each primary coil. The cross sections of the core limbs, the secondary coils and the primary coils are of a rectangular shape, each air flue comprises a transverse air flue and a longitudinal air flue communicated with the transverse air flue, the width of each transverse air flue is formed by the transverse distance between each secondary coil and each primary coil, the width of each longitudinal air flue is formed by the longitudinal distance between each secondary coil and each primary coil, and the width of each longitudinal air flue is larger than that of each transverse air flue. The epoxy resin pouring dry type transformer is small in size and light in weight, can satisfy impedance requirements, has good waterproof effect, and can sufficiently cope with all kinds of special operating environments encountered in the process of operating of the epoxy resin pouring dry type transformer for the electric locomotive.

Description

technical field [0001] The invention relates to a transformer, in particular to an epoxy resin casting dry-type transformer for electric locomotives. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the load type, it can be divided into: distribution transformer, power transformer, etc.; according to the cooling method, it can be divided into: dry-type transformer, oil-immersed transformer, etc.; according to the structure form, it can be divided into: single-phase transformer, three-phase transformer, etc. Among them, dry-type transformers rely on air convection for cooling. Simply put, dry-type transformers refer to transformers whose iron co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/08H01F27/30H01F27/32C08L61/06C08L71/08C08K5/092C08K5/17C09D167/02C09D167/06
Inventor 蔡定国陈开全唐金权黎剑锋
Owner PEARL ELECTRIC
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