Double-layer pouring structure of induction transformer

Abstract

The double-layer pouring structure of the induction transformer comprises an iron core, a winding and an insulation protection pouring structure, the winding is wound on the outer side wall of the iron core, the insulation protection pouring structure comprises an epoxy resin layer and an organic silica gel layer, the organic silica gel layer wraps the outer side of the iron core and the winding, and the epoxy resin layer wraps the outer side of the organic silica gel layer. The insulating protection layer of the iron core is formed by the organic silica gel layer and the epoxy resin layer, the iron core is completely covered and wrapped by the organic silica gel layer, so that the iron core is protected, the epoxy resin is wrapped outside the organic silica gel layer, the strength is enhanced, and compared with the epoxy resin and the organic silica gel, the iron core is softer and cannot be scratched, and the service life of the iron core is prolonged. The epoxy resin is more suitable for direct contact with the iron core, and the epoxy resin is harder in texture and more suitable for wrapping the outer side of the organic silica gel layer, so that the supporting effect is enhanced.

Description

Technical Field

[0001] The utility model relates to a double-layer casting structure of an inductance transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.

[0003] Transformers can be divided into the following categories according to their uses: distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, corner transformers, high current transformers, excitation transformers, etc.

[0004] At present, in order to protect the iron core from damage, epoxy resin is usually poured on the outside of the iron core as an insulating protective layer to protect the iron core. Epoxy resin is a high-performance thermosetting plastic that is widely used in the insulation protection of power equipment. It has high insulation properties, good mechanical strength, beneficial chemical resistance, waterproof properties, and aging resistance. However, its texture after solidification is hard and will scratch the iron core and cause equipment damage. Utility Model Content

[0005] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a double-layer casting structure for an inductor transformer.

[0006] A double-layer cast structure of an inductor transformer comprises an iron core, a winding, an insulating protection cast structure and a shell. The winding is wound on the outer wall of the iron core. The insulating protection cast structure comprises an epoxy resin layer and an organic silicone layer. The organic silicone layer is wrapped on the outer side of the iron core and the winding, the epoxy resin layer is wrapped on the outer side of the organic silicone layer, and the shell is wrapped on the outside of the insulating protection cast structure.

[0007] Preferably, the organic silica gel layer completely covers the highest point of the iron core.

[0008] Preferably, the outer surface of the organic silica gel layer is coated with a semi-conductive shielding layer.

[0009] Preferably, the winding is formed by cross-winding copper or aluminum wires.

[0010] Preferably, the material of the iron core is one of soft ferrite, silicon steel sheet, powdered iron core material, amorphous alloy, and silicon-aluminum alloy.

[0011] Beneficial effects: Compared with the prior art, the utility model forms an insulating protective layer of the iron core through an organic silicone layer and an epoxy resin layer, and the organic silicone layer completely covers and wraps the iron core, thereby protecting the iron core. Secondly, the epoxy resin is wrapped on the outside of the organic silicone layer to enhance the strength. Compared with epoxy resin, organic silicone is softer and will not scratch the iron core. It is more suitable for direct contact with the iron core. Epoxy resin is harder in texture and is more suitable for wrapping on the outside of the organic silicone layer to enhance the supporting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a perspective view of a double-layer cast structure of an inductor transformer;

[0013] Figure 2 It is an external schematic diagram of a double-layer cast structure of an inductor transformer;

[0014] Figure 3 It is a schematic diagram of the inner core of a double-layer cast structure of an inductor transformer;

[0015] In the figure, 1, iron core, 2, organic silicone layer, 3, epoxy resin layer. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0017] like Figure 1 As shown, an iron core 1, an organic silicone layer 2, and an epoxy resin layer 3;

[0018] A double-layer cast structure of an inductor transformer comprises an iron core 1, a winding, an insulating protection cast structure, and a shell. The shell is at the outermost side of the overall structure, and an electric core composed of the iron core and the winding is located at the innermost side of the overall structure. The insulating protection cast structure is between the shell and the electric core. The winding is wound on the outer wall of the iron core 1. The winding is formed by cross-winding copper or aluminum wires. The material of the iron core 1 is one of soft ferrite, silicon steel sheet, powder iron core 1 material, amorphous alloy, and silicon-aluminum alloy.

[0019] The insulating protection casting structure includes an epoxy resin layer 3 and an organic silicone layer 2. The organic silicone layer 2 is wrapped around the outside of the iron core 1 and the winding and completely covers the highest point of the iron core 1. The outer surface of the organic silicone layer 2 is coated with a semi-conductive shielding layer. The epoxy resin layer 3 is wrapped around the outside of the organic silicone layer 2. The outlet terminal adopts a cable-type outlet.

[0020] When the transformer is working, the hysteresis loss of the core, the winding loss of the coil and the dielectric loss of the insulating medium at high frequency will generate heat, which will cause the local temperature to be too high, affecting the service life and working efficiency of the transformer. Therefore, the thermal conductivity of the insulating medium will become the key. The better the heat dissipation performance of the insulating medium, the longer the service life of the transformer, the higher the working efficiency and the better the performance.

[0021] Epoxy resin, also known as artificial resin, is a type of organic high molecular polymer containing more than two epoxy groups in its molecular structure and is a thermoplastic plastic. Epoxy resin can undergo cross-linking reactions with various types of curing agents to form an insoluble, infusible polymer with a three-dimensional network structure. Therefore, it has excellent insulation properties, mechanical properties and chemical stability, and is a good material for transformer insulation. However, after solidification, its texture is hard and will scratch the battery core, while organic silicone is softer and will not damage the iron core.

[0022] Silicone rubber, also known as silicone rubber, is a polymer compound composed of silicon, oxygen and carbon. It is a thermosetting polymer with good physical and chemical properties, as follows: High electrical insulation performance, it has high resistivity and high dielectric strength, which can effectively prevent electrical short circuits and leakage;

[0023] Good temperature resistance: Silicone rubber can remain stable over a wide temperature range, from extremely low temperatures to about 200 degrees Celsius, making it suitable for a variety of environments.

[0024] Excellent weather resistance: Silicone rubber has good resistance to UV rays, ozone and oxidation, making it suitable for outdoor use and able to protect transformers from adverse weather conditions.

[0025] Good mechanical properties: Silicone rubber is flexible and elastic, able to withstand vibration and shock, and reduce damage to the transformer caused by mechanical stress.

[0026] Excellent waterproof performance: Organic silicone has good waterproof performance, which can prevent water and moisture from penetrating into the inside of the transformer, thereby protecting the transformer from corrosion and short circuit.

[0027] Chemical stability: Silicone rubber is resistant to most chemicals and is not easily corroded, thus protecting the transformer from chemical corrosion.

[0028] Easy processing: Silicone rubber can be applied to the transformer by pouring, spraying or brushing to form a uniform protective layer.

[0029] Good bonding properties: Silicone can adhere tightly to various material surfaces, including metals, ceramics and plastics, providing overall protection.

[0030] Biological inertness: Organic silicone is relatively harmless to organisms and is not prone to the growth of bacteria and mold, making it suitable for use in sensitive environments.

[0031] Fire resistance: Certain organic silicone materials have good flame retardant properties, which can slow the spread of fire and improve the safety of transformers.

[0032] Environmentally friendly: Organic silicone materials are generally environmentally friendly, do not contain harmful substances, and meet modern environmental protection requirements.

[0033] Aesthetics: Silicone coating provides a smooth, uniform appearance that helps improve the overall aesthetics of the transformer.

[0034] Easy maintenance: The silicone coating is easy to clean and maintain, helping to maintain the long-term stable operation of the transformer.

[0035] From the above, it can be seen that compared with traditional epoxy resin, the combination of epoxy resin and organic silicone is more suitable for making the insulation protection layer of the solid-state transformer core. The organic silicone layer protects the core, and the epoxy resin is combined to increase the supporting strength of the overall structure.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer casting structure of an inductor transformer, characterized in that: It includes an iron core, a winding, an insulating protection casting structure, and a shell. The winding is wound on the outer wall of the iron core. The insulating protection casting structure includes an epoxy resin layer and an organic silicone layer. The organic silicone layer is wrapped on the outside of the iron core and the winding, the epoxy resin layer is wrapped on the outside of the organic silicone layer, and the shell is wrapped on the outside of the insulating protection casting structure.

2. The double-layer casting structure of an inductor transformer according to claim 1, characterized in that: The organic silica gel layer completely covers the highest point of the iron core.

3. The double-layer casting structure of an inductor transformer according to claim 1, characterized in that: The outer surface of the organic silica gel layer is coated with a semi-conductive shielding layer.

4. The double-layer casting structure of an inductor transformer according to claim 1, characterized in that: The winding is formed by cross-winding copper or aluminum wires.

5. The double-layer casting structure of an inductor transformer according to claim 1, characterized in that: The material of the iron core is one of soft ferrite, silicon steel sheet, powder iron core material, amorphous alloy and silicon aluminum alloy.

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