CN221573626U

CN221573626U - Self-cooling transformer

Info

Publication number: CN221573626U
Application number: CN202323412793.1U
Authority: CN
Inventors: 袁宁
Original assignee: Dongguan Hongji Electronic Co ltd
Current assignee: Dongguan Hongji Electronic Co ltd
Priority date: 2023-12-14
Filing date: 2023-12-14
Publication date: 2024-08-20
Anticipated expiration: 2033-12-14

Abstract

The utility model relates to the technical field of transformers, and discloses a self-cooling type transformer. Comprises a shell, an iron core and a coil. The shell comprises side plates and a bottom plate, and the side plates are arranged on two sides of the bottom plate; the iron core is arranged on the bottom plate, and the iron core and the bottom plate are arranged in an insulating way; the coil is wound on the iron core; the iron core and the coil are connected with the bottom plate, and the iron core and the coil can transfer heat to the bottom plate. The coil and the magnetic core are arranged on the bottom plate, side plates are arranged on two sides of the bottom plate, and the side plates are arranged on two sides of the bottom plate. The heat generated by the coil and the magnetic core can be transferred to the bottom plate and exchanged with the outside air through the bottom plate, so that the temperature of the coil and the magnetic core is reduced. In addition, be provided with the curb plate in the both sides of bottom plate, can increase the radiating area of bottom plate through the curb plate of both sides to further improve radiating efficiency.

Description

Self-cooling transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to a self-cooling type transformer.

Background

A Transformer (Transformer) is a device for changing ac voltage by using the principle of electromagnetic induction, and its main components are an iron core and a coil, the iron core of the Transformer is in an alternating magnetic field, and the magnetic flux is continuously changed to cause hysteresis of the iron core material, so that hysteresis loss is generated. In addition, the alternating magnetic field also generates eddy currents in the core, resulting in eddy current loss. Both losses are converted into heat. The coil of the transformer is formed of wires, the resistance of which causes resistance to flow past it, thus creating resistive losses, which are also converted into heat. If heat is not dissipated, the high temperature may cause the device to short.

At present, the transformer is cooled by oil immersion self-cooling, however, leakage of cooling oil can occur, and fire and environmental pollution risks are caused.

Disclosure of utility model

The embodiment of the utility model aims to provide a self-cooling transformer so as to solve the technical problem that the transformer is cooled by oil immersion self-cooling in the prior art, but leakage of cooling oil is likely to occur.

The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows:

There is provided a self-cooling transformer comprising:

The shell comprises side plates and a bottom plate, and the side plates are arranged on two sides of the bottom plate;

the iron core is arranged on the bottom plate, and the iron core and the bottom plate are arranged in an insulating manner;

The coil is wound on the iron core;

Wherein, the iron core with the coil all with the bottom plate is connected, the iron core with the coil can be with heat transfer to the bottom plate.

In some embodiments, the bottom plate is an insulating material.

In some embodiments, the core is formed by superposition of silicon steel sheets.

In some embodiments, the iron core further comprises an upper clamping plate, wherein the upper clamping plate is arranged on two sides of the top of the iron core, and insulating supports are arranged on two sides of the upper clamping plate.

In some embodiments, an insulator is disposed on the insulating support.

In some embodiments, the bottom of the base plate is further provided with heat dissipation brackets, the heat dissipation brackets are arranged at intervals and the heat dissipation brackets can be used for supporting the base plate.

In some embodiments, the iron core further comprises a lower clamping plate, wherein the lower clamping plate is arranged on two sides of the bottom of the iron core.

Compared with the prior art, in the self-cooling transformer provided by the embodiment of the utility model, the coil and the magnetic core are arranged on the bottom plate, the two sides of the bottom plate are provided with the side plates, and the side plates are arranged on the two sides of the bottom plate. The heat generated by the coil and the magnetic core can be transferred to the bottom plate and exchanged with the outside air through the bottom plate, so that the temperature of the coil and the magnetic core is reduced. In addition, be provided with the curb plate in the both sides of bottom plate, can increase the radiating area of bottom plate through the curb plate of both sides to further improve radiating efficiency.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of a self-cooling transformer according to an embodiment of the present utility model;

Fig. 2 is a front view of a self-cooling transformer according to an embodiment of the present utility model.

Reference numerals:

100. A self-cooling transformer; 10. a housing; 11. a bottom plate; 12. a side plate; 20. an iron core; 30. a coil; 40. an upper clamping plate; 41. an insulating support; 42. an insulator; 50. a lower clamping plate; 60. and a heat dissipation bracket.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "left," "right," "upper," "lower," "top," and "bottom," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In an embodiment of the utility model, the self-cooled transformer can be used to vary the voltage of the alternating current. It can transfer electrical energy from one circuit to another by electromagnetic coupling without changing the total power of the electrical energy.

The self-cooling transformer provided by the embodiment of the application is described in detail below with reference to fig. 1 to 2.

Referring to fig. 1 and fig. 2 together, fig. 1 is a schematic structural diagram of a self-cooling transformer according to an embodiment of the utility model; fig. 2 is a front view of a self-cooling transformer according to an embodiment of the present utility model. A self-cooling transformer 100 according to one embodiment of the present utility model includes a housing 10, a core 20, and a coil 30. The shell 10 comprises a side plate 12 and a bottom plate 11, wherein the side plate 12 is arranged on two sides of the bottom plate 11; the iron core 20 is arranged on the bottom plate 11, and the iron core 20 and the bottom plate 11 are arranged in an insulating way; the coil 30 is wound around the iron core 20; the iron core 20 and the coil 30 are connected to the base plate 11, and the iron core 20 and the coil 30 can transfer heat to the base plate 11.

The core 20 is typically a magnetic circuit portion in a transformer. Its main function is to concentrate and guide the magnetic field. The core 20 provides a low reluctance path to direct the magnetic field into the coil 30. By using the core 20, the transformer can efficiently transfer and convert electric energy. The coil 30 is a coil-shaped wire wound from an insulated wire. It is generally divided into two parts: a primary coil 30 and a secondary coil 30. The primary coil 30 is connected to a primary power source, while the secondary coil 30 is connected to a load. When the current in the primary coil 30 changes, corresponding electromagnetic induction is generated in the secondary coil 30 through mutual inductance, so that the voltage and the current are changed.

Wherein the core 20 generates heat when the transformer is operated. Specifically, when an alternating current flows through the core 20, hysteresis and eddy current loss occur inside the core 20 because the permeability of the core 20 is not infinite. These energy losses are converted to heat and cause the temperature of core 20 to rise.

And, the coil 30 also generates heat. Specifically, the current in coil 30 may cause joule heating from the resistance of the coil 30 material. This is due to electron collisions and energy conversion that occur when current passes through the resistive material, thereby generating thermal energy.

In the present embodiment, the coil 30 and the magnetic core are both disposed on the bottom plate 11, and the bottom plate 11 is provided with the side plates 12 on both sides, and the side plates 12 are disposed on both sides of the bottom plate 11. The heat generated by the coil 30 and the magnetic core can be transferred to the base plate 11 and exchanged with the outside air through the base plate 11, thereby lowering the temperature of the coil 30 and the magnetic core. In addition, the side plates 12 are provided on both sides of the bottom plate 11, and the heat radiation area of the bottom plate 11 can be increased by the side plates 12 on both sides, thereby further improving the heat radiation efficiency.

The base plate 11 and the core 20 are provided to be insulated from each other. Insulation between the base plate 11 and the core 20 can prevent an electrical short. Since the iron core 20 is made of a conductive material, if it directly contacts the bottom plate 11, current conduction between the iron core 20 and the bottom plate 11 may occur, forming a short circuit path, thereby affecting normal operation of the transformer or even causing a malfunction. And the insulation between the base plate 11 and the core 20 can also reduce inductance loss. The core 20 plays a role in magnetic conduction in the transformer, and if it is directly contacted with the base plate 11, eddy current loss is caused, resulting in conversion of electric energy into heat energy, resulting in unnecessary energy loss. The arrangement of the insulating layer can reduce the influence of the iron core 20 on the bottom plate 11 and improve the energy efficiency performance of the transformer.

In some embodiments, the base plate 11 is an insulating material. The base plate 11 is typically designed as part of an insulating material, the purpose of which is to ensure safe operation of the transformer and to prevent potential electrical hazards. The insulating layer of the base plate 11 may be made of insulating paper, insulating board or other insulating material. By isolating the base plate 11 from the core 20, the insulating layer can prevent direct contact and short circuit of the current conducted from the core 20, thereby protecting the normal operation of the transformer. In addition, the insulating layer between the base plate 11 and the core 20 plays an important role in heat dissipation. During transformer operation, core 20 is energized by an electrical current, creating a magnetic field and generating heat. The provision of an insulating layer reduces the conduction of thermal energy to the soleplate 11 and further dissipates heat into the surrounding air to keep the temperature of the transformer stable. This helps to prevent overheating of the transformer, protecting the safety and reliability of the insulation and other components.

Specifically, the base plate 11 may be an insulating plate. The insulating board is a firm board made of cellulose, resin or reinforcing material, and has good electrical insulating property and mechanical strength. The insulating plate forms an insulating layer between the base plate 11 and the core 20, and provides effective insulation and protection.

In some embodiments, the core 20 is formed by stacking silicon steel sheets. The iron core 20 is formed by stacking silicon steel sheets into a laminated iron core 20. The laminated core 20 is a structure in which a sheet of silicon steel is stacked together and fastened together by fasteners to form a unitary structure. Laminated core 20 is commonly used in power equipment such as power transformers, inductors, and inductive components and is primarily intended to provide a magnetic flux path of high permeability and low magnetic loss. By the laminated design, the magnetic loss and the energy loss of the iron core 20 can be effectively reduced, and the efficiency and the performance of the equipment are improved.

The silicon steel sheet has characteristics of high magnetic permeability and low magnetic loss, and the iron core 20 formed by superposition can provide a more efficient magnetic flux path, thereby reducing energy loss. The magnetic loss of the iron core 20 can be reduced, and the efficiency and performance of the apparatus can be improved. By stacking the iron core 20 formed of a plurality of silicon steel sheets, the thickness of the iron core 20 and the effective magnetic flux cross-sectional area can be increased, thereby improving the magnetic flux density. The high magnetic flux density can significantly increase the power density of the device, enabling the device to have a higher output power at the same volume or weight. The laminated core 20 is more robust and stable in structure, and can reduce vibration and noise of the core 20. This makes the noise that equipment produced in the operation process lower, improves the operational environment and the reliability of equipment. The laminated core 20 can firmly fix the silicon steel sheets together by the fasteners, so that the core 20 is more stable and reliable in structure. This makes the manufacture and maintenance of the iron core 20 more convenient, and the disassembly and replacement of the damaged silicon steel sheet can be more easily performed, improving the maintainability and reliability of the apparatus.

Silicon steel sheets are an important material for manufacturing the iron core 20. It is made of cold rolled non-oriented silicon steel sheet with high silicon content. The silicon steel sheet has excellent magnetic permeability and low magnetic loss characteristics, and can effectively guide and transmit a magnetic field, thereby reducing energy loss. This makes silicon steel sheet an ideal material for manufacturing the iron core 20 in power equipment such as power transformers, inductors, and inductance elements. The manufacturing process of the silicon steel sheet mainly comprises the following steps: firstly, selecting a high-purity cold-rolled silicon steel plate as a raw material; then, the silicon steel plate is pressed into the required thickness through a cold rolling process; then, the silicon steel sheet is treated by annealing, surface treatment and other processes to improve the magnetic conductivity and magnetic property of the silicon steel sheet; finally, the silicon steel sheet is cut and shaped to be manufactured into the required shape and size. The silicon steel sheet has excellent magnetic permeability and low magnetic loss characteristics. These characteristics enable the silicon steel sheet to effectively reduce energy loss in the iron core 20, improving efficiency and performance of the apparatus. In addition, the silicon steel sheet has the characteristics of low temperature rise and good thermal stability, and can keep stable magnetic performance in a high-temperature environment.

The silicon content of the silicon steel sheet is usually 3.0% to 4.5%, and the higher the silicon content is, the higher the magnetic permeability is, and the better the magnetic properties are.

In some embodiments, the iron core 20 further comprises an upper clamping plate 40, wherein the upper clamping plate 40 is arranged at two sides of the top of the iron core 20, and two sides of the upper clamping plate 40 are provided with insulating brackets 41. The upper clamping plate 40 is used to fix the top of the iron core 20, and insulating holders 41 are provided at both sides of the upper clamping plate 40, and the insulating holders 41 can be used to insulate electricity, preventing the transformer from being shorted.

In some embodiments, the insulating support 41 is provided with an insulator 42. Insulator 42 is an insulating element and insulator 42 provides electrical insulation and mechanical support between core 20 and the windings. The insulator 42 can effectively isolate the high voltage part from the low voltage part of the power equipment, prevent leakage and short circuit of current, and ensure safe operation of the equipment. The insulator 42 is typically made of an insulating material such as ceramic, fiberglass, plastic, or the like. The materials have good insulating property, can effectively block the flow of current and avoid accidents of electrical equipment. In addition, the insulator 42 has mechanical strength and high temperature resistance and is capable of withstanding the operating load and environmental conditions of the electrical equipment.

In some embodiments, the bottom of the base plate 11 is further provided with heat dissipation brackets 60, the heat dissipation brackets 60 are spaced apart and the heat dissipation brackets 60 can be used to support the base plate 11. The air-cooled heat dissipation is performed through the bottom of the heat dissipation bracket 60 toward the self-cooling transformer 100, and the flowing air can flow toward the core 20 and the coil 30 through the heat dissipation bracket 60, thereby further improving the heat dissipation efficiency.

In some embodiments, the lower clamping plate 50 is further included, and the lower clamping plate 50 is disposed at both sides of the bottom of the iron core 20. The lower clamping plate 50 and the upper clamping plate 40 clamp both ends of the iron core 20 together to fix the position of the iron core 20.

It should be specifically noted that, the self-cooling transformer 100 provided in the embodiment of the present utility model only shows a portion related to the technical problem to be solved in the embodiment of the present utility model, and it is understood that the self-cooling transformer 100 provided in the embodiment of the present utility model further includes other structures for implementing the functions of the self-cooling transformer 100.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A self-cooling transformer, comprising:

The coil is wound on the iron core;

2. The self-cooling transformer of claim 1, wherein the base plate is an insulating material.

3. The self-cooling transformer according to claim 2, wherein the iron core is formed by stacking silicon steel sheets.

4. A self-cooling transformer according to claim 3, further comprising an upper clamping plate provided on both sides of the top of the core, and both sides of the upper clamping plate are provided with insulating brackets.

5. The self-cooling transformer of claim 4, wherein the insulating support is provided with an insulator thereon.

6. The self-cooling transformer of claim 5, wherein the bottom of the base plate is further provided with heat-dissipating brackets, the heat-dissipating brackets being spaced apart and operable to support the base plate.

7. The self-cooling transformer of claim 6, further comprising lower clamping plates disposed on both sides of the bottom of the core.