Transformer winding structure

Abstract

The utility model discloses a transformer winding structure, which relates to the technical field of transformers, and comprises a magnetic core, a main winding and an auxiliary winding, the main winding is wound on the periphery of the magnetic core in a single-layer fitting manner by adopting a single-strand multi-core wire, the auxiliary winding is wound on the periphery of the main winding side by side by adopting N-strand multi-core wires, and N is an integer greater than or equal to two. According to the utility model, the main winding adopts the single-strand multi-core wire, under the condition of the same cross section area, the number of turns of the single-strand winding is less than that of the multi-strand winding, and the inductance is correspondingly reduced, so that the alternating-current impedance is reduced, and the energy conversion performance of the transformer is improved; according to the secondary winding, N strands of multi-core wires are adopted, under the condition of the same cross sectional area, compared with a single strand, the multi-strand wires increase the conductor surface area through which current flows, loss caused by the skin effect can be remarkably reduced, meanwhile, the current density is effectively dispersed, and the heat dissipation capacity is improved. The secondary winding is wound on the periphery of the main winding, mutual inductance interference between the secondary winding and the main winding can be effectively reduced, energy loss is reduced, and the energy conversion efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially is related to a transformer winding structure. BACKGROUND

[0002] As the key core equipment in the power system, the transformer undertakes the important task of voltage conversion, power transmission and power distribution, and its performance is directly related to the operation efficiency and reliability of the power system. In the modern high-efficiency power supply demand, the transformer needs to have the characteristics of high efficiency, low loss and high reliability to adapt to the complex power supply demand in the fields of industry, data center, intelligent manufacturing, etc. However, due to the limitations of materials, process and design method, the traditional transformer design often has difficulty in achieving the best balance among efficiency, reliability and adaptability. In recent years, with the rapid development of power electronics technology, the application range of the transformer has been further expanded, and higher performance requirements have been put forward for it. Especially in the scenes of new energy, data center, high-efficiency power supply system, etc., the transformer needs to perform outstandingly in high power density, high efficiency and high reliability, etc. to meet the stringent standards of modern power demand.

[0003] The improvement of winding structure is an important direction to improve the performance of transformer. At present, various winding design schemes with anti-eddy current loss, anti-leakage magnetic and high conductivity performance have been developed. Although the existing technology has made certain breakthroughs, there are still deficiencies in matching the electromagnetic characteristics of the main and auxiliary windings, controlling the skin effect and the distribution of current density, and the contradictions of the transformer in energy conversion efficiency, reliability and adaptability have not been completely solved. SUMMARY

[0004] The utility model aims at providing a transformer winding structure to solve the problems existing in the prior art, reduce the AC impedance of the main winding, improve the energy conversion efficiency, reduce the skin effect of the auxiliary winding, effectively disperse the current density, and improve the heat dissipation capacity.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0006] A transformer winding structure, comprising a magnetic core, a main winding and an auxiliary winding, the main winding is wound on the outer periphery of the magnetic core by single-core multi-core wire single-layer lamination, the auxiliary winding is wound on the outer periphery of the main winding by N-core multi-core wire side by side, and N is an integer greater than or equal to two.

[0007] In an exemplary embodiment, the auxiliary winding is wound on the outer periphery of the main winding by double-core multi-core wire side by side.

[0008] In an exemplary embodiment, the wire diameter of the core of the single-core multi-core wire of the main winding is 0.05mm-0.2mm.

[0009] In an exemplary embodiment, the number of cores of the single-strand multi-core wire of the main winding is 500.

[0010] In an exemplary embodiment, the diameter of the cores of the N-strand multi-core wire of the auxiliary winding is 0.1mm-0.3mm.

[0011] In an exemplary embodiment, the number of cores of the N-strand multi-core wire of the auxiliary winding is 250.

[0012] In an exemplary embodiment, an insulating material is arranged between the main winding and the auxiliary winding for isolation.

[0013] In an exemplary embodiment, support portions are arranged on both sides of the magnetic core, the support portions comprising vertical portions and horizontal portions arranged at both ends of the vertical portions, and the horizontal portions being fixedly connected with both ends of the magnetic core.

[0014] In an exemplary embodiment, the magnetic core comprises an upper magnetic core and a lower magnetic core which are bonded to each other, and the support portions comprise an upper support portion and a lower support portion which are bonded to each other, the upper support portion comprising a first vertical portion and a first horizontal portion arranged at an upper end of the first vertical portion, and the first horizontal portion being fixedly connected with an upper end of the upper magnetic core; the lower support portion comprising a second vertical portion and a second horizontal portion arranged at a lower end of the second vertical portion, and the second horizontal portion being fixedly connected with a lower end of the lower magnetic core.

[0015] In an exemplary embodiment, the upper magnetic core, the lower magnetic core, the upper support portion and the lower support portion are integrally formed.

[0016] The utility model discloses relative to prior art has obtained following technical effect:

[0017] 1、 in the transformer, the main winding is mainly responsible for bearing input current, and the magnetic flux is generated, therefore, in actual application, the main winding needs to overcome the main problem of how to improve the conversion efficiency of electric energy;The auxiliary winding is according to input current and the induced electromotive force of the magnetic flux of main winding, and then is converted into output voltage signal, and the main problem that it needs to overcome is the heat dissipation problem.In the utility model, the main winding is through the single-strand multi-core wire, and the number of turns of single-strand is less than that of multi-strand in the same cross-sectional area, and the inductance is reduced accordingly, thereby reducing the ac impedance, and improving the energy conversion performance of the transformer;The auxiliary winding is through the N-strand multi-core wire, and N is an integer greater than or equal to two, and the conductor surface area of current flow is increased in the same cross-sectional area, and the loss caused by skin effect can be significantly reduced, the current density is effectively dispersed, and the heat dissipation capacity is improved.

[0018] 2、 the auxiliary winding is wound on the outer periphery of the main winding, and the mutual inductance interference between the auxiliary winding and the main winding can be effectively reduced, the energy loss is reduced, and the energy conversion efficiency is further improved.

[0019] The other technical solutions disclosed by the utility model have the following technical advantages:

[0020] 3. By setting the insulating material for isolation between the main winding and the secondary winding, the reliability and stability of the transformer in long-term operation are obviously improved.

[0021] 4. The upper magnetic core, the lower magnetic core, the upper support part and the lower support part are integrally formed, effectively avoiding the structural defects that may be caused by traditional welding, so that the transformer has better structural strength.

[0022] 5. The upper magnetic core and the lower magnetic core are bonded, and the upper support part and the lower support part are bonded, so as to avoid the problems of vibration or noise caused by bolts and other fasteners. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 The structural diagram of the transformer winding structure disclosed in the specific embodiment of the utility model is shown in the figure.

[0025] Figure 2 The structural diagram of the magnetic core and the support part is shown in the figure. Figure 1

[0026] Wherein, 1, magnetic core; 2, secondary winding; 3, support part; 4, upper support part; 5, lower support part; 6, upper magnetic core; 7, lower magnetic core; 8, first vertical part; 9, second vertical part; 10, first horizontal part; 11, second horizontal part. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] ​It is to be understood that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the disclosed content, so as to be understood and read by those skilled in the art, and do not have technical substantial meaning, and any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the present application, should still fall within the scope of the disclosed technology.

[0029] It should be noted that the same reference signs in the drawings of the present application represent the same components or the same parts.

[0030] The present application provides a transformer winding structure to solve the problems existing in the prior art, reduce the AC impedance of the main winding, improve the energy conversion efficiency, reduce the skin effect of the secondary winding, effectively disperse the current density, and improve the heat dissipation capacity.

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0032] Please refer to Figures 1 to 2 The present application provides a transformer winding structure, which comprises a magnetic core 1, a main winding and a secondary winding 2, the main winding is wound on the outer periphery of the magnetic core 1 by single-layer lamination with single-core multi-core wire, and the secondary winding 2 is wound on the outer periphery of the main winding by side-by-side with N-core multi-core wire, wherein N is an integer greater than or equal to two.

[0033] In the transformer, the main winding is mainly responsible for bearing the input current and generating magnetic flux, so in practical application, the main problem that the main winding needs to overcome is how to improve the conversion efficiency of electric energy; the auxiliary winding 2 generates induced electromotive force according to the input current and the magnetic flux of the main winding, and then converts it into an output voltage signal, and the main problem that it needs to overcome is the heat dissipation problem. In the utility model, the main winding adopts single-core multi-core wire, and under the condition of the same cross-sectional area, the number of turns of single-core winding is less than that of multi-core winding, the inductance is correspondingly reduced, thereby reducing the alternating current impedance and improving the energy conversion performance of the transformer; the auxiliary winding 2 adopts N-core multi-core wire, N is an integer greater than or equal to two, and under the condition of the same cross-sectional area, the multi-core wire increases the conductor surface area through which the current flows compared with the single-core wire, which can significantly reduce the loss caused by the skin effect, effectively disperse the current density, and improve the heat dissipation capacity.

[0034] Specifically, the diameter of the core of the single-core multi-core wire of the main winding is 0.05mm-0.2mm, preferably 0.1mm, and the number of cores is 500, which has the characteristics of small wire diameter, good electrical conductivity, strong current impact resistance and the like. The auxiliary winding 2 adopts double-core multi-core wire and is wound side by side on the outer periphery of the main winding, and the diameter of the core of the double-core multi-core wire of the auxiliary winding 2 is 0.1mm-0.3mm, preferably 0.2mm, and the number of cores is 250.

[0035] The main winding is arranged in a single-layer tight winding mode closely attached to the magnetic core 1, thereby reducing the leakage magnetic phenomenon caused by irregular winding structure; the auxiliary winding 2 is wound outside the main winding, thereby effectively reducing the mutual inductance interference between the auxiliary winding 2 and the main winding. The main winding and the auxiliary winding 2 need to be uniformly wound to ensure uniform magnetic flux distribution and reduce the leakage magnetic phenomenon; at the same time, the optimized design of the winding specification and the number of turns meets the electromagnetic characteristic matching requirement between the main winding and the auxiliary winding 2, thereby realizing the improvement of the efficiency of the transformer.

[0036] When winding the main winding and the auxiliary winding 2, the winding tension needs to be controlled first. A constant mechanical tension device is adopted in the winding process to ensure that the winding tension of the main winding and the auxiliary winding 2 is always consistent, thereby avoiding the deformation of the coil or the uneven distribution density caused by uneven winding. In addition, high-quality insulating materials are arranged between the main winding and the auxiliary winding 2 for isolation, thereby avoiding the electrical contact between the main winding and the auxiliary winding 2, improving the safety of the entire transformer device, and obviously improving the reliability and stability of the transformer in long-term operation.

[0037] As a preferred scheme of the embodiment, support parts 3 are arranged on both sides of the magnetic core 1, the support parts 3 include vertical parts and horizontal parts arranged at both ends of the vertical parts, and the horizontal parts are fixedly connected with both ends of the magnetic core 1.

[0038] Further, the magnetic core 1 comprises the upper magnetic core 6 and the lower magnetic core 7 which are bonded to each other, the support part 3 comprises the upper support part 4 and the lower support part 5 which are bonded to each other, the upper support part 4 comprises the first vertical part 8 and the first horizontal part 10 arranged at the upper end of the first vertical part 8, and the first horizontal part 10 is fixedly connected with the upper end of the upper magnetic core 6; the lower support part 5 comprises the second vertical part 9 and the second horizontal part 11 arranged at the lower end of the second vertical part 9, and the second horizontal part 11 is fixedly connected with the lower end of the lower magnetic core 7.

[0039] As a preferred scheme of the embodiment, the upper magnetic core 6, the lower magnetic core 7, the upper support part 4 and the lower support part 5 are integrally formed, for example, integrally cast, so that structural defects caused by traditional welding process can be avoided, and the transformer has better structural strength.

[0040] The magnetic core 1 is made of silicon steel sheet with high magnetic permeability and low loss, so as to further improve the magnetic circuit efficiency; the support part 3 is made of high-strength magnetic steel, so as to provide excellent mechanical strength and magnetic field closing performance, and is bonded by magnet adhesive, so as to have high bonding strength and avoid vibration or noise caused by mechanical fasteners such as bolts.

[0041] In order to ensure that the edges of the support part 3 are always parallel when the upper and lower parts of the transformer are bonded, a positioning mold matched with the outer contour of the support part 3 is adopted, so as to ensure the parallelism and accurate alignment of the upper and lower magnetic cores 7, and further improve the assembly precision and mechanical performance of the transformer.

[0042] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium; they can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] If the present utility model discloses or involves parts or structural members which are fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the fixed connection between each other can also be replaced by an integral structure (for example, manufactured by integrally forming using casting process) (except for obvious cases where integrally forming process cannot be used).

[0044] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions of the utility model disclosed above include the states or shapes similar, analogous or close to the terms, unless otherwise stated.

[0045] Any component provided by the utility model can be assembled from multiple individual components, or can be a single component manufactured by an integrated forming process.

[0046] Any adaptive changes according to actual requirements are within the protection scope of the utility model.

[0047] It should be noted that, for those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0048] The principles and implementation modes of the utility model are described by applying specific examples in the utility model, and the above embodiment descriptions are only used to help understand the method of the utility model and its core idea; at the same time, for those skilled in the art, according to the idea of the utility model, there will be changes in the specific implementation mode and application scope. In conclusion, the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A transformer winding structure, characterized by: The magnetic core, the main winding and the auxiliary winding, the main winding is single-layered and pasted on the outer periphery of the magnetic core by single-core multi-core wire, and the auxiliary winding is parallel-wound on the outer periphery of the main winding by N-core multi-core wire, N is an integer greater than or equal to two.

2. The transformer winding structure of claim 1, wherein: The auxiliary winding is parallel-wound on the outer periphery of the main winding by double-core multi-core wire.

3. The transformer winding structure of claim 1, wherein: The diameter of the core of the single-core multi-core wire of the main winding is 0.05-0.2 mm.

4. The transformer winding structure of claim 3, wherein: The number of the core of the single-core multi-core wire of the main winding is 500.

5. The transformer winding structure of claim 1, wherein: The diameter of the core of the N-core multi-core wire of the auxiliary winding is 0.1-0.3 mm.

6. The transformer winding structure of claim 5, wherein: The number of the core of the N-core multi-core wire of the auxiliary winding is 250.

7. The transformer winding structure of claim 1, wherein: The main winding and the auxiliary winding are provided with insulation material for isolation.

8. The transformer winding structure of any of claims 1-7, wherein: The magnetic core is provided with support parts on both sides, the support parts include vertical parts and horizontal parts provided at both ends of the vertical parts, and the horizontal parts are fixedly connected with both ends of the magnetic core.

9. The transformer winding structure of claim 8, wherein: The magnetic core includes an upper magnetic core and a lower magnetic core which are bonded to each other, and the support parts include an upper support part and a lower support part which are bonded to each other, the upper support part includes a first vertical part and a first horizontal part provided at the upper end of the first vertical part, and the first horizontal part is fixedly connected with the upper end of the upper magnetic core; the lower support part includes a second vertical part and a second horizontal part provided at the lower end of the second vertical part, and the second horizontal part is fixedly connected with the lower end of the lower magnetic core.

10. The transformer winding structure of claim 9, wherein: The upper magnetic core, the lower magnetic core, the upper support part and the lower support part are integrally formed.

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