Transformer structure capable of reducing temperature rise
By opening an air gap in the magnetic core structure of the transformer and designing a grid hollowing in the skeleton structure, the problems of insufficient heat dissipation capacity and high core loss in the traditional transformer structure are solved, and lower temperature rise and higher stability and efficiency are achieved.
Patent Information
- Application Number
- CN202422101915.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-28
AI Technical Summary
Traditional transformer structures have limitations in heat dissipation and reducing core loss, resulting in temperature rise problems, affecting service life and system stability.
A transformer structure including a core structure and a skeleton structure is designed. The core structure divides the yoke into upper and lower parts by opening a first air gap in the center of the left and right bodies of the magnetic core to increase the heat dissipation area; the wire-pack in the skeleton structure has multiple grid hollows to increase the heat dissipation area and promote heat convection and radiation.
By enhancing heat dissipation capabilities and reducing core loss, the temperature rise of the transformer is significantly reduced, the service life is extended, and the stability and energy conversion efficiency of the system are improved.
Smart Images
Figure CN222952896U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer core structures, in particular to a transformer structure capable of reducing temperature rise. Background Art
[0002] In the field of power transmission and conversion, transformers are key equipment, and their performance directly affects the stability and efficiency of the system. With the continuous growth of power demand, high-power and high-current transformers are increasingly used, but this also brings about the problem of temperature rise. Temperature rise not only affects the service life of the transformer, but may also cause safety accidents. Therefore, reducing the temperature rise of the transformer has become a technical problem that needs to be solved urgently.
[0003] Traditional transformer structures have limitations in heat dissipation and reducing core losses. On the one hand, the traditional structure has insufficient heat dissipation capacity and it is difficult to effectively cope with heat accumulation during high-power operation; on the other hand, the core design does not fully consider the suppression of eddy current losses, resulting in low energy conversion efficiency, further exacerbating the temperature rise problem. At the same time, against this background, the industry has been exploring innovative transformer structures in order to effectively control temperature rise while maintaining high-efficiency conversion. In recent years, although some improvement plans have been proposed, such as optimizing the coil layout and adopting new heat dissipation materials, these plans are still limited in terms of improving heat dissipation efficiency and reducing core losses. Utility Model Content
[0004] In view of the defects in the prior art, the utility model provides a transformer structure with reduced temperature rise.
[0005] A transformer structure for reducing temperature rise comprises a magnetic core structure and a skeleton structure; wherein the magnetic core structure comprises a yoke portion and a magnetic core column, the yoke portion comprises a magnetic core left body located on the left side, a magnetic core right body located on the right side, a magnetic core upper body located on the upper side and a magnetic core lower body located on the lower side, the magnetic core column is integrally connected between the magnetic core left body and the magnetic core right body, a horizontally extending first air gap is provided at the center of the left side surface of the magnetic core left body and the center of the right side surface of the magnetic core right body, the first air gap is used to divide the magnetic core left body and the magnetic core right body into two upper and lower parts; the skeleton structure comprises a wire wrapping barrel located inside the yoke portion and surrounding the magnetic core column, the wire wrapping barrel is provided with a plurality of grid hollows.
[0006] Preferably, a plurality of second air gaps are provided on the side of the magnetic core column along the center line direction. First, by reducing the hysteresis and eddy current losses in the magnetic core, the setting of the second air gap can effectively improve the energy efficiency of the transformer, because the second air gap divides the magnetic circuit, reduces the continuity of the magnetic flux, and thus reduces the unnecessary loss of energy; further, the introduction of the second air gap also helps to avoid the magnetic saturation phenomenon that may occur under large AC signals or DC bias conditions, and the second air gap can reduce the magnetic permeability, so that the magnetic core column can still maintain a linear response under a larger current, thereby ensuring the stable operation of the device; further, compared with the traditional magnetic core column, this multi-section second air gap design not only reduces the loss, but also improves the magnetic permeability and saturation magnetic induction intensity, which makes it have significant advantages in applications that require higher electromagnetic performance and power density, and also provides the possibility of better control of inductance. By accurately adjusting the size and position of the air gap, the inductance value of the electromagnetic component can be accurately controlled, which is crucial for applications that require precise control of the electromagnetic response in the circuit.
[0007] Preferably, a plurality of annular spacers are convexly provided on the outer side of the wire barrel, and a winding area is formed between adjacent spacers. The annular design of the spacers allows each winding area to be clearly defined, which helps to keep the coils neat and orderly during the winding process. Each area can be wound with coils independently, reducing the crossover and interference between different coils and improving the overall quality of the winding; at the same time, the presence of the spacers increases the area of the outer surface of the wire barrel, which helps to dissipate heat. When the transformer is running, the heat generated can be more effectively dissipated to the surrounding environment through the spacers, reducing the temperature rise and further extending the service life of the transformer.
[0008] Preferably, the yoke is provided with heat dissipation holes, which pass through the left body of the magnetic core, the magnetic core column and the right body of the magnetic core in sequence. The formation of the heat dissipation holes provides a direct heat dissipation path. When the transformer is running, the generated heat can be quickly dissipated to the surrounding environment through these holes, thereby effectively reducing the temperature rise of the transformer.
[0009] Preferably, an upper groove is provided on the top surface of the upper body of the magnetic core, and a lower groove is provided on the bottom surface of the lower body of the magnetic core. The upper groove and the lower groove increase the surface area of the magnetic core, which helps to dissipate heat to a certain extent. When the transformer is running, the heat generated can be dissipated to the surrounding environment through these grooves, thereby reducing the temperature rise.
[0010] Preferably, both the upper slot and the lower slot are provided with a through opening facing the skeleton structure. The opening provides an additional heat dissipation path. When the transformer is running, the skeleton structure and the coils thereon will generate heat, which can be directly dissipated to the outside of the upper and lower bodies of the magnetic core through the through opening, thereby enhancing the heat dissipation performance of the transformer and helping to reduce the temperature rise.
[0011] The beneficial effects of the utility model are embodied in:
[0012] In the utility model, a first air gap extending horizontally is opened in the center of the left body and the right body of the magnetic core to divide the yoke part into two parts, the upper and lower parts. This design increases the surface area of the magnetic core, which is beneficial to the dissipation of heat and improves the heat dissipation capacity of the transformer. At the same time, a plurality of grid hollows are opened in the wire wrap barrel in the skeleton structure. This design increases the contact area between the wire wrap barrel and the air, which is conducive to the convection and radiation of heat and further enhances the heat dissipation effect. Furthermore, the design of the first air gap not only enhances the heat dissipation, but also helps to reduce the eddy current loss in the magnetic core. The eddy current is a circular current generated in the magnetic core due to the change of the magnetic field. It will cause energy loss and aggravate the temperature rise. By dividing the yoke part, the path of the eddy current can be interrupted, thereby reducing the eddy current loss and improving the energy conversion efficiency. Furthermore, the enhancement of the heat dissipation capacity and the reduction of the core loss work together to significantly reduce the temperature rise of the transformer, extend the service life of the transformer, and improve the stability of the system. The improvement of the energy conversion efficiency means that when the same power is transmitted, the required input power is reduced, thereby reducing energy consumption and improving the efficiency of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0014] Figure 1 It is a structural stereogram of the utility model;
[0015] Figure 2 It is a structural side view of the utility model.
[0016] Figure 3 For this utility model Figure 2 Structural cross-section view along the AA direction.
[0017] Reference numerals:
[0018] 1-core structure, 11-yoke part, 111-left core body, 112-right core body, 113-upper core body, 114-lower core body, 115-first air gap, 116-heat dissipation hole, 117-upper groove, 118-lower groove, 119-through mouth, 12-core column, 121-second air gap, 2-skeleton structure, 21-wire wrapped tube, 211-grid hollow, 212-isolating sheet. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0022] like Figures 1 to 3 As shown, a transformer structure for reducing temperature rise includes a core structure 1 and a skeleton structure 2; wherein the core structure 1 includes a yoke portion 11 and a core column 12, the yoke portion 11 includes a left core body 111 located on the left, a right core body 112 located on the right, an upper core body 113 located on the upper side, and a lower core body 114 located on the lower side, the left core body 111 and the right core body 112 are integrally connected to the core column 12, a first air gap 115 extending horizontally is provided in the center of the left side surface of the left core body 111 and the center of the right side surface of the right core body 112, and the first air gap 115 is used to divide the left core body 111 and the right core body 112 into two parts, an upper part and an lower part; the skeleton structure 2 includes a wire wrapping barrel 21 located inside the yoke portion 11 and surrounding the core column 12, and the wire wrapping barrel 21 is provided with a plurality of grid hollows 211.
[0023] In this embodiment, it should be noted that by providing a first air gap 115 extending horizontally in the center of the left core body 111 and the right core body 112, the yoke portion 11 is divided into two parts, an upper part and an lower part. This design increases the surface area of the core, which is beneficial to the heat dissipation and improves the heat dissipation capacity of the transformer. At the same time, the wire barrel 21 in the skeleton structure 2 is provided with a plurality of grid hollows 211. This design increases the contact area between the wire barrel 21 and the air, which is beneficial to the convection and radiation of heat and further enhances the heat dissipation effect. Furthermore, the design of the first air gap 115 not only enhances the heat dissipation, but also helps The invention is used to reduce eddy current loss in the magnetic core. Eddy current is a circular current generated in the magnetic core due to changes in the magnetic field. It will cause energy loss and aggravate temperature rise. By dividing the yoke part 11, the path of the eddy current can be interrupted, thereby reducing eddy current loss and improving energy conversion efficiency. Furthermore, the enhanced heat dissipation capacity and the reduced core loss work together to significantly reduce the temperature rise of the transformer, extend the service life of the transformer, and improve the stability of the system. The improvement in energy conversion efficiency means that when transmitting the same power, the required input power is reduced, thereby reducing energy consumption and improving the efficiency of the overall system.
[0024] In one embodiment, a plurality of second air gaps 121 are formed on the side surface of the magnetic core column 12 along the center line direction.
[0025] In the present embodiment, it should be noted that, firstly, by reducing the hysteresis and eddy current losses in the magnetic core, the setting of the second air gap 121 can effectively improve the energy efficiency of the transformer, because the second air gap 121 divides the magnetic circuit, reduces the continuity of the magnetic flux, and thus reduces the unnecessary loss of energy; further, the introduction of the second air gap 121 also helps to avoid the magnetic saturation phenomenon that may occur under large AC signals or DC bias conditions, and the second air gap 121 can reduce the magnetic permeability, so that the magnetic core column 12 can still maintain a linear response under a larger current, thereby ensuring the stable operation of the device; further, compared with the traditional magnetic core column 12, this multi-segment second air gap 121 design not only reduces the loss, but also improves the magnetic permeability and saturation magnetic induction intensity, which has significant advantages in applications requiring higher electromagnetic performance and power density, and also provides the possibility of better control of inductance. By precisely adjusting the size and position of the air gap, the inductance value of the electromagnetic component can be precisely controlled, which is crucial for applications that require precise control of the electromagnetic response in the circuit.
[0026] In one embodiment, a plurality of annular spacers 212 are protruding from the outer side surface of the wire barrel 21 , and a winding area is formed between adjacent spacers 212 .
[0027] In this embodiment, it should be noted that the annular design of the isolation sheet 212 allows each winding area to be clearly defined, which helps to keep the coils neat and orderly during the winding process. Each area can be wound with coils independently, reducing the crossover and interference between different coils and improving the overall quality of the winding; at the same time, the existence of the isolation sheet 212 increases the area of the outer surface of the wire barrel 21, which helps to dissipate heat. When the transformer is running, the heat generated can be more effectively dissipated to the surrounding environment through the isolation sheet 212, reducing the temperature rise and further extending the service life of the transformer.
[0028] In one embodiment, a heat dissipation through hole 116 is opened on the yoke portion 11 , and the heat dissipation through hole 116 passes through the left core body 111 , the core column 12 and the right core body 112 in sequence.
[0029] In this embodiment, it should be noted that the formation of the heat dissipation through holes 116 provides a direct heat dissipation path. When the transformer is running, the generated heat can be quickly dissipated to the surrounding environment through these through holes, thereby effectively reducing the temperature rise of the transformer.
[0030] In one embodiment, an upper groove 117 is formed on the top surface of the magnetic core upper body 113 , and a lower groove 118 is formed on the bottom surface of the magnetic core lower body 114 .
[0031] In this embodiment, it should be noted that the upper slot 117 and the lower slot 118 increase the surface area of the magnetic core, which helps to dissipate heat to a certain extent. When the transformer is running, the generated heat can be dissipated to the surrounding environment through these slots, thereby reducing the temperature rise.
[0032] In one embodiment, both the upper groove 117 and the lower groove 118 are provided with a through opening 119 facing the skeleton structure 2 .
[0033] In this embodiment, it should be noted that the opening 119 provides an additional heat dissipation path. When the transformer is running, the skeleton structure 2 and the coils thereon will generate heat, which can be directly dissipated to the outside of the upper body 113 and the lower body of the magnetic core through the opening 119, thereby enhancing the heat dissipation performance of the transformer and helping to reduce the temperature rise.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
Claims
1. A transformer structure for reducing temperature rise, characterized in that: It includes a magnetic core structure and a skeleton structure; wherein, The magnetic core structure comprises a yoke portion and a magnetic core column, the yoke portion comprises a left magnetic core body located on the left, a right magnetic core body located on the right, an upper magnetic core body located on the upper side, and a lower magnetic core body located on the lower side, the left magnetic core body and the right magnetic core body are integrally connected to the magnetic core column, a first air gap extending horizontally is provided at the center of the left side surface of the left magnetic core body and the center of the right side surface of the right magnetic core body, and the first air gap is used to divide the left magnetic core body and the right magnetic core body into two parts, an upper part and an lower part; The skeleton structure includes a wire wrapping barrel located inside the magnetic yoke part and surrounding the magnetic core column, and the wire wrapping barrel is provided with a plurality of grid hollows.
2. The transformer structure for reducing temperature rise according to claim 1, characterized in that: A plurality of second air gaps are formed on the side surface of the magnetic core column along the center line direction.
3. The transformer structure for reducing temperature rise according to claim 1, characterized in that: A plurality of annular spacers are protruding from the outer side surface of the wire barrel, and a winding area is formed between adjacent spacers.
4. The transformer structure for reducing temperature rise according to claim 1, characterized in that: The yoke part is provided with a heat dissipation through hole, and the heat dissipation through hole passes through the left body of the magnetic core, the magnetic core column and the right body of the magnetic core in sequence.
5. The transformer structure for reducing temperature rise according to claim 1, characterized in that: An upper groove is formed on the top surface of the upper body of the magnetic core, and a lower groove is formed on the bottom surface of the lower body of the magnetic core.
6. The transformer structure for reducing temperature rise according to claim 5, characterized in that: The upper groove and the lower groove are both provided with openings facing the skeleton structure.