Transformer structure with high heat dissipation effect
By using irregularly shaped heat sinks and insulating sheet structures in transformers, the heat dissipation problem of high-power transformers has been solved, achieving efficient heat dissipation and miniaturization design, reducing costs and improving electrical safety.
Patent Information
- Application Number
- CN202423302388.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
High-power transformers suffer from heat dissipation difficulties, leading to increased temperature, which affects power density and increases production costs.
It adopts irregularly shaped heat sinks, with the concentrated heat absorption part passing through the inner hole of the coil and between the central column of the magnetic core. The heat is quickly conducted and dissipated through the heat dissipation part made of metal material. Combined with the insulating sheet and the supporting base, the heat dissipation effect and insulation are improved.
It improves the heat dissipation of transformers, enables miniaturization, reduces size and cost, and solves electromagnetic interference and radiation problems, thereby enhancing electrical safety and reliability.
Smart Images
Figure CN223857984U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field especially is related to a transformer structure of high heat dissipation effect. BACKGROUND
[0002] As the important equipment in power system, the main function of transformer is to change AC voltage through electromagnetic induction principle, realizes the transmission, distribution and use of electric energy. In the operation process of transformer, due to the heat generated by current through internal resistance, and the magnetic hysteresis and eddy current loss in the magnetic core, etc. It will cause the temperature of transformer to rise. Especially for high-power transformer, the common high-power transformer currently exists heat dissipation difficulty. For example, there is a serious overheating phenomenon between the coil inner hole and the magnetic core middle column, which restricts the improvement of transformer power density. The common solution method is to increase the size of the magnetic core to increase the heat dissipation area, but this not only increases the volume of the transformer product, but also increases the production cost of the transformer product. SUMMARY
[0003] The utility model discloses a kind of transformer structures of high heat dissipation effect, to overcome the deficiencies in prior art, to improve the heat dissipation effect of transformer, while also reduce the volume of transformer.
[0004] The utility model discloses a kind of transformer structures of high heat dissipation effect, to overcome the deficiencies in prior art, to improve the heat dissipation effect of transformer, while also reduce the volume of transformer.
[0005] A kind of transformer structure of high heat dissipation effect, including: coil assembly, magnetic core assembly and heat sink, the coil inner hole is formed on the coil assembly;The magnetic core middle column is provided on the magnetic core assembly, the magnetic core middle column is arranged in the coil inner hole;The heat sink includes profiled fin, the profiled fin includes concentrated heat absorption part and heat dissipation part, the concentrated heat absorption part is arranged in the coil inner hole, and the concentrated heat absorption part is located between the coil assembly and the magnetic core middle column, one end of the heat dissipation part is connected with the concentrated heat absorption part, and the other end of the heat dissipation part is bent and extended to the outside of the coil inner hole.
[0006] In one embodiment, the cross section of the concentrated heat absorption part is arc-shaped structure, so that the concentrated heat absorption part has first arc surface and second arc surface, the first arc surface is towards the inner side wall of the coil inner hole, and the second arc surface is towards the magnetic core middle column.
[0007] In one embodiment, the heat dissipation part includes heat dissipation enhancement end and bending connection end, the bending connection end is connected with the concentrated heat absorption part and the heat dissipation enhancement end respectively, and the width of the heat dissipation enhancement end and the width of the concentrated heat absorption part are greater than the bending connection end respectively.
[0008] In one embodiment, the profiled fin is metal heat dissipation fin.
[0009] In one of the embodiments, two of the shaped heat sinks are provided, the concentrated heat absorbing parts of the two shaped heat sinks are respectively arranged in the coil inner hole, and the two shaped heat sinks are oppositely arranged.
[0010] In one of the embodiments, the coil assembly comprises a plurality of wire cakes and a plurality of insulation sheets, and any one of the insulation sheets is located between two of the wire cakes.
[0011] In one of the embodiments, the magnetic core assembly comprises an upper magnetic core and a lower magnetic core, the upper magnetic core is provided with an upper magnetic core middle column, the lower magnetic core is provided with a lower magnetic core middle column, and the upper magnetic core middle column and the lower magnetic core middle column are respectively arranged in the coil inner hole.
[0012] In one of the embodiments, an upper limiting block is arranged around the periphery of the upper magnetic core middle column, and the upper limiting block is provided with a heat dissipation part avoiding area; the heat dissipation part avoiding area is used for avoiding the heat dissipation part, so that the heat dissipation part is exposed.
[0013] In one of the embodiments, a bearing base is further included, the magnetic core assembly is mounted on the bearing base, and the connecting end on the coil assembly penetrates through the bearing base.
[0014] In one of the embodiments, the bearing base is an insulating bearing base.
[0015] Compared with the prior art, the transformer structure with high heat dissipation effect has at least the following advantages:
[0016] The transformer structure with high heat dissipation effect of the utility model discloses a coil assembly, a magnetic core assembly and a heat dissipation piece, specifically a shaped heat sink is arranged, the concentrated heat absorbing part on the shaped heat sink is arranged in the coil inner hole and located between the coil assembly and the magnetic core middle column, so that the heat of the coil assembly and the magnetic core middle column can be quickly absorbed and concentrated on the concentrated heat absorbing part, then the heat is quickly conducted to the heat dissipation part by the concentrated heat absorbing part, and the heat is quickly dissipated by the heat dissipation part. In this way, not only the heat dissipation effect of the transformer can be improved, but also the volume of the transformer can be reduced, the miniaturization design of the transformer can be realized, and the cost can be further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced.
[0018] Figure 1 It is a structural schematic view of the transformer structure with high heat dissipation effect in an embodiment of the utility model;
[0019] Figure 2 It is a structural schematic view of the transformer structure with high heat dissipation effect in an embodiment of the utility model;Figure 1 The first explosion structure schematic view of the transformer structure with high heat dissipation effect in the application;
[0020] Figure 3 The transformer structure with high heat dissipation effect in the application; Figure 1 The second explosion structure schematic view of the transformer structure with high heat dissipation effect in the application;
[0021] Figure 4 The transformer structure with high heat dissipation effect in the application; Figure 1 The structure schematic view of the special-shaped heat sink of the transformer structure with high heat dissipation effect in the application;
[0022] Figure 5 The transformer structure with high heat dissipation effect in the application; Figure 1 The structure schematic view of the heat dissipation piece of the transformer structure with high heat dissipation effect in the application; DETAILED DESCRIPTION
[0023] In order to facilitate the understanding of the application, the application will be described more fully below with reference to the accompanying drawings.
[0024] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a transformer structure with high heat dissipation effect, comprising: a coil assembly 100, a magnetic core assembly 200 and a heat dissipation piece 300, a coil inner hole is formed on the coil assembly 100; The magnetic core assembly 200 is provided with a magnetic core column, and the magnetic core column is arranged in the coil inner hole; The heat dissipation piece 300 comprises a special-shaped heat sink 310, the special-shaped heat sink 310 comprises a concentrated heat absorbing part 311 and a heat dissipation part 312, the concentrated heat absorbing part 311 is arranged in the coil inner hole, and the concentrated heat absorbing part 311 is located between the coil assembly 100 and the magnetic core column, one end of the heat dissipation part 312 is connected with the concentrated heat absorbing part 311, and the other end of the heat dissipation part 312 is bent and extended to the outside of the coil inner hole.
[0025] It should be noted that by setting the heat dissipation piece 300 on the transformer, the heat dissipation effect of the transformer can be improved. Specifically, by setting the special-shaped heat dissipation fin 310 and making the concentrated heat absorption part 311 on the special-shaped heat dissipation fin 310 pass through the coil inner hole and be located between the coil assembly 100 and the magnetic core middle column, the heat of the coil assembly 100 and the magnetic core middle column can be quickly absorbed and concentrated on the concentrated heat absorption part 311, then the heat is quickly conducted to the heat dissipation part 312 by the concentrated heat absorption part 311, and the heat is quickly dissipated by the heat dissipation part 312, effectively reducing the temperature and also reducing the magnetic core loss, greatly improving the power density of the transformer. In this way, not only the heat dissipation effect of the transformer can be improved, but also the volume of the transformer can be reduced, the miniaturization design of the transformer can be realized, and the cost can be further reduced. For example, the conventional way to solve the problem of the coil inner hole and the magnetic core middle column is to increase the size of the magnetic core, which will increase the volume of the entire transformer product, and then directly cause the increase of the raw material consumption of the transformer by 10-20%. By adding the special-shaped heat dissipation fin 310 on the transformer, the volume of the transformer with the same power can be reduced by more than 10%, so that the miniaturization design of the transformer can be realized
[0026] In an embodiment, the cross section of the concentrated heat absorption part 311 is arc-shaped, so that the concentrated heat absorption part 311 has a first arc surface 311a and a second arc surface 311b. The first arc surface 311a faces the inner side wall of the coil inner hole, and the second arc surface 311b faces the magnetic core middle column. That is, the concentrated heat absorption part 311 is designed to match the actual shape of the coil inner hole and the magnetic core middle column. In this embodiment, the side walls of the coil inner hole and the magnetic core middle column are arc-shaped, so the first arc surface 311a and the second arc surface 311b of the corresponding concentrated heat absorption part 311 are also arc-shaped. Therefore, not only is the installation of the heat dissipation piece 300 facilitated, but also the contact area between the concentrated heat absorption part 311 and the side walls of the coil inner hole and the magnetic core middle column is increased, so as to improve the heat conduction effect and further improve the heat dissipation effect.
[0027] In an embodiment, the heat dissipation part 312 includes a heat dissipation enhancement end 312a and a bent connection end 312b. The bent connection end 312b is connected to the concentrated heat absorption part 311 and the heat dissipation enhancement end 312a, respectively. The width of the heat dissipation enhancement end 312a and the width of the concentrated heat absorption part 311 are greater than the width of the bent connection end 312b. The width of the bent connection end 312b is relatively small compared to the size of the heat dissipation enhancement end 312a and the concentrated heat absorption part 311, so that the bending operation of the heat dissipation part 312 is facilitated. At the same time, increasing the area of the heat dissipation enhancement end 312a can further improve the heat dissipation speed, and further improve the heat dissipation effect of the transformer.
[0028] Preferably, the special-shaped heat sink 310 is a metal heat sink. The metal material has high thermal conductivity, so that the heat between the coil assembly 100 and the magnetic core column can be quickly conducted to the concentrated heat absorbing part 311, and then quickly dissipated through the heat dissipation part 312, thereby realizing the rapid heat dissipation of the transformer coil inner hole and improving the heat dissipation effect. In this embodiment, the metal heat sink is preferably a copper heat sink, thereby achieving high heat dissipation effect. At the same time, using a copper heat sink can also effectively solve the magnetic interference and radiation problems caused by the transformer in the power module, thereby facilitating the reduction of the power module EMC (Electromagnetic Compatibility).
[0029] In an embodiment, two special-shaped heat sinks 310 are provided, the concentrated heat absorbing parts 311 of the two special-shaped heat sinks 310 are respectively arranged in the coil inner hole, and the two special-shaped heat sinks 310 are oppositely arranged. That is, the special-shaped heat sink 310 adopts a half structure instead of a whole structure, and is used in combination with two special-shaped heat sinks 310, so that the concentrated heat absorbing part 311 on the special-shaped heat sink 310 can be filled in a larger area between the coil assembly 100 and the magnetic core column, thereby not only facilitating the processing of the special-shaped heat sink 310, but also facilitating the installation of the special-shaped heat sink 310 into the coil inner hole (if the special-shaped heat sink 310 adopts a whole structure, the concentrated heat absorbing part 311 is in a cylindrical shape, and the cylindrical concentrated heat absorbing part 311 is prone to size deviation due to processing errors during processing. When the size deviation is large, the concentrated heat absorbing part 311 cannot be installed inside the coil, or the magnetic core column cannot be installed in the coil inner hole, but the special-shaped heat sink 310 adopting a half structure combination does not have this problem, and has lower size precision requirements.
[0030] In an embodiment, the coil assembly 100 includes a plurality of wire cakes 110 and a plurality of insulating sheets 120, and any one insulating sheet 120 is located between two wire cakes 110. The insulating sheet 120 plays an insulating role, thereby ensuring the electrical safety and reliability of the transformer, and also providing certain mechanical support and protection for the wire cake 110. For example, the insulating sheet 120 can be made of polyimide film or silicone rubber, and is preferably made of silicone rubber. Silicone rubber has high temperature resistance, corrosion resistance and other characteristics, can maintain stable performance in harsh environments, and has good mechanical properties, can withstand certain pressure and impact, and thus can improve the performance of the transformer.
[0031] In an embodiment, the magnetic core assembly 200 comprises an upper magnetic core 210 and a lower magnetic core 220, the upper magnetic core 210 is provided with an upper magnetic core middle column 211, the lower magnetic core 220 is provided with a lower magnetic core middle column 221, and the upper magnetic core middle column 211 and the lower magnetic core middle column 221 are respectively arranged in the coil inner hole. In this way, the upper magnetic core middle column 211 and the lower magnetic core middle column 221 can be conveniently arranged in the coil inner hole.
[0032] In an embodiment, an upper limiting block is arranged around the periphery of the upper magnetic core middle column 211, and the upper limiting block is provided with a heat dissipation part avoiding area 211a. The heat dissipation part avoiding area 211a is used to avoid the heat dissipation part 312, so that the heat dissipation part 312 is exposed. In this way, the contact area of the heat dissipation part 312 with the outside can be increased, so that the heat dissipation effect can be further improved.
[0033] In an embodiment, the transformer structure with high heat dissipation effect further comprises a bearing base 400, the magnetic core assembly 200 is mounted on the bearing base 400, and the connecting end on the coil assembly 100 penetrates through the bearing base 400. The magnetic core assembly 200 and the coil assembly 100 are carried by the bearing base 400, so as to facilitate the installation of the transformer. Preferably, the bearing base 400 is an insulating bearing base 400, and the insulating bearing base 400 is a plastic base, so that the insulation effect of the transformer can be improved, and the safety of the transformer can be improved.
[0034] Please refer to Figure 5 In an embodiment, in order to further improve the heat dissipation effect of the transformer, the special-shaped heat dissipation fin 310 is further provided with an enhanced heat dissipation layer 313, one end of the enhanced heat dissipation layer 313 is connected with the heat dissipation part 312, and the other end of the enhanced heat dissipation layer 313 extends above the heat dissipation part 312 and is arranged in spaced relation with the heat dissipation part 312. In this way, the contact area of the special-shaped heat dissipation fin 310 with the outside can be further increased, so that the heat dissipation effect can be further improved. In this embodiment, in order to further improve the heat dissipation speed, the cross section of the enhanced heat dissipation layer 313 is wave-shaped, so that the heat dissipation area can be further increased and the heat dissipation speed can be improved. For example, the enhanced heat dissipation layer 313 can be arranged on the heat dissipation part 312 by welding.
[0035] Please refer to Figure 5 In an embodiment, in order to avoid the heat of the heat dissipation part 312 on the coil assembly 100 from continuing to conduct to the coil assembly 100, the heat dissipation part 312 is provided with a heat insulation layer 314 on the side surface close to the coil assembly 100. The heat insulation layer 314 avoids the heat from continuing to conduct to the coil assembly 100, so that the heat dissipation effect can be further improved. In this embodiment, the heat insulation layer 314 can be a heat insulation material such as epoxy resin, polyurethane foam, polyester fiber felt and aerogel felt.
[0036] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.
Claims
1. A transformer structure with high heat dissipation effect, characterized in that, The application relates to a coil assembly, a magnetic core assembly and a heat dissipation piece. The coil assembly is provided with a coil inner hole; the magnetic core assembly is provided with a magnetic core middle column which is arranged in the coil inner hole; and the heat dissipation piece comprises a special-shaped heat dissipation fin which comprises a concentrated heat absorbing part and a heat dissipation part. The concentrated heat absorbing part is arranged in the coil inner hole and located between the coil assembly and the magnetic core middle column; one end of the heat dissipation part is connected with the concentrated heat absorbing part, and the other end of the heat dissipation part is bent and extended to the outside of the coil inner hole. The cross section of the concentrated heat absorbing part is in an arc structure, so that the concentrated heat absorbing part has a first arc surface and a second arc surface; the first arc surface faces the inner side wall of the coil inner hole, and the second arc surface faces the magnetic core middle column.
2. The transformer structure with high heat dissipation effect according to claim 1, characterized in that, The heat dissipation part comprises a heat dissipation enhancement end and a bent connection end; the bent connection end is connected with the concentrated heat absorbing part and the heat dissipation enhancement end respectively; the width of the heat dissipation enhancement end and the width of the concentrated heat absorbing part are greater than the width of the bent connection end.
3. The transformer structure with high heat dissipation effect according to claim 1, characterized in that, The special-shaped heat dissipation fin is a metal heat dissipation fin.
4. The high heat dissipation effect transformer structure according to claim 1, characterized in that, Two special-shaped heat dissipation fins are arranged; the concentrated heat absorbing parts of the two special-shaped heat dissipation fins are arranged in the coil inner hole respectively, and the two special-shaped heat dissipation fins are arranged oppositely.
5. The high heat dissipation effect transformer structure according to any one of claims 1-4, characterized in that, The coil assembly comprises a plurality of wire cakes and a plurality of insulating sheets; and any one of the insulating sheets is located between two wire cakes.
6. The high heat dissipation effect transformer structure according to any one of claims 1-4, characterized in that, The magnetic core assembly comprises an upper magnetic core and a lower magnetic core; the upper magnetic core is provided with an upper magnetic core middle column; the lower magnetic core is provided with a lower magnetic core middle column; and the upper magnetic core middle column and the lower magnetic core middle column are arranged in the coil inner hole.
7. The high heat dissipating transformer structure according to any one of claims 1-4, wherein, An upper limiting block is arranged around the periphery of the upper magnetic core middle column; the upper limiting block is provided with a heat dissipation part avoiding area; the heat dissipation part avoiding area is used for avoiding the heat dissipation part, so that the heat dissipation part is exposed.
8. The high heat dissipation effect transformer structure according to claim 7, characterized in that, The application further relates to a bearing base; the magnetic core assembly is mounted on the bearing base; and a connecting end on the coil assembly passes through the bearing base.
9. The high heat dissipating transformer structure according to any one of claims 1-4, wherein, The bearing base is an insulating bearing base.
10. The high heat dissipation effect transformer structure according to claim 9, characterized in that,