A transformer with high heat dissipation

Abstract

The utility model discloses a kind of high heat dissipation's transformers, it is related to transformer technical field, including framework, framework is provided with magnetic core, coil is wound in magnetic core, framework is also provided with PIN foot, coil and PIN foot electrically connected;It further includes fin, fin is attached to the surface of coil, and coil and fin between have heat-conducting glue;Between coil and magnetic core, fin is set, and heat-conducting glue made of heat-conducting silicone is coated on the surface of fin or coil, heat-conducting silicone transmits the heat of coil to fin, fin again passes through heat-conducting sheet one and heat-conducting sheet two and transmits heat to heat-dissipating shell, can avoid internal heat generation accumulation cannot be exported, heat transfer from fin to heat-dissipating shell, can realize the rapid export and outward dissipation of coil heat, improve the heat dissipation performance of transformer, to prevent the damage of transformer caused by the temperature of coil being too high, reduce the loss of coil, improve the conversion efficiency and reliability of transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer with high heat dissipation. Background Technology

[0002] With the advancement of science and technology and the development of electronic technology, more and more electronic devices need to use transformer components. LLC transformers, with their ability to operate under no-load conditions and reflect the load weight through resonant tank current, have advantages that ordinary series resonant transformers and parallel resonant transformers cannot match, and are therefore widely used.

[0003] However, existing LLC transformers still have the following drawbacks in practical applications: Disadvantage 1: The transformer windings are wrapped with insulating tape. The insulating tape has low thermal conductivity, which seriously hinders the dissipation of heat from the windings, causing the coil operating temperature to rise. This, in turn, increases coil losses such as copper losses and significantly reduces the transformer conversion efficiency.

[0004] Disadvantage 2: High temperature will accelerate the aging of transformer insulation materials, causing their insulation strength to gradually decrease, significantly increasing the risk of internal short circuits and other faults in the transformer, and seriously affecting the reliability and service life of the power supply system.

[0005] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a transformer with high heat dissipation, including a frame, a magnetic core disposed on the frame, a coil wound inside the magnetic core, and a pin on the frame, wherein the coil is electrically connected to the pin; It also includes a heat sink, which is attached to the surface of the coil, and there is thermally conductive adhesive between the coil and the heat sink.

[0008] As a further embodiment of this utility model: the heat sink is sandwiched between the coil and the magnetic core, and the heat sink extends out with a heat-conducting part, which extends to the outside of the magnetic core and the coil.

[0009] As a further embodiment of this utility model: a heat dissipation shell is provided on the outside of the magnetic core, and the heat-conducting part is connected to the heat dissipation shell.

[0010] As a further embodiment of this utility model: the heat dissipation shell includes a back shell, an upper shell, a side shell and a lower shell, forming a covering and surrounding of one side of the magnetic core, and the upper shell and the lower shell are respectively attached to the top surface and the bottom surface of the magnetic core; The heat dissipation shell is provided in two parts, and the two heat dissipation shells are arranged in a mirror image on both sides of the magnetic core.

[0011] As a further embodiment of this utility model: there is a heat dissipation gap between the side shell and the magnetic core and the coil, and the heat-conducting part includes a heat-conducting sheet one and a heat-conducting sheet two extending from both sides of the heat sink, respectively. The heat-conducting sheet one and the heat-conducting sheet two extend into the heat dissipation gap and are fixedly connected to the heat sink shell.

[0012] As a further embodiment of this utility model: the first heat-conducting sheet has a horizontal plane, the second heat-conducting sheet has a vertical plane, the horizontal plane and the vertical plane are provided with a first fixing hole, and the upper shell and the side shell are provided with a second fixing hole corresponding to the first fixing hole.

[0013] As a further embodiment of this utility model: a core post is provided on the magnetic core, and the coil is wound around the outside of the core post; The heat sink has mounting holes, and the core column is inserted into the mounting holes.

[0014] Compared with the prior art, the beneficial effects of this technical solution are as follows: a heat sink is set between the coil and the magnetic core, and a thermally conductive adhesive made of thermally conductive silicone is coated on the surface of the heat sink or the coil. The thermally conductive silicone transfers the heat of the coil to the heat sink, and the heat sink then transfers the heat to the heat dissipation shell through thermally conductive plate one and thermally conductive plate two. This can prevent the internal heat from accumulating and being unable to dissipate. The heat transfer from the heat sink to the heat dissipation shell can realize the rapid dissipation and outward dissipation of the coil's heat, improve the heat dissipation performance of the transformer, thereby preventing the transformer from being damaged due to excessive coil temperature, reducing coil losses, and improving the transformer's conversion efficiency and reliability.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the structure of the heat sink of this utility model; Figure 6 This is a schematic diagram of the structure of the heat dissipation shell of this utility model; The corresponding labels in the attached diagram are explained as follows: 1. Frame; 11. Pin; 2. Magnetic core; 21. Core post; 3. Coil; 4. Heat sink; 41. Thermal conductive part; 42. Thermal conductive plate one; 421. Horizontal plane; 43. Thermal conductive plate two; 431. Vertical plane; 44. Fixing hole one; 45. Assembly hole; 5. Heat dissipation shell; 51. Back shell; 52. Top shell; 53. Side shell; 54. Bottom shell; 55. Fixing hole two; 6. Heat dissipation gap. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6 A transformer with high heat dissipation includes a frame 1, on which a magnetic core 2 is disposed, and a coil 3 is wound inside the magnetic core 2. The frame is also provided with a pin 11, and the coil 3 is electrically connected to the pin 11. It also includes a heat sink 4, which is attached to the surface of the coil 3, and there is thermally conductive adhesive between the coil 3 and the heat sink 4.

[0020] Specifically, a heat sink 4 is attached to the surface of coil 3 to increase the heat dissipation area. Thermally conductive adhesive (not shown in the figure) made of thermally conductive silicone is applied to the surface of coil 3 or heat sink 4. This not only transfers heat, allowing the heat in coil 3 to be transferred to heat sink 4, preventing the heat from accumulating due to poor heat dissipation, but also ensures the insulation between coil 3 and heat sink 4. This enables rapid heat dissipation from the coil, improves the heat dissipation performance of the transformer, prevents the transformer from being damaged due to excessive temperature of coil 3, reduces coil 2 losses, and improves the conversion efficiency and reliability of the transformer.

[0021] Based on the above embodiments, it is further proposed that the heat sink 4 is sandwiched between the coil 3 and the magnetic core 2, and the heat sink 4 extends out with a heat-conducting part 41, which extends to the outside of the magnetic core 2 and the coil 3.

[0022] Specifically, the heat sink 4 is fixed by being sandwiched between the coil 3 and the magnetic core 2, which allows the heat sink 4 to contact both the coil 3 and the magnetic core 2 and absorb heat. After the heat sink 4 absorbs the dissipated heat, it extends to the heat-conducting part 41 in the external environment of the magnetic core 2 and the coil 3, which can dissipate the heat to the external space, thereby improving the heat conversion efficiency of the heat sink 4 and improving the heat dissipation effect on the transformer.

[0023] Based on the above embodiments, it is further proposed that the magnetic core 2 is provided with a heat dissipation shell 5, and the heat conduction part 41 is connected to the heat dissipation shell 5.

[0024] Specifically, the addition of the heat dissipation shell 5 allows the heat-conducting part 41 to transfer the heat from the coil 3 and the magnetic core 2 to the entire heat dissipation shell 5. The larger surface area of ​​the heat dissipation shell 5 can increase the speed of heat dissipation to the outside, thereby further improving the heat dissipation efficiency. At the same time, the heat dissipation shell 5 also has a protective function, reducing the impact of the external environment on the magnetic core 2 and the coil 3.

[0025] Both the heat sink 4 and the heat sink housing 5 are made of aluminum.

[0026] Based on the above embodiments, it is further proposed that the heat dissipation shell 5 includes a back shell 51, an upper shell 52, a side shell 53 and a lower shell 54, forming a covering and surrounding of one side of the magnetic core 2, and the upper shell 52 and the lower shell 54 are respectively attached to the top surface and the bottom surface of the magnetic core 2. There are two heat dissipation shells 5, and the two heat dissipation shells 5 are arranged in a mirror image on both sides of the magnetic core 2.

[0027] Specifically, the heat dissipation shell 5 is formed by stamping and shaping, forming a back shell 51, an upper shell 52, a side shell 53, and a lower shell 54. When assembling the two heat dissipation shells 5, the two heat dissipation shells 5 are respectively inserted from both sides of the magnetic core 2, so that the upper shell 52 and the lower shell 54 fit against the upper and lower end faces of the magnetic core 2. That is, combined with the back shell 51 and the side shell 53, one heat dissipation shell 5 can cover one side of the magnetic core 2 in five directions. Therefore, after the two heat dissipation shells 5 are assembled, they form a complete coverage of the magnetic core 2. Through the connection with the heat sink 4, the heat dissipation shell 5 can be fixed to the outside of the magnetic core 2.

[0028] Based on the above embodiments, it is further proposed that the side shell 53 has a heat dissipation gap 6 between the magnetic core 2 and the coil 3, and the heat conduction part 41 includes a heat conduction sheet 42 and a heat conduction sheet 43 extending from both sides of the heat sink 4, respectively. The heat conduction sheet 42 and the heat conduction sheet 43 extend into the heat dissipation gap 6 and are fixedly connected to the heat sink shell 5.

[0029] Specifically, the formation of the heat dissipation gap 6 creates an airflow channel between the heat dissipation shell 5 and the magnetic core 2, allowing natural air convection to carry away the surrounding heat, thus assisting the heat exchange of the heat dissipation shell 5. It also prevents the heat dissipation shell 5 from being fully in contact with the magnetic core 2, which would lead to heat accumulation. Meanwhile, the heat-conducting plates 42 and 43 extending from both sides of the heat sink 4 enter the heat dissipation gap 6 and are fixed to the heat dissipation shell 5, thereby fixing the heat dissipation shell 5 to the outside of the magnetic core 2.

[0030] Based on the above embodiments, it is further proposed that the heat-conducting sheet 42 is formed with a horizontal plane 421, the heat-conducting sheet 43 is formed with a vertical plane 431, the horizontal plane 421 and the vertical plane 431 are provided with fixing holes 44, and the upper shell 52 and the side shell 53 are provided with fixing holes 55 corresponding to fixing holes 44.

[0031] Specifically, the horizontal plane 421 formed by heat-conducting plate 42 is attached to the upper shell 52, and the vertical plane 431 formed by heat-conducting plate 43 is attached to the side shell 53, ensuring the efficiency of heat transfer. The horizontal plane 421 and the vertical plane 431 are fixedly connected to the upper shell 52 and the side shell 53 by means of fixing holes 44 and 55, such as rivets or bolts (not shown in the figure). The horizontal plane 421 restricts the horizontal movement between the heat sink 4 and the heat sink shell 5, and the vertical plane 431 restricts the vertical movement between the heat sink 4 and the heat sink shell 5, which can enhance the stability of the heat sink shell 5, prevent loosening and falling, and enhance the overall structural stability of the transformer.

[0032] Based on the above embodiments, it is further proposed that the magnetic core 2 is provided with a core post 21, and the coil 3 is wound around the outside of the core post 21. Preferably, as follows: Figure 2 As shown, the magnetic core 2 has two parts, upper and lower. When the two magnetic cores 2 are assembled, the core posts 21 on opposite sides are connected, and the coil 3 is wound around the outside of the core posts 21. The heat sink 4 has an assembly hole 45, and the core post 21 is inserted into the assembly hole 45.

[0033] Specifically, during the assembly process, the heat sink 4 can be placed between the coil 3 and the magnetic core 2. Then, the core post 21 of the magnetic core 2 passes through the assembly hole 45 of the heat sink 4 while passing through the coil 3. With the fixed connection (such as adhesive bonding) between the two magnetic cores 2, the heat sink 4 is fastened between the magnetic core 2 and the coil 3. The direct insertion of the core post 21 into the assembly hole 45 can directly restrict the position of the heat sink 4.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high heat dissipating transformer, characterized by, Includes a frame (1), on which a magnetic core (2) is provided, and a coil (3) is wound inside the magnetic core (2). The frame is also provided with a pin (11), and the coil (3) is electrically connected to the pin (11). It also includes a heat sink (4), which is attached to the surface of the coil (3), and there is thermally conductive adhesive between the coil (3) and the heat sink (4).

2. The transformer of claim 1, wherein The heat sink (4) is sandwiched between the coil (3) and the magnetic core (2), and the heat sink (4) extends out with a heat-conducting part (41), which extends to the outside of the magnetic core (2) and the coil (3).

3. The transformer of claim 2, wherein The magnetic core (2) is provided with a heat dissipation shell (5) on the outside, and the heat conduction part (41) is connected to the heat dissipation shell (5).

4. The transformer of claim 3, wherein The heat dissipation shell (5) includes a back shell (51), an upper shell (52), a side shell (53) and a lower shell (54), forming a covering and surrounding of one side of the magnetic core (2), and the upper shell (52) and the lower shell (54) are respectively attached to the top and bottom surfaces of the magnetic core (2); There are two heat dissipation shells (5), and the two heat dissipation shells (5) are arranged in a mirror image on both sides of the magnetic core (2).

5. The transformer of claim 4, wherein The side shell (53) has a heat dissipation gap (6) between the magnetic core (2) and the coil (3). The heat-conducting part (41) includes a heat-conducting plate one (42) and a heat-conducting plate two (43) extending from both sides of the heat sink (4). The heat-conducting plate one (42) and the heat-conducting plate two (43) extend into the heat dissipation gap (6) and are fixedly connected to the heat dissipation shell (5).

6. The transformer of claim 5, wherein The heat-conducting sheet one (42) has a horizontal plane (421), the heat-conducting sheet two (43) has a vertical plane (431), a fixing hole one (44) is provided on the horizontal plane (421) and the vertical plane (431), and a fixing hole two (55) corresponding to the fixing hole one (44) is provided on the upper shell (52) and the side shell (53).

7. The high heat dissipating transformer of claim 6, wherein, The magnetic core (2) is provided with a core post (21), and the coil (3) is wound around the outside of the core post (21); The heat sink (4) has an assembly hole (45) and the core post (21) is inserted into the assembly hole (45).

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