TW202120882A - Transformer with built-in heat dissipation channel including a heat dissipation plate, a wire winding, a copper sheet winding and an iron core set - Google Patents

Abstract

The invention is a transformer with a built-in heat dissipation channel, which includes a heat dissipation plate, a wire-winding, a copper sheet winding, and an iron core set. The wire-winding is mainly provided with a plurality of coils on a bobbin. The copper sheet winding has a plurality of copper sheets. The copper sheets are arranged on the bobbin, and the copper sheets and each set of the coils are arranged alternately. At least one end of each copper sheet is formed with a thermal contact portion for being fixed to the heat dissipation plate and forming a thermal contact. The iron core set includes two iron cores, which are oppositely arranged on the bobbin and correspond to the coils and copper sheets on the bobbin. With the aforementioned design, at least one winding of the transformer is made of copper sheets and forms thermal contact with the heat dissipation plate to form a heat dissipation channel, thereby improving the heat dissipation efficiency of the transformer.

Description

Transformer with built-in heat dissipation channel

The present invention is a transformer, especially a transformer with a built-in forced heat dissipation channel to improve heat dissipation efficiency.

The transformer plays the role of voltage conversion in the power supply. In the process of power conversion, heat is often generated due to loss. The line loss in the loss is more difficult to effectively dissipate the heat, which causes the overall efficiency to decrease; the traditional The method may be to increase the size of the transformer, and use thicker copper wires or copper sheets to help dissipate heat. However, although the size of the current power supply remains the same, the power density continues to increase. The size of the transformer is limited due to factors such as specifications and cannot be increased. Therefore, other methods must be used to help dissipate heat so that the performance will not be reduced due to heat.

Traditional transformers are mostly made of multiple sets of turns. Because the turns themselves are insulated and the insulation material has poor thermal conductivity, it is easy to cause heat accumulation, which may affect efficiency; or The copper sheets are matched to form the windings of the transformer, and the high conductivity of the copper sheets increases the current resistance, thereby reducing heat generation.

However, the aforementioned two types of transformers still cannot reduce heat generation. At present, heat is conducted to a printed circuit board (PCB) or other places by means of dispensing thermal glue, and the heat dissipation efficiency cannot be effectively improved due to limited effects.

It can be seen from the above that the existing transformer still has the problem of heating and affecting the overall efficiency. Therefore, further review and a feasible solution are needed.

Therefore, the main purpose of the present invention is to provide a transformer with a built-in heat dissipation channel. At least one winding of the transformer is composed of copper sheets and combined with a heat dissipation plate to form thermal contact, thereby providing a heat dissipation channel for the windings to effectively Solve the problem that heat affects efficiency.

The technical means adopted to achieve the above purpose include the aforementioned transformers with built-in heat dissipation channels: A heat sink; A winding winding is mainly composed of multiple sets of coils on a winding frame; A copper sheet winding with a plurality of copper sheets, each copper sheet is arranged on the winding frame and arranged alternately with each group of coils, and at least one end of each copper sheet is formed with a thermal contact portion for fixing to the heat sink and forming Thermal contact An iron core group, including two iron cores, which are arranged on the winding frame oppositely and correspond to the coils and copper sheets thereon;

With the above design, at least one winding of the transformer is composed of copper sheets, and each copper sheet is connected to the heat sink by a thermal contact portion provided at at least one end, and forms thermal contact with the heat sink. In this case, the copper sheet itself is the original winding. It has better heat dissipation capacity, and forms a heat dissipation channel by directly contacting the heat dissipation plate, which can further greatly improve the heat dissipation efficiency of the transformer, thereby effectively solving the problem that heat affects the overall efficiency of the transformer.

The following describes the technical means adopted by the present invention to achieve the intended purpose of the invention in conjunction with the drawings and the preferred embodiments of the present invention.

For a preferred embodiment of the present invention, please refer to FIG. 1 and FIG. 2, which includes a winding winding 10, a copper sheet winding 20, an iron core group 30 and a heat sink 40; among them,

The winding winding 10 is mainly provided with a plurality of sets of coils 12 on a winding frame 11, the copper sheet winding 20 has a plurality of copper sheets 21, and each copper sheet 21 is arranged on the winding frame 11 and is connected to each set of coils 12 Arranged alternately, at least one end of each copper sheet 21 is formed with a thermal contact portion 210 for fixing to the heat sink 40 and forming thermal contact; the core set 30 includes two cores 31, 32, which are oppositely arranged on the winding On the frame 11 and corresponding to the coil 12 and the copper sheet 21 thereon.

The heat sink 40 is a flat plate made of thermally conductive metal. In this embodiment, it is made of aluminum sheet. An insulating layer 41 is formed on the surface of the heat dissipating plate 40 that is in thermal contact with the copper sheet 21 to ensure that each copper sheet 21 is in thermal contact with the surface of the heat dissipating sheet 40 without conduction or short circuit.

Please refer to FIGS. 2 and 3, the winding frame 11 includes a plurality of partitions 13 arranged in parallel and a hollow sleeve 14 for connecting adjacent partitions 13, the partitions 13 are generally ring-shaped , That is, a through groove 130 is formed in the center. In this embodiment, the partition 13 and the through groove 130 are both rectangular, and the sleeve 14 is also hollow, and its shape matches the through groove 130 of the partition 13. In addition, two adjacent partitions 13 and the sleeve 14 between them jointly form a winding space for winding the aforementioned coils 12 respectively. Please refer to FIG. 3, each partition 13 itself is formed with a hollow interlayer 131 for each of the aforementioned copper sheets 21 to penetrate therebetween.

Please refer to Figures 2 and 4, each copper sheet 21 of the copper sheet winding 20 is formed by bending a thin copper sheet of a specific shape. It must be noted that the copper sheet 21 of the copper sheet winding 20 is divided by copper In addition to the material structure, it can also be composed of other conductive metal sheets. Each copper sheet 21 includes two ring portions 211 respectively. As shown in FIG. 5, the shape of the ring portion 211 is matched with the partition 13 of the winding frame 11 and can be inserted into the interlayer 131 of the partition 13 correspondingly. A gap is formed at the upper end of the ring portion 211. As shown in FIG. 6, the ring portion 211 extends upward along the two ends of the gap to form a saddle portion 212. The saddle portion 212 is connected to the two ends of the other ring portion 211 respectively. A through hole 213 is formed on the saddle 212 for power supply connection.

The bottom end of the ring portion 211 extends in a horizontal direction to form the thermal contact portion 210, so that the two ring portions 211 of the copper sheet 21 are joined to the heat dissipation plate 40 by using the thermal contact portion 210 at the bottom end to form thermal contact therewith. The aforementioned copper sheet 21 forms the thermal contact portion 210 at the bottom end of at least one ring portion 211. In this embodiment, the copper sheet 21 forms the thermal contact portion 210 at the bottom ends of its two ring portions 211; the copper sheet 21 The thermal contact portion 210 and the heat sink 40 can be combined by screwing, welding or other feasible bonding means. In this embodiment, the thermal contact portion 210 of the copper sheet 21 is fixed to the heat sink 40 by welding .

As shown in FIG. 7, it is disclosed that each copper sheet 21 of the copper sheet winding 20 is respectively disposed in the interlayer 131 of each separator 13 of the bobbin 11, and is connected to the heat sink 40 through the thermal contact portion 210 at the bottom end. The combination of forms of thermal contact. Wherein, the winding frame 11 is located on the winding space formed between the adjacent partitions 13 and the sleeve 14 therebetween, and the coils 12 are respectively wound.

Still referring to Figure 1, the two cores 31, 32 of the core set 30 can be EE-shaped or EI-shaped. In this embodiment, the two cores 31, 32 are opposite EE-shaped, and the two cores 31 The ends penetrate relatively and correspond to the coil 12 and the copper sheet winding 20 on the bobbin 11.

As mentioned in the previous disclosure, each copper sheet 21 of the copper sheet winding 20 is connected with the saddle 212 for power supply. To ensure the connection stability of the saddle 212, please cooperate as shown in FIG. 2. The copper sheet winding 20 further includes Two fixed pads 22, the fixed pad 22 is E-shaped and has a number of parallel and equidistantly arranged cross arms 220, the number of which matches the number of copper sheets 21 of the copper sheet winding 20, and a fixing hole is formed on each cross arm 220 221. The shape of the cross arm 220 matches the shape of the saddle 212 of the copper sheet 21. As a result, as shown in FIGS. 1 and 8, the fixing pad 22 has its cross arms 220 inserted into the saddle 212 of each copper sheet 21 respectively, and the fixing holes 221 on each cross arm 220 correspond to the perforations on the saddle 212. 213. When the copper sheets 21 of the copper sheet winding 20 are electrically connected by screwing, the through holes 213 on the saddle portion 212 cooperate with the fixing holes 221 on the cross arms 220 of the fixing pad 23 to provide screwing, which can ensure The joint is firm.

Please refer to FIG. 9, which discloses a perspective view of another preferred embodiment of the present invention. In order to further improve the heat dissipation efficiency of the transformer, the present invention provides heat dissipation measures for the iron core group 30, which are mainly located on the heat dissipation plate 10 next to the iron core group 30 Two radiating fins 50 are provided at the position of, and the radiating fin 50 includes a vertical portion and a horizontal portion extending from the bottom of the vertical portion toward the horizontal direction, wherein, as shown in FIG. 10, the vertical portion is closely attached to the core assembly The outer walls of the iron cores 31 and 32 of 30 are used to form thermal contact, and the horizontal part thereof is combined with the heat dissipation plate 40 to form thermal contact. The joining method can be fixed by welding or thermally conductive glue.

The specific structure of each embodiment of the present invention can be understood from the above description. It is mainly that at least one winding of the transformer is composed of copper sheets, and each copper sheet is connected to the heat sink 40 with a thermal contact portion provided at at least one end. Make a thermal contact. The copper sheet winding 20 may be a primary winding or a secondary winding. Correspondingly, the winding winding 10 may be a secondary winding or a primary winding.

Since the copper sheet winding 20 itself has better heat dissipation capability, and the thermal contact portion 210 of the copper sheet 21 directly contacts the heat sink 40 to form a heat dissipation channel, which can further greatly improve the heat dissipation efficiency of the transformer; on the other hand, If the heat sink 50 is provided for the core assembly 30 on the heat sink 40, the heat generated by the core assembly 30 can be conducted to the heat sink 40 through the heat sink 50 for effective heat dissipation.

As for the heat dissipation plate 10, it can be further combined with other forms of heat dissipation devices, such as a large heat dissipation area fin-type radiator with a fan or water cooling equipment for forced heat dissipation, which can greatly increase the heat dissipation efficiency and effectively solve the problem of heat generation affecting the overall efficiency of the transformer .

Please refer to FIG. 11 to disclose the use state of the transformer of the present invention with its copper sheet winding 20 electrically connected to the outside, mainly by two electrical connection sheets 60 respectively screwed on the saddle 212 of each copper sheet 21 on the copper sheet winding 20 A plurality of through holes are formed at one end of the two electrical connection pieces 60, and each through hole respectively corresponds to the perforation on the saddle 212 in the same row. Using screws to pass through the corresponding through holes and perforations, the electrical connection piece 60 can be locked firmly On each copper sheet 21 of the copper sheet winding 20.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as above in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the profession Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modification into equivalent embodiments with equivalent changes, but any content that does not deviate from the technical solution of the present invention, according to the technology of the present invention Essentially, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

10: Winding winding 11: Winding frame 12: Coil 13: partition 130: Going through the groove 131: Mezzanine 14: sleeve 20: Copper sheet winding 21: Copper sheet 210: Thermal Contact Department 211: Ring 212: Anbu 213: Piercing 22: Fixed pad 220: cross arm 221: fixed hole 30: Iron Core Team 31, 32: iron core 40: Heat sink 41: Insulation layer 50: heat sink 60: power strip

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded view of a preferred embodiment of the present invention. Figure 3 is a front view of a bobbin according to a preferred embodiment of the present invention. Fig. 4 is a perspective view of a copper sheet according to a preferred embodiment of the present invention. Fig. 5 is a side view of a copper sheet according to a preferred embodiment of the present invention. Fig. 6 is a front view of a copper sheet according to a preferred embodiment of the present invention. FIG. 7 is a plan view of a combination of a winding winding, a copper sheet winding, and a heat sink according to a preferred embodiment of the present invention. Fig. 8 is a top view of a combination of a winding winding, a copper sheet winding, and a heat sink according to a preferred embodiment of the present invention. Fig. 9 is a perspective view of another preferred embodiment of the present invention. Fig. 10 is a side view of another preferred embodiment of the present invention. Figure 11 is a schematic diagram of another preferred embodiment of the present invention in use.

10: Winding winding

11: Winding frame

12: Coil

20: Copper sheet winding

21: Copper sheet

210: Thermal contact part

212: Saddle

213: Piercing

22: fixed pad

30: iron core group

31, 32: iron core

40: heat sink

41: Insulation layer

Claims (10)

A transformer with a built-in heat dissipation channel, including: A heat sink; A winding winding is mainly composed of multiple sets of coils on a winding frame; A copper sheet winding with a plurality of copper sheets, each copper sheet is arranged on the winding frame and arranged alternately with each group of coils, and at least one end of each copper sheet is formed with a thermal contact portion for fixing to the heat sink and forming Thermal contact An iron core group includes two iron cores, which are oppositely arranged on the winding frame and correspond to the coils and copper sheets on the winding frame. For the transformer with built-in heat dissipation channel as described in claim 1, each copper sheet of the copper sheet winding includes two ring portions, the upper end of the ring portion is formed with a gap, and the ring portion is formed by extending upward along the two ends formed by the gap. A saddle part is respectively connected to the two ends of the other ring part through the saddle part. For the transformer with built-in heat dissipation channel according to claim 2, the copper sheet forms the thermal contact portion at the bottom end of at least one ring portion. For the transformer with built-in heat dissipation channel described in claim 2, the copper sheet forms the thermal contact portion at the bottom ends of the two ring portions, respectively. For the transformer with built-in heat dissipation channel described in claim 2, the winding frame includes a plurality of partitions arranged in parallel and a hollow sleeve for connecting adjacent partitions. The partition is ring-shaped and a center is formed The piercing groove, the partition and the piercing groove are both rectangular, the sleeve is hollow, and its shape matches the piercing groove of the partition. For the transformer with built-in heat dissipation channel described in claim 5, the winding frame forms a winding space between two adjacent partitions and the sleeve between them, for respectively winding the coils. For example, the transformer with built-in heat dissipation channel described in claim 5, each partition of the bobbin is formed with a hollow interlayer, and each copper sheet with matching shape is respectively penetrated therebetween. For the transformer with built-in heat dissipation channel described in claim 2, the copper sheet winding further includes two fixing pads, the fixing pad has a plurality of parallel and equidistantly arranged cross arms, and the number of the cross arms is equal to the number of the copper sheets of the copper sheet winding. Match the number so as to be inserted into the saddle of each copper piece, and a fixing hole is formed on each cross arm; A perforation is formed on the saddle part of the copper sheet, and the perforation corresponds to the fixing hole on the cross arm. For the transformer with a built-in heat dissipation channel according to any one of claims 1 to 8, the heat dissipation plate is provided with more than one heat sink, and the heat sink includes a vertical portion and a horizontally extending portion from the bottom of the vertical portion The horizontal part, the vertical part is close to the outer wall of the iron core of the iron core group to form a thermal contact, and the horizontal part is combined with the heat dissipation plate to form a thermal contact. According to the transformer with a built-in heat dissipation channel according to any one of claims 1 to 8, an insulating layer is formed on a surface of the heat dissipation plate that forms thermal contact with the copper sheet.

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