CN210722670U - Transformer with built-in heat dissipation channel - Google Patents
Transformer with built-in heat dissipation channel Download PDFInfo
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- CN210722670U CN210722670U CN201922101377.7U CN201922101377U CN210722670U CN 210722670 U CN210722670 U CN 210722670U CN 201922101377 U CN201922101377 U CN 201922101377U CN 210722670 U CN210722670 U CN 210722670U
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- heat dissipation
- winding
- copper sheet
- transformer
- thermal contact
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Abstract
The utility model relates to a transformer with a built-in heat dissipation channel, which comprises a heat dissipation plate, a winding, a copper sheet winding and an iron core group; the winding is mainly characterized in that a plurality of groups of coils are arranged on a winding frame, the copper sheet winding is provided with a plurality of copper sheets, each copper sheet is arranged on the winding frame and is arranged with each group of coils at intervals, and at least one end of each copper sheet is provided with a thermal contact part for being fixed on the heat dissipation plate and forming thermal contact; the iron core group comprises two iron cores which are oppositely arranged on the winding frame and correspond to the coil and the copper sheets on the winding frame; by utilizing the design, at least one winding of the transformer is composed of the copper sheets and is in thermal contact with the heat dissipation plate to form a heat dissipation channel, so that the heat dissipation efficiency of the transformer is improved.
Description
Technical Field
The present invention relates to a transformer, and more particularly to a transformer with a built-in forced heat dissipation channel to improve heat dissipation efficiency.
Background
The transformer plays a role of voltage conversion in the power supply, heat is often generated due to loss in the process of electric energy conversion, and the line loss in the loss is difficult to effectively conduct heat out, so that the overall efficiency is reduced; it is conventional practice to increase the size of the transformer by using thicker copper wires or copper sheets to assist in heat dissipation. However, although the size of the current power supply is not changed, the power density is continuously increased, the size of the transformer is limited by the factors such as the specification, and the like, and cannot be increased, so that the heat dissipation must be assisted by other methods, and the performance is not reduced due to heat.
Most of the traditional transformers are formed by winding a plurality of groups of wire turns, and because the wire turns are insulated and the heat conductivity of an insulating material is poor, the heat accumulation condition is easily caused, and the efficiency is possibly influenced; or the winding and the copper sheet are matched to form the winding of the transformer respectively, and the current resistance is increased by means of the high conductivity of the copper sheet, so that the heating condition is reduced.
However, the two types of transformers still cannot reduce heat generation, and at present, heat is transferred to a circuit board (PCB) or other places for heat dissipation by using a point heat conducting adhesive, so that the heat dissipation efficiency cannot be effectively improved due to limited effect.
As can be seen from the above, the conventional transformer still has a problem that heat is generated to affect the overall efficiency, and further research and feasible solutions are needed.
SUMMERY OF THE UTILITY MODEL
Therefore, the present invention is directed to a transformer with a built-in heat dissipation channel, which mainly comprises at least one winding formed of copper sheets, and is combined with a heat dissipation plate to form a thermal contact, thereby providing a heat dissipation channel for the winding to effectively solve the problem of heat generation affecting efficiency.
The technical means adopted to achieve the above purpose is that the transformer with the built-in heat dissipation channel comprises:
a heat dissipation plate;
a winding, which is mainly characterized in that a winding frame is provided with a plurality of groups of coils;
a copper sheet winding, which is provided with a plurality of copper sheets, wherein each copper sheet is arranged on the winding frame and is arranged with each group of coils at intervals, and at least one end of each copper sheet is provided with a thermal contact part for being fixed on the heat dissipation plate and forming thermal contact;
and the iron core group comprises two iron cores which are oppositely arranged on the winding frame and correspond to the coil and the copper sheets on the winding frame.
Preferably, each copper sheet of the copper sheet winding comprises two ring portions, a notch is formed at the upper end of each ring portion, two ends of each ring portion formed along the notch extend upwards to form a saddle portion, and the saddle portion is correspondingly connected with two ends of the other ring portion.
Preferably, the copper sheet forms the thermal contact portion at the bottom end of at least one ring portion.
Preferably, the copper sheet forms the thermal contact portion at the bottom end of the two ring portions respectively.
Preferably, the bobbin comprises a plurality of partition plates arranged in parallel at intervals and a hollow sleeve for connecting each adjacent partition plate, the partition plates are annular, a through groove is formed in the centers of the partition plates, the partition plates and the through grooves are rectangular, and the sleeve is hollow and matched with the through groove of the partition plate in shape.
Preferably, the bobbin forms a winding space between two adjacent partitions and the sleeve therebetween for winding the coil respectively.
Preferably, each partition board of the bobbin is respectively formed with a hollow interlayer for the copper sheets with matching shapes to correspondingly penetrate therebetween.
Preferably, the copper sheet winding further comprises two fixing pads, each fixing pad is provided with a plurality of cross arms which are parallel to each other and are arranged at equal intervals, the number of the cross arms is matched with that of the copper sheets of the copper sheet winding so as to be correspondingly inserted into the saddle parts of the copper sheets respectively, and each cross arm is provided with a fixing hole;
a through hole is formed on the saddle part of the copper sheet and corresponds to the fixing hole on the cross arm.
Preferably, the heat sink plate is provided with more than one heat sink, the heat sink includes a vertical portion and a horizontal portion extending from the bottom of the vertical portion toward the horizontal direction, the vertical portion is closely attached to the outer wall of the iron core set to form thermal contact, and the horizontal portion is combined with the heat sink plate to form thermal contact.
Preferably, an insulating layer is formed on a surface of the heat dissipation plate in thermal contact with the copper sheet.
By utilizing the design, at least one winding of the transformer is composed of copper sheets, and each copper sheet is respectively combined to the heat dissipation plate through the thermal contact part arranged at least one end and forms thermal contact with the heat dissipation plate.
Drawings
Fig. 1 is a perspective view of a preferred embodiment of the present invention.
Fig. 2 is an exploded view of a preferred embodiment of the present invention.
Fig. 3 is a front view of the 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 the combination of the winding, copper sheet winding and heat sink plate according to a preferred embodiment of the present invention.
Fig. 8 is a top view of the combination of the winding, copper winding and heat sink plate 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.
Fig. 11 is a schematic view illustrating a usage status of another preferred embodiment of the present invention.
Detailed Description
The following description of the preferred embodiments of the present invention will be made in conjunction with the drawings and the accompanying drawings to further illustrate the technical means adopted to achieve the objects of the present invention.
Referring to fig. 1 and 2, a preferred embodiment of the present invention includes a winding coil 10, a copper sheet winding 20, an iron core assembly 30 and a heat sink 40; wherein the content of the first and second substances,
the winding 10 is mainly provided with a plurality of groups of coils 12 on a winding frame 11, the copper sheet winding 20 is provided with a plurality of copper sheets 21, each copper sheet 21 is arranged on the winding frame 11 and is arranged with each group of coils 12 at intervals, and at least one end of each copper sheet 21 is provided with a thermal contact part 210 which is used for being fixed on the heat dissipation plate 40 and forming thermal contact; the core assembly 30 includes two cores 31 and 32, which are oppositely disposed on the bobbin 11 and correspond to the coil 12 and the copper sheet 21 thereon.
The heat dissipation plate 40 is a flat plate made of a heat conductive metal, and in the present embodiment, is made of an aluminum sheet. An insulating layer 41 is formed on one surface of the heat dissipation plate 40 in thermal contact with the copper sheets 21 to ensure that the copper sheets 21 are not short-circuited when in thermal contact with the surface of the heat dissipation plate 40.
Referring to fig. 2 and 3, the bobbin 11 includes a plurality of partition plates 13 arranged in parallel and spaced apart from each other and a hollow sleeve 14 for connecting adjacent partition plates 13, the partition plates 13 are substantially annular, i.e. a through slot 130 is formed in the center, in this embodiment, the partition plates 13 and the through slot 130 are rectangular, and the sleeve 14 is also hollow, and the shape of the sleeve matches with the through slot 130 of the partition plate 13. Two adjacent spacers 13 and the sleeve 14 therebetween form winding spaces for winding the coils 12, respectively. Referring to fig. 3, each partition plate 13 is formed with a hollow interlayer 131 for the copper sheets 21 to penetrate.
Referring to fig. 2 and 4, each copper sheet 21 of the copper sheet winding 20 is formed by bending a thin copper sheet with a specific shape, and it should be noted that the copper sheet 21 of the copper sheet winding 20 may be formed by other conductive metal sheets besides copper. Each copper sheet 21 includes two ring portions 211, as shown in fig. 5, the shape of the ring portion 211 matches with the partition board 13 of the bobbin 11 and can be inserted into the interlayer 131 of the partition board 13 correspondingly, a notch is formed at the upper end of the ring portion 211, as shown in fig. 6, the two ends of the ring portion 211 formed along the notch extend upwards to form a saddle portion 212, the saddle portion 212 is connected with the two ends of the other ring portion 211 correspondingly, and a through hole 213 is formed on the two saddle portions 212 for power connection.
The bottom end of the ring portion 211 extends horizontally to form the thermal contact portion 210, so that the two ring portions 211 of the copper sheet 21 are bonded to the heat dissipation plate 40 by the thermal contact portion 210 at the bottom end and make thermal contact with the heat dissipation plate. The thermal contact portion 210 is formed at the bottom end of at least one ring portion 211 of the copper sheet 21, in this embodiment, the thermal contact portion 210 is formed at the bottom end of both ring portions 211 of the copper sheet 21; the thermal contact portion 210 of the copper sheet 21 and the heat dissipation plate 40 can be combined by screwing, welding or other feasible combining means, and in this embodiment, the thermal contact portion 210 of the copper sheet 21 is fixed to the heat dissipation plate 40 by welding.
As shown in fig. 2 and 7, the copper sheets 21 of the copper sheet winding 20 are respectively disposed in the interlayer 131 of the partition plate 13 of the bobbin 11, and are bonded to the heat dissipation plate 40 through the thermal contact portion 210 at the bottom end to form a thermal contact. Wherein, the winding frames 11 are positioned on the winding spaces formed between the adjacent partition plates 13 and the sleeves 14 therebetween and are respectively wound with the coils 12.
Still referring to fig. 1, the two iron cores 31 and 32 of the iron core set 30 may be EE-shaped or EI-shaped, in this embodiment, the two iron cores 31 and 32 are opposite EE-shaped, and penetrate through the two ends of the bobbin 11 oppositely, and correspond to the coil 12 and the copper sheet winding 20 on the bobbin 11.
As mentioned in the foregoing, each copper sheet 21 of the copper sheet winding 20 is electrically connected by the saddle 212, and in order to ensure the connection stability of the saddle 212, as shown in fig. 2, the copper sheet winding 20 further includes two fixing pads 22, the fixing pads 22 are E-shaped and have a plurality of cross arms 220 arranged in parallel and at equal intervals, the number of the cross arms is matched with the number of the copper sheets 21 of the copper sheet winding 20, each cross arm 220 is formed with a fixing hole 221, and the shape of the cross arm 220 is matched with the shape of the saddle 212 of the copper sheet 21. Thus, as shown in fig. 1 and 8, the fixing pad 22 is inserted into the saddle 212 of each copper sheet 21 with each arm 220, the fixing holes 221 of each arm 220 correspond to the through holes 213 of the saddle 212, and when the copper sheets 21 of the copper sheet winding 20 are electrically connected by screwing, the through holes 213 of the saddle 212 are screwed with the fixing holes 221 of each arm 220 of the fixing pad 23, so that the joint stability can be ensured.
Referring to fig. 9, a perspective view of another preferred embodiment of the present invention is disclosed, in order to further improve the heat dissipation efficiency of the transformer, the present invention provides a heat dissipation measure for the core assembly 30, two heat dissipation fins 50 are mainly disposed on the heat dissipation plate 10 adjacent to the core assembly 30, and the heat dissipation fins 50 include 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 outer walls of the cores 31 and 32 of the core assembly 30 to form a thermal contact, the horizontal portion is combined with the heat dissipation plate 40 to form a thermal contact, and the combination manner can be fixed by welding or thermal conductive glue.
As can be understood from the above description, the specific structure of the embodiments of the present invention is mainly that at least one winding of the transformer is made of copper sheets, and each copper sheet is respectively bonded to the heat dissipation plate 40 by a thermal contact portion provided at least one end and forms a thermal contact with the heat dissipation plate. The copper sheet winding 20 may be a primary winding or a secondary winding, and correspondingly, the winding 10 may be a secondary winding or a primary winding.
Because the copper sheet winding 20 has better heat dissipation capability originally, and the heat contact part 210 of the copper sheet 21 is directly in heat contact with the heat dissipation plate 40 to form a heat dissipation channel, the heat dissipation efficiency of the transformer can be further greatly improved; on the other hand, if the heat dissipation fins 50 are provided on the heat dissipation plate 40 for the core assembly 30, the heat generated by the core assembly 30 can be conducted to the heat dissipation plate 40 through the heat dissipation fins 50 to be dissipated efficiently.
The heat dissipation plate 10 may be further combined with other heat dissipation devices, such as a fin-type heat dissipation device with a large heat dissipation area to perform forced heat dissipation in cooperation with a fan or a water cooling device, so as to greatly improve the heat dissipation efficiency and effectively solve the problem that the overall efficiency of the transformer is affected by heat generation.
Referring to fig. 11, the transformer of the present invention is disclosed in which the copper sheet winding 20 is electrically connected to the outside, two electric connecting pieces 60 are screwed on the saddles 212 of the copper sheets 21 on the copper sheet winding 20, a plurality of through holes are formed at one end of the two electric connecting pieces 60, each through hole corresponds to a through hole on the saddle 212 in the same row, and the electric connecting pieces 60 can be firmly locked on each copper sheet 21 of the copper sheet winding 20 by passing a screw through the corresponding through hole and through hole.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. A transformer with a built-in heat dissipation channel is characterized by comprising:
a heat dissipation plate;
a winding, which is mainly characterized in that a winding frame is provided with a plurality of groups of coils;
a copper sheet winding, which is provided with a plurality of copper sheets, wherein each copper sheet is arranged on the winding frame and is arranged with each group of coils at intervals, and at least one end of each copper sheet is provided with a thermal contact part for being fixed on the heat dissipation plate and forming thermal contact;
and the iron core group comprises two iron cores which are oppositely arranged on the winding frame and correspond to the coil and the copper sheets on the winding frame.
2. The transformer with built-in heat dissipation channel as claimed in claim 1, wherein each copper sheet of the copper sheet winding includes two ring portions, the upper end of the ring portion forms a gap, the two ends of the ring portion formed along the gap extend upwards to form a saddle portion, and the saddle portion is connected to the two ends of the other ring portion correspondingly.
3. The transformer with built-in heat dissipation channel of claim 2, wherein the copper sheet forms the thermal contact portion at a bottom end of at least one of the ring portions.
4. The transformer with built-in heat dissipation channel as claimed in claim 2, wherein the copper sheet forms the thermal contact portion at the bottom end of the two ring portions.
5. The transformer with built-in heat dissipation channel as claimed in claim 2, wherein the bobbin comprises a plurality of partitions arranged in parallel and spaced apart, and a hollow sleeve for connecting adjacent partitions, the partitions are ring-shaped and have a through slot formed at the center thereof, the partitions and the through slot are rectangular, and the sleeve is hollow and has a shape matching the through slot of the partition.
6. The transformer with built-in heat dissipation channel as claimed in claim 5, wherein the bobbin forms a winding space together with the sleeve between two adjacent partitions for winding the coil respectively.
7. The transformer with built-in heat dissipation channel as claimed in claim 5, wherein each partition of the bobbin is formed with a hollow interlayer for the copper sheets with matching shapes to penetrate.
8. The transformer with built-in heat dissipation channel as claimed in claim 2, wherein the copper sheet winding further comprises two fixing pads, the fixing pads have a plurality of parallel and equidistantly arranged cross arms, the number of the cross arms matches the number of the copper sheets of the copper sheet winding to be respectively inserted into the saddles of the respective copper sheets, and a fixing hole is respectively formed on each cross arm;
a through hole is formed on the saddle part of the copper sheet and corresponds to the fixing hole on the cross arm.
9. The transformer according to any one of claims 1 to 8, wherein the heat spreader has one or more heat sinks, the heat sink includes a vertical portion and a horizontal portion extending horizontally from a bottom of the vertical portion, the vertical portion is closely attached to an outer wall of the core set to form a thermal contact, and the horizontal portion is bonded to the heat spreader to form a thermal contact.
10. The transformer with built-in heat dissipation channel as claimed in any one of claims 1 to 8, wherein an insulating layer is formed on a surface of the heat dissipation plate in thermal contact with the copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922101377.7U CN210722670U (en) | 2019-11-29 | 2019-11-29 | Transformer with built-in heat dissipation channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922101377.7U CN210722670U (en) | 2019-11-29 | 2019-11-29 | Transformer with built-in heat dissipation channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210722670U true CN210722670U (en) | 2020-06-09 |
Family
ID=70932560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922101377.7U Active CN210722670U (en) | 2019-11-29 | 2019-11-29 | Transformer with built-in heat dissipation channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210722670U (en) |
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2019
- 2019-11-29 CN CN201922101377.7U patent/CN210722670U/en active Active
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