A low-loss power transformer
By incorporating a cooling liquid flow structure within the transformer, the problem of poor cooling performance in existing transformers has been solved, effectively reducing temperature and power loss, and ensuring stable transformer operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING TUNDO TECH CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-06-30
AI Technical Summary
Existing transformer cooling methods are ineffective at dissipating heat from the core, resulting in significant power loss.
A low-loss power transformer was designed. By setting an inlet channel, first and second heat dissipation liquid channels, an outlet channel, and a heat dissipation liquid channel inside the outer casing, a cooling liquid flow structure is formed, which uses the cooling liquid to continuously remove the heat generated during the operation of the transformer.
It effectively reduces transformer temperature, minimizes power loss caused by high temperatures, and ensures stable and efficient operation of the transformer over a long period of time.
Smart Images
Figure CN224437342U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, and in particular to low-loss power transformers. Background Technology
[0002] Transformers, as key equipment for power transmission and distribution, are widely used in various fields such as industry, agriculture, transportation, and urban communities. Their working principle is based on electromagnetic induction, and through the synergistic action of the primary coil, secondary coil, and iron core, they achieve important functions such as voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization.
[0003] The core, as the main magnetic circuit component of a transformer, is typically made of stacked hot-rolled or cold-rolled silicon steel sheets with a high silicon content and an insulating varnish coating. When the transformer is energized, the core generates a large amount of heat. If this heat cannot be dissipated effectively and promptly, it will not only increase the power loss of the core itself but may also damage the transformer due to excessive temperature. Currently, common dry-type transformers rely on natural cooling through air convection or additional fan cooling, while oil-immersed transformers rely on oil as the cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, and forced oil circulation. However, these cooling methods are not very effective at dissipating heat from the transformer and cannot solve the problem of the core's heat being difficult to dissipate, resulting in significant power losses. Utility Model Content
[0004] The purpose of this invention is to provide a low-loss power transformer to address the aforementioned shortcomings in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A low-loss power transformer includes a magnetic core, a frame for fixing the magnetic core, and a winding wound around the frame. An outer casing is arranged around the winding. The frame includes a left frame and a right frame arranged opposite each other, and a connector connecting the left frame and the right frame. The bottom of the left frame has a first pin group connected to the winding, and the bottom of the right frame has a second pin group connected to the winding. The left frame has a liquid inlet, and the interior of the left frame has a liquid inlet channel communicating with the liquid inlet. The right frame has a liquid outlet, and the interior of the right frame has a liquid outlet channel communicating with the liquid outlet. The connector has a first heat dissipation liquid channel inside, and the outer casing has a second heat dissipation liquid channel inside. One end of the first and second heat dissipation liquid channels is connected to the liquid inlet channel, and the other end of the first and second heat dissipation liquid channels is connected to the liquid outlet channel.
[0007] In the aforementioned low-loss power transformer, the liquid inlet channel is sequentially provided with a first branch port, an annular branch port, and a second branch port along the flow direction of the cooling liquid.
[0008] The aforementioned low-loss power transformer has a first reflux port, an annular reflux port, and a second reflux port provided on the liquid outlet channel.
[0009] The aforementioned low-loss power transformer has a plurality of second heat dissipation liquid channels provided on the inner wall of the outer casing. The plurality of second heat dissipation liquid channels are arranged sequentially at intervals along the circumference of the outer casing. The inlet end of each second heat dissipation liquid channel is connected to the annular diversion port, and the outlet end of each second heat dissipation liquid channel is connected to the annular return port.
[0010] The aforementioned low-loss power transformer has two connectors arranged side by side, and each connector has a first heat dissipation liquid channel inside.
[0011] In the aforementioned low-loss power transformer, the first heat dissipation liquid channel is disposed on the side of the connector near the outer casing. The inlet end of the first heat dissipation liquid channel is connected to the first or second branch port, and the outlet end of the first heat dissipation liquid channel is connected to the first or second return port.
[0012] The aforementioned low-loss power transformer has a first heat dissipation structure on the connector, a second heat dissipation structure on the left and right frames, and annular heat dissipation fins on opposite sides of the outer casing, the annular heat dissipation fins being connected to the left or right frame.
[0013] In the above technical solution, the low-loss power transformer provided by this utility model includes a magnetic core, a frame for fixing the magnetic core, and windings wound around the frame. An outer casing is arranged around the windings. The frame includes a left frame and a right frame arranged opposite to each other, and a connector connecting the left frame and the right frame. The left frame has an inlet channel communicating with the liquid inlet, and the right frame has an outlet channel communicating with the liquid outlet. The connector has a first heat dissipation liquid channel, and the outer casing has a second heat dissipation liquid channel. Thus, a complete cooling liquid flow structure is formed by the inlet channel, the first heat dissipation liquid channel, the second heat dissipation liquid channel, and the outlet channel. The cooling liquid flows in the inlet channel, the first heat dissipation liquid channel or the second heat dissipation liquid channel, and the outlet channel, which can continuously remove the heat generated during the operation of the transformer, effectively reduce the transformer temperature, reduce power loss caused by high temperature, and thus ensure that the transformer can operate stably and efficiently for a long time. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0015] Figure 1 One of the perspective views of a low-loss power transformer provided in an embodiment of this utility model;
[0016] Figure 2 A second perspective view of a low-loss power transformer provided for an embodiment of this utility model;
[0017] Figure 3 This is a schematic diagram of the connection of the liquid inlet channel provided in an embodiment of the present utility model;
[0018] Figure 4 A schematic diagram of the connection of the liquid outlet channel provided in this embodiment of the utility model;
[0019] Figure 5 This is a schematic diagram of the internal structure of the outer cover provided in an embodiment of the present utility model;
[0020] Figure 6 This is a schematic diagram of the internal structure of the connector provided in an embodiment of the present utility model.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Magnetic core; 11. Winding; 2. Outer casing; 21. Second heat dissipation liquid channel; 22. Annular heat sink; 3. Frame; 31. Left frame; 311. Liquid inlet; 312. Liquid inlet channel; 313. First branch port; 314. Annular branch port; 315. Second branch port; 32. Right frame; 321. Liquid outlet; 322. Liquid outlet channel; 323. First return port; 324. Annular return port; 325. Second return port; 33. First pin group; 34. Second pin group; 35. Second heat dissipation structure; 4. Connector; 41. Thermal conductive component; 42. First heat dissipation structure; 43. First heat dissipation liquid channel. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0024] like Figure 1-6As shown, this utility model provides a low-loss power transformer, including a magnetic core 1, a frame 3 for fixing the magnetic core 1, and a winding 11 wound around the frame 3. An outer casing 2 is arranged around the winding 11. The frame 3 includes a left frame 31 and a right frame 32 arranged opposite to each other, and a connector 4 connecting the left frame 31 and the right frame 32. The bottom of the left frame 31 is provided with a first pin group 33 connected to the winding 11, and the bottom of the right frame 32 is provided with a second pin group 34 connected to the winding 11. The left frame 31 is provided with a liquid inlet 311. The internal part of the device is provided with an inlet channel 312 connected to the inlet port 311. The right frame 32 is provided with an outlet port 321. The internal part of the right frame 32 is provided with an outlet channel 322 connected to the outlet port 321. The internal part of the connector 4 is provided with a first heat dissipation liquid channel 43. The internal part of the outer cover 2 is provided with a second heat dissipation liquid channel 21. One end of the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21 is connected to the inlet channel 312. The other end of the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21 is connected to the outlet channel 322.
[0025] Specifically, the magnetic core 1 is fixed inside the frame 3, providing the magnetic circuit foundation for the transformer. The winding 11 is evenly wound on the frame 3 to achieve the electromagnetic conversion function. The outer casing 2 surrounds and wraps around the winding 11, cooperating with the heat dissipation channel connected to the frame 3 to jointly construct the heat dissipation system. The magnetic core 1 adopts the structure of existing technology, which will not be described in detail. The frame 3 includes a left frame 31, a right frame 32, and a connector 4 arranged opposite to each other. The left frame 31 and the right frame 32 are similar in shape to cuboids with flat bottoms, making it easy to place on a circuit board. The left frame 31 and the right frame 32 are connected by the connector 4. A first pin group 33 is provided at the bottom of the left frame 31, and a second pin group 34 is provided at the bottom of the right frame 32. Both the first pin group 33 and the second pin group 34 are composed of multiple metal pins arranged side by side. The pin surfaces are tin-plated to enhance conductivity and oxidation resistance. The leads of the winding 11 are connected to the pin groups by soldering. The outer casing 2 is cylindrical and its size is slightly larger than that of the winding 11, so that it can completely cover the winding 11. The outer casing 2 is made of metal, and the good thermal conductivity of metal is used to quickly transfer the heat generated by the winding 11.
[0026] In this embodiment, a liquid inlet 311 is provided on one side of the left frame 31. The liquid inlet 311 is rectangular. A liquid inlet channel 312 is provided inside the left frame 31, and the liquid inlet channel 312 is connected to the liquid inlet 311. A liquid outlet 321 is provided on one side of the right frame 32. The structure of the liquid outlet 321 is similar to that of the liquid inlet 311. A liquid outlet channel 322 is provided inside the right frame 32, and the liquid outlet channel 322 is connected to the liquid outlet 321. Both the liquid inlet 311 and the liquid outlet 321 are equipped with quick connectors for easy connection and disconnection with external cooling liquid pipelines. The first heat dissipation liquid channel 43 inside the connector 4 is tortuous, like a serpentine channel, thereby extending the flow path of the cooling liquid within the connector 4. There is a certain gap between the inner wall of the outer casing 2 and the winding 11. Multiple second heat dissipation liquid channels 21 are provided inside the outer casing 2. The multiple second heat dissipation liquid channels 21 are arranged sequentially and spaced apart along the circumference of the inner wall of the outer casing 2. Heat dissipation fins with uniform heat dissipation can be provided on the outer casing 2. One end of the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21 is connected to the liquid inlet 311, and the other end of the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21 is connected to the liquid outlet 321. Thus, the liquid inlet 311, the liquid inlet channel 312, the first heat dissipation liquid channel 43 or the second heat dissipation liquid channel 21, the liquid outlet channel 322 and the liquid outlet 321 are sequentially connected to form a liquid heat dissipation structure, forming a complete cooling liquid flow structure.
[0027] In this embodiment, during transformer operation, an external cooling liquid supply device connects cooling liquid to the inlet 311 via a pipeline and injects it into the inlet channel 312. After passing through the inlet channel 312, the cooling liquid is diverted to the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21. The liquid flows into the tortuous first heat dissipation liquid channel 43 inside the connector 4, absorbing heat from the connector 4 and surrounding components during its flow. As the cooling liquid flows along the second heat dissipation liquid channel 21 between the inner wall of the outer casing 2 and the winding 11, it fully absorbs the heat dissipated by the winding 11 and the magnetic core 1. Finally, the cooling liquid carrying heat flows into the outlet channel 322 and exits from the outlet 321, entering the external cooling device for cooling. The cooled cooling liquid is then injected back into the transformer through the inlet 311, and this cycle repeats continuously, carrying away the heat generated during transformer operation.
[0028] This utility model provides a low-loss power transformer, including a magnetic core 1, a frame 3 for fixing the magnetic core 1, and a winding 11 wound around the frame 3. An outer casing 2 is arranged around the winding 11. The frame 3 includes a left frame 31 and a right frame 32 arranged opposite to each other, and a connector 4 connecting the left frame 31 and the right frame 32. The left frame 31 has an inlet channel 312 communicating with an inlet port 311, and the right frame 32 has an outlet channel 322 communicating with an outlet port 321. The connector 4 has a first heat dissipation liquid channel 43 inside. The cover 2 is provided with a second heat dissipation liquid channel 21. Thus, a complete cooling liquid flow structure is formed by the liquid inlet channel 312, the first heat dissipation liquid channel 43, the second heat dissipation liquid channel 21, and the liquid outlet channel 322. The cooling liquid flows in the liquid inlet channel 312, the first heat dissipation liquid channel 43, the second heat dissipation liquid channel 21, and the liquid outlet channel 322, which can continuously remove the heat generated during the operation of the transformer, effectively reduce the transformer temperature, reduce the power loss caused by high temperature, and thus ensure that the transformer can operate stably and efficiently for a long time.
[0029] In this embodiment, preferably, the liquid inlet channel 312 includes a first diversion port 313, an annular diversion port 314, and a second diversion port 315 arranged sequentially. The liquid inlet channel 312 is arranged horizontally along the left frame 31. The first diversion port 313, the annular diversion port 314, and the second diversion port 315 are all connected to the liquid inlet channel 312. In this way, the cooling liquid flowing along the liquid inlet channel 312 will be diverted sequentially to the first diversion port 313, the annular diversion port 314, and the second diversion port 315. Moreover, the connection between the annular diversion port 314 and the liquid inlet channel 312 is relatively large, so that more cooling liquid is diverted into the annular diversion port 314.
[0030] In this embodiment, preferably, the liquid outlet channel 322 includes a first reflux port 323, an annular reflux port 324, and a second reflux port 325 arranged sequentially, and the first reflux port 323, the annular reflux port 324, and the second reflux port 325 are connected to each other in sequence; the liquid outlet channel 322 is arranged horizontally along the left frame 31, and the first reflux port 323, the annular reflux port 324, and the second reflux port 325 are all connected to the liquid outlet channel 322, so that after the cooling liquid is transported along the first heat dissipation liquid channel 43 and the second heat dissipation liquid channel 21, it flows back to the liquid outlet channel 322 through the first reflux port 323, the annular reflux port 324, and the second reflux port 325.
[0031] In this embodiment, preferably, the inner wall of the outer cover 2 is provided with a plurality of second heat dissipation liquid channels 21. The plurality of second heat dissipation liquid channels 21 are arranged sequentially at intervals along the circumference of the outer cover 2. The liquid inlet end of each second heat dissipation liquid channel 21 is connected to the annular diversion port 314, and the liquid outlet end of each second heat dissipation liquid channel 21 is connected to the annular return port 324. Thus, when the cooling liquid is diverted to the annular diversion port 314, it is dispersed from the annular diversion port 314 to the plurality of second heat dissipation liquid channels 21. The cooling liquid is transported along the second heat dissipation liquid channels 21 to fully absorb the heat dissipated by the winding 11 and the magnetic core 1. The cooling liquid in the second heat dissipation liquid channels 21 is transported from the liquid outlet end to the annular return port 324, and finally transported to the liquid outlet channel 322 through the annular return port 324.
[0032] In this embodiment, preferably, there are two connectors 4 arranged side by side. Each connector 4 has a first heat dissipation liquid channel 43 inside. The first heat dissipation liquid channel 43 is located on the side of the connector 4 near the outer cover 2, and a heat-conducting component 41 is provided on the side of the connector 4 near the outer cover 2. The liquid inlet of the first heat dissipation liquid channel 43 is connected to the first diversion port 313 or the second diversion port 315, and the liquid outlet of the first heat dissipation liquid channel 43 is connected to the first diversion port 313 or the second diversion port 315. Thus, the first diversion port 313 and the first heat dissipation liquid in one connector 4... Channel 43 is connected to the first return port 323. The first branch port 313 and the first heat dissipation liquid channel 43 in the other connector 4 are connected to the first return port 323. During use, the cooling liquid is transported along the inlet channel 312, from the first branch port 313 to the first heat dissipation liquid channel 43 in the connector 4, and from the first return port 323 to the outlet channel 322. At the same time, the cooling liquid is transported along the inlet channel 312 from the second branch port 315 to the first heat dissipation liquid channel 43 in the other connector 4, and from the second return port 325 to the outlet channel 322.
[0033] In this embodiment, preferably, the connector 4 is provided with a first heat dissipation structure 42, the left frame 31 and the right frame 32 are provided with a second heat dissipation structure 35, and the outer cover 2 is provided with annular heat dissipation fins 22 on opposite sides. The annular heat dissipation fins 22 are connected to the left frame 31 or the right frame 32. The heat dissipation effect of the connector 4, the left frame 31, the right frame 32 and the outer cover 2 can be improved through the first heat dissipation structure 42, the second heat dissipation structure 35 and the annular heat dissipation fins 22.
[0034] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A low-loss power transformer, comprising a magnetic core, a frame fixing the magnetic core, and a winding wound around the frame, characterized in that, An outer casing is arranged around the winding. The frame includes a left frame and a right frame arranged opposite each other, and a connector connecting the left frame and the right frame. The bottom of the left frame is provided with a first pin group connected to the winding, and the bottom of the right frame is provided with a second pin group connected to the winding. The left frame is provided with a liquid inlet, and the interior of the left frame is provided with a liquid inlet channel communicating with the liquid inlet. The right frame is provided with a liquid outlet, and the interior of the right frame is provided with a liquid outlet channel communicating with the liquid outlet. The connector is provided with a first heat dissipation liquid channel, and the outer casing is provided with a second heat dissipation liquid channel. One end of the first heat dissipation liquid channel and the second heat dissipation liquid channel are connected to the liquid inlet channel, and the other end of the first heat dissipation liquid channel and the second heat dissipation liquid channel are connected to the liquid outlet channel.
2. The low-loss power transformer according to claim 1, characterized in that, The liquid inlet channel is provided with a first branch port, an annular branch port, and a second branch port in sequence along the flow direction of the cooling liquid.
3. The low-loss power transformer according to claim 2, characterized in that, The liquid outlet channel is provided with a first reflux port, an annular reflux port, and a second reflux port.
4. The low-loss power transformer according to claim 3, characterized in that, The inner wall of the outer cover is provided with a plurality of second heat dissipation liquid channels, which are arranged sequentially at intervals along the circumference of the outer cover. The inlet end of each second heat dissipation liquid channel is connected to the annular diversion port, and the outlet end of each second heat dissipation liquid channel is connected to the annular return port.
5. The low-loss power transformer according to claim 3, characterized in that, There are two connectors, which are arranged side by side, and each connector has the first heat dissipation liquid channel inside.
6. The low-loss power transformer according to claim 5, characterized in that, The first heat dissipation liquid channel is disposed on the side of the connector near the outer cover. The inlet end of the first heat dissipation liquid channel is connected to the first or second diversion port, and the outlet end of the first heat dissipation liquid channel is connected to the first or second return port.
7. The low-loss power transformer according to claim 1, characterized in that, The connector is provided with a first heat dissipation structure, the left frame and the right frame are provided with a second heat dissipation structure, and the outer cover is provided with annular heat dissipation fins on opposite sides, the annular heat dissipation fins being connected to the left frame or the right frame.