Reactor
By setting a radiator and thermal conductivity structure between the core and coil winding of the reactor, the problem of poor heat dissipation performance of the reactor is solved, and more effective cooling of the reactor is achieved, and the risk of local hot spots is reduced.
Patent Information
- Application Number
- CN202422101354.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The existing reactors have poor heat dissipation performance in power systems, resulting in local hot spots and affecting the stable operation of the reactors.
By setting a radiator and a thermally conductive structure between the core and the coil windings, the heat-conducting structure is used to exchange heat to the coil windings and the part of the core that is not in contact with the radiator, so as to cool the position of the core and coil windings away from the radiator.
It effectively reduces the possibility of local hot spots and improves the overall heat dissipation performance of the reactor.
Smart Images
Figure CN222952899U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electric power equipment and specifically provides a reactor. Background Art
[0002] Reactors are widely used in power systems because of their functions of limiting system short-circuit current and compensating capacitor current. With the continuous increase in power system capacity and switching frequency, the loss of reactors has increased significantly. Therefore, how to dissipate heat from reactors during power system operation has become a highly concerned issue in the industry.
[0003] In some related technologies, a water-cooled radiator is arranged around the coil winding of the reactor or inside the coil winding, and the heat generated by the coil winding is transferred to the water-cooled radiator, and the above heat is taken away by the cooling water circulation in the water-cooled radiator, thereby achieving the purpose of heat dissipation. However, in the actual installation of the radiator, due to the limitations of the core arrangement, the water-cooled radiator pipeline arrangement, and the inlet and outlet port structure of the water-cooled radiator, it is difficult to arrange the water-cooled radiator in the narrow space between adjacent cores, resulting in a local area of the coil winding that cannot be covered by the water-cooled radiator, resulting in the phenomenon of local hot spots, which affects the stable operation of the reactor.
[0004] Accordingly, a new solution is needed in the art to solve the above problems. Utility Model Content
[0005] The present application aims to solve the above technical problem, that is, to solve the problem of poor heat dissipation performance of existing reactors.
[0006] To this end, the present application provides a reactor, which includes:
[0007] Iron core;
[0008] A coil winding wound around the outer side of the core;
[0009] A heat sink, which is attached to the coil winding and / or the iron core;
[0010] A heat-conducting structure has one end attached to the heat sink and the other end extending in a direction away from the heat sink and attached to the coil winding, so that the portion of the coil winding away from the heat sink can exchange heat with the heat sink through the heat-conducting structure.
[0011] In one technical solution of the above reactor, the heat-conducting structure is a plurality of heat pipes arranged side by side along the surface of the heat sink; or
[0012] The heat conduction structure is a flat micro heat pipe array.
[0013] In a technical solution of the above reactor, a groove is provided on the surface of the heat sink, the heat conducting structure is arranged in the groove, and the outer surface of the heat conducting structure is in contact with the inner wall surface of the groove.
[0014] In a technical solution of the above reactor, a thermally conductive adhesive is provided between the heat sink and the thermally conductive structure.
[0015] In one technical solution of the above reactor, the heat sink comprises:
[0016] A first heat sink is disposed between the iron core and the coil winding, and the first heat sink is in contact with the surface of the iron core;
[0017] The heat conductive structure includes a first heat conductive structure disposed between the first heat sink and the coil winding.
[0018] In one technical solution of the above reactor, the heat sink comprises:
[0019] a second heat sink disposed in the coil winding;
[0020] The heat-conducting structure includes a second heat-conducting structure extending along the winding direction of the coil winding and sandwiched in the coil winding.
[0021] In a technical solution of the above-mentioned reactor, the iron core has a set of relative first surfaces and second surfaces, and a set of relative third surfaces and fourth surfaces, two first heat sinks are provided, the two first heat sinks are respectively bonded to the first surface and the second surface, and an end of the first heat conducting structure away from the first heat sink is respectively bonded to the third surface and the fourth surface.
[0022] In a technical solution of the above-mentioned reactor, two second heat sinks are provided, and the two second heat sinks are respectively located on the outside of the first heat sink, and one end of the second heat conductive structure away from the second heat sink extends along a direction parallel to the third surface and the fourth surface.
[0023] In one technical solution of the above reactor, the heat sink comprises:
[0024] a third heat sink, which is arranged outside the coil winding;
[0025] The heat-conducting structure comprises a third heat-conducting structure arranged on a surface of the third heat sink facing away from the iron core, and the third heat-conducting structure is in contact with an outer surface of the coil winding.
[0026] In a technical solution of the above reactor, the radiator is a water-cooled radiator.
[0027] As described above, the present application sets a first heat sink and a first heat-conducting structure between the iron core and the coil winding. The first heat-conducting structure can exchange heat between the coil winding and the portion of the iron core that is not in contact with the first heat sink and the first heat sink through the first heat-conducting structure, thereby cooling the iron core and the coil winding away from the first heat sink, reducing the possibility of local hot spots, and thus improving the overall heat dissipation performance of the reactor.
[0028] Furthermore, the present application arranges a second heat sink and a second heat-conducting structure in the coil winding. The second heat-conducting structure can exchange heat with the second heat sink through the second heat-conducting structure at the portion of the coil winding that is not in contact with the second heat sink, thereby cooling the position of the coil winding away from the second heat sink, reducing the possibility of local hot spots, and improving the overall heat dissipation performance of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:
[0030] Figure 1 is a schematic diagram of the overall structure of a reactor according to an embodiment of the present application;
[0031] Figure 2 yes Figure 1 A top view of the local location;
[0032] Figure 3 is a schematic diagram of a heat-conducting structure according to an embodiment of the present application;
[0033] Figure 4 is a schematic diagram of a heat conduction structure according to another embodiment of the present application.
[0034] In the figures, the reference numerals refer to the following:
[0035] 1. Iron core; 11. First surface; 12. Second surface; 13. Third surface; 14. Fourth surface; 2. Coil winding; 3. Radiator; 31. First radiator; 32. Second radiator; 4. Thermal conductive structure; 41. First thermal conductive structure; 42. Second thermal conductive structure. DETAILED DESCRIPTION
[0036] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.
[0037] It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the ordinal numbers "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0038] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] For the core-type three-phase reactor, in order to avoid the mutual influence of the magnetic flux between the three phases, the three cores are usually arranged at intervals and are independent of each other, and the coil windings are respectively wound on the outside of each core, which is also conducive to the heat dissipation of each core, thereby improving the performance of the reactor. However, due to the above-mentioned arrangement of the core, the arrangement of the water-cooled radiator pipeline, and the structure of the water-cooled radiator inlet and outlet ports (the arrangement of the water-cooled radiator pipeline and the inlet and outlet ports usually require a large space), the interval between adjacent cores is small, resulting in the inability to install the water-cooled radiator in the area between adjacent cores, and it can only be installed on the other two sides of the core. In this way, the coil windings in the area between adjacent cores cannot contact the water-cooled radiator, resulting in local hot spots in the area, affecting the heat dissipation performance of the reactor.
[0040] If all parts of the coil winding are to be cooled, the distance between adjacent cores needs to be increased so that the area between the adjacent cores can accommodate and install a water-cooled radiator, but this will increase the volume and weight of the entire reactor, which is contrary to the design concept of miniaturization and lightweight of the reactor. Therefore, the above methods all have significant disadvantages.
[0041] Reference Figure 1 , is a schematic diagram of the overall structure of a reactor according to an embodiment of the present application, which includes an iron core 1, a coil winding 2, a heat sink 3 and a heat-conducting structure 4.
[0042] Optionally, in one embodiment, the reactor is a three-phase reactor, and accordingly, the number of the iron cores 1 is three, and the three iron cores 1 are arranged at intervals. The coil winding 2 is wound around the outside of each iron core 1 respectively.
[0043] Reference Figure 1 and Figure 2 The transverse cross-section of the core 1 is a rectangle. For the convenience of description, one set of opposite surfaces of the core 1 is called the first surface 11 and the second surface 12, and the other set of opposite surfaces is called the third surface 13 and the fourth surface 14. Of the two adjacent cores 1, the third surface 13 of one core 1 corresponds to the fourth surface 14 of the other core 1.
[0044] In one embodiment of the present application, the heat sink 3 includes a first heat sink 31 and a second heat sink 32. Optionally, two first heat sinks 31 and two second heat sinks 32 are provided around each core 1. The heat conduction structure 4 includes a first heat conduction structure 41 corresponding to the first heat sink 31 and a second heat conduction structure 42 corresponding to the second heat sink 32.
[0045] The first heat sink 31 is arranged between the iron core 1 and the coil winding 2, and the two first heat sinks 31 are respectively in contact with the first surface 11 and the second surface 12 of the iron core 1. The first heat conductive structure 41 is arranged between the first heat sink 31 and the coil winding 2, and one end of the first heat conductive structure 41 is in contact with the surface of the first heat sink 31 away from the iron core 1, and the other end extends in a direction away from the first heat sink 31 and is respectively in contact with the coil winding 2. It should be noted that since the first heat conductive structure 41 is sandwiched between the coil winding 2 and the iron core 1, the first heat conductive structure 41 must also be in contact with the third surface 13 and the fourth surface 14 of the iron core 1.
[0046] Reference Figure 2 and Figure 3 In one embodiment of the present application, the first heat-conducting structure 41 is a plurality of heat pipes arranged side by side along the surface of the first radiator 31, and the heat pipes are bent and fit with the third surface 13 and the fourth surface 14 of the iron core 1. One end of the heat pipe close to the first radiator 31 is the condensation end, and the other end is the evaporation end. The heat of the third surface 13 and the fourth surface 14 of the iron core 1 and the part of the coil winding 2 away from the first radiator 31 is transferred to the heat pipe. After the heat pipe is heated, the liquid inside it evaporates and vaporizes. The steam flows to the other end (i.e., the end close to the first radiator 31) under a small pressure difference to release heat. After being cooled by the first radiator 31, it condenses into liquid. The liquid flows back to the evaporation end under the action of capillary force. In this way, the cycle repeats, and the heat is transferred from the evaporation end of the heat pipe to the condensation section to achieve heat exchange, and the part of the iron core 1 that is not in contact with the first radiator 31 is cooled.
[0047] Reference Figure 4In another embodiment of the present application, the first heat-conducting structure 41 is a flat micro-heat pipe array. Similarly, the flat micro-heat pipe array is bent and fits the third surface 13 and the fourth surface 14 of the iron core 1. The flat micro-heat pipe array is a flat plate-shaped heat pipe, which is similar to the principle of an ordinary heat pipe. It also has a condensation end and an evaporation end during the heat exchange process. Due to its structural characteristics, it is more conducive to heat diffusion of concentrated heat sources than ordinary heat pipes. In addition, the use of a flat micro-heat pipe array can increase the contact area between it and the first radiator 31, the iron core 1 and the coil winding 2, thereby improving the heat exchange efficiency. The structural composition and technical principles of the flat micro-heat pipe array are well-known technologies in the field, and this application will not elaborate on them in detail.
[0048] Although the first heat-conducting structure 41 is a heat pipe and a flat micro heat pipe array as an example in the above embodiments of the present application, it does not constitute a limitation to the present application. For example, in some other implementations, the first heat-conducting structure 41 can also be a material with high thermal conductivity. As long as the first heat-conducting structure 41 can achieve heat exchange between the first heat sink 31 and other areas.
[0049] In a possible implementation of the present application, a groove (not shown in the figure) is provided on the surface of the first heat sink 31, and the first heat-conducting structure 41 is arranged in the groove, and the outer surface of the first heat-conducting structure 41 is in contact with the inner wall surface of the groove, so that the contact area between the first heat sink 31 and the first heat-conducting structure 41 can be increased, thereby improving the heat exchange efficiency. The first heat-conducting structure 41 is arranged in the groove, and the groove also limits the first heat-conducting structure 41, limiting the movement of the first heat-conducting structure 41 relative to the first heat sink 31 and the coil winding 2. In addition, the first heat-conducting structure 41 is arranged in the groove, which can also reduce the pressure exerted by the coil winding 2 on the first heat-conducting structure 41, and prevent the first heat-conducting structure 41 from being deformed due to excessive pressure.
[0050] Optionally, in order to further improve the heat exchange efficiency between the first heat sink 31 and the first heat conductive structure 41, a thermal conductive adhesive may be arranged between the first heat sink 31 and the first heat conductive structure 41, and the thermal conductive adhesive may be filled in the gap between the first heat sink 31 and the first heat conductive structure 41, thereby reducing the contact thermal resistance and achieving the purpose of improving the heat exchange efficiency.
[0051] As mentioned above, the present application sets a first heat sink 31 and a first heat-conducting structure 41 between the iron core 1 and the coil winding 2. The first heat-conducting structure 41 can exchange heat between the coil winding 2 and the portion of the iron core 1 that is not in contact with the first heat sink 31 and the first heat sink 31 through the first heat-conducting structure 41, thereby cooling the iron core 1 and the coil winding 2 away from the first heat sink 31, reducing the possibility of local hot spots, and thus improving the overall heat dissipation performance of the reactor.
[0052] Reference Figure 1 and Figure 2 , the second heat sink 32 is arranged inside the coil winding 2, that is, during the winding process of the coil winding 2, a part of the coil is first wound around the iron core 1, and then the second heat sink 32 is placed, and then the winding is continued, so that the remaining coil surrounds the second heat sink 32, and finally after the coil winding 2 is formed, the second heat sink 32 is clamped inside the coil winding 2. Similarly, when placing the second heat sink 32, the second heat conductive structure 42 is fixed on the second heat sink 32, and the second heat conductive structure 42 is extended along the winding direction of the coil winding 2, and after the coil winding 2 is formed, the second heat conductive structure 42 is also clamped inside the coil winding 2.
[0053] It should be noted that the second heat sink 32 is located outside the first heat sink 31, and the specific type and arrangement of the second heat-conducting structure 42 are the same as those of the first heat-conducting structure 41, that is, the second heat-conducting structure 42 extends in a direction parallel to the third surface 13 and the fourth surface 14 of the core 1 to cool the portion of the core 1 that is not in contact with the first heat sink 31. The second heat-conducting structure 42 can be in the form of a heat pipe, a flat micro heat pipe array, etc., and a groove can also be provided on the second heat sink 3 to set the second heat-conducting structure 42 in the groove, or a heat-conducting glue can be provided between the second heat sink 3 and the second heat-conducting structure 42, etc., which will not be described in detail in this application.
[0054] The present application arranges a second heat sink 32 and a second heat-conducting structure 42 in the coil winding 2. The second heat-conducting structure 42 can exchange heat with the second heat sink 32 through the second heat-conducting structure 42 for the portion of the coil winding 2 that is not in contact with the second heat sink 32, thereby cooling the position of the coil winding 2 away from the second heat sink 32, reducing the possibility of the occurrence of local hot spots, and thus improving the overall heat dissipation performance of the reactor.
[0055] It can be seen that the first heat sink 31 and the first heat-conducting structure 41 are in contact with both the iron core 1 and the coil winding 2 due to their installation positions, thereby being able to cool both the iron core 1 and the coil winding 2. At the same time, on this basis, a second heat sink 32 and a second heat-conducting structure 42 are arranged inside the coil winding 2, which can further cool the coil winding 2 and thus enhance the heat dissipation effect.
[0056] Therefore, in some other implementations, under the premise of meeting the overall volume and weight requirements of the reactor, a third heat sink and a third heat conductive structure (not shown in the figure) may be arranged outside the coil winding 2, and the arrangement is similar to the first heat sink 31 and the first heat conductive structure 41 described above, and the third heat conductive structure is arranged on the side surface of the third heat sink away from the iron core 1, and the third heat conductive structure extends along the winding direction of the coil winding 2 and fits the outer surface of the coil winding 2. It can be seen that by the arrangement of the third heat sink and the third heat conductive structure, the outer surface of the coil winding 2 can be further cooled, thereby improving the heat dissipation performance of the reactor.
[0057] It should be understood that the specific number and arrangement of the heat sink and the heat-conducting structure can be determined according to actual needs. For example, when the coil winding 2 generates a large amount of heat due to high power operation, the number of heat sinks and heat-conducting structures can be appropriately increased to meet the heat dissipation requirements. Similarly, when the power is low, the number of heat sinks and heat-conducting structures can be appropriately reduced to make the reactor more compact and lightweight as a whole.
[0058] It should be noted that, in order to ensure electrical isolation between the first heat-conducting structure 41 and the second heat-conducting structure 42 and the coil winding 2 or the iron core 1, an insulating layer is provided between the first heat-conducting structure 41 and the iron core 1, and between the first heat-conducting structure 41 and the coil winding 2. Similarly, an insulating layer is also provided between the two side surfaces of the second heat-conducting structure 42 and the coil winding 2.
[0059] In one implementation of the present application, the radiator may be a water-cooled radiator, with a liquid inlet and a liquid outlet respectively disposed at the upper and lower ends thereof, and the heat generated by the coil winding 2 is taken away by the circulation of cooling water. Of course, in some other implementations, the radiator may also be a phase change radiator, which has a phase change medium inside, and the heat generated by the coil winding 2 is taken away by the vaporization latent heat during the evaporation of the phase change medium. Of course, other cooling mediums may also be contained in the radiator, and the present application does not limit the specific type of the radiator.
[0060] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.
Claims
1. A reactor, characterized in that: include: Iron core; A coil winding wound around the outer side of the core; A heat sink, which is attached to the coil winding and / or the iron core; A heat-conducting structure has one end attached to the heat sink and the other end extending in a direction away from the heat sink and attached to the coil winding, so that the portion of the coil winding away from the heat sink can exchange heat with the heat sink through the heat-conducting structure.
2. The reactor according to claim 1, characterized in that: The heat-conducting structure is a plurality of heat pipes arranged side by side along the surface of the radiator; or The heat conduction structure is a flat micro heat pipe array.
3. The reactor according to claim 1, characterized in that: A groove is provided on the surface of the heat sink, the heat conducting structure is arranged in the groove, and the outer surface of the heat conducting structure is in contact with the inner wall surface of the groove.
4. The reactor according to claim 1, characterized in that: A heat-conducting adhesive is arranged between the heat sink and the heat-conducting structure.
5. The reactor according to any one of claims 1 to 4, characterized in that: The radiator comprises: A first heat sink is disposed between the iron core and the coil winding, and the first heat sink is in contact with the surface of the iron core; The heat conductive structure includes a first heat conductive structure disposed between the first heat sink and the coil winding.
6. The reactor according to claim 5, characterized in that: The radiator comprises: a second heat sink disposed in the coil winding; The heat-conducting structure includes a second heat-conducting structure extending along the winding direction of the coil winding and sandwiched in the coil winding.
7. The reactor according to claim 6, characterized in that: The iron core has a set of opposite first and second surfaces, and a set of opposite third and fourth surfaces. Two first heat sinks are provided, and the two first heat sinks are respectively fitted with the first surface and the second surface. An end of the first heat-conducting structure away from the first heat sink is respectively fitted with the third surface and the fourth surface.
8. The reactor according to claim 7, characterized in that: Two second heat sinks are provided, and the two second heat sinks are respectively located outside the first heat sink, and one end of the second heat conducting structure away from the second heat sink extends along a direction parallel to the third surface and the fourth surface.
9. The reactor according to any one of claims 1 to 4, characterized in that: The radiator comprises: a third heat sink, which is arranged outside the coil winding; The heat-conducting structure comprises a third heat-conducting structure arranged on a surface of the third heat sink facing away from the iron core, and the third heat-conducting structure is in contact with an outer surface of the coil winding.
10. The reactor according to claim 1, characterized in that: The radiator is a water-cooled radiator.