A reactor

Abstract

The utility model provides a kind of electric reactor, belong to electronic device technical field.Electric reactor includes core and electric reactor coil;Core includes upper yoke, lower yoke and the middle column core being arranged between upper yoke and lower yoke;Electric reactor coil includes multiple annular coil layers, the coil layer of innermost layer forms cylindrical mouth, cylindrical mouth is sleeved on middle column core;Strut is arranged between two adjacent coil layers, and interlayer in electric reactor coil is close to with lower yoke side, interlayer extends to the outside of the cylindrical mouth, so that coil is assembled with yoke, and the end of the protruding part of cylindrical mouth is contacted with the surface of lower yoke by interlayer.The electric reactor provided by the embodiment of the application improves the coil structure, reduces the blockage between the coil and the yoke, ensures that the heat dissipation duct can dissipate heat normally, and can effectively improve the heat dissipation efficiency of the wind.

Description

Technical Field

[0001] This utility model relates to the field of electronic device technology, specifically to a reactor. Background Technology

[0002] Reactor coils are typically multi-layered structures made of aluminum or copper foil. The middle section of the coil is wound into a cylindrical shape and fitted onto an iron core. During operation, the coil generates heat. To address heat dissipation, interlayer supports are usually added between the coil layers to create interlayer cooling channels.

[0003] After the coil and the iron core are assembled, the cylindrical opening area of ​​the coil matches the iron yoke part of the iron core. This matching structure will cause the heat dissipation channel between coil layers to be blocked by the end face of the lower iron yoke, resulting in poor heat dissipation of the reactor. During use, the reactor may be damaged due to excessive heat generation. Utility Model Content

[0004] The purpose of this invention is to address the problem of poor heat dissipation in existing reactor structures by proposing a reactor with an improved heat dissipation structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A reactor, comprising an iron core and a reactor coil; The iron core includes an upper iron yoke, a lower iron yoke, and a central iron core disposed between the upper iron yoke and the lower iron yoke. The reactor coil includes multiple annular coil layers, with the innermost coil layer forming a cylindrical opening that is fitted onto the central core. An interlayer support is provided between two adjacent coil layers. On the side of the reactor coil near the lower yoke, the interlayer support extends to the outside of the cylindrical opening, so that after the coil is assembled with the yoke, the end of the interlayer support extending through the cylindrical opening contacts the surface of the lower yoke.

[0006] In some embodiments of this utility model, a plurality of interlayer support bars are provided at intervals between two adjacent coil layers, wherein, on the side of the reactor coil near the lower yoke, some of the interlayer support bars extend to the outside of the cylindrical coil opening.

[0007] In some embodiments of this invention, the interlayer support strips extending to the outer side of the cylindrical opening have the same length in the portion located outside the cylindrical opening.

[0008] In some embodiments of this utility model, the central core includes a first central core, a second central core, and a third central core arranged in a transverse sequence, and the reactor coil includes a first reactor coil assembled with the first central core, a second reactor coil assembled with the second central core, and a third reactor coil assembled with the third central core. The interlayer support bars provided on the side of the second reactor coil near the first reactor coil and the side of the third reactor coil both extend to the outside of the cylindrical coil opening.

[0009] In some embodiments of this utility model, the interlayer support strip provided on the side of the first reactor coil near the second reactor coil extends to the outside of the cylindrical coil opening; The interlayer support bar on the side of the third reactor coil near the second reactor coil extends to the outside of the cylindrical coil opening. In some embodiments of this utility model, the central core is a cuboid, the cylindrical opening is a rectangular opening, and the interlayer support strip extending to the outside of the cylindrical opening is located on the side of the rectangular opening along its length.

[0010] In some embodiments of this invention, the interlayer support strips extending to the outer side of the cylindrical opening include at least two strips.

[0011] Compared with the prior art, the technical advantages of this utility model are as follows: 1. The reactor provided in this application improves the reactor's coil structure by increasing the length of the interlayer support strip. When the coil is assembled with the iron core, the longer interlayer support strip mates with the end face of the lower yoke. This coil structure reduces blockage between the coil and the yoke, ensuring proper heat dissipation through the cooling airflow and effectively improving the efficiency of airflow cooling.

[0012] 2. The reactor provided in this application only increases the length of the support bar originally used when winding the coil, without requiring additional processes, and the modification cost is low.

[0013] 3. The reactor coil provided in this application has high heat dissipation efficiency and can be designed with a larger current density compared with conventional products, thereby reducing the raw material cost of the product. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a schematic diagram of the core structure in the prior art; Figure 2 This is a schematic diagram of a coil structure in the prior art; Figure 3 This is a schematic diagram of the assembly structure of the iron core and coil in the existing technology; Figure 4 This is a schematic diagram of the assembly structure of the iron core and coil in the existing technology; Figure 5 This is a schematic diagram of the core structure according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the coil in the first embodiment of this application; Figure 7 This is a schematic diagram of the second embodiment of the coil in this application; Figure 8 This is a schematic diagram of the assembly structure of the iron core and coil in an embodiment of this application.

[0016] In the above figures: 1. Iron core; 101. Upper yoke; 102. Lower yoke; 103. First central core; 104. Second central core; 105. Third central core. 2. Coil; 201. Coil layer; 202. First reactor coil; 203. Second reactor coil; 204. Third reactor coil; 3. Anti-slip support strip; 4. Interlayer bracing; 5. Pad coil support strip. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0020] Figures 1 to 4 The diagram shown is a structural diagram of a reactor in the prior art. It includes an iron core 1 and a coil 2, wherein the coil 2 is a multi-layer structure wound with aluminum foil or copper foil.

[0021] To address the electrical insulation issue between different coil layers, an insulating paper is typically added between the coil layers. The insulating paper is wider than the aluminum or copper foil, ensuring sufficient safety clearance between the aluminum or copper foil and the edge of the insulating paper. A slip-resistant support strip, approximately the same thickness as the foil, is added below the coil at the reserved safety clearance.

[0022] During coil operation, heat is generated. To address the coil heat dissipation issue, interlayer support strips 4 are typically added between each coil layer to create heat dissipation channels between the foils in the coil layers. During product assembly, coil 2 is fitted into the central core, with one side of the interlayer end face of coil 2 contacting the yoke. To prevent coil 2 from slipping and reducing the safety clearance, two support strips are usually added above the lower yoke 102 to support the coil pad support strips 5 below the coil. The interlayer end face of coil 2 contacts the coil pad support strips 5.

[0023] Traditional processing techniques have the following problems: The padding coil support strip 5 for supporting coil 2 is long and narrow, resulting in a large contact area with coil 2. This obstructs airflow into the inner layer of coil 2, reducing airflow utilization, decreasing heat removal, and causing higher product temperatures. To reduce the temperature, it is necessary to increase the airflow or use wider and thicker aluminum or copper foil to reduce losses, or sacrifice size to increase the heat dissipation area.

[0024] To solve the above technical problems, this application improves the structure of the reactor coil and yoke, and proposes a reactor with good heat dissipation.

[0025] Figures 5 to 8 This is a schematic diagram of the reactor structure in an embodiment of this application.

[0026] The reactor includes an iron core and a reactor coil; the iron core 1 includes an upper yoke 101, a lower yoke 102, and a central core disposed between the upper yoke 101 and the lower yoke 102. Taking an EI-type iron core as an example, the reactor's central core includes a first central core 103, a second central core 104, and a third central core 105 arranged sequentially in the transverse direction. The three central cores are of the same length and, together with the lower yoke 102, form an E-type structure. The upper yoke 101 is located at the top of the three central cores. The upper yoke 101 closes the magnetic circuit. The segmented design allows for adjustment of the magnetic reluctance distribution, reducing the risk of local saturation.

[0027] The number of reactor coils is the same as the number of core coils; for example, for an EI type core, it includes three coil units. Each coil includes multiple annular coil layers 201, which can be made of aluminum foil or copper foil. The aluminum / copper foil layers are wound, and the thickness of each foil layer (e.g., 0.1~0.5mm) and the interlayer insulation (e.g., DMD paper) must match the heat dissipation requirements. The edges of the foil must be chamfered or wrapped to prevent tip discharge.

[0028] The central column may employ stepped joints or air gap gaskets (such as epoxy resin) to control magnetic leakage and prevent eddy current overheating. EI sheets require annealing after lamination to restore permeability.

[0029] The innermost coil layer 201 forms a cylindrical opening, which is fitted onto the central core. An interlayer support bar 4 is provided between two adjacent coil layers 201. On the side of the reactor coil close to the lower yoke 102, the interlayer support bar 4 extends to the outside of the cylindrical opening, so that after the coil and the core are assembled, the end of the interlayer support bar 4 extending through the cylindrical opening contacts the surface of the lower yoke 102.

[0030] Multiple interlayer support bars 4 are arranged between any two adjacent coil layers 201. It should be understood that the multiple interlayer support bars 4 are arranged at intervals, serving two purposes: firstly, to support the winding (preventing foil collapse), and secondly, to form an axial heat dissipation channel between adjacent interlayer support bars 4 (the spacing between support bars is typically 5~10mm). The support bars extend out of the cylindrical coil opening and are pressed against the lower yoke 102, forming a mechanical support point. A gap is formed between the end of the cylindrical coil opening and the lower yoke 102 to ensure that the heat dissipation channel can dissipate heat normally after the reactor is assembled.

[0031] It should be understood that in this embodiment, only the size of the interlayer support strip 4 of the original air passage is increased to be higher than the coil structure. At the coil port position, it is not necessary to process the anti-slip support strip 3 again, and at the lower jaw of the iron core, it is not necessary to process the pad coil support strip 5 again, thereby reducing the raw material cost of the product and improving labor efficiency.

[0032] In some embodiments of this utility model, a plurality of interlayer support bars 4 are provided at intervals between two adjacent coil layers 201, wherein, on the side of the reactor coil near the lower yoke 102, some of the interlayer support bars 4 extend to the outside of the cylindrical coil opening.

[0033] In some embodiments of this utility model, the interlayer support strip 4 extending to the outside of the cylindrical opening has the same length in the portion located outside the cylindrical opening.

[0034] In some embodiments of this utility model, for the EI core, the center core includes a first center core 103, a second center core 104, and a third center core 105 arranged in a transverse sequence, and the reactor coil includes a first reactor coil 202 assembled with the first center core 103, a second reactor coil 203 assembled with the second center core 104, and a third reactor coil 204 assembled with the third center core 105.

[0035] The second central core 104 is located in the middle position, and the second reactor coil 203, which cooperates with the second central core 104, is also located in the middle position. (See reference) Figure 7 Both sides of the second reactor coil 203 are in contact with the lower yoke 102. Based on this, the interlayer support bars 4 on the side of the second reactor coil 203 closest to the first reactor coil 202 and the side closest to the third reactor coil 204 extend to the outer side of the cylindrical coil opening. With this structure, both sides of the second reactor coil 203 can cooperate with the lower yoke 102 to form a symmetrical and stable support structure, and both sides can ensure heat dissipation.

[0036] For EI reactors, both the first reactor coil 202 and the third reactor coil 204 have one side located outside the lower yoke 102, as referenced. Figure 6 In some embodiments of this invention, the interlayer support strip 4 of the first reactor coil 202 near the second reactor coil 203 extends to the outside of the cylindrical opening; the interlayer support strip 4 of the third reactor coil 204 near the second reactor coil 203 also extends to the outside of the cylindrical opening. Based on this structure, the interlayer support strip 4 on the side of the first reactor coil 202 and the third reactor coil 204 that contacts the lower yoke 102 is lengthened, ensuring the heat dissipation effect of the heat dissipation airflow on that side. The opposite side, located outside the lower yoke 102, is in direct contact with the air and does not require lengthening of the interlayer support strip 4.

[0037] In some embodiments of this utility model, the central column core is a cuboid, the cylindrical opening is a rectangular opening, and the interlayer support 4 extending to the outside of the cylindrical opening is located on the side of the rectangular opening along its length. This side is the side that directly contacts the lower yoke 102.

[0038] It should be understood that in some embodiments, it is not necessary to extend all interlayer support bars 4. At least two interlayer support bars 4 extend to the outside of the cylindrical coil opening. More specifically, at least two extended interlayer support bars 4 are located on one side of the cylindrical coil opening to form a relatively stable support. It should be understood that the number of extended interlayer support bars 4 can be selected based on the size of the reactor, the size of the coil, and the size of the iron core. In the embodiments of this application, the first reactor coil 202 and the third reactor coil 204 each have three extended interlayer support bars 4 on the side that contacts the lower yoke 102, and the second reactor coil 203 has three extended interlayer support bars 4 on both sides.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reactor, characterized in that, Including iron core and reactor coil; The iron core includes an upper iron yoke, a lower iron yoke, and a central iron core disposed between the upper iron yoke and the lower iron yoke. The reactor coil includes multiple annular coil layers, with the innermost coil layer forming a cylindrical opening that is fitted onto the central core. An interlayer support is provided between two adjacent coil layers. On the side of the reactor coil near the lower yoke, the interlayer support extends to the outside of the cylindrical opening, so that after the coil is assembled with the yoke, the end of the interlayer support extending through the cylindrical opening contacts the surface of the lower yoke.

2. The reactor as described in claim 1, characterized in that, A plurality of interlayer supports are provided between two adjacent coil layers, wherein, on the side of the reactor coil near the lower yoke, some of the interlayer supports extend to the outside of the cylindrical coil opening.

3. The reactor as described in claim 2, characterized in that, The interlayer bracing extending to the outside of the cylindrical opening has the same length in the portion located outside the cylindrical opening.

4. The reactor as described in claim 1, 2, or 3, characterized in that, The central core includes a first central core, a second central core, and a third central core arranged in a transverse sequence. The reactor coil includes a first reactor coil assembled with the first central core, a second reactor coil assembled with the second central core, and a third reactor coil assembled with the third central core. The interlayer support bars provided on the side of the second reactor coil near the first reactor coil and the side of the third reactor coil both extend to the outside of the cylindrical coil opening.

5. The reactor as described in claim 4, characterized in that, The interlayer support bar disposed on the side of the first reactor coil near the second reactor coil extends to the outside of the cylindrical coil opening; The interlayer support bar provided on the side of the third reactor coil near the second reactor coil extends to the outside of the cylindrical coil opening.

6. The reactor as described in claim 1 or 2, characterized in that, The central core is a cuboid, the cylindrical opening is a rectangular opening, and the interlayer support strip extending to the outside of the cylindrical opening is located on the side of the rectangular opening along its length.

7. The reactor as described in claim 6, characterized in that, The interlayer bracing extending to the outside of the cylindrical opening comprises at least two bars.

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