A reactor

Abstract

The application relates to a reactor, which comprises a magnetic core column, a first winding, a second winding, a first magnetic core cover and a second magnetic core cover. The magnetic core column comprises a first magnetic core side column and a second magnetic core side column arranged side by side. The first winding is wound on the first magnetic core side column. The second winding is wound on the first magnetic core side column. The first magnetic core cover is arranged at one end of the magnetic core column and covers the first magnetic core side column and the second magnetic core side column. The second magnetic core cover is arranged at the other end of the magnetic core column and covers the first magnetic core side column and the second magnetic core side column.

Description

Technical Field

[0001] This application relates to the field of electromagnetic induction technology, specifically to a reactor. Background Technology

[0002] Reactors, also called inductors, are widely used in circuits. Because of the electromagnetic induction effect, they possess a certain degree of inductance, which helps to prevent changes in current. When a conductor carries current, it generates a magnetic field within the space it occupies; therefore, all current-carrying conductors have inductance in a general sense.

[0003] However, the inductance of a long, straight conductor carrying current is relatively small, and the magnetic field it produces is not strong. Therefore, practical reactors are made by winding wire into a solenoid, called air-core reactors. Sometimes, to give this solenoid a larger inductance, an iron core is inserted into the solenoid, called an iron-core reactor. Reactance is divided into inductive reactance and capacitive reactance. Inductive reactance (inductors) and capacitive reactance (capacitors) are collectively called reactors. Here, the capacitor refers to a capacitive reactance, while reactor specifically refers to an inductor.

[0004] Using low-loss magnetic cores has always been a concern in inductors and a problem that urgently needs to be solved in this field. Utility Model Content

[0005] In view of this, this application provides a reactor with low core loss.

[0006] This application provides a reactor, which includes a magnetic core post, a first winding, a second winding, a first magnetic core cover, and a second magnetic core cover. The magnetic core post includes a first magnetic core side post and a second magnetic core side post arranged side by side. The first winding is wound on the first magnetic core side post. The second winding is wound on the first magnetic core side post. The first magnetic core cover is disposed at one end of the magnetic core post, simultaneously covering the first and second magnetic core side posts. The second magnetic core cover is disposed at the other end of the magnetic core post, simultaneously covering the first and second magnetic core side posts.

[0007] Furthermore, the reactor also includes a heat sink, in which the first magnetic core side post, the second magnetic core side post, the first winding, the second winding, the first magnetic core cover, and the second magnetic core cover are all placed.

[0008] Furthermore, the heat sink box is provided with a cavity, a first protruding edge, and a second protruding edge. The first protruding edge and the second protruding edge divide the cavity into a first segment, a second segment, and a third segment. The first magnetic core cover and the second magnetic core cover are located in the first segment and the second segment, respectively. The first magnetic core side post and the second magnetic core side post are located in the second segment. The heat sink box is provided with heat dissipation fins corresponding to the first segment and the third segment.

[0009] Furthermore, the heat dissipation box includes a middle cover, a first side cover and a second side cover connected to both sides of the middle cover, and the cavity is formed by the middle cover, the first side cover and the second side cover. The first side cover and the second side cover are provided with heat dissipation fins.

[0010] Furthermore, the first protruding edge is located at the junction of the middle cover and the first side cover; the second protruding edge is disposed at the junction of the middle cover and the second side cover.

[0011] Furthermore, there is a gap between the first winding on the first magnetic core side post and the second winding on the second magnetic core side post, and the reactor also includes a heat sink, which seals the gap.

[0012] Furthermore, the heat sink includes a bottom end, a top end opposite to the bottom end, and two side ends connected between the top end and the bottom end. The top end is fitted into the gap, and the side ends are adapted to fit and conform to the first winding and the second winding. The side of the bottom end connected to the top end is fitted to the first winding and the second winding.

[0013] Furthermore, the heat sink has two concave curved surfaces on both sides, a rectangular bottom, and a straight top.

[0014] Furthermore, the first winding and the second winding are provided with electronic leads at one end near the first magnetic core cover, and the electronic leads are parallel to the side post of the first magnetic core or the side post of the second magnetic core.

[0015] Furthermore, the reactor also includes a first insulating partition and a second insulating partition, which are respectively disposed at opposite ends of the first magnetic core side post and the second magnetic core side post. The ends of the first magnetic core side post and the second magnetic core side post pass through the first insulating partition and the second insulating partition respectively and face the first magnetic core cover and the second magnetic core cover.

[0016] The aforementioned reactor, by having a first core side post and a second core side post, can reduce the volume of the core while increasing the cross-sectional area of ​​the coil, thereby reducing DC resistance, DC loss, and heat generation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the structure of the first magnetic device in the embodiments of this application.

[0019] Figure 2 This is a schematic diagram of the structure of the second type of magnetic device in the embodiments of this application.

[0020] Figure 3 This is a schematic diagram of the structure of the third type of magnetic device in the embodiments of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the fourth type of magnetic device in the embodiments of this application.

[0022] Figure 5 This is a schematic diagram of the structure of the middle cover and the first side cover in the embodiments of this application.

[0023] Figure 6 This is a schematic diagram of the structure of the middle cover, the first side cover, and the second side cover in the embodiments of this application.

[0024] Figure 7 This is a side view of the heat sink in an embodiment of this application.

[0025] Component designations First magnetic core cover 11 Second magnetic core cover 12 Core side post 20 First magnetic core side post 20a Second magnetic core side post 20b winding 30 First winding 30a Second winding 30b Electronic leads 31a Electronic leads 31b heat sink 40 top 41 side 42 bottom 43 heatsink 50 Middle cover 51 First side cover 52 Second side cover 53 First Top Wall 510 First side wall 512 Second side wall 514 Second top wall 520 Third side wall 522 Heat dissipation fins 5220 Third Top Wall 530 Fourth sidewall 532 Heat dissipation fins 5320 sidewall 502 First flange 503 Second flange 504 cavity 54 First paragraph 541 Second paragraph 542 Third paragraph 543 Mounting holes 5030 Mounting holes 5040 First insulating partition 60a Second insulating partition 60b positioning holes 61a positioning holes 61b Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0028] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0029] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0030] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.

[0032] Please refer to Figure 1 The reactor 1 includes a core cover 10, core side posts 20, windings 30, heat sinks 40, and a heat sink box 50. The core cover 10, core side posts 20, windings 30, and heat sinks 40 are respectively mounted on the heat sink box 50.

[0033] In this embodiment, the magnetic core side post 20 includes a first magnetic core side post 20a and a second magnetic core side post 20b arranged side by side. The winding 30 includes a first winding 30a and a second winding 30b. The first winding 30a consists of one or more coils wound in a spiral shape on the first magnetic core side post 20a according to a preset rule; the second winding 30b consists of one or more coils wound in a spiral shape on the second magnetic core side post 20b according to a preset rule. Therefore, in the same volume, since the reactor 1 has two magnetic cores, the first magnetic core side post 20a and the second magnetic core side post 20b, each magnetic core has a smaller volume, which can reduce DC loss. At the same time, the cross-sectional area is increased due to the presence of the first winding 30a and the second winding 30b, further reducing DC resistance and DC loss. There is a gap between adjacent positions of the first winding 30a on the first magnetic core side post 20a and the second winding 30b on the second magnetic core side post 20b. The ends of the first winding 30a and the second winding 30b are respectively connected to electronic leads 31a and 31b, which are arranged parallel to the first magnetic core side post 20a and the second magnetic core side post 20b.

[0034] The magnetic core cover 10 includes a first magnetic core cover 11 and a second magnetic core cover 12. The first magnetic core cover 11 is located at one end of the magnetic core side post 20, namely one end of the first magnetic core side post 20a and the second magnetic core side post 20b; the second magnetic core cover 12 is located at the other end of the magnetic core side post 20, namely the other end of the first magnetic core side post 20a and the second magnetic core side post 20b. The first magnetic core cover 11 and the second magnetic core cover 12 respectively cover the first magnetic core side post 20a and the second magnetic core side post 20b. The first magnetic core cover 11 and the second magnetic core cover 12 have the same structure and their cross-sections are approximately elliptical. Electronic leads 31a and 31b extend from the side of the first winding 30a and the second winding 30b closest to the first magnetic core cover 11 toward the second magnetic core cover 12, respectively.

[0035] The heat sink 40 is roughly ridge-shaped and is located between the first winding 30a on the first magnetic core side post 20a and the second winding 30b on the second magnetic core side post 20b. The heat sink 40 includes a bottom end 43, a top end 41 opposite to the bottom end 43, and two side surfaces 42 connecting the top end 41 and the bottom end 40. The bottom end 40 is rectangular, the top end 41 is located in the middle of the bottom end 40 and is approximately straight; the two side surfaces 42 are curved and concave inward. The top end 41 is embedded between the first winding 30a and the second winding 30b, and the two sides 42 are respectively adapted and fitted to the first winding 30a and the second winding 30b. The bottom end 43 is positioned opposite to the first winding 30a and the second winding 30b, so that the gap between the first winding 30a and the second winding 30b is sealed by the heat sink 40. The bottom end 40 is also in contact with the first winding 30a and the second winding 30b, thereby allowing the heat generated by the first winding 30a and the second winding 30b to be fully conducted. The electronic leads 31a and 31b are located at the bottom end 40 away from the top end 41. The heat sink 50 is generally shaped like a cover, including a middle cover 51, a first side cover 52 and a second side cover 53 connected to both sides of the middle cover 51, and a cavity 54 formed by the middle cover 51 and the first side cover 52 and the second side cover 53 connected to both sides of the middle cover 51. The first side cover 52, the middle cover 51, and the second side cover 53 are integrally formed and are arranged sequentially from the first magnetic core cover 11 towards the second magnetic core cover 12. The first side cover 52 and the second side cover 53 have the same structure and are symmetrically arranged on both sides of the middle cover 51.

[0036] Viewed from the outside of the heat sink 50, the middle cover 51 is generally arched. The middle cover 51 includes a rectangular first top wall 510, and first side walls 512 and second side walls 514 extending from both ends of the first top wall 510. The first side cover 52 includes a second top wall 520, and a third side wall 522 extending from the second top wall 520; one side of the second top wall 520 joins one side of the first top wall 510, and the third side wall 522 extends from the three free sides of the second top wall 520, and is provided with heat dissipation fins 5220. The second side cover 53 includes a third top wall 530, and a fourth side wall 532 extending from the third top wall 530. The fourth side wall 532 has heat dissipation fins 5320. One side of the third top wall 530 joins the side of the first top wall 510 away from the second top wall 520, so that the third top wall 530 and the second top wall 520 are respectively located on both sides of the first top wall 510 to form the top wall 510 of the heat sink 50. The fourth side wall 532 and the third side wall 522 are respectively arranged opposite to each other, and the first side wall 512 and the second side wall 514 are respectively located between the third side wall 522 and the fourth side wall 532, so that the first side wall 512, the second side wall 514, the third side wall 522 and the fourth side wall 532 together form the side wall 502 of the heat sink 50.

[0037] Viewed from the outside of the heat sink 50, a first protruding edge 503 is provided at the joint of the first side cover 52 and the middle cover 51, and a second protruding edge 504 is provided at the joint of the second side cover 53 and the middle cover 51, thereby dividing the cavity 54 into three segments: the first segment 541, the second segment 542, and the third segment 543. It can be understood that the heat sink 50 is divided into three segments from the first cover plate 11 toward the second cover plate 12, with the first side cover 52 corresponding to the first segment, the middle cover 51 corresponding to the second segment, and the second side cover 53 corresponding to the third segment. The first protruding edge 503 and the second protruding edge 504 are respectively adapted to the edge of the middle cover 51 along the arcuate strip. Mounting holes 5030 and 5040 are provided at the two ends of the first protruding edge 503 and the second protruding edge 504 for mounting the reactor 1 to an external object (not shown). It can be understood that the heat sink 50 has heat dissipation fins corresponding to the first and third segments to control the air gap distance. In this embodiment, the structure of the heat sink 50 can better dissipate the heat generated by the first magnetic core side post 20a and the second magnetic core side post 20b to the outside.

[0038] In this embodiment, the reactor 1 further includes a first insulating partition 60a and a second insulating partition 60b. The first insulating partition 60a is located between the first magnetic core cover 11 and the magnetic core side post 20, and the second insulating partition 60b is located between the second magnetic core cover 12 and the magnetic core side post 20. The first insulating partition 60a and the second insulating partition 60b have the same structure and are approximately matched with the cross-sectional shape of the first side cover 12 or the second side cover 13. The first insulating partition 60a and the second insulating partition 60b respectively receive positioning holes 61a and 61b through which the first magnetic core side post 20a and the second magnetic core side post 20b pass. After passing through the first insulating partition 60a and the second insulating partition 60b respectively, the first magnetic core side post 20a and the second magnetic core side post 20b abut against the first magnetic core cover 11 and the second magnetic core cover 12.

[0039] During assembly, firstly, the magnetic core cover 10, magnetic core side post 20, winding 30, and heat sink 40 are assembled together; secondly, the assembled magnetic core cover 10, magnetic core side post 20, winding 30, and heat sink 40 are placed inside the heat sink box 50, so that the first magnetic core cover 11 and the second magnetic core cover 12 are located at the first side cover 52 and the second side cover 53 respectively, the magnetic core side post 20, the first insulating partition 60a, and the second insulating partition 60b are located at the middle cover 51, and the two electronic leads 31a and 31b extend out of the heat sink box 50 from the second side cover 53; finally, high thermal conductivity potting silicone is used for sealing, thereby improving the sealing effect.

[0040] The reactor 1 described above, on the one hand, has a first magnetic core side post 20a and a second magnetic core side post 20b, which can reduce the volume of the magnetic core and increase the cross-sectional area of ​​the coil, thereby reducing DC resistance, reducing DC loss, and also reducing heat generation; on the other hand, due to the structure of the heat sink 50, the heat of the first magnetic core side post 20a and the second magnetic core side post 20b can be better dissipated to the outside.

[0041] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A reactor, characterized in that, The reactor includes: The magnetic core post includes a first magnetic core side post and a second magnetic core side post arranged side by side; The first winding is wound on the side post of the first magnetic core; A second winding wound on the side post of the first magnetic core; A first magnetic core cover is disposed at one end of a magnetic core post, and simultaneously covers the first and second magnetic core side posts; and The second magnetic core cover is placed at the other end of the magnetic core post, and simultaneously covers the first and second magnetic core side posts.

2. The reactor as described in claim 1, characterized in that, The reactor also includes a heat sink, in which the first magnetic core side post, the second magnetic core side post, the first winding, the second winding, the first magnetic core cover, and the second magnetic core cover are all placed.

3. The reactor as described in claim 2, characterized in that, The heat sink has a cavity, a first convex edge, and a second convex edge. The first convex edge and the second convex edge divide the cavity into a first segment, a second segment, and a third segment. The first magnetic core cover and the second magnetic core cover are located in the first segment and the second segment, respectively. The first magnetic core side post and the second magnetic core side post are located in the second segment. The heat sink has heat dissipation fins corresponding to the first segment and the third segment.

4. The reactor as described in claim 3, characterized in that, The heat dissipation box includes a middle cover, a first side cover and a second side cover connected to both sides of the middle cover, and the cavity is formed by the middle cover, the first side cover and the second side cover. The first side cover and the second side cover are provided with heat dissipation fins.

5. The reactor as described in claim 4, characterized in that, The first protruding edge is located at the junction of the middle cover and the first side cover; the second protruding edge is located at the junction of the middle cover and the second side cover.

6. The reactor as described in claim 4, characterized in that, There is a gap between the first winding on the first magnetic core side post and the second winding on the second magnetic core side post. The reactor also includes a heat sink, which seals the gap.

7. The reactor as described in claim 6, characterized in that, The heat sink includes a bottom end, a top end opposite to the bottom end, and two side ends connected between the top end and the bottom end. The top end is fitted into the gap, and the side ends are adapted to fit and conform to the first winding and the second winding. The side of the bottom end connected to the top end is fitted to the first winding and the second winding.

8. The reactor as described in claim 7, characterized in that, The heat sink has two concave curved sides, a rectangular bottom, and a straight top.

9. The reactor as described in claim 1, characterized in that, The first winding and the second winding are provided with electronic leads at one end near the first magnetic core cover, and the electronic leads are parallel to the side post of the first magnetic core or the side post of the second magnetic core.

10. The reactor as claimed in claim 1, characterized in that, The reactor further includes a first insulating partition and a second insulating partition, which are respectively disposed at opposite ends of the first magnetic core side post and the second magnetic core side post. The ends of the first magnetic core side post and the second magnetic core side post pass through the first insulating partition and the second insulating partition respectively and face the first magnetic core cover and the second magnetic core cover.

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