Electric reactor coil structure

Abstract

The utility model relates to the technical field of electric reactor structures, in particular to an electric reactor coil structure which comprises an inner supporting piece, a coil assembly is wound on the inner supporting piece and comprises a first winding part and a second winding part, and the first winding part is connected with the second winding part. And the winding direction of the first winding part is opposite to that of the second winding part. The reactor coil has the effect of improving the impedance in the reactor coil.

Description

Technical Field

[0001] The present application relates to the technical field of reactor structures, and in particular to a reactor coil structure. Background Art

[0002] In the field of reactor design and manufacturing, the coil winding process and structure are key steps in determining the performance of the reactor. Traditionally, the coil of the reactor is wound in a specific direction, a process that involves accurately calculating the number of turns required to achieve a predetermined inductance value.

[0003] Although the traditional reactor winding structure can provide stable inductance and impedance, it has inherent limitations in its ability to suppress short-circuit current. Specifically, the short-circuit current limiting ability of the reactor in the prior art is directly related to its internal impedance, and the improvement of the internal impedance often requires sacrificing the inductance value or increasing the overall size of the coil. Therefore, the main technical problem faced by the prior art is how to design a reactor coil that can improve the internal impedance and enhance the ability to suppress short-circuit current while maintaining a predetermined inductance value or a small change in inductance value without increasing the overall size of the coil. Summary of the invention

[0004] In order to improve the internal impedance of a reactor coil, the present application provides a reactor coil structure.

[0005] The present application provides a reactor coil structure, which adopts the following technical solution:

[0006] A reactor coil structure includes an inner support member, on which a coil group is wound, the coil group includes a first winding part and a second winding part, the first winding part is connected to the second winding part, and the winding direction of the first winding part is opposite to the winding direction of the second winding part.

[0007] By adopting the above technical scheme, the first winding part and the second winding part with opposite winding directions, after the first winding part and the second winding part are connected, the inductance values ​​will not cancel each other, so that the change of the total inductance value is low or the inductance value remains unchanged. The opposite winding directions can increase the length of the winding, increase the ability to suppress short-circuit current, and improve the internal impedance, so that while maintaining the original size of the coil, the resistance is increased, the ability to suppress short-circuit current is increased, and the internal impedance is improved.

[0008] Optionally, a plurality of shaping angle pieces are provided between the inner support member and the coil assembly, and the first winding portion and the second winding portion are both in contact with the shaping angle pieces.

[0009] By adopting the above technical solution, the shaping corner piece can provide support for the inner support piece and the coil group, which is convenient for shaping the winding of the first winding part and the second winding part.

[0010] Optionally, the coil assembly further includes a rewinding portion, and two ends of the rewinding portion are respectively connected to the first winding portion and the second winding portion.

[0011] By adopting the above technical solution, the rewinding portion allows the first winding portion and the second winding portion to coexist and be connected to each other at the same time, thereby increasing the length of the coil, increasing the ability to suppress short-circuit current, and improving the internal impedance.

[0012] Optionally, a limiting assembly for limiting the movement of the first winding portion is provided on the inner support member, and the limiting assembly passes through the rewinding portion.

[0013] By adopting the above technical solution, the limiting component can limit the first winding part, so as to facilitate the continued winding of the rewinding part and the second winding part, thereby improving the processing efficiency.

[0014] Optionally, the limiting assembly includes an adjustment plate and a limiting hanging rope, the adjustment plate is located between the shaping angle piece and the inner support piece, a fixed buckle block is provided on the adjustment plate, the limiting hanging rope is connected to one end of the inner support piece, the limiting hanging rope passes through the wrapping part, and the limiting hanging rope is buckled with the fixed buckle block.

[0015] By adopting the above technical solution, when the rewinding part is halfway through, the limiting hanging rope can be placed on the rewinding part so that the limiting hanging rope is buckled with the fixed buckle block, thereby limiting the position of the rewinding part and the first winding part, making it easier to wind the second winding part.

[0016] Optionally, an inner fixing rod is provided on the inner side of the shaping angle piece, the inner fixing rod passes through the shaping angle piece, and the inner fixing rod abuts against the side wall of the adjustment plate.

[0017] By adopting the above technical solution, the inner fixing rod can fill the gap between the shaping corner piece and the inner supporting piece, and at the same time assist in fixing the adjustment plate.

[0018] Optionally, an abutment plate is provided at the end of the inner support member, the abutment plate is plugged into the adjustment plate, and the adjustment plate is provided with a avoidance groove adapted to the limiting hanging rope.

[0019] By adopting the above technical solution, the abutment plate and the adjustment plate cooperate with each other to improve the stability of the inner support member.

[0020] Optionally, a side wall of the shaped corner piece is provided with a positioning groove for inserting the first winding portion and the second winding portion.

[0021] By adopting the above technical solution, the positioning groove helps to initially position the ends of the first winding portion and the second winding portion after winding.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The first winding part and the second winding part are in opposite winding directions. After the first winding part and the second winding part are connected, the inductance values ​​will not cancel each other, so that the change of the total inductance value is low or the inductance value remains unchanged. The opposite winding direction can increase the length of the winding, increase the ability to suppress short-circuit current, and improve the internal impedance, thereby increasing the resistance while maintaining the original size of the coil, increasing the ability to suppress short-circuit current, and improving the internal impedance;

[0024] 2. The shaping angle piece can provide support for the inner support piece and the coil assembly, facilitating the shaping of the winding of the first winding part and the second winding part;

[0025] 3. The rewinding portion allows the first winding portion and the second winding portion to coexist and be connected to each other, thereby increasing the length of the coil, increasing the ability to suppress short-circuit current, and improving the internal impedance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is an overall schematic diagram from another angle in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the disassembly of the inner support member, the shaped corner member and the abutment plate in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Inner support member; 11. First winding part; 12. Second winding part; 13. Rewinding part; 14. Abutment plate; 2. Shaped corner member; 21. Inner fixing rod; 22. Positioning groove; 3. Adjustment plate; 31. Fixed buckle block; 4. Limiting hanging rope. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] An embodiment of the present application discloses a reactor coil structure.

[0033] Reference Figure 1 and Figure 2A reactor coil structure includes an inner support member 1, which is in the shape of a rectangular strip. A coil group is wound on the outer side of the inner support member 1, and the coil group includes a first winding portion 11 and a second winding portion 12. The first winding portion 11 and the second winding portion 12 are arranged along the extension direction of the inner support member 1, and the first winding portion 11 and the second winding portion 12 are connected. The first winding portion 11 and the second winding portion 12 are both in the shape of a wire bundle wound in a spiral direction. The winding direction of the first winding portion 11 is opposite to that of the second winding portion 12. When the first winding portion 11 is wound in a clockwise direction, the second winding portion 12 is wound in a counterclockwise direction. Conversely, when the first winding portion 11 is wound in a counterclockwise direction, the second winding portion 12 is wound in a clockwise direction.

[0034] The first winding part 11 and the second winding part 12 are wound in opposite directions. Since the inductance value is proportional to the number of winding turns, and the inner support part 1 is not a magnetic core, the connected first winding part 11 and the second winding part 12 can reduce the change in the total inductance value or keep the inductance value unchanged, and the winding in the positive and negative directions can increase the wire length, thereby increasing the resistance without increasing the number of windings or winding layers. Therefore, while maintaining the original size of the coil, the ability to suppress short-circuit current can be increased, the internal impedance can be improved, and it is helpful to limit the short-circuit current. After the wire length is lengthened, the heat dissipation area is increased, which helps to effectively dissipate heat and enhance the heat dissipation capacity.

[0035] Reference Figure 1 and Figure 3 A plurality of shaping corner pieces 2 are arranged between the inner support member 1 and the coil group. The shaping corner pieces 2 are L-shaped plates. The extension direction of the shaping corner pieces 2 is consistent with the extension direction of the inner support member 1. In this embodiment, the number of the shaping corner pieces 2 is four. The shaping corner pieces 2 are distributed at four right angles of the inner support member 1 around the central axis of the extension direction of the inner support member 1. The shaping corner pieces 2 are plugged into the inner support member 1, and the first winding portion 11 and the second winding portion 12 are both in contact with and wound on the outside of the shaping corner piece 2.

[0036] The shaping corner piece 2 can provide support between the inner support member 1 and the coil group, which helps to shape the winding of the first winding part 11 and the second winding part 12, and when the coils are of the same size, the shaping corner piece 2 helps to reduce the weight of the coils and also helps to reduce the dimensional accuracy requirements of the inner support member 1.

[0037] Reference Figure 1 and Figure 2The coil assembly also includes a rewinding portion 13, which is in a U-shaped wire bundle shape. The rewinding portion 13 is located between the first winding portion 11 and the second winding portion 12. The two ends of the rewinding portion 13 are respectively connected to one end of the first winding portion 11 close to the second winding portion 12 and one end of the second winding portion 12 close to the first winding portion 11. The first winding portion 11, the second winding portion 12 and the rewinding portion 13 are integrally arranged, and the first winding portion 11, the second winding portion 12 and the rewinding portion 13 are closely adjacent.

[0038] The rewinding portion 13 can serve as a connecting section between the first winding portion 11 and the second winding portion 12, so that the first winding portion 11 and the second winding portion 12 can coexist in the same coil group, thereby increasing the wire length of the coil, and closely adjacent to each other will share the same space without significantly increasing the volume of the coil.

[0039] Reference Figure 1 and Figure 2 A limiting assembly for limiting the movement of the first winding portion 11 is provided on the inner support member 1 , and the limiting assembly passes through the gap of the U-shaped portion of the rewinding portion 13 .

[0040] During the production process, after the first winding portion 11 is wound, the first winding portion 11 can be limited by the limiting assembly, so as to facilitate the continued winding of the rewinding portion 13 and the second winding portion 12, thereby improving the processing efficiency and structural stability.

[0041] The limiting assembly includes an adjustment plate 3 and a limiting hanging rope 4. The adjustment plate 3 is located between the shaping angle piece 4 and the inner support 1. The adjustment plate 3 is in the shape of a rectangular plate. The extension direction of the adjustment plate 3 is consistent with the extension direction of the inner support 1. There are four adjustment plates 3 and they are distributed on the four side walls of the inner support 1. The plate surface of the adjustment plate 3 fits the side wall of the inner support 1. A fixed buckle block 31 is provided at one end of one of the adjustment plates 3. Both ends of the limiting hanging rope 4 are connected to one end of the inner support 1. The middle part of the limiting hanging rope 4 extends between the second winding part 12 and the adjustment plate 3 and passes through the gap of the U-shaped part of the rewinding part 13. The limiting hanging rope 4 abuts against the outer side of the first winding part 11, and the limiting hanging rope 4 is buckled with the fixed buckle block 31.

[0042] The adjustment plate 3 can adjust the distance between the shaping angle piece 2 and the inner support piece 1, thereby adjusting the inner diameter of the coil and indirectly changing the number of turns of the coil. The adjustment plate 3 of different thicknesses can be replaced according to actual needs to obtain coils of different sizes. After the first winding part 11 is wound and when the rewinding part 13 is half wound, the limiting hanging rope 4 is placed on the outside of the rewinding part 13 and the first winding part 11, and then the limiting hanging rope 4 is buckled with the fixed buckle block 31, so that the limiting hanging rope 4 can press the first winding part 11 when the other half of the rewinding part 13 and the second winding part 12 are wound, so that the first winding part 11 is not easy to move, thereby improving the winding efficiency and structural stability of the coil group.

[0043] Reference Figure 2 and Figure 3 An inner fixing rod 21 is provided on the inner side of the shaping angle piece 2. The cross section of the inner fixing rod 21 is L-shaped. The inner fixing rod 21 is embedded in the inner wall of the shaping angle piece 2. The extension direction of the inner fixing rod 21 is consistent with the extension direction of the shaping angle piece 2. The inner fixing rod 21 passes through both ends of the shaping angle piece 2. The side walls of the inner fixing rod 21 abut against the side walls of the adjustment plate 3, and the inner wall corners of the inner fixing rod 21 are engaged with the corners of the inner support member 1.

[0044] The inner fixing rod 21 can fill the gap between the inner supporting member 1 and the shaping angle member 2, thereby reducing the possibility of fine solids or dust entering the interior of the coil and improving the stability of the coil.

[0045] An abutment plate 14 is provided at the end of the inner support member 1, and the plate surface of the abutment plate 14 is in contact with the end surface of the inner support member 1. The abutment plate 14 is plugged into the adjustment plate 3, and the plugging direction of the abutment plate 14 and the adjustment plate 3 is perpendicular to the extension direction of the inner support member 1. The side wall of the adjustment plate 3 is provided with an avoidance groove adapted to the limiting hanging rope 4.

[0046] Before installing the inner fixing rod 21, the adjustment plate 3 can be first pressed against the side wall of the inner support member 1, and then the shaping angle member 2 can be installed and clamped with external force. Then the abutment plate 14 can be slidably inserted into the adjustment plate 3, and the plate surface of the abutment plate 14 can be pressed against the end face of the inner support member 1, thereby fixing multiple surfaces of the inner support member 1 and improving the stability of the coil.

[0047] Reference Figure 2 and Figure 3 A positioning groove 21 is provided on the side walls close to each other between the shaping angle pieces 2. The positioning groove 21 can be used for inserting the end 11 of the first winding part and the end of the second winding part 12. The shape and size of the positioning groove 21 are adapted to the ends of the first winding part 11 and the second winding part 12. After the preliminary winding is completed, the ends of the first winding part 11 and the second winding part 12 can be respectively inserted into the positioning groove 21, thereby completing the preliminary shaping of the winding and the coil, and reducing the situation where the ends of the first winding part 11 and the second winding part 12 swing randomly.

[0048] The implementation principle of a reactor coil structure in an embodiment of the present application is: by setting a first winding part 11 and a second winding part 12 with opposite winding directions, the first winding part 11 and the second winding part 12 are connected to each other, so that the inductance values ​​will not cancel each other out, so that the change in the total inductance value is low or the inductance value remains unchanged, and the opposite winding directions can increase the total length of the winding, while maintaining the original size of the coil, the resistance is increased, the ability to suppress short-circuit current is increased, the internal impedance is improved, and the heat dissipation capacity is enhanced.

[0049] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A reactor coil structure, characterized in that: The invention comprises an inner support member (1), on which a coil group is wound, the coil group comprising a first winding portion (11) and a second winding portion (12), the first winding portion (11) and the second winding portion (12) being connected, and the winding direction of the first winding portion (11) being opposite to the winding direction of the second winding portion (12).

2. A reactor coil structure according to claim 1, characterized in that: A plurality of shaped corner pieces (2) are arranged between the inner support piece (1) and the coil assembly, and the first winding portion (11) and the second winding portion (12) are both in contact with the shaped corner pieces (2).

3. A reactor coil structure according to claim 2, characterized in that: The coil assembly further comprises a rewinding portion (13), and two ends of the rewinding portion (13) are respectively connected to the first winding portion (11) and the second winding portion (12).

4. A reactor coil structure according to claim 3, characterized in that: The inner support member (1) is provided with a limiting assembly for limiting the movement of the first winding portion (11), and the limiting assembly passes through the rewinding portion (13).

5. A reactor coil structure according to claim 4, characterized in that: The position limiting assembly comprises an adjustment plate (3) and a position limiting hanging rope (4); the adjustment plate (3) is located between the shaping angle piece (2) and the inner support piece (1); a fixed buckle block (31) is provided on the adjustment plate (3); the position limiting hanging rope (4) is connected to one end of the inner support piece (1); the position limiting hanging rope (4) passes through the winding portion (13); and the position limiting hanging rope (4) is buckled with the fixed buckle block (31).

6. A reactor coil structure according to claim 5, characterized in that: An inner fixing rod (21) is provided on the inner side of the shaping angle piece (2), the inner fixing rod (21) passes through the shaping angle piece (2), and the inner fixing rod (21) abuts against the side wall of the adjustment plate (3).

7. A reactor coil structure according to claim 5, characterized in that: An abutment plate (14) is provided at the end of the inner support member (1), the abutment plate (14) is plugged into the adjustment plate (3), and the adjustment plate (3) is provided with a avoidance groove adapted to fit the limit hanging rope (4).

8. A reactor coil structure according to claim 7, characterized in that: The side wall of the shaped corner piece (2) is provided with a positioning groove (22) for inserting the first winding portion (11) and the second winding portion (12).

Images