Common-mode magnetic ring assembly for direct-current power supply device

Abstract

The utility model discloses a common-mode magnetic ring assembly for a direct-current power supply device, which solves the technical problems that the conventional magnetic ring is easy to generate radial dislocation and is easy to fracture due to uneven stress and the like, and comprises a magnetic ring body, a support plate, an axial clamping unit and a radial clamping unit, the magnet ring body comprises a plurality of magnet rings which are coaxially stacked; the axial clamping unit comprises a first axial clamping piece and a second axial clamping piece, and the first axial clamping piece and the second axial clamping piece are located at the two axial ends of the magnetic ring body respectively, connected through a plurality of connecting rods and used for clamping and fixing the multiple magnetic rings in the axial direction; the radial clamping unit comprises a first radial clamping piece and a second radial clamping piece which are symmetrically arranged on the radial outer side of the magnetic ring body, the two ends of the first radial clamping piece and the two ends of the second radial clamping piece are connected with the first axial clamping piece and the second axial clamping piece correspondingly, and the inner sides of the first radial clamping piece and the second radial clamping piece abut against the outer wall of each magnetic ring correspondingly and are used for clamping and fixing each magnetic ring in the radial direction. According to the utility model, the problem that the magnetic ring is easy to misplace can be eliminated, so that the output stability of the positive conductive strip and the negative conductive strip is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a direct current power supply device, concretely relates to a common mode magnetic ring assembly for direct current power supply device. BACKGROUND

[0002] In power equipment, when high voltage and large current switch action with very fast change rate, electromagnetic radiation and switching ripple will be generated in the power supply equipment, which will cause common mode noise of electrostatic coupling between power electronic switching device and output circuit or ground, thereby affecting the sampling accuracy of equipment control sensor. At present, for high frequency ripple of power equipment, the general processing measure is to use filter capacitor and common mode magnetic ring respectively at both ends of the detection device at the output end of the power supply for filtering, the filter capacitor is used for processing high frequency switching ripple generated in the power supply, and the common mode magnetic ring is used for suppressing the interference of external environment on the power supply, and the detection accuracy of the detection device of the power equipment and the stability of the power equipment are improved to a certain extent.

[0003] The direct current power supply device is commonly used as power setting, and a plurality of common mode magnetic rings are generally sleeved on the front end of the output electrode to improve the anti-interference performance and the stability of the output. The structure of the common mode magnetic ring is a cylinder, and the outer periphery is smooth without mounting and fixing holes. Generally, when the common mode magnetic ring is applied in a high-precision direct current power supply device, the positive copper bar and the negative copper bar output by the direct current power supply are respectively sleeved through a plurality of stacked common mode magnetic rings, and the insulating plates and the metal mounting plates on the outer surfaces of the uppermost and lowermost common mode magnetic rings are stacked, and the metal plates and the insulating plates clamped along the axial direction of the common mode magnetic ring are pulled tight by the screw rod, so that the plurality of common mode magnetic rings are fixed. Meanwhile, the closed loop hole cannot be used at the metal mounting plate through which the copper bar passes, so as to avoid the problem of eddy current generated by the copper bar and the metal plate. Therefore, the mode only limits each magnetic ring from the axial direction, and there is no radial limiting measure, and after the direct current power supply device is transported and vibrated, the radial deviation between the common mode magnetic rings is easy to occur, the radial misalignment between the common mode magnetic rings originally stacked in order is easy to occur, and then the appearance structure and the electrical performance are affected. In addition, since the axial direction of the common mode magnetic ring has no damping measure, when the common mode magnetic ring is misaligned, the upper and lower clamping forces of the surrounding pull rod are easy to be affected, so that the stress of the stacked magnetic ring surface is uneven, and even the cracking occurs, and then the stability of the output of the power supply device is affected. SUMMARY

[0004] The utility model aims at solving the technical problems that the common mode magnetic ring is easy to be misaligned in the radial direction and is easy to be cracked due to uneven stress, and provides a common mode magnetic ring assembly for direct current power supply device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A common mode magnetic ring assembly for direct current power supply device, characterized in that:

[0007] The magnetic ring body, the support plate, the axial clamping unit and the radial clamping unit are included.

[0008] The magnetic ring body includes a plurality of magnetic rings coaxially stacked from top to bottom or from bottom to top, and each magnetic ring has the same structure and size.

[0009] The axial clamping unit includes a first axial clamping member and a second axial clamping member, which are respectively vertically installed on the same side of the support plate and are respectively located at the axial two ends of the magnetic ring body. The first axial clamping member and the second axial clamping member are respectively connected by a plurality of connecting rods for clamping and fixing the plurality of magnetic rings in the axial direction.

[0010] The radial clamping unit includes a first radial clamping member and a second radial clamping member, which are symmetrically arranged on the radial outside of the magnetic ring body, and the two ends are respectively connected with the first axial clamping member and the second axial clamping member, and the inner side is respectively abutted with the outer wall of each magnetic ring, for clamping and fixing the plurality of magnetic rings in the radial direction.

[0011] Further, it further includes a damping unit.

[0012] The damping unit includes a first damping pad and a second damping pad, and the first damping pad and the second damping pad are respectively pressed between the two ends of the magnetic ring body and the first axial clamping member and the second axial clamping member.

[0013] The first damping pad and the second damping pad are both circular ring structures, and are respectively matched with the radial dimension of the magnetic ring.

[0014] Further, the first axial clamping member and the second axial clamping member have the same structure, and the first axial clamping member includes a first mounting plate and a second mounting plate.

[0015] The first mounting plate is arranged near the end of the magnetic ring body, and the maximum transverse dimension is greater than the outer diameter of the magnetic ring. The middle part of the first mounting plate is provided with a first through hole, and the hole diameter of the first through hole is matched with the inner diameter of the magnetic ring.

[0016] The second mounting plate is located on the side of the first mounting plate away from the end of the magnetic ring body, and is connected with the first mounting plate. The second mounting plate is perpendicular to the support plate, and the end away from the support plate is provided with a groove, and the radial dimension of the groove is greater than the inner diameter of the magnetic ring. The second mounting plate is provided with a folded edge away from the first mounting plate in the circumferential direction, and is connected with the support plate through the folded edge.

[0017] The plurality of connecting rods are uniformly distributed in the circumferential direction of the magnetic ring body, and the two ends are respectively connected through the first mounting plate and the second mounting plate.

[0018] Further, the first radial clamping member and the second radial clamping member have the same structure.

[0019] The first radial clamping piece comprises a U-shaped plate and two L-shaped corner pieces; the length of the U-shaped plate is adapted to the axial length of the magnetic ring body, and the open end of the U-shaped plate faces the magnetic ring body and abuts against the outer wall of each magnetic ring; one end of each of the two L-shaped corner pieces is connected with the two ends of the U-shaped plate in the length direction, and the other end is connected with the corresponding first mounting plate.

[0020] Further, a vertical first long slot hole is arranged at the connection position of the folded edge of the second mounting plate and the support plate.

[0021] The bottom of each of the two ends of the U-shaped plate in the length direction is provided with a vertical second long slot hole at the connection position with the L-shaped corner piece.

[0022] The connection position of the L-shaped corner piece and the first mounting plate is provided with a transverse third long slot hole.

[0023] Further, two nuts are arranged at the two ends of each of the connecting rods, one of which is arranged on the side of the first mounting plate close to the magnetic ring body, and the other is arranged on the side of the second mounting plate away from the first mounting plate.

[0024] Further, a direct current electrode support unit is further included.

[0025] The direct current electrode support unit comprises a first support piece and a second support piece; the first support piece and the second support piece are arranged on the side of the first axial clamping piece and the second axial clamping piece away from the magnetic ring body, respectively.

[0026] The first support piece and the second support piece are U-shaped corner pieces, the bottom of which is mounted on the support plate, and the inner side of the open end is used for being connected with the positive electrode conductive strip and the negative electrode conductive strip through an insulator, respectively.

[0027] Further, the first damping pad and the second damping pad are made of silica gel.

[0028] Further, the first mounting plate is made of insulating material, and the second mounting plate is made of metal material.

[0029] Compared with the prior art, the utility model has the beneficial effects as follows:

[0030] 1. The axial clamping unit of the utility model comprises a first axial clamping piece and a second axial clamping piece, which are used for clamping and fixing a plurality of magnetic rings in the axial direction; the radial clamping unit comprises a first radial clamping piece and a second radial clamping piece, which are used for clamping and fixing a plurality of magnetic rings in the radial direction; the utility model clamps and fixes the magnetic rings in the axial and radial directions, eliminates the problem that the common mode magnetic ring is prone to misalignment, avoids the interference of the magnetic ring on the positive electrode conductive strip and the negative electrode conductive strip, and thus guarantees the stability of the positive electrode conductive strip and the negative electrode conductive strip.

[0031] 2、The utility model also includes first shock pad and second shock pad, not only can avoid that magnetic ring is held breakage, improves the anti -shock of common mode magnetic ring assembly simultaneously, ensures that its working performance still can be guaranteed under the environment and occasion of having vibration requirement.

[0032] 3、The utility model discloses first axial clamping piece, second axial clamping piece, first radial clamping piece and second radial clamping piece can be assembled individually, and combining corresponding long hole, can realize the fine adjustment of installation position, to guarantee the stability of magnetic ring body held.

[0033] 4、The utility model discloses being equipped with two nuts at both ends of every connecting rod, can further guarantee the clamping force of magnetic ring body, avoids the breakage of magnetic ring body due to the excessive clamping force, and further improves product quality and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the structure schematic diagram of the utility model embodiment.

[0035] Figure 2 It is the installation structure schematic diagram of first axial clamping piece, second axial clamping piece and magnetic ring body in the utility model embodiment.

[0036] Figure 3 It is the structure schematic diagram of first radial clamping piece in the utility model embodiment.

[0037] Figure 4 It is the local section structure and force schematic diagram of the utility model embodiment.

[0038] Figure 5 It is the installation process schematic diagram of radial clamping unit in the utility model embodiment.

[0039] The following is explained to the attached drawing mark:

[0040] 1-magnetic ring body, 101-magnetic ring, 2-supporting plate, 3-first axial clamping piece, 31-first mounting plate, 32-second mounting plate, 321-groove, 322-flange, 323-first long hole, 4-second axial clamping piece, 5-connecting rod, 51-nut, 6-first radial clamping piece, 61-U-shaped plate, 611-second long hole, 62-L-shaped corner piece, 621-third long hole, 7-second radial clamping piece, 8-first shock pad, 9-second shock pad, 10-first supporting piece, 11-second supporting piece, 12-insulator, 13-positive pole conductive strip, 14-negative pole conductive strip. DETAILED DESCRIPTION

[0041] In order to make the purpose, advantage and feature of the utility model more clear, the following is in combination with the attached drawing and specific embodiment to make further detailed description to the utility model.

[0042] As Figure 1 shown, the embodiment provides a common-mode magnetic ring assembly for a direct-current power supply device, comprising a magnetic ring body 1, a support plate 2, an axial clamping unit and a radial clamping unit.

[0043] The magnetic ring body 1 comprises a plurality of magnetic rings 101 coaxially stacked from top to bottom or from bottom to top, and each magnetic ring 101 has the same structure and size.

[0044] As Figure 2 shown, the axial clamping unit comprises a first axial clamping piece 3 and a second axial clamping piece 4, which are respectively installed vertically on the same side of the support plate 2 and are respectively located at the axial two ends of the magnetic ring body 1; the first axial clamping piece 3 and the second axial clamping piece 4 are connected by a plurality of connecting rods 5 respectively, for clamping and fixing the plurality of magnetic rings 101 along the axial direction.

[0045] The first axial clamping piece 3 and the second axial clamping piece 4 have the same structure, and the first axial clamping piece 3 is taken as an example. The first axial clamping piece 3 comprises a first mounting plate 31 and a second mounting plate 32. The first mounting plate 31 is arranged near the end of the magnetic ring body 1, which is perpendicular to the center axis of the magnetic ring body 1 and has a transverse maximum dimension greater than the outer diameter of each magnetic ring 101; the middle part of the first mounting plate 31 is provided with a through hole, and the hole diameter of the through hole is matched with the inner diameter of the magnetic ring 11. The first mounting plate 31 needs to be made of insulating material.

[0046] The second mounting plate 32 is located on the side of the first mounting plate 31 away from the end of the magnetic ring body 1, which is connected with the first mounting plate 31 and has the same transverse dimension as the first mounting plate 31. The second mounting plate 32 is perpendicular to the support plate 2, and the end away from the support plate 2 is provided with a groove 321, and the radial dimension of the groove 321 is greater than the inner diameter of the magnetic ring 101. The second mounting plate 32 is generally made of metal material.

[0047] The second mounting plate 32 is provided with a folded edge 322 away from the first mounting plate 31, and is connected with the support plate 2 through the folded edge 322. In order to improve the adaptability of the axial clamping unit and the magnetic ring body 1, the embodiment is provided with a vertical first long hole 323 at the connection between the folded edge 322 of the second mounting plate 32 and the support plate 2, so as to adjust the clamping force of the first axial clamping piece 3 and the second axial clamping piece 4 on the magnetic ring body 1.

[0048] The plurality of connecting rods 5 are uniformly distributed in the circumference of the magnetic ring body 1, and the two ends are connected through the first mounting plate 31 and the second mounting plate 32 respectively. The connecting rod 5 is a screw rod, and two nuts 51 are further arranged at the two ends of each connecting rod 5 respectively, one of which is located on the side of the first mounting plate 31 close to the magnetic ring body 1, and the other is located on the side of the second mounting plate 32 away from the first mounting plate 31. By adjusting the positions of the two nuts 51 on the corresponding connecting rod 5, the uneven force or damage of the magnetic ring body 1 caused by excessive tension of the connecting rod 5 can be avoided. Further, a gasket can be placed at the connection between the connecting rod 5 and the nut 51.

[0049] On this basis, the embodiment further includes a damping unit, which includes a first damping pad 8 and a second damping pad 9, and the first damping pad 8 and the second damping pad 9 are respectively crimped between the two ends of the magnetic ring body 1 and the first axial clamping piece 3 and the second axial clamping piece 4, that is, between the axial end of the magnetic ring body 1 and the corresponding first mounting plate 31. The first damping pad 8 and the second damping pad 9 are both circular ring structures, and are adapted to the radial dimension of the magnetic ring 101 respectively. The first damping pad 8 and the second damping pad 9 can be selected as silica gel pads, which not only avoid damage caused by the first axial clamping piece 3 and the second axial clamping piece 4 clamping the magnetic ring body 1 too tightly, but also increase the anti-vibration performance of the whole magnetic ring assembly.

[0050] In combination with Figure 1 and Figure 3 shown, the radial clamping unit of the embodiment includes a first radial clamping piece 6 and a second radial clamping piece 7, which are symmetrically arranged on the radial outside of the magnetic ring body 1, and the two ends are respectively connected with the first axial clamping piece 3 and the second axial clamping piece 4, and the inner sides are respectively abutted with the outer walls of each magnetic ring 101, for clamping and fixing the plurality of magnetic rings 101 along the radial direction, so as to realize the radial limiting of the whole magnetic ring body 1.

[0051] The first radial clamping piece 6 and the second radial clamping piece 7 are the same in structure, and the first radial clamping piece 6 is taken as an example. The first radial clamping piece 6 includes a U-shaped plate 61 and two L-shaped corner pieces 62. The length of the U-shaped plate 61 is adapted to the axial length of the magnetic ring body 1, and the opening end of the U-shaped plate 61 faces the magnetic ring body 1 and abuts with the outer wall of each magnetic ring 101. One end of each of the two L-shaped corner pieces 62 is connected with the two ends of the U-shaped plate 61 in the length direction, and the other end is connected with the corresponding first mounting plate 31.

[0052] The bottom of the U-shaped plate 61 at the length direction of both ends is connected with the L-shaped corner piece 62, and the second vertical long hole 611 is arranged at the connection position, and the L-shaped corner piece 62 is connected with the first mounting plate 31, and the third horizontal long hole 621 is arranged at the connection position. The second long hole 611 and the third long hole 621 can ensure that the first radial clamping piece 6 and the second radial clamping piece 7 can be adjusted in the radial and axial mounting positions, thereby providing appropriate clamping force for the magnetic ring body 1.

[0053] The embodiment limits the magnetic ring body 1 from six degrees of freedom, as shown in the figure, which shows the partial cross section and force diagram of the installation of the plurality of magnetic rings 101. Based on the arrangement of the axial clamping unit, the radial clamping unit and the damping unit, the position of each magnetic ring 101 can be stably and reliably limited and fixed. Figure 4

[0054] As shown in the figure, in order to ensure the relative position between the magnetic ring body 1 and the direct current electrode, the embodiment further comprises a direct current electrode supporting unit, which comprises a first supporting piece 10 and a second supporting piece 11; the first supporting piece 10 and the second supporting piece 11 are respectively located on the side of the first axial clamping piece 3 and the second axial clamping piece 4 away from the magnetic ring body 1, that is, the positive electrode conducting strip 13 and the negative electrode conducting strip 14 are arranged side by side, and the first supporting piece 10 and the second supporting piece 11 are respectively located at the two ends of the positive electrode conducting strip 13 and the negative electrode conducting strip 14 for supporting and fixing the end portions. Figure 5

[0055] The first supporting piece 10 and the second supporting piece 11 are respectively U-shaped corner pieces, the bottom of which is mounted on the supporting plate 2, the opening end is consistent with the opening direction of the groove 321, and the inner side of the opening end of the U-shaped corner piece is used for connecting the positive electrode conducting strip 13 and the negative electrode conducting strip 14 through the insulator 12. Not only can the positive electrode conducting strip 13 and the negative electrode conducting strip 14 be stably supported, but also the performance of the positive electrode conducting strip 13 and the negative electrode conducting strip 14 will not be interfered, thereby ensuring the stability of the direct current power supply device.

[0056] The embodiment is applied to the front end of the output electrode of the high-precision direct current power electronic equipment, solves the drawbacks of the installation and fixation of the plurality of magnetic rings in the past, and realizes the limiting and fixation of the circumference of the magnetic ring 101 by arranging two groups of symmetrical radial clamping pieces at the radial position of the magnetic ring 101. At the same time, by increasing the damping silica gel gasket in the axial direction of the plurality of magnetic rings 101, and arranging the inner and outer nuts 51 at the two ends of the connecting rod 5, the damage of the magnetic ring 101 caused by excessive tension can be avoided.

[0057] In combination with Figures 1 to 5 , the assembly process of the embodiment is as follows:

[0058] ​​(1), respectively, first axial clamping piece 3, second axial clamping piece 4, first radial clamping piece 6, second radial clamping piece 7 first assembly.

[0059] (2), assuming that the first axial clamping piece 3 is located below the magnetic ring body 1, first axial clamping piece 3 is installed on the support plate 2, the support plate 2 is fixed to the corresponding position in the DC power supply device. Support plate 2 can be designed as a whole plate according to the actual installation requirements, and the position of the connecting hole on the plate corresponds to the installation position of the first axial clamping piece 3 and the second axial clamping piece 4, and the connecting hole is pre-riveted with a nut. Alternatively, the support plate 2 can also be designed as an upper support plate and a lower support plate, corresponding to the first axial clamping piece 3 and the second axial clamping piece 4, respectively, and the support plate 2 is riveted with a nut at the corresponding second mounting plate 32.

[0060] When installing, first use the bolt to pass through the second mounting plate 32 of the first axial clamping piece 3, and extend into the nut riveted in the support plate 2, so as to install the first axial clamping piece 3 on the support plate 2 at the corresponding position, and then fasten the two. Then, the plurality of magnetic rings 101 are sequentially stacked on the first mounting plate 31 of the first axial clamping piece 3 to form a magnetic ring body 1. Then, according to the installation mode of the first axial clamping piece 3, the second axial clamping piece 4 is installed on the support plate 2, and the first axial clamping piece 3 and the second axial clamping piece 4 are connected through the connecting rod 5, so that the second axial clamping piece 4 abuts against the upper side of the magnetic ring body 1. In this process, the relative position of the first axial clamping piece 3, the second axial clamping piece 4 and the support plate 2 can be adjusted through the corresponding first long slot 323, so as to eliminate the deviation of the overall size caused by the thickness deviation of the plurality of magnetic rings 101.

[0061] (3), the opening end of the U-shaped plate 61 in the first radial clamping piece 6 and the second radial clamping piece 7 is directed towards the magnetic ring body 1, and is respectively radially close to the magnetic ring body 1 until the end of the opening end of the U-shaped plate 61 is tightly attached to the outer wall of each magnetic ring 101, and then the L-shaped corner piece 62 is connected with the corresponding first axial clamping piece 3 and second axial clamping piece 4 by using screws.

[0062] During the connection process, the first radial clamping piece 6 and the second radial clamping piece 7 can be adjusted in the axial and radial positions of the magnetic ring body 1 through the second long slot 611 and the third long slot 621, so as to ensure that the magnetic ring body 1 is stably installed in the axial and radial directions. Then, the upper end of the connecting rod 5 is fastened with the second axial clamping piece 4, and the second axial clamping piece 4 is fastened with the support plate 2.

[0063] (4), the positive electrode conductive strip 13 and the negative electrode conductive strip 14 are fixed respectively, specifically:

[0064] First, the first support 10 and the second support 11 are respectively installed at the corresponding positions on the support plate 2, which are respectively located on the side of the first axial clamping member 3 and the second axial clamping member 4 away from the magnetic ring body 1. Then, the positive electrode conductive strip 13 is passed through the center of the magnetic ring body 1, and the two ends of the positive electrode conductive strip 13 are respectively installed on the first support 10 and the second support 11 through the insulator 12, specifically on the inner wall of the corresponding U-shaped corner piece opening end. Finally, the negative electrode conductive strip 14 is installed in the above-mentioned manner, specifically on the inner wall of the corresponding U-shaped corner piece opening end on the other side, so as to realize the installation and fixation of the positive electrode conductive strip 13 and the negative electrode conductive strip 14, thereby completing the assembly of the overall common mode magnetic ring assembly.

[0065] The embodiment can meet the requirements of multiple magnetic ring installation, fastening, positioning and anti-vibration, and the magnetic ring is not easy to be clamped and damaged, thereby improving the quality and reliability of the product. At the same time, the magnetic ring is stably installed and firmly positioned, and can adapt to environments and occasions with vibration requirements.

[0066] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A common-mode magnetic ring assembly for a DC power supply device, comprising: a magnetic ring body (1), a support plate (2), an axial clamping unit, and a radial clamping unit; the magnetic ring body (1) comprises a plurality of magnetic rings (101) coaxially stacked from top to bottom or from bottom to top, and each magnetic ring (101) has the same structure and size; the axial clamping unit comprises a first axial clamping member (3) and a second axial clamping member (4), which are respectively vertically installed on the same side of the support plate (2) and are respectively located at the axial two ends of the magnetic ring body (1); the first axial clamping member (3) and the second axial clamping member (4) are connected by a plurality of connecting rods (5) respectively, for clamping and fixing the plurality of magnetic rings (101) in the axial direction; the radial clamping unit comprises a first radial clamping member (6) and a second radial clamping member (7), which are symmetrically arranged on the radial outside of the magnetic ring body (1), and the two ends are respectively connected with the first axial clamping member (3) and the second axial clamping member (4), and the inner side is respectively abutted with the outer wall of each magnetic ring (101), for clamping and fixing the plurality of magnetic rings (101) in the radial direction. 2.The common-mode magnetic ring assembly for a DC power supply device according to claim 1, further comprising a damping unit; the damping unit comprises a first damping pad (8) and a second damping pad (9), and the first damping pad (8) and the second damping pad (9) are respectively crimped between the two ends of the magnetic ring body (1) and the first axial clamping member (3) and the second axial clamping member (4); the first damping pad (8) and the second damping pad (9) are both circular ring structures, and are respectively matched with the radial dimension of the magnetic ring (101). 3.The common-mode magnetic ring assembly for a DC power supply device according to claim 1 or 2, wherein the first axial clamping member (3) and the second axial clamping member (4) have the same structure, and the first axial clamping member (3) comprises a first mounting plate (31) and a second mounting plate (32); the first mounting plate (31) is arranged close to the end of the magnetic ring body (1), and the maximum lateral dimension is greater than the outer diameter of the magnetic ring (101); the middle part of the first mounting plate (31) is provided with a through hole, and the hole diameter of the through hole is matched with the inner diameter of the magnetic ring (101); the second mounting plate (32) is located on the side of the first mounting plate (31) away from the end of the magnetic ring body (1), and is connected with the first mounting plate (31); the second mounting plate (32) is perpendicular to the support plate (2), and the end away from the support plate (2) is provided with a groove (321), and the radial dimension of the groove (321) is greater than the inner diameter of the magnetic ring (101); the circumferential direction of the second mounting plate (32) is provided with a folded edge (322) folded away from the first mounting plate (31), and the second mounting plate (32) is connected with the support plate (2) through the folded edge (322); the plurality of connecting rods (5) are uniformly distributed in the circumferential direction of the magnetic ring body (1), and the two ends are connected through the first mounting plate (31) and the second mounting plate (32). 4.The common-mode magnetic ring assembly for a DC power supply device according to claim 3, wherein the first radial clamping member (6) and the second radial clamping member (7) have the same structure. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first radial clamp (6) comprises a U-shaped plate (61) and two L-shaped corner pieces (62); the length of the U-shaped plate (61) is adapted to the axial length of the magnetic ring body (1), the open end of the U-shaped plate (61) faces the magnetic ring body (1) and abuts against the outer wall of each magnetic ring (101); one end of each L-shaped corner piece (62) is connected to the two ends of the U-shaped plate (61) in the length direction, and the other end is connected to the corresponding first mounting plate (31).

5. The common-mode magnetic ring assembly for a direct-current power supply device according to claim 4, characterized in that: The folded edge (322) of the second mounting plate (32) is provided with a vertical first long slot (323) at the connection with the support plate (2); The bottom of each end of the U-shaped plate (61) is provided with a vertical second long slot (611) at the connection with the L-shaped corner piece (62); The L-shaped corner piece (62) is provided with a horizontal third long slot (621) at the connection with the first mounting plate (31).

6. The common-mode magnetic ring assembly for a direct-current power supply device according to claim 5, characterized in that: Each of the connecting rods (5) is provided with two nuts (51) at both ends, one of which is located on the side of the first mounting plate (31) close to the magnetic ring body (1), and the other is located on the side of the second mounting plate (32) away from the first mounting plate (31).

7. The common-mode magnetic ring assembly for a direct-current power supply device according to claim 1, characterized in that: It further comprises a direct-current electrode support unit; The direct-current electrode support unit comprises a first support piece (10) and a second support piece (11); the first support piece (10) and the second support piece (11) are located on the side of the first axial clamp (3) and the second axial clamp (4) away from the magnetic ring body (1) respectively; The first support piece (10) and the second support piece (11) are U-shaped corner pieces, the bottom of which is mounted on the support plate (2), and the inner side of the open end is used to connect the positive conductive strip (13) and the negative conductive strip (14) through the insulator (12) respectively.

8. The common-mode magnetic ring assembly for a direct-current power supply device according to claim 2, characterized in that: The first shock-absorbing pad (8) and the second shock-absorbing pad (9) are made of silica gel.

9. The common-mode magnetic ring assembly for a direct-current power supply device according to claim 3, characterized in that: The first mounting plate (31) is made of insulating material, and the second mounting plate (32) is made of metal material.

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