Magnetic bearing control box

Abstract

The utility model discloses a kind of magnetic bearing control box, it is related to magnetic levitation energy storage flywheel system technical field, to solve the problem of poor compatibility of existing control box, heat dissipation and electromagnetic shielding deficiency. It includes the main body box of detachable top cover plate, first, second function area is separately arranged in box: first function area extends along the length direction of box body, installs drive circuit board and control circuit board;Second function area is located at opposite side, same along length direction extends, installs power supply circuit board and the metal mounting plate with hole array, hole array is compatible with 8 / 16 channel signal acquisition board, and cooperation replaceable identification plate realizes multi-specification adaptation. Through linear convection air duct, layered space and high-efficiency heat dissipation of openwork structure, folding edge shielding part strengthens electromagnetic protection. The design improves compatibility, reduces control box type, optimizes heat dissipation and shielding performance, applicable to multi-power segment magnetic levitation flywheel system. It is cost-effective, and heat dissipation and shielding performance are excellent, applicable to magnetic levitation energy storage flywheel system.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic levitation energy storage flywheel systems, specifically to the structural design of a vacuum magnetic levitation bearing attitude control box. Background Technology

[0002] In existing magnetic levitation energy storage flywheel systems, the vacuum magnetic levitation bearing attitude control box typically adopts a design pattern of matching one flywheel with one control box. Due to the different power ranges and models of flywheels, different models of control boxes are required, resulting in a wide variety of control boxes with poor compatibility. This not only increases production and inventory costs but also increases the difficulty and cycle of maintenance.

[0003] To address the aforementioned issues, this invention proposes a highly integrated magnetic levitation bearing attitude control box compatible with multiple flywheel models. Through structural optimization, it achieves compatibility with multi-power segment and multi-channel signal acquisition, while simultaneously improving heat dissipation efficiency and electromagnetic shielding performance. Utility Model Content

[0004] The present invention aims to solve the problems of poor compatibility, wide variety, and difficult maintenance of magnetic levitation bearing attitude control boxes in the prior art, and to provide an integrated, highly compatible, easy-to-maintain control box structure with excellent heat dissipation and electromagnetic shielding performance.

[0005] This utility model overcomes the shortcomings of the above-mentioned technology and adopts the following technical solution: a magnetic bearing control box, comprising:

[0006] The main body 1 has a detachable top cover 11 on top;

[0007] The first functional area 12 is located on the first side of the box and extends along the length of the box, and is equipped with a drive circuit board 2 and a control circuit board 3.

[0008] The second functional area 13 is located on the second side of the enclosure opposite to the first side and extends along the length of the enclosure. It is equipped with a power circuit board 4 and a metal mounting plate 5. The metal mounting plate 5 is arranged along the length of the enclosure and has a perforation array 51 arranged along the length of the enclosure. The length of the perforation array 51 covers the distribution range of mounting holes of at least two different number of channels of signal acquisition circuit boards 7. The metal mounting plate 5 is equipped with a signal conversion circuit board 6 and a removable and replaceable signal acquisition circuit board 7 through detachable fasteners 52 and the perforation array 51. The signal acquisition circuit board 7 is arranged along the length of the enclosure.

[0009] An opening 14 is located on the long side of the housing 1 near the signal conversion circuit board 6, and a removable and replaceable label plate 8 is installed thereon. The label plate 8 is positioned corresponding to the signal acquisition circuit board 7 and has through holes 81 that match the number of channels of the current acquisition board.

[0010] Preferably, the signal acquisition circuit board 7 is an eight-channel magnetic bearing signal acquisition board or a sixteen-channel magnetic bearing signal acquisition board.

[0011] Preferably, the length of the opening 14 is not less than the maximum length of the signal acquisition circuit board 7.

[0012] Preferably, on the two opposite short sides of the main body 1, one side is provided with at least one air inlet filter assembly 9 and the other side is provided with at least one air outlet fan assembly 10, for forming a straight convection air duct that runs through the body.

[0013] Preferably, the first functional area 12 is arrayed with a vertically installed first group of hollowed-out isolation columns 12a, which support the drive circuit board 2 and the control circuit board 3 from bottom to top, forming a first-level space S1 between the drive circuit board 2 and the control circuit board 3; the second functional area 13 is arrayed with a vertically installed second group of hollowed-out isolation columns 13a, which support the power circuit board 4 and the metal mounting plate 5 from bottom to top, forming a second-level space S2 between the power circuit board 4 and the metal mounting plate 5; the extension directions of the first-level space S1 and the second-level space S2 are both parallel to the airflow direction of the straight convection duct.

[0014] Preferably, the first functional area 12 and the second functional area 13 are located on opposite sides inside the main body 1, and a middle main air duct S0 extending along the length of the body is formed between them; the middle main air duct S0 is connected to the straight convection air duct formed by the air inlet filter assembly 9 and the air outlet fan assembly 10.

[0015] Preferably, the metal mounting plate 5 is provided with a hollow structure 53 extending along the length direction. The length of the hollow structure 53 is 3 / 4 of the length of the metal mounting plate 5 and is located in the area directly below the signal acquisition circuit board 7.

[0016] Preferably, the edge of the metal mounting plate 5 extends toward the power circuit board 4 to form a folded shielding portion 54.

[0017] Preferably, the two ends of the metal mounting plate 5 are provided with concave edge notch structures 55 along the width direction to avoid interference in the installation space of the air inlet filter assembly 9 and the air outlet fan assembly 10.

[0018] Preferably, the signal conversion circuit board 6 is located on the edge of the metal mounting plate 5 near the first functional area 12, and its signal output end faces the control circuit board 3.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Strong compatibility: Through the modular mounting hole array of the metal mounting plate and the replaceable signal acquisition circuit board, it can achieve compatibility with different numbers of channels, such as 8 / 16 channels, and different power range flywheels, reducing the types of control boxes and reducing maintenance difficulty.

[0021] 2. High efficiency in heat dissipation: The combination of layered independent air ducts and straight convection design ensures uniform heat dissipation for each circuit board and avoids heat accumulation.

[0022] 3. Excellent electromagnetic shielding: The aluminum-zinc coated plate enclosure and the metal mounting plate with folded edge shielding work together to form full-band electromagnetic protection, improving the stability of signal acquisition. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the control box in this case;

[0024] Figure 2 This is the first side view of the interior of the control box in this case, where the sixteen-channel magnetic bearing signal acquisition board is installed.

[0025] Figure 3 This is the second side view of the interior of the control box in this case, where the sixteen-channel magnetic bearing signal acquisition board is installed.

[0026] Figure 4 This is a schematic diagram of the mounting plate structure in this case;

[0027] Figure 5 This is an internal side view of the control box in this case, where the eight-channel magnetic bearing signal acquisition board is installed. Detailed Implementation

[0028] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] like Figures 1 to 5 As shown, a magnetic bearing control box includes:

[0030] The main body 1 has a detachable top cover 11 on top;

[0031] The first functional area 12 is located on the first side of the box and extends along the length of the box, and is equipped with a drive circuit board 2 and a control circuit board 3.

[0032] The second functional area 13 is located on the second side of the enclosure opposite to the first side and extends along the length of the enclosure. It is equipped with a power circuit board 4 and a metal mounting plate 5. The metal mounting plate 5 is arranged along the length of the enclosure and has a perforation array 51 arranged along the length of the enclosure. The length of the perforation array 51 covers the distribution range of mounting holes of at least two different number of channels of signal acquisition circuit boards 7. The metal mounting plate 5 is equipped with a signal conversion circuit board 6 and a removable and replaceable signal acquisition circuit board 7 through detachable fasteners 52 and the perforation array 51. The signal acquisition circuit board 7 is arranged along the length of the enclosure.

[0033] An opening 14 is located on the long side of the housing 1 near the signal conversion circuit board 6, and a removable and replaceable identification plate 8 is installed thereon. The identification plate 8 corresponds to the position of the signal acquisition circuit board 7 and has through holes 81 matching the number of channels of the current acquisition board. Specifically, the main housing 1 is made of corrosion-resistant aluminum-zinc coated sheet with a thickness of 1mm, which is stamped and bent to form a cuboid structure with a length of 340mm, a width of 320mm, and a height of 100mm. The long side extends along the horizontal length direction, and the short side is perpendicular to the length direction. The top cover plate 11 is made of the same material and thickness of sheet metal and is fixed to the top of the housing by four sets of M4 stainless steel bolts. When the top cover plate is removed, the drive circuit board 2 and control circuit board 3 of the first functional area 12 and the power circuit board 4 and metal mounting plate 5 of the second functional area 13 can be directly exposed, so as to realize the rapid inspection and maintenance of internal components.

[0034] The first functional area 12 is mounted on the left inner wall of the first side of the enclosure along the width direction, and extends along the length direction of the enclosure for a length of 300mm, accounting for 88% of the total length of the enclosure. It integrates the drive circuit board 2 and the control circuit board 3, forming an upper and lower stacked structure, providing the hardware support for drive signal processing and control logic operation.

[0035] The second functional area 13 is symmetrically arranged on the inner right wall of the second side of the enclosure along the width direction, extending along the length direction of the enclosure for a length of 300mm, and integrates the power circuit board 4 and the metal mounting plate 5 inside.

[0036] The metal mounting plate 5 is made of 1mm thick galvanized steel plate and is arranged along the length of the box. Its surface is provided with an array of holes 51 distributed along the length direction. The array of holes 51 is divided into a signal conversion circuit board mounting subarray and a signal acquisition circuit board mounting subarray.

[0037] The signal conversion circuit board mounting subarray is arranged in a 2-row, 2-column rectangular grid with a single hole diameter of φ3mm. The column spacing in the length direction is 30mm, and the row spacing in the width direction is 20mm. It is directly aligned with the 4 mounting holes of the signal conversion circuit board 6 and fixed with detachable fasteners 52 (M3 stainless steel screws) to form an independent mounting area, avoiding interference with the hole positions of the signal acquisition board and ensuring the installation stability of the signal conversion module.

[0038] The signal acquisition circuit board mounting subarray is arranged in a 2x4 rectangular grid, with a single hole diameter of φ3mm. The spacing between columns along the length direction is as follows: 90mm between the first and second columns, 120mm between the second and third columns, and 90mm between the third and fourth columns. The row spacing in the width direction is 50mm, which matches the row spacing of the conversion subarray to ensure the flatness of the metal mounting plate surface. This subarray achieves multi-channel compatibility through precise hole matching.

[0039] The 8-channel signal acquisition board is 120mm long and has 4 mounting holes arranged in 2 rows and 2 columns, which are perfectly aligned with the second and third columns of holes in the sub-array (the two columns are 120mm apart). It is fixed with M3 screws and is suitable for signal acquisition requirements of low-power flywheels.

[0040] The 16-channel signal acquisition board is 300mm long and has 8 mounting holes arranged in 2 rows and 4 columns. It directly aligns with the 1st, 2nd, 3rd and 4th columns of holes in the sub-array (total coverage length 90+120+90=300mm). Each column of holes corresponds to a row of mounting holes on the acquisition board. The entire channel is fixed through continuous columns of holes, which is suitable for the signal acquisition requirements of high-power flywheels.

[0041] Both types of acquisition boards enable quick assembly and disassembly through standardized holes in the subarray, eliminating the need to adjust the array structure and balancing installation stability with compatibility with multiple specifications.

[0042] An opening with dimensions of 300mm in length and 120mm in height is provided on the long side of the housing 1 near the signal conversion circuit board. A removable and replaceable label plate is installed using six plastic clips. The label plate is made of 0.5mm thick transparent acrylic sheet, and the number and spacing of the through holes on its surface are matched one-to-one with the number of channels of the currently installed signal acquisition circuit board. For an 8-channel acquisition board, there are 8 Φ8mm through holes with a spacing of 20mm along the length. For a 16-channel acquisition board, there are 16 Φ8mm through holes with a spacing of 15mm along the length. The position of the through holes is precisely aligned with the signal interface of the acquisition board to facilitate the plugging and unplugging of external cables.

[0043] As described above, this magnetic bearing attitude control box achieves the dual goals of functional integration and multi-specification compatibility through meticulous structural design.

[0044] The main enclosure is made of corrosion-resistant aluminum-zinc coated steel sheet, paired with a removable top cover. This design ensures both structural strength and corrosion resistance, while the easy removal of the top cover allows for maintenance of internal functional modules without complex procedures, significantly improving maintenance efficiency. The first and second functional areas extend along the length, respectively housing drive control and power acquisition functions. This partitioned layout effectively reduces signal interference between different circuit modules, providing a fundamental structural guarantee for stable equipment operation.

[0045] The hole array design on the metal mounting plate is the core of its compatibility with acquisition boards of different channel counts. The signal conversion circuit board mounting subarray, with its fixed 2x2 row layout, provides independent mounting space for the conversion modules, avoiding conflicts with the acquisition board mounting and ensuring stable installation of each module. The signal acquisition circuit board mounting subarray, through precise hole spacing design, achieves compatibility with 8-channel and 16-channel acquisition boards: the 120mm spacing between the second and third columns of the 8-channel acquisition board perfectly matches its length and mounting hole distribution; the 300mm length covered by the four columns of holes perfectly matches its own length and mounting hole layout. This design allows a single metal mounting plate to meet the signal acquisition needs of flywheels with different power ratings, eliminating the need for separate customization for each specification and reducing mold investment and component inventory.

[0046] The openings and label panels on the side of the enclosure further enhance the overall design. The number and spacing of the through holes on the label panel vary according to the number of channels on the acquisition board, which not only intuitively indicates the current compatibility type but also ensures accurate connection between external cables and the acquisition board interface, reducing the possibility of wiring errors and making operation more convenient and efficient.

[0047] Overall, this design, through its reasonable structural layout, flexible aperture array adaptation, and precise marking correspondence, achieves functional integration while significantly improving the compatibility and maintenance convenience of the equipment, effectively reducing production and operation costs, and is suitable for magnetic levitation flywheel systems of various power ranges.

[0048] like Figure 2 and Figure 5 As shown, the signal acquisition circuit board 7 is an eight-channel magnetic bearing signal acquisition board or a sixteen-channel magnetic bearing signal acquisition board. Specifically, the eight-channel magnetic bearing signal acquisition board is 120mm long and has four mounting holes arranged in two rows and two columns, which are precisely aligned with the second and third columns of holes in the mounting sub-array of the signal acquisition circuit board. After being fixed with M3 screws, it can adapt to the signal acquisition needs of low-power magnetic levitation flywheels. Its signal interfaces are evenly distributed along the length direction and correspond one-to-one with the eight Φ8mm through holes on the label board. The sixteen-channel magnetic bearing signal acquisition board is 300mm long and has eight mounting holes arranged in two rows and four columns, which are completely matched with the first to fourth columns of holes in the sub-array. After installation, it can cover the full-channel signal acquisition of high-power magnetic levitation flywheels. The signal interface layout precisely matches the 16 Φ8mm through holes on the label board to ensure correct wiring.

[0049] As mentioned above, the two signal acquisition circuit boards achieve rapid switching within the same control box through the differentiated adaptation design of the metal mounting plate hole array. They can meet the signal acquisition requirements of different power magnetic bearing systems without modifying the box structure. Combined with the precise correspondence of the label plate, it not only ensures installation stability but also improves the versatility and maintenance efficiency of the equipment, providing flexible and reliable hardware support for multi-scenario applications.

[0050] like Figures 2-4 As shown, the length of the opening 14 is not less than the maximum length of the signal acquisition circuit board 7. Specifically, the sixteen-channel magnetic bearing signal acquisition board is 300mm long, and the opening is designed to be 300mm long, perfectly covering its entire length; the eight-channel magnetic bearing signal acquisition board is 120mm long, and its signal interface area is completely within the opening range during installation. This length design ensures that the signal interfaces of both acquisition boards can be exposed through the opening, and there is no need to adjust the opening size due to changes in acquisition board specifications. It is consistent with the hole array compatibility logic of the metal mounting plate, and achieves multi-specification adaptation through a standardized structure.

[0051] As described above, the magnetic bearing attitude control box constructs a complete modular compatibility system through the subdivision of signal acquisition circuit board types, the adaptation of openings and acquisition board lengths, and the precise matching of hole arrays to sub-arrays. This system not only meets the acquisition requirements of different channel numbers but also simplifies the assembly and maintenance process, thereby improving the versatility and practicality of the equipment.

[0052] like Figures 2-3 As shown, on the two opposite short sides of the main body 1, one side is provided with at least one air inlet filter assembly 9, and the other side is provided with at least one air outlet fan assembly 10, for forming a straight convection air duct that runs through the body.

[0053] Specifically, two sets of inlet filter components and two sets of outlet fan components are symmetrically distributed. The inlet components have a built-in 50-mesh metal filter to filter dust and impurities in the air, preventing them from entering the enclosure and affecting the circuit components. The outlet components use 12V DC axial fans with a single air volume of 15CFM. The airflow is driven by the pressure difference between the two sides to flow along the length of the enclosure, passing through the drive circuit board and control circuit board in the first functional area and the power circuit board and metal mounting plate in the second functional area. This quickly dissipates the heat generated by the components, keeping the temperature inside the enclosure below 55℃, and adapting to an external ambient temperature range of -40℃ to 70℃, ensuring the stability of magnetic bearing signal acquisition and control.

[0054] As described above, this symmetrically distributed airflow design not only constructs the first line of defense for internal components through the inlet air filter assembly, but also achieves uniform heat dissipation for each functional area through directional convection airflow paths, solving the problem of heat accumulation when multiple circuit boards operate simultaneously in a confined space. The low power consumption and wide temperature adaptability of the 12V DC fan allow the control box to meet the precision operation requirements of laboratory environments as well as adapt to the complex working conditions of industrial sites, providing reliable temperature field protection for the stable operation of eight-channel and sixteen-channel signal acquisition boards, further enhancing the environmental adaptability and operational durability of the equipment.

[0055] like Figure 2 and Figure 3As shown, the first functional area 12 is arrayed with a vertically installed first group of hollowed-out isolation columns 12a. The first group of hollowed-out isolation columns 12a supports the drive circuit board 2 and the control circuit board 3 from bottom to top, forming a first-level space S1 between the drive circuit board 2 and the control circuit board 3. The second functional area 13 is arrayed with a vertically installed second group of hollowed-out isolation columns 13a. The second group of hollowed-out isolation columns 13a supports the power circuit board 4 and the metal mounting plate 5 from bottom to top, forming a second-level space S2 between the power circuit board 4 and the metal mounting plate 5. The extension directions of the first-level space S1 and the second-level space S2 are both parallel to the airflow direction of the straight convection duct.

[0056] Specifically, both sets of isolation columns are made of PA66 flame-retardant nylon, with a single column height of 25mm. They are fixed to the bottom of the enclosure and the circuit board with M3 screws. The through holes in the hollow structure have a diameter of 8mm, ensuring unobstructed airflow. The first-level space S1 has a height of 15mm, which precisely accommodates the height difference between the components on the drive circuit board and the control circuit board, allowing the incoming airflow to flow evenly along the gap between the boards. The second-level space S2 has a height of 30mm, which is adapted to the height of vertical components such as capacitors on the power circuit board, preventing short circuits caused by contact between the components and the metal mounting plate.

[0057] Two tiered spaces and a linear convection duct form a three-dimensional airflow network: after entering from the inlet side, the airflow is dispersed into space S1 through the perforated structure of the first set of isolation columns, quickly carrying away the heat from the drive / control circuitry; simultaneously, it is diverted to the second functional area, guided by the second set of isolation columns through space S2, carrying away the heat from the power module and acquisition board, and finally discharged from the outlet side. This tiered airflow design improves the heat dissipation efficiency of each heat-generating component inside the enclosure, forming a closed-loop heat dissipation system with the inlet filter assembly and the outlet fan assembly, providing a stable environment for the high-precision signal processing of the magnetic bearing attitude control.

[0058] like Figure 2 and Figure 3 As shown, the first functional area 12 and the second functional area 13 are located on opposite sides inside the main body 1, and a middle main air duct S0 extending along the length of the body is formed between them; the middle main air duct S0 is connected to the straight convection air duct formed by the air inlet filter assembly 9 and the air outlet fan assembly 10.

[0059] Specifically, the central main air duct is 70mm wide, with 10mm gaps on both sides between it and the edges of the control circuit board in the first functional area and the metal mounting plate in the second functional area, respectively, to ensure unobstructed airflow. This air duct forms a three-dimensional ventilation network with the first and second level spaces; after the incoming airflow is diverted through the main air duct, part of it flows directly through the central main air duct to the exhaust side, while the other part enters the first and second level spaces respectively to provide targeted heat dissipation for the stacked circuit boards, before converging back into the main air duct for exhaust, thus improving the air exchange efficiency within the enclosure.

[0060] As described above, this multi-channel collaborative design, through the central role of the main air duct, organically integrates the linear convection air duct with the local airflow of the hierarchical space. This ensures both overall heat dissipation efficiency and precise cooling of high-heat-generating components. Combined with hardware support for inlet filtration and outlet air drive, the temperature fluctuation of the control box in an environment ranging from -40℃ to 70℃ is controlled within ±5℃, providing a stable working environment for the magnetic bearing attitude control. Figure 4 As shown, the metal mounting plate 5 has a hollow structure 53 extending along the length direction. The length of the hollow structure 53 is 3 / 4 of the length of the metal mounting plate 5 and is located directly below the signal acquisition circuit board 7.

[0061] Specifically, the hollow structure 53 serves as a heat exchange channel between the second-level space S2 and the bottom surface of the signal acquisition circuit board 7, allowing the cooling airflow within S2 to directly penetrate the metal mounting plate 5 and act on the heat-generating area of ​​the circuit board. Its length is set to 3 / 4 of the length of the metal mounting plate 5, preserving the structural integrity at both ends of the board to meet the mechanical requirements of the mounting interface and electrical connections; and maximizing coverage of the core heat dissipation area of ​​the circuit board. The layout located directly below the signal acquisition circuit board 7 precisely matches the heat distribution of the circuit modules, achieving targeted heat dissipation enhancement.

[0062] As described above, the hollow structure 53, through geometric parameter optimization and precise regional adaptation, overcomes the airflow obstruction limitation of the metal mounting plate, constructs a through-type heat dissipation path from the second-level space S2 to the hollow area and then to the bottom surface of the circuit board, and achieves a balance between structural strength, heat dissipation efficiency and electromagnetic shielding. The remaining area of ​​the metal plate can still maintain the shielding environment, providing efficient thermal management support for the stable operation of the signal acquisition circuit.

[0063] like Figure 4 As shown, the edge of the metal mounting plate 5 extends toward one side of the power circuit board 4 to form a folded shielding portion 54.

[0064] Specifically, the folded shielding part 54 is integrally bent along the circumferential edge of the metal mounting plate 5 and extends vertically toward the side where the power circuit board 4 is located. Its height is adapted to the inter-board spacing, forming a three-dimensional shielding enclosure around the area above the signal acquisition circuit board 7. This structure relies on the electromagnetic shielding properties of the metal material to block the diffusion path of high-frequency electromagnetic radiation generated by the power circuit on the power circuit board 4 to the signal acquisition area, reducing signal interference. At the same time, the folded edge, through geometric optimization, significantly improves the out-of-plane stiffness of the metal mounting plate 5, suppressing the impact of vibration deformation on onboard components. In addition, the folded edge provides a physical boundary for the spatial division between the power board and the signal board, assisting in the construction of a dual-functional area for layered heat dissipation and electromagnetic isolation.

[0065] As described above, the folded shielding part 54 achieves electromagnetic interference isolation, structural mechanical reinforcement and inter-board space planning through integrated design: it not only solves the electromagnetic compatibility problem between power circuits and signal circuits, but also enhances the mechanical reliability of the metal mounting plate, and lays the foundation for the implementation of functions such as inter-board heat dissipation layout and wiring planning, and ultimately supports the stable coexistence and collaborative operation of multiple circuit modules in the attitude control box.

[0066] like Figure 4 As shown, the metal mounting plate 5 has concave edge notch structures 55 at both ends along its width direction to avoid interference with the installation space of the inlet filter assembly 9 and the outlet fan assembly 10. Specifically, the edge notch structures 55 are symmetrically distributed at both ends of the metal mounting plate 5 along its length direction. The depth of the concavity matches the protruding contours of the inlet filter assembly 9 and the outlet fan assembly 10, and its width covers the projection range of the assembly in the width direction of the housing. This structure, through local contour adjustment, ensures that when the metal mounting plate 5 is installed along the length direction of the housing, the edges at both ends will not physically contact the housing of the fan or filter assembly, while maintaining the structural integrity of the mounting plate body and ensuring that the functions of the perforation array 51 and the hollow structure 53 are not affected. More importantly, the concave design reduces the non-functional length occupied at both ends of the mounting plate, and the saved space is incorporated into the installation area of ​​the signal acquisition circuit board 7. This allows the 16-channel equal-length acquisition board to make fuller use of the effective space along the length direction of the housing without shortening the installation length to avoid the end components, ensuring the complete fixation and functional coverage of the multi-channel acquisition board.

[0067] As described above, the edge notch structure 55, through precise space avoidance design, ensures a compact layout of the metal mounting plate 5 and functional components, eliminates the risk of installation interference between different components, expands the effective installation length space for the multi-channel signal acquisition board, provides a structural foundation for the passage of the straight convection air duct, and further improves the rationality of the utilization of the internal space of the enclosure and the compatibility of the assembly of various components.

[0068] like Figure 2 and Figure 3As shown, the signal conversion circuit board 6 is located on the edge of the metal mounting plate 5 near the first functional area 12, and its signal output terminal faces the control circuit board 3.

[0069] Specifically, the signal conversion circuit board 6 is fixed to the pre-drilled mounting holes on the edge of the metal mounting plate 5 by four M2.5 screws, 5mm from the side edge of the mounting plate. Its signal output terminal uses a 26-pin board-to-board connector with a pin pitch of 1.27mm, facing the corresponding interface of the control circuit board 3. The two are connected by a 150mm long shielded ribbon cable, which runs parallel to the airflow direction of the central main air duct S0 to avoid interference with the heat dissipation airflow.

[0070] As described above, the edge layout and orientation design of the signal conversion circuit board 6 shortens the signal transmission path with the control circuit board 3, reduces electromagnetic interference by utilizing the shielding environment of the metal mounting plate 5, and avoids airflow obstruction in the main air duct, thus achieving dual optimization of signal conversion efficiency and system integration.

[0071] The above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic bearing control box, characterized in that, include: The main body (1) has a detachable top cover (11) on the top. The first functional area (12) is located on the first side inside the box and extends along the length of the box, and is equipped with a drive circuit board (2) and a control circuit board (3). The second functional area (13) is located on the second side of the enclosure opposite to the first side and extends along the length of the enclosure. It is equipped with a power circuit board (4) and a metal mounting plate (5). The metal mounting plate (5) is arranged along the length of the enclosure and has a hole array (51) distributed along the length direction. The length of the hole array (51) covers the mounting hole distribution range of at least two different channel number signal acquisition circuit boards (7). The metal mounting plate (5) is equipped with a signal conversion circuit board (6) and a removable and replaceable signal acquisition circuit board (7) through detachable fasteners (52) and the hole array (51). The signal acquisition circuit board (7) is arranged along the length of the enclosure. An opening (14) is located on the long side of the housing (1) near the signal conversion circuit board (6), and a removable and replaceable label plate (8) is installed thereon. The label plate (8) is positioned corresponding to the signal acquisition circuit board (7) and has through holes (81) that match the number of channels of the current acquisition board.

2. The magnetic bearing control box according to claim 1, characterized in that, The signal acquisition circuit board (7) is an eight-channel magnetic bearing signal acquisition board or a sixteen-channel magnetic bearing signal acquisition board.

3. A magnetic bearing control box according to claim 1, characterized in that, The length of the opening (14) is not less than the maximum length of the signal acquisition circuit board (7).

4. A magnetic bearing control box according to claim 1, characterized in that, On the two opposite short sides of the main body (1), at least one air inlet filter assembly (9) is provided on one side and at least one air outlet fan assembly (10) is provided on the other side to form a straight convection air duct that runs through the body.

5. A magnetic bearing control box according to claim 4, characterized in that, The first functional area (12) is arrayed with a first set of vertically installed hollow isolation columns (12a), which are suspended from bottom to top. Stacking The drive circuit board (2) and the control circuit board (3) form a first-level space (S1) between them; the second functional area (13) is arrayed with a second set of vertically installed hollow isolation columns (13a), and the power circuit board (4) and the metal mounting plate (5) are stacked on top of each other from bottom to top, forming a second-level space (S2) between them; the extension directions of the first-level space (S1) and the second-level space (S2) are both parallel to the airflow direction of the straight convection duct.

6. A magnetic bearing control box according to claim 1, characterized in that, The first functional area (12) and the second functional area (13) are located on opposite sides of the main body (1), and a middle main air duct (S0) extending along the length of the body is formed between them; the middle main air duct (S0) is connected to the straight convection air duct formed by the air inlet filter assembly (9) and the air outlet fan assembly (10).

7. A magnetic bearing control box according to claim 1, characterized in that, The metal mounting plate (5) has a hollow structure (53) extending along the length direction. The length of the hollow structure (53) is 3 / 4 of the length of the metal mounting plate (5) and is located directly below the signal acquisition circuit board (7).

8. A magnetic bearing control box according to claim 1, characterized in that, The edge of the metal mounting plate (5) extends toward the power circuit board (4) to form a folded shield (54).

9. A magnetic bearing control box according to claim 1, characterized in that, The metal mounting plate (5) has concave edge notch structures (55) at both ends to avoid interference in the installation space of the air inlet filter assembly (9) and the air outlet fan assembly (10).

10. A magnetic bearing control box according to claim 1, characterized in that, The signal conversion circuit board (6) is located on the edge of the metal mounting plate (5) near the first functional area (12), and its signal output terminal faces the control circuit board (3).

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