Controller for magnetic suspension motor and magnetic suspension equipment

Abstract

The controller comprises a housing, and a support frame, a driving plate, a main control board and a communication board which are arranged in the housing, the support frame is arranged at one end of the housing, an accommodating space is arranged in the support frame, the driving plate extends along the X-axis direction and is fixed at the bottom of the housing, and the main control board is arranged in the housing. Part of the driving board is located in the containing space, the main control board extends in the Y-axis direction and is located in the containing space, the main control board is fixedly connected with the supporting frame, the communication board extends in the Y-axis direction and is located in the containing space, the communication board is fixedly connected with the supporting frame, the driving board is electrically connected with the main control board, and the main control board is electrically connected with the communication board. The supporting frame is arranged in the shell, the driving board, the main control board and the communication board are positioned through the supporting frame, the supporting frame is additionally arranged, the positions of all the boards in the shell are convenient to fix and install, the communication board does not need to be partially exposed out of the shell, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of controllers, in particular to a controller for a magnetic suspension motor and a magnetic suspension device. Background Art

[0002] A magnetic levitation motor is a magnetic levitation rotary drive that uses magnetic field force to suspend the rotor so that there is no mechanical contact between the rotor and the stator. The magnetic levitation motor can be a magnetic bearing motor, a bearingless motor, or a bearingless thin-film motor, etc.

[0003] A magnetic bearing motor, also known as a magnetic bearing, is a motor that combines a rotary drive motor with an axial magnetic bearing or / and a radial magnetic bearing or / and an axial-diameter hybrid magnetic bearing instead of integrating them together.

[0004] A bearingless motor is a motor that integrates motor rotation and suspension functions. A bearingless motor has an additional set of windings on top of the windings that generate a rotating drive magnetic field to generate an excitation magnetic field. The interaction between the two magnetic fields breaks the balanced distribution of the original drive magnetic field, thereby generating a radial force acting on the rotor. The rotor is suspended by controlling the radial force in the motor. Compared with a magnetic bearing motor, the magnetic suspension winding of a bearingless motor is wound on the stator and does not occupy additional radial space, which to a certain extent overcomes the shortcomings of large size and high cost of magnetic bearings. In order to achieve suspension of the motor rotor in five degrees of freedom, early bearingless motors generally required two bearingless motors and one axial magnetic bearing.

[0005] The bearingless thin-film motor is a special bearingless motor that inherits the advantages of bearingless motors. The axial length to diameter ratio of the rotor is very small and it is in the shape of a thin film, eliminating the axial magnetic bearing. The bearingless technology is used to realize the rotation of the rotor and the active suspension in the radial direction. The magnetic circuit formed by the mechanical structure is used to realize the passive suspension of the other three degrees of freedom except the radial and rotor rotation degrees of freedom. It has the characteristics of high cleanliness, no precipitation, no particles, no dynamic seal, and excellent performance. It has good application prospects in ultra-pure drive fields such as biochemistry, medical treatment, and semiconductor manufacturing.

[0006] Unless otherwise specified, the term magnetic levitation motor refers to a magnetic levitation rotary drive that uses magnetic field force to suspend the rotor so that there is no mechanical contact between the rotor and the stator.

[0007] The magnetic levitation motor is integrated with various sensors and sensor circuits, and a signal conditioning module that adjusts and processes the sensor signal containing control data output by the sensor. The sensor, sensor circuit and signal conditioning module constitute a sensor module. The control data of the magnetic levitation motor can be detected in real time through the sensor module. The control data can include, for example, rotor displacement data, rotor angle data (rotor speed data) or electromagnetic coil current data. With the control data as feedback, the magnetic levitation motor controller generates a control signal for the power amplifier as the execution part according to the control strategy. The power amplifier outputs current to excite the electromagnetic coil of the stator part of the magnetic levitation motor to achieve the suspension and / or rotation control of the rotor.

[0008] The existing controller for magnetic levitation motor includes a controller housing, a drive board and a main control board are arranged in the controller housing, and the positions of the drive board and the main control board in the housing need to be fixed by the housing, that is, the two ends of the drive board and the main control board are connected to the housing, and the drive board and the main control board need to be fixed separately on the controller housing. However, since the existing controller housing is a multi-piece splicing structure, the size of the part of the controller housing where the drive board and the main control board are placed is large, and the position of the drive board and the main control board in the housing is not convenient for positioning, the assembly is more troublesome, and the assembly efficiency is also low; and the communication board is fixed on the outside of the controller housing, the communication board is fixed on the card connector component, and then the card connector is connected to the controller housing. This fixing method not only requires the corresponding card slot to be set for the part of the controller housing that is connected to the communication board, but also during the transportation or use of the controller, the communication board that is partially exposed to the outside is very likely to be collided and partially or completely damaged, which greatly shortens the service life of the communication board and increases the use cost of the communication board. In addition, since the side panels of the controller housing have a multi-bending structure, the side panels need to be fixed at multiple points on the controller housing. The fixing method is relatively cumbersome, making the controller housing as a whole difficult to assemble. The assembly takes a long time, requires a lot of manpower and time costs, and is not conducive to mass production of the controller. Utility Model Content

[0009] In order to overcome the defects in the prior art, the embodiments of the present invention provide a controller for a magnetic levitation motor and a magnetic levitation device, which are used to solve at least one of the above problems.

[0010] The embodiment of the present application discloses a controller for a magnetic levitation motor and a magnetic levitation device, wherein a driving board, a main control board and a communication board of the controller are all arranged in a shell, and a support frame is arranged in the shell. The support frame serves as an intermediate connecting piece, and the driving board, the main control board and the communication board are all fixed on the support frame, so that the positions of the driving board, the main control board and the communication board are positioned by the support frame, and the connection points are all arranged on the support frame. The driving board, the main control board and the communication board are fixed to the support frame as an integrated structure. Adding the support frame not only makes it easier to fix the positions of the driving board, the main control board and the communication board in the shell, but also facilitates installation. At the same time, there is no connection point on the surface of the shell of the controller, which makes the controller more beautiful as a whole, and there is no need for the communication board to be partially exposed outside the shell, thereby improving the service life of the communication board and reducing the use cost caused by frequent replacement of the communication board.

[0011] Among them, the controller for the magnetic levitation motor described in the present application, the magnetic levitation motor includes a stator and a rotor, the controller includes a shell and a support frame, a drive board, a main control board and a communication board arranged in the shell, the support frame is arranged at one end of the shell, the interior of the support frame is configured as a accommodating space, the drive board extends along the X-axis direction and is fixed on the bottom of the shell, part of the drive board is located in the accommodating space and is fixedly connected to the support frame, the main control board extends along the Y-axis direction and is located in the accommodating space, the main control board is arranged above the drive board and is fixedly connected to the support frame, the communication board extends along the Y-axis direction and is located in the accommodating space, the communication board is arranged on one side of the main control board and is fixedly connected to the support frame, wherein the drive board is electrically connected to the main control board, and the main control board is electrically connected to the communication board.

[0012] Furthermore, the support frame includes a first support plate extending in the axial direction, a second support plate and a third support plate extending in the radial direction and arranged opposite to each other, and the first support plate is fixedly connected between the second support plate and the third support plate.

[0013] Furthermore, the shell includes a first shell, a second shell, a first side wall and a second side wall, the opening of the first shell is radially engaged with the opening of the second shell, and the first side wall and the second side wall are respectively covered on both sides of the first shell and the second shell that are engaged together.

[0014] Furthermore, the two radial side walls of the first shell are fixedly connected to the second support plate and the third support plate respectively, the side walls of the first shell along the axial direction are fixedly connected to the first support plate, and the two radial side walls of the second shell are fixedly connected to the second support plate and the third support plate respectively.

[0015] Furthermore, the two ends of the driving board along the X-axis direction are respectively fixedly connected to the bottom of the shell and the third support plate, the two ends of the main control board along the Y-axis direction are respectively fixedly connected to the driving board and the second support plate, the communication board is fixedly connected to the first support plate, and / or the two ends of the communication board along the Y-axis direction are clamped in the second support plate and the third support plate.

[0016] Furthermore, the controller also includes at least one heat dissipation unit, which is disposed in the housing. A plurality of power elements are disposed on the driving board, and the heat dissipation unit is configured above the power elements to dissipate heat from the power elements.

[0017] Furthermore, the heat dissipation unit includes a heat dissipation cover, a plurality of heat dissipation fins, and a heat dissipation cover plate. The top of the heat dissipation cover is open, and the bottom of the heat dissipation cover abuts against the upper surfaces of the plurality of power elements. The inner wall of the heat dissipation cover is provided with a plurality of protrusions, and the bottom wall of the heat dissipation cover is provided with a plurality of grooves arranged in rows and spaced apart. A heat dissipation fin is correspondingly embedded in each of the grooves, and the heat dissipation cover plate is covered above the plurality of heat dissipation fins and clamped on the top of the heat dissipation cover.

[0018] Furthermore, each of the heat dissipation fins is provided with an air duct, the outer edge and inner wall of the heat dissipation fin are provided with a plurality of protrusions, and the heat dissipation fin is provided with a horizontal plate fixedly connected to the inner wall on both sides thereof.

[0019] Furthermore, the heat dissipation unit further comprises at least one fan, and a portion of the housing corresponding to the heat dissipation unit is provided with a first through hole and a second through hole, wherein the first through hole and the second through hole are arranged opposite to each other.

[0020] Furthermore, the fan is configured as an axial flow fan, at least one axial flow fan is configured at the end of the heat dissipation fin along the Z-axis direction and fixed on the heat dissipation cover, the first through hole is configured as the air inlet / air outlet of the fan, and the second through hole is configured as the air outlet / air inlet of the fan, wherein the air inlet direction and the air outlet direction are both along the axial direction of the axial flow fan.

[0021] Furthermore, the fan is configured as a centrifugal fan, at least one centrifugal fan is configured inside the heat dissipation fins and fixed on the heat dissipation cover, the axial direction of the centrifugal fan is configured as the air inlet direction, and the direction perpendicular to the axial direction is configured as the air outlet direction, and a third through hole is configured on the surface of the second shell corresponding to the centrifugal fan, the third through hole is configured as the air inlet / air outlet of the centrifugal fan, and the first through hole and the second through hole are configured as the air outlet / air inlet of the centrifugal fan.

[0022] Furthermore, a fourth through hole is provided on the first shell, and the controller also includes a display screen unit, which corresponds to the fourth through hole. The display screen unit includes a display screen keypad, which is axially arranged on a side of the main control board adjacent to the communication board, and is fixedly connected to the first support plate. A plurality of spaced-apart buttons, a display screen and a plurality of spaced-apart indicator lights are provided on the side of the display screen keypad adjacent to the first support plate, and are correspondingly embedded in the button holes, display screen holes and indicator light holes on the first support plate.

[0023] Furthermore, the display screen unit also includes a display panel, and the display panel is arranged in a receiving space formed by the first through hole and the first supporting plate.

[0024] Furthermore, a fifth through hole is provided on the first support plate, a driving board connecting terminal is provided on the driving board, a plurality of main control board connecting terminals are provided on the main control board, a communication board connecting terminal is provided on the communication board, and a display screen key board connecting terminal is provided on the display screen key board, and the fifth through hole is configured as an operating area to enable the main control board connecting terminal to be respectively connected to the driving board connecting terminal, the communication board connecting terminal, and the display screen key board connecting terminal.

[0025] Furthermore, a wire harness fixing plate is provided on one side of the shell, and the wire harness fixing plate is configured in an L shape. One side of the wire harness fixing plate is fixed on the first side wall or the second side wall, and the other side is flush with the bottom of the shell. The wire harness fixing plate is configured with multiple wire harness fixing holes.

[0026] Furthermore, a mounting plate is fixedly connected to the side wall of the second shell, and a portion of the mounting plate higher than the second shell is provided with at least two mounting holes; or, at least one guide rail buckle is provided on the side wall of the second shell.

[0027] The present application also discloses a magnetic levitation device, including a magnetic levitation motor and a controller for the magnetic levitation motor.

[0028] The beneficial effects of the utility model are as follows:

[0029] The driving board, main control board and communication board of the controller are all arranged in the shell, and a support frame is arranged in the shell. The support frame serves as an intermediate connecting piece. The driving board, main control board and communication board are all fixed on the support frame, so that the positions of the driving board, main control board and communication board are positioned by the support frame. The connection points are all arranged on the support frame. The driving board, main control board and communication board are fixed to the support frame as an integrated structure. Adding the support frame not only makes it easier to fix the positions of the driving board, main control board and communication board in the shell, but also facilitates installation. At the same time, there is no connection point on the surface of the shell of the controller, which makes the controller more beautiful as a whole. In addition, there is no need for the communication board to be partially exposed outside the shell, which improves the service life of the communication board and reduces the use cost caused by frequent replacement of the communication board.

[0030] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is an exploded view of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0033] Figure 2 It is an exploded view of the housing and the support frame of the controller for the magnetic levitation motor in the embodiment of the utility model;

[0034] Figure 3 It is a structural schematic diagram of the housing and the support frame of the controller for the magnetic levitation motor in the embodiment of the utility model;

[0035] Figure 4 It is a structural schematic diagram of a support frame of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0036] Figure 5 It is a structural schematic diagram of a driving board of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0037] Figure 6 It is a front view of the overall structure of the drive board, the main control board, the communication board and the support frame in the embodiment of the utility model;

[0038] Figure 7 This is an exploded view of an embodiment of an integrated heat dissipation unit inside a controller for a magnetic levitation motor in an embodiment of the utility model;

[0039] Figure 8 This is a front view of the overall structure of the drive board and the heat dissipation unit of the controller for the magnetic levitation motor in the embodiment of the utility model;

[0040] Fig. 9 It is a structural schematic diagram of an embodiment of a fan in a heat dissipation unit of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0041] Fig.10 It is a structural schematic diagram of a first viewing angle of an embodiment of a heat dissipation unit of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0042] Fig.11 It is a structural schematic diagram of a heat dissipation unit of a controller for a magnetic levitation motor in an embodiment of the utility model from a second viewing angle;

[0043] Fig.12 It is a structural schematic diagram of another embodiment of a fan in a heat dissipation unit of a controller for a magnetic levitation motor in an embodiment of the utility model;

[0044] Fig.13 It is a structural schematic diagram of another embodiment of a fan in a heat dissipation unit of a controller for a magnetic levitation motor in an embodiment of the utility model from a first viewing angle;

[0045] Fig.14 It is a structural schematic diagram of a display screen keypad in a controller for a magnetic levitation motor in an embodiment of the utility model;

[0046] Fig.15 It is a structural schematic diagram of a display screen unit in a controller for a magnetic levitation motor in an embodiment of the utility model;

[0047] Fig.16 It is a schematic diagram of the structure of the electrical connection between the driving board, the main control board, the communication board and the display screen key board in the embodiment of the utility model;

[0048] Fig.17 yes Fig.16 The enlarged view of point A in the middle;

[0049] Fig.18 It is a structural schematic diagram of an embodiment of installing a wiring harness fixing plate and a fixing plate on a controller for a magnetic levitation motor in an embodiment of the utility model;

[0050] Fig.19 It is a structural schematic diagram of another embodiment of installing a fixing plate on a controller for a magnetic levitation motor in an embodiment of the utility model.

[0051] Reference numerals of the above drawings: 1, controller; 10, housing; 11, first housing; 111, fourth through hole; 12, second housing; 121, third through hole; 13, first side wall; 131, first through hole; 14, second side wall; 141, second through hole;

[0052] 20. Support frame; 21. First support plate; 22. Second support plate; 23. Third support plate; 24. Fifth through hole;

[0053] 30. drive board; 31. power element; 32. drive board connection terminal; 40. main control board; 41. main control board connection terminal; 50. communication board; 51. communication board connection terminal;

[0054] 60, heat dissipation unit; 61, heat dissipation cover; 62, heat dissipation fin; 621, air duct; 622, horizontal plate; 63, heat dissipation cover; 64, axial flow fan; 65, centrifugal fan; 66, groove; 67, protrusion;

[0055] 70. Display screen unit; 71. Display screen keypad; 72. Keypad; 73. Display screen; 74. Indicator light; 75. Display panel; 76. Display screen keypad connection terminal;

[0056] 80. Soft wire; 90. Wire harness fixing plate; 100. Mounting fixing plate; 110. Guide rail buckle unit. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions, for example, a system, product or device including a series of units is not necessarily limited to those units clearly listed, but may include other units that are not clearly listed or inherent to these products or devices.

[0059] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0060] The drawings in this disclosure are not drawn strictly according to the actual scale, and the specific size and quantity of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic diagrams.

[0061] In the prior art, the controller for the magnetic levitation motor includes a controller housing, a drive board and a main control board are arranged in the controller housing, and the positions of the drive board and the main control board in the housing need to be fixed by the housing, that is, the two ends of the drive board and the main control board are connected to the housing, and the drive board and the main control board need to be fixed separately on the controller housing. However, since the existing controller housing is a multi-piece splicing structure, the size of the part of the controller housing where the drive board and the main control board are placed is large, the position of the drive board and the main control board in the housing is not convenient for positioning, the assembly is more troublesome, and the assembly efficiency is also low; and the communication board is fixed on the outside of the controller housing, the communication board is fixed on the card connector component, and then the card connector is connected to the controller housing. This fixing method not only requires the corresponding card slot to be set for the part of the controller housing that connects the communication board, but also during the transportation or use of the controller, the communication board that is partially exposed to the outside is very likely to be collided and partially or completely damaged, which greatly shortens the service life of the communication board and increases the use cost of the communication board. In addition, since the side panels of the controller housing have a multi-bending structure, the side panels need to be fixed at multiple points on the controller housing. The fixing method is relatively cumbersome, making the controller housing as a whole difficult to assemble. The assembly takes a long time, requires a lot of manpower and time costs, and is not conducive to mass production of the controller.

[0062] In order to solve the above problems, the utility model provides a controller for a magnetic levitation motor and a magnetic levitation device, a driving board, a main control board and a communication board of the controller are all arranged in an outer shell, and a support frame is arranged in the outer shell, the support frame serves as an intermediate connecting piece, the driving board, the main control board and the communication board are all fixed on the support frame, so that the positions of the driving board, the main control board and the communication board are positioned by the support frame, the connection points are all arranged on the support frame, the driving board, the main control board and the communication board are fixed to the support frame as an integrated structure, adding the support frame not only makes it easier to fix the positions of the driving board, the main control board and the communication board in the outer shell, but also facilitates installation, while there is no connection point on the outer shell surface of the controller, making the controller more beautiful as a whole, and the communication board does not need to be partially exposed outside the outer shell, thereby improving the service life of the communication board and reducing the use cost caused by frequent replacement of the communication board.

[0063] In order to make the technicians in this technical field better understand the present utility model scheme, refer to the following Figure 1-19 The utility model is further described in detail with specific implementation methods.

[0064] According to an embodiment of the utility model, the utility model proposes a controller for a magnetic levitation motor, the magnetic levitation motor includes a stator and a rotor, and the controller 1 is used to adjust the suspension position and rotation position of the rotor. The controller 1 includes a housing 10 and a support frame 20, a drive board 30, a main control board 40 and a communication board 50 arranged in the housing 10, and the support frame 20 is arranged at one end of the housing 10. The interior of the support frame 20 is configured as a receiving space, the drive board 30 extends along the X-axis direction and is fixed on the bottom of the housing 10, part of the drive board 30 is located in the receiving space and is fixedly connected to the support frame 20, the main control board 40 extends along the Y-axis direction and is located in the receiving space, the main control board 40 is arranged above the drive board 30 and is fixedly connected to the support frame 20, the communication board 50 extends along the Y-axis direction and is located in the receiving space, the communication board 50 is arranged on one side of the main control board 40 and is fixedly connected to the support frame 20, wherein the drive board 30 is electrically connected to the main control board 40, and the main control board 40 is electrically connected to the communication board 50.

[0065] Specific reference Figure 1 In this embodiment, the magnetic suspension motor includes a stator and a rotor. The controller 1 is used to adjust and control the suspension position of the rotor so that a stable gap is maintained between the rotor and the stator, thereby ensuring the stable suspension of the rotor. The rotor in the magnetic suspension motor can be an integral rotor. For example, in the application of the magnetic suspension pump, the rotor is both the rotor of the magnetic suspension motor and the rotor of the magnetic suspension pump, and can be, for example, a permanent magnet rotor or a short-circuit cage rotor or a reluctance rotor. The stator in the magnetic suspension motor is designed as a bearing and a driving stator, including a stator core and a suspension coil and a rotating coil wound on the stator core. The stator is both a rotationally driven stator and a magnetically suspended stator. The controller 1 includes a housing 10 and a support frame 20, a drive board 30, a main control board 40 and a communication board 50 arranged in the housing 10. The support frame 20 is arranged at one end of the housing 10. Further, the support frame 20 is closely fitted with at least three inner wall surfaces of the housing 10, that is, the support frame 20 includes at least three side walls, and the three side walls are fixedly connected to the inner wall surface of the housing 10. The support frame 20 can be configured as a U-shaped opening structure, and the interior of the opening of the support frame 20 is configured as a receiving space. The driving plate 30 is fixed to the bottom of the housing 10 along the X-axis direction. The X-axis direction is Figure 6 or Fig. 9The X direction of the drive board 30. Part of the drive board 30 is located in the accommodation space and is fixedly connected to the support frame 20, that is, one side of the drive board 30 along the X-axis direction is fixed to the bottom of the housing 10, and the other side along the X-axis direction is fixed to the bottom of the support frame 20. The main control board 40 extends along the Y-axis direction and is located in the accommodation space. The main control board is arranged above the drive board 30 and is fixedly connected to the support frame. The Y-axis direction is Figure 6 or Fig. 9 The Y direction in the diagram. The main control board 40 is fixedly connected to the drive board 30 at the bottom along the axial direction, and the main control board 40 is fixedly connected to the support frame 20 at the top along the axial direction. The communication board 50 is axially arranged in the accommodating space. The communication board 50 is located between the main control board 40 and one end of the outer shell 10. From the perspective of normal use, the communication board 50 is located on the left side of the main control board 40. The communication board 50 is fixedly connected to the support frame 20, and the connection method can be that the communication board 50 is connected to the support plate at the top and bottom along the axial direction, and / or one side of the communication board 50 is fixedly connected to the support frame 20. In the controller 1 of the present application, the main control board 40 is fixedly connected to the drive board 30 to achieve electrical connection between the drive board 30 and the main control board 40; the main control board 40 and the communication board 50 are electrically connected by a soft wire 80 or a board-to-board connection. The driving board 30, the main control board 40 and the communication board 50 of the controller 1 are all arranged in the shell 10, and a support frame 20 is arranged in the shell 10. The support frame 20 serves as an intermediate connecting piece, and the driving board 30, the main control board 40 and the communication board 50 are all fixed on the support frame 20, so that the positions of the driving board 30, the main control board 40 and the communication board 50 are positioned by the support frame 20, and the driving board 30, the main control board 40 and the communication board 50 are fixed to the support frame 20 as an integrated structure. Adding the support frame 20 not only makes it easier to fix the positions of the driving board 30, the main control board 40 and the communication board 50 in the shell 10, but also facilitates installation. At the same time, there is no connection point on the surface of the shell 10 of the controller 1, making the controller 1 more beautiful as a whole.

[0066] Specific reference Figure 4In this embodiment, the support frame 20 is one of the innovative points of the utility model. The support frame 20 includes a first support plate 21 extending in the axial direction, a second support plate 22 and a third support plate 23 extending in the radial direction and arranged opposite to each other. The first support plate 21 is fixedly connected between the second support plate 22 and the third support plate 23. Further, the two radial side walls of the first shell 11 are fixedly connected to the second support plate 22 and the third support plate 23 respectively. The side wall of the first shell 11 in the axial direction is fixedly connected to the first support plate 21. The two radial side walls of the second shell 12 are fixedly connected to the second support plate 22 and the third support plate 23 respectively. The side walls of the first shell 11 and the second shell 12 on the same radial plane are fixedly connected through the second support plate 22 or the third support plate 23, specifically: the side wall at the top of the first shell 11 is fixedly connected to the side wall at the top of the second shell 12 through the second support plate 22, and the side wall at the bottom of the first shell 11 is fixedly connected to the side wall at the bottom of the second shell 12 through the third support plate 23, so that the first shell 11 and the second shell 12 are fixedly connected as an integral structure.

[0067] Specific reference Figure 2 and Figure 3 In this embodiment, the housing 10 includes a first shell 11, a second shell 12, a first side wall 13 and a second side wall 14. Preferably, in this embodiment, the first shell 11 and the second shell 12 are U-shaped, that is, the first shell 11 and the second shell 12 are both configured to have an opening structure, and the first shell 11 and the second shell 12 both have three side walls, specifically, the first shell 11 includes two side walls extending in the radial direction and one side wall extending in the axial direction, the two side walls are arranged opposite to each other in the axial direction, and the axial side wall is fixed to the two radial side walls. Similarly, the structure of the second shell 12 is consistent with that of the first shell 11, and the length of the two radial side walls of the second shell 12 is greater than the length of the two radial side walls of the first shell 11. The opening of the first shell 11 and the opening of the second shell 12 are buckled together in the radial direction, specifically, the radial side walls of the first shell 11 and the radial side walls of the second shell 12 are abutted. The first side wall 13 and the second side wall 14 are respectively covered on both sides of the first shell 11 and the second shell 12 that are buckled together, so that the housing 10 of the controller 1 forms an enclosing structure. The housing of this structure is more convenient to install, saving assembly time, thereby improving the overall assembly efficiency of the controller.

[0068] Specific reference Figure 5In this embodiment, one end of the driving plate 30 along the X-axis direction is fixedly connected to the third support plate 23, and the other end of the driving plate 30 along the X-axis direction is connected to the bottom of the housing 10. A buckle is provided on one side of the driving plate 30 along the X-axis direction, and a slot is provided at a corresponding position on the third support plate 23. The buckle is inserted into the slot to achieve fixed connection between the driving plate 30 and the third support plate 23. The other side of the driving plate 30 along the X-axis direction can also be fixedly connected to the bottom of the housing 10 by a buckle, or by a fastener.

[0069] Specific reference Figure 6 In this embodiment, the two ends of the main control board 40 along the Y-axis direction are fixedly connected to the driving board 30 and the second support board 22 respectively. Buckles are provided on the two ends of the main control board 40 along the Y-axis direction, and corresponding positions on the second support board 22 and the driving board 30 are provided with card slots. The buckles are inserted into the card slots to achieve fixed connection between the main control board 40 and the driving board 30 and the second support board 22. The main control board 40 is located above the driving board 30, so as to facilitate the lead-out of the soft wire 80 on the main control board 40, so as to achieve electrical connection between the main control board 40 and the driving board 30, and electrical connection between the main control board 40 and the communication board 50, so as to realize the main control board 40 to provide signaling processing and resource management functions for other boards. For details, refer to Figure 6 In this embodiment, there are three ways to connect the communication board 50 and the support frame 20, specifically: the first way: the communication board 50 is fixedly connected to the first support plate 21, and the inner wall of the first support plate 21 is provided with a plurality of fasteners, and the fixed connection with the communication board 50 is achieved through the fasteners. The second way: the two ends of the communication board 50 along the Y-axis direction are clamped in the second support plate 22 and the third support plate 23, specifically, the communication board 50 is provided with buckles on both sides along the axial direction, and the second support plate 22 and the third support plate 23 are provided with slots at corresponding positions, and the buckles are inserted into the slots to achieve fixed connection. The third way: the first and second connection methods are combined together to achieve a more stable connection between the communication board 50 and the support frame 20. Those skilled in the art can select a specific connection method according to actual needs. It should be noted that in the above embodiments, the buckle can be square, rectangular or trapezoidal, preferably trapezoidal, and the corresponding slot is also trapezoidal. The connection stability between the trapezoidal buckle and the slot is better than that of the square and rectangular buckles, so as to ensure a more stable connection between the driving board 30, the main control board 40 and the communication board 50 and the support frame 20, thereby ensuring the stable operation of the controller 1.

[0070] Specifically, in this embodiment, a plurality of power elements 31 are provided on the driving board 30. Preferably, the plurality of power elements 31 are arranged on a side of the driving board 30 away from the support plate and are arranged in rows and spaced apart. In this application, the plurality of power elements 31 are configured as three power elements 31, and the three power elements 31 are arranged in rows and spaced apart on a side of the driving board 30 away from the support plate. As a high-power electronic device used in power conversion and power control circuits, the power element 31 is usually accompanied by a large amount of heat generation during operation, resulting in a high heat of the power element 31 itself, and there is a problem of being easily damaged due to excessive temperature. Therefore, it is often necessary to dissipate heat for the power element 31. In this embodiment, a heat dissipation unit 60 is provided to dissipate heat for the power element 31. The heat dissipation unit 60 is provided in the housing 10. In this embodiment, the number of heat dissipation units can be 1 or 2, including but not limited to this. The number of heat dissipation units is specifically configured according to the power of the controller to ensure that the heat dissipation unit can dissipate heat for the power element well. In this embodiment, the number of heat dissipation units is preferably 1. Furthermore, the heat dissipation unit 60 is disposed above the power element 31 to dissipate heat from the power element 31 .

[0071] Reference Figure 7-Figure 13 , all of which are described by taking one heat dissipation unit as an example. Further, the heat dissipation unit 60 includes a heat dissipation cover 61, a plurality of heat dissipation fins 62, and a heat dissipation cover plate 63. The top of the heat dissipation cover 61 is open. The length of the heat dissipation cover 61 is greater than or equal to the length of the plurality of power elements 31, and the width of the heat dissipation cover 61 is greater than or equal to the width of the power elements 31. The bottom of the heat dissipation cover 61 abuts against the upper surfaces of the plurality of power elements 31, so that the heat of the power elements 31 can be transferred from the bottom of the heat dissipation cover 61 in contact with it to the heat dissipation unit 60, so as to take away the heat of the power elements 31 and cool the power elements 31. A plurality of protrusions 67 are provided on the inner side wall of the heat dissipation cover 61, and the surface area of ​​the heat dissipation cover 61 is increased by providing a plurality of protrusions 67, thereby increasing the heat dissipation area and improving the heat dissipation efficiency. A plurality of grooves 66 arranged in rows and intervals are provided on the bottom wall of the heat dissipation cover 61, and a heat dissipation fin 62 is correspondingly embedded in each groove 66. The length of the groove 66 is equal to or less than the length of the heat dissipation cover 61, and is preferably equal to the length of the heat dissipation cover 61, so that a larger-sized heat dissipation fin 62 can be inserted. Further, the length of the heat dissipation fin 62 is less than or equal to the length of the groove 66, and is preferably equal to the length of the heat dissipation fin 62, so as to ensure that the size of the heat dissipation fin 62 is large enough to increase the heat dissipation area, thereby improving the heat dissipation efficiency. The heat dissipation cover 63 is provided above the plurality of heat dissipation fins 62. The top of the heat dissipation cover 61 is provided with a card slot on both sides, and the heat dissipation cover 63 is carded in the card slot to enclose the heat dissipation fin 62 in a closed space to ensure the heat dissipation effect of the heat dissipation unit 60.

[0072] Specific reference Figure 8Further, the structure of the heat dissipation fin 62 is configured to have a V-shaped bottom, a vertical middle part and a straight upper part. The V-shaped bottom is inserted into the groove 66 of the heat dissipation cover 61. The interior of the vertical middle part has a preset space, and the preset space is configured as the air duct 621 of the heat dissipation fin 62. The airflow enters or passes through the air duct 621. The outer edge and inner wall of the heat dissipation fin 62 are provided with a plurality of protrusions 67. By providing a plurality of protrusions 67, the surface area of ​​the heat dissipation cover 61 is increased, thereby increasing the heat dissipation area and improving the heat dissipation efficiency. The heat dissipation fin 62 is provided with a horizontal plate 622 fixedly connected to the inner walls on both sides thereof. The length of the horizontal plate 622 is less than or equal to the length of the heat dissipation fin 62. The axial position of the horizontal plate 622 is not limited, and is preferably the axial middle part of the heat dissipation fin 62. Since the material of the heat dissipation fin 62 is relatively soft, the axial height and radial length of the heat dissipation fin 62 in this embodiment are relatively large. The provision of the horizontal plate 622 can ensure that the heat dissipation fin 62 has high stability in both the radial direction and the axial direction.

[0073] In addition, in order to improve the heat dissipation effect of the heat dissipation fins 62, a preferred embodiment is to arrange a fan around the heat dissipation fins 62. The heat dissipation unit 60 also includes at least one fan, which is used to absorb or discharge air. The first through hole 131 is arranged on the first side wall 13 at a portion corresponding to the heat dissipation unit 60, and the second through hole 141 is arranged on the second side wall 14 at a portion corresponding to the heat dissipation unit 60. The size of the first through hole 131 is less than or equal to the size of the first side wall 13, and the size of the second through hole 141 is less than or equal to the size of the second side wall 14. The openings of the first through hole 131 and the second through hole 141 are linear or coincide with the shape of the fan blades.

[0074] The types and placement of fans mainly include the following three embodiments, as follows:

[0075] Embodiment 1: The fan is configured as an axial flow fan 64. Figure 11-13, at least one axial flow fan 64 is arranged at the end of the heat dissipation fin 62 and fixed on the heat dissipation cover 61. Specifically: in the first embodiment, at least one axial flow fan 64 is configured as an axial flow fan 64, and an axial flow fan 64 is arranged at one end of the heat dissipation fan along the Z-axis direction and fixed on the heat dissipation cover 61. The axial flow fan 64 is arranged at the location of the first side wall 13, and the axial flow fan 64 is configured as a suction fan to suck air into the heat dissipation unit 60. The first through hole 131 is configured as the air inlet of the fan, and the second side wall 14 is configured as the air outlet of the airflow, and the second through hole 141 is configured as the air outlet of the fan. Or, at least one axial flow fan 64 is configured as an axial flow fan 64, and an axial flow fan 64 is arranged at one end of the heat dissipation fan along the radial direction and fixed on the heat dissipation cover 61. The axial flow fan 64 is arranged at the location of the second side wall 14, and the axial flow fan 64 is configured as a suction fan to suck air into the heat dissipation unit 60. The second through hole 141 is configured as the air inlet of the fan, and the first side wall 13 is configured as the air outlet of the air flow, and the first through hole 131 is configured as the air outlet of the fan. Similarly, if the axial flow fan 64 is configured as an exhaust fan, the setting of the air inlet and the air outlet is opposite to the above setting method. In the second embodiment, at least one axial flow fan 64 is configured as two axial flow fans 64, and the two axial flow fans 64 are respectively arranged at both ends of the heat dissipation fan along the X-axis direction and fixed on the heat dissipation cover 61. One of the two axial flow fans 64 is configured as a suction fan, and the other is configured as an exhaust fan. The positions where the suction fan and the exhaust fan are set correspond to the air inlet and the air outlet, respectively, as in the above embodiment. In this embodiment, the air inlet direction and the air outlet direction are both along the axial direction of the axial flow fan, and the airflow enters or is discharged along the axial direction of the axial flow fan 64. The axial flow fan 64 drives the air flow to flow in the axial direction, and the air flow can enter or be discharged from the air duct 621 of the heat dissipation fins 62, so that the flowing air flow takes away the heat of the power element 31, thereby achieving the effect of cooling it.

[0076] Embodiment 2: The fan is configured as a centrifugal fan 65. Fig.12 and Fig.13 , the first embodiment: at least one centrifugal fan 65 is arranged inside the heat dissipation fins 62 and fixed on the heat dissipation cover 61. A accommodating space is provided inside the plurality of heat dissipation fins 62, and the accommodating space can accommodate at least one centrifugal fan 65. The at least one centrifugal fan 65 is configured as one centrifugal fan 65 or two centrifugal fans 65. One centrifugal fan 65 can be placed vertically inside the heat dissipation fins 62, and the axial direction of the centrifugal fan is configured as the air inlet direction, and the direction perpendicular to the axial direction is configured as the air outlet direction. The third through hole 121 is provided on the upper part or the side part of the second housing 12 corresponding to the centrifugal fan 65, such as Fig.13, the third through hole 121 is arranged at the upper part of the second shell 12. The first through hole 131 and the second through hole 141 are configured as the air inlet of the centrifugal fan 65, and the third through hole 121 is configured as the air outlet of the centrifugal fan 65, so the airflow enters from the first through hole 131 and the second through hole 141, and then is discharged from the third through hole 121. Since one side of a centrifugal fan 65 is configured as an air inlet and the other side is configured as an air outlet, most of the airflow will be discharged from the first through hole 131 or the second through hole 141, and only a small amount of airflow will be discharged from the corresponding second through hole 141 or the first through hole 131. The heat dissipation effect of the heat dissipation fin 62 corresponding to this part may be relatively poor. Because, in order to improve the heat dissipation effect of the entire heat dissipation fin 62, the setting position of the centrifugal fan 65 is preferably set at the part of the heat dissipation fin 62 near the end in the Z-axis direction, so that the length of the heat dissipation fin 62 with less airflow passing through is shorter, which can take away the heat of the power element 31 to a greater extent. The second embodiment: at least one centrifugal fan 65 is configured as two centrifugal fans 65, such as Fig.13 , which is a preferred embodiment of this embodiment. Two centrifugal fans 65 are both arranged inside the heat dissipation fins 62. The two centrifugal fans 65 can be placed vertically, and the backs of the two centrifugal fans 65 are close to each other to reduce the required accommodation space inside the heat dissipation fins 62. The heat dissipation cover and the top of the second shell 12 are both provided with corresponding third through holes 121, which serve as air outlets for the centrifugal fans 65. If the two centrifugal fans 65 are both configured as suction fans, the third through hole 121 is configured as an air outlet, and the first through hole 131 and the second through hole 141 correspond to a centrifugal fan 65 respectively, as air inlets, and the airflow directions of the exhaust of the two centrifugal fans 65 are opposite. This scheme can make the airflow inside the air duct 621 of the heat dissipation fin 62 more uniform, thereby making the overall heat dissipation of the power element 31 more sufficient, and cooling the power element 31 to a greater extent. Therefore, this scheme is a preferred implementation scheme. In this embodiment, the air inlet direction and the air outlet direction of the centrifugal fan 65 form an angle of 90°, that is, if the air inlet enters the heat sink fins 62 in the radial direction, the exhaust air flows out from the axial direction of the heat sink fins 62. The airflow driven by the centrifugal fan 65 can enter or be discharged from the air duct 621 of the heat sink fins 62, so that the flowing airflow takes away the heat of the power element 31, thereby achieving the effect of cooling it.

[0077] Embodiment 3: The fan is configured as a centrifugal fan 65. At least one centrifugal fan 65 is configured inside the heat dissipation fins 62 and fixed on the heat dissipation cover 61. A accommodating space is provided inside the plurality of heat dissipation fins 62, and the accommodating space can accommodate at least one centrifugal fan 65. At least one centrifugal fan 65 is configured as one centrifugal fan 65 or two centrifugal fans 65. Taking two centrifugal fans 65 as an example, the two centrifugal fans 65 can be placed horizontally inside the heat dissipation fins, and the two centrifugal fans 65 are stacked in the vertical direction. Under this structure, since the axial direction of the centrifugal fan 65 is along the Y-axis direction, the third through hole 121 is configured as an air inlet, and the first through hole 131 and the second through hole 141 respectively correspond to one centrifugal fan 65, serving as the air outlet of the centrifugal fan 65. In this embodiment, the air inlet direction of the centrifugal fan 65 is at an angle of 90° to the air outlet direction.

[0078] Specific reference Figure 1 , Fig.14 and Fig.15 In this embodiment, a fourth through hole 111 is provided on the first shell. The controller further includes a display unit 70, and the display unit corresponds to the fourth through hole 111. The display unit 70 includes a display keypad 71. The display keypad 71 is axially arranged on a side of the main control board 40 adjacent to the communication board 50. The display keypad 71 is fixedly connected to the first support plate 21, and the connection between the two can be connected by fasteners. A plurality of keys 72, a display screen 73 and a plurality of indicator lights 74 arranged at intervals are provided on the side of the display keypad 71 adjacent to the first support plate 21, and are correspondingly embedded in the key holes, display holes and indicator holes on the first support plate 21. In this embodiment, the display screen 73 is arranged between the keys 72 and the indicator lights 74, and the plurality of keys 72 are configured as three keys 72, and the three keys 72 are arranged in a row and at intervals; the plurality of indicator lights 74 are configured as three indicator lights 74, and the three indicator lights 74 are arranged in a row and at intervals. Of course, there is no limit to the positions of the display screen 73, the button 72 and the indicator light 74, and there is no limit to the number of the buttons 72 and the indicator light 74. Technical personnel in this field can set them according to actual needs, and they only need to ensure that all three are set on the display screen button panel 71.

[0079] Furthermore, the display screen unit 70 also includes a display panel 75. The display panel 75 is arranged in the accommodation space formed by the fourth through hole 111 and the first support plate 21. Another function of the support frame 20 in the present application is to provide a space for setting the display screen unit 70, that is, the accommodation space formed by the fourth through hole 111 and the first support plate 21. If there is no support frame 20, only the fourth through hole 111, and the fourth through hole 111 is the inside of the controller 1, the display screen keypad 71 and the display panel 75 cannot be fixed, and the display screen unit 70 cannot be set on the controller 1, and the need to set the display screen 73 on the controller 1 cannot be realized. Therefore, setting the support frame 20 in the housing 10 is one of the innovative points of the present utility model, which not only realizes that the positions of the drive board 30, the main control board 40, and the communication board 50 are easy to fix, and are convenient to be assembled in the housing 10, so as to realize the three as an integrated structure, but also facilitates meeting the need to set the display screen 73 on the controller 1. The outer edge of the display panel 75 is preferably flush with the outer edge of the first shell, of course, it can also be higher than the outer edge of the first shell or lower than the outer edge of the first shell, which can be determined by those skilled in the art according to the specific situation. The display panel 75 is also provided with corresponding button holes, display screen holes and indicator light holes. The buttons 72, display screen 73 and indicator light 74 on the display screen key board 71 are inserted into the display panel from the first support plate 21. The outer edge of the display panel 75 is in a sealed state to seal the buttons 72, display screen 73 and indicator light 74, so that the buttons 72 can be pressed on the display panel 75.

[0080] Specifically, Figure 4 , Fig.16 and Fig.17 In this embodiment, the first support plate 21 is provided with a fifth through hole 24. The fifth through hole 24 is provided corresponding to the main control board 40. The driving board 30 is provided with a driving board connection terminal 32, the main control board 40 is provided with a plurality of main control board connection terminals 41, the communication board 50 is provided with a communication board connection terminal 51, and the display screen key board connection terminal 76 is provided on the display screen key board 71. The fifth through hole 24 is configured as an operation area, which is convenient for realizing the connection of the main control board connection terminal 41 with the driving board connection terminal 32, the communication board connection terminal 51, and the display screen key board connection terminal 76 respectively after the controller is assembled, so as to realize the electrical connection between the main control board 40 and the driving board 30, the electrical connection between the communication board 50 and the main control board 40, and the electrical connection between the main control board 40 and the display screen key board 71.

[0081] In addition, the drive board 30 may also be provided with a power input interface, a power output port and at least one capacitor. The power input interface is embedded in the housing 10, and the power input interface is connected to an external power supply to realize power supply to the controller 1 so that the controller 1 can operate normally. The power output port is electrically connected to the magnetic levitation motor to transmit the instructions output by the controller 1 to the magnetic levitation motor, thereby controlling the suspension and rotation of the rotor. A power module, a communication connector, and a sensor connector may also be provided on the main control board 40. The power module is used to convert the alternating current in the controller 1 into direct current, or to convert direct current into alternating current. The sensor connector is electrically connected to the sensor unit on the magnetic levitation motor. An external interactive terminal may also be provided on the communication board 50. The external interactive terminal is electrically connected to an external device to realize the transmission of an external signal to the controller 1, or the transmission of the instructions output by the controller 1 to an external device. Those skilled in the art may set the types and layout positions of the electronic components on the drive board, the main control board, and the communication board according to actual needs.

[0082] Specifically, in this embodiment, Fig.18 A wire harness fixing plate 90 is provided on one side of the housing 10, which is used to fix multiple wire harnesses on the outside of the controller 1 on the wire harness fixing plate 90 to avoid multiple wire harnesses being tangled together, which not only affects the overall aesthetics of the controller 1 but also is inconvenient for operators to use. The wire harness fixing plate 90 is configured in an L shape, that is, it includes two fixing plates at 90°. One side of the wire harness fixing plate 90 is fixed to the first side wall 13 or the second side wall 14, and the other side at 90° thereto is flush with the bottom of the housing 10, and multiple wire harnesses are fixed to the wire harness fixing plate 90 on the other side. A plurality of wire harness fixing holes are provided on the wire harness fixing plate 90, and cable ties or fixing buckles are inserted into the wire harness fixing holes to fix the wire harnesses on the wire harness fixing plate 90.

[0083] Specifically, in this embodiment, Fig.19 , a mounting plate 100 is also fixedly connected to the side wall of the second shell 12. The radial length of the mounting plate 100 is greater than the radial length of the controller 1, and the portion of the mounting plate 100 that is higher than the second shell 12 is provided with at least two mounting holes, preferably two mounting holes. The two mounting holes are hung on an external connector to fix the controller 1. Alternatively, at least one guide rail snap-in unit 110, preferably two guide rail snap-in units 110, is provided on the side wall of the second shell 12, and the two guide rail snap-in units 110 are snapped on the external connector to fix the controller 1. For a controller 1 that is larger in size and heavier in weight, it is preferably fixed using a mounting plate 100. Of course, those skilled in the art can also make a choice according to actual needs.

[0084] The present application also discloses a magnetic levitation device, including a magnetic levitation motor and a controller for the magnetic levitation motor. The magnetic levitation device can be configured as a magnetic levitation pump or a magnetic levitation turntable or a magnetic levitation stirrer. The rotor in the magnetic levitation motor can be an integral rotor. For example, in the application of a magnetic levitation pump, the rotor is both the rotor of the magnetic levitation motor and the rotor of the magnetic levitation pump, and can be, for example, a permanent magnet rotor or a short-circuit cage rotor or a reluctance rotor. The stator is designed as a bearing and a driving stator, including a stator core and a suspension coil and a rotating coil wound on the stator core. The stator is both a rotationally driven stator and a magnetically suspended stator. On the one hand, the stator applies a torque to the rotor to achieve its rotation around the desired axis of rotation, and on the other hand, applies a shear force, which is applied to the rotor so that its radial position can be actively controlled or adjusted. Therefore, the stator can actively adjust the three degrees of freedom of the rotor, namely its rotation and its radial position (two degrees of freedom). The other three degrees of freedom, namely, its position in the axial direction and the inclination relative to the radial plane perpendicular to the desired rotation axis (two degrees of freedom), the rotor is passively magnetically suspended or stabilized by magnetic resistance. The controller 1 is electrically connected to the magnetic suspension motor, and is electrically connected to the sensor module on the magnetic suspension motor through the sensor connector 44 on the main control board 40, and receives the rotor position signal output by the sensor module, specifically including the position and posture of the rotor, the acceleration of the rotor, and the current and other signals. The controller 1 generates a control signal according to the control algorithm to control the magnitude and direction of the current, so that the rotor is suspended in a relatively stable position so that a stable gap is maintained between the rotor and the stator, so as to realize the control of the rotor to stably suspend and rotate in the expected position, thereby realizing the stable operation of the magnetic suspension motor.

[0085] The utility model uses specific embodiments to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. At the same time, for ordinary technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A controller for a magnetic levitation motor, the magnetic levitation motor comprising a stator and a rotor, characterized in that: The controller comprises a housing (10) and a support frame (20), a drive board (30), a main control board (40) and a communication board (50) arranged in the housing, wherein the support frame is arranged at one end of the housing, and the interior of the support frame is arranged as a storage space, the drive board extends along the X-axis direction and is fixed to the bottom of the housing, a portion of the drive board is located in the storage space and is fixedly connected to the support frame, the main control board extends along the Y-axis direction and is located in the storage space, the main control board is arranged above the drive board and is fixedly connected to the support frame, the communication board extends along the Y-axis direction and is located in the storage space, the communication board is arranged on one side of the main control board and is fixedly connected to the support frame, wherein the drive board is electrically connected to the main control board, and the main control board is electrically connected to the communication board.

2. The magnetic levitation motor controller according to claim 1, characterized in that: The support frame comprises a first support plate (21) extending in the axial direction, a second support plate (22) and a third support plate (23) extending in the radial direction and arranged opposite to each other, and the first support plate is fixedly connected between the second support plate and the third support plate.

3. The magnetic levitation motor controller according to claim 2, characterized in that: The housing comprises a first shell (11), a second shell (12), a first side wall (13) and a second side wall (14); an opening of the first shell and an opening of the second shell are radially engaged with each other; the first side wall and the second side wall are respectively arranged on both sides of the first shell and the second shell that are engaged with each other.

4. The magnetic levitation motor controller according to claim 3, characterized in that: The two radial side walls of the first shell are fixedly connected to the second support plate and the third support plate respectively, the side walls of the first shell are fixedly connected to the first support plate along the axial direction, and the two radial side walls of the second shell are fixedly connected to the second support plate and the third support plate respectively.

5. The magnetic levitation motor controller according to claim 2, characterized in that: The two ends of the driving board along the X-axis direction are fixedly connected to the bottom of the shell and the third support plate respectively, the two ends of the main control board along the Y-axis direction are fixedly connected to the driving board and the second support plate respectively, the communication board is fixedly connected to the first support plate, and / or the two ends of the communication board along the Y-axis direction are clamped in the second support plate and the third support plate.

6. The magnetic levitation motor controller according to claim 1, characterized in that: The controller further comprises at least one heat dissipation unit (60), which is arranged in the housing. A plurality of power elements (31) are arranged on the drive board, and the heat dissipation unit is arranged above the power elements to dissipate heat from the power elements.

7. The magnetic levitation motor controller according to claim 6, characterized in that: The heat dissipation unit comprises a heat dissipation cover (61), a plurality of heat dissipation fins (62), and a heat dissipation cover plate (63); the top of the heat dissipation cover is open; the bottom of the heat dissipation cover abuts against the upper surfaces of the plurality of power elements; a plurality of protrusions (67) are provided on the inner side wall of the heat dissipation cover; a plurality of grooves (66) arranged in rows and spaced apart are provided on the bottom wall of the heat dissipation cover; a heat dissipation fin is correspondingly embedded in each of the grooves; and the heat dissipation cover plate is covered above the plurality of heat dissipation fins and clamped on the top of the heat dissipation cover.

8. The magnetic levitation motor controller according to claim 7, characterized in that: Each heat dissipation fin is provided with an air duct (621) inside, the outer edge and inner wall of the heat dissipation fin are provided with a plurality of protrusions, and the heat dissipation fin is provided with a transverse plate (622) fixedly connected to the inner walls on both sides thereof.

9. The magnetic levitation motor controller according to claim 7, characterized in that: The heat dissipation unit further comprises at least one fan, and a portion of the housing corresponding to the heat dissipation unit is provided with a first through hole (131) and a second through hole (141), wherein the first through hole (131) and the second through hole (141) are arranged opposite to each other.

10. The magnetic levitation motor controller according to claim 9, characterized in that: The fan is configured as an axial flow fan (64), at least one axial flow fan is configured at the end of the heat dissipation fin along the Z-axis direction and fixed on the heat dissipation cover, the first through hole is configured as the air inlet / outlet of the fan, and the second through hole is configured as the air outlet / inlet of the fan, wherein the air inlet direction and the air outlet direction are both along the axial direction of the axial flow fan.

11. The magnetic levitation motor controller according to claim 9, characterized in that: The fan is configured as a centrifugal fan (65), at least one centrifugal fan is configured inside the heat dissipation fins and fixed on the heat dissipation cover, the axial direction of the centrifugal fan is configured as the air inlet direction, and the direction perpendicular to the axial direction is configured as the air outlet direction, and a third through hole (121) is configured on the top surface of the housing corresponding to the centrifugal fan, the third through hole is configured as the air inlet / air outlet of the centrifugal fan, and the first through hole and the second through hole are both configured as the air outlet / air inlet of the centrifugal fan.

12. The magnetic levitation motor controller according to claim 3, characterized in that: The first shell is provided with a fourth through hole (111), the controller further comprises a display screen unit (70), the display screen unit corresponds to the fourth through hole, the display screen unit comprises a display screen key board (71), the display screen key board is axially arranged on a side of the main control board adjacent to the communication board, the display screen key board is fixedly connected to the first support board, a plurality of keys (72) arranged at intervals, a display screen (73) and a plurality of indicator lights (74) arranged at intervals are provided on the side of the display screen key board adjacent to the first support board, and are correspondingly embedded in the key hole, display screen hole and indicator light hole on the first support board.

13. The magnetic levitation motor controller according to claim 12, characterized in that: The display screen unit further comprises a display panel (75), and the display panel is arranged in a receiving space formed by the fourth through hole and the first supporting plate.

14. The magnetic levitation motor controller according to claim 12, characterized in that: The first support plate is provided with a fifth through hole (24), the drive plate is provided with a drive plate connection terminal (32), the main control plate is provided with a plurality of main control plate connection terminals (41), the communication plate is provided with a communication board connection terminal (51), the display screen key plate is provided with a display screen key plate connection terminal (76), and the fifth through hole is configured as an operation area to realize the connection of the main control plate connection terminal with the drive plate connection terminal, the communication board connection terminal, and the display screen key plate connection terminal respectively.

15. The magnetic levitation motor controller according to claim 3, characterized in that: A wire harness fixing plate (90) is provided on one side of the shell, one side of the wire harness fixing plate is fixed on the first side wall or the second side wall, and the other side is flush with the bottom of the shell, and a plurality of wire harness fixing holes are arranged on the wire harness fixing plate.

16. The magnetic levitation motor controller according to claim 3, characterized in that: A mounting plate (100) is also fixedly connected to the side wall of the second shell, and a portion of the mounting plate higher than the second shell is provided with at least two mounting holes; or at least one guide rail buckle unit (110) is provided on the side wall of the second shell.

17. A magnetic levitation device, characterized in that: It comprises a magnetic levitation motor and a controller for the magnetic levitation motor as described in any one of claims 1-16.

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