Rotary permanent magnet electric suspension testing device

Abstract

The utility model discloses a kind of rotary permanent magnet electric suspension testing devices, involve permanent magnet electric suspension test field.The present test device includes rack, height adjusting device, drive unit and for steering steering device, height adjusting device includes height adjusting frame, vertical displacement device, height adjusting support and laser displacement sensor, vertical displacement device is set on rack, vertical displacement device is fixedly connected by height adjusting support with height adjusting frame;The output end of drive unit is equipped with annular permanent magnet;Vertical displacement device includes sliding limit slot, limit rod, adjusting screw, adjusting slider, adjusting slider is equipped with on adjusting screw and limit rod, adjusting slider is fixedly connected by height adjusting support with height adjusting frame.The present test device can complete the suspension, drive and the integrated performance test of guiding of rotary permanent magnet electric suspension system, can complete the system electromagnetic force characteristic under multiple working conditions, conductor plate temperature rise law and thermal-mechanical coupling characteristic research.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet electric levitation testing, and more specifically, to a rotary permanent magnet electric levitation testing device. Background Technology

[0002] Permanent magnet electric levitation systems have demonstrated competitiveness among numerous magnetic levitation systems due to their advantages such as simple structure, reliable system, and large levitation gap, and have been favored by many researchers.

[0003] From the perspective of the field source array structure, permanent magnet electric levitation systems can be further divided into linear and rotating systems. Existing linear permanent magnet electric levitation technology is relatively mature and widely used in maglev trains; however, its large magnetic resistance in the forward direction is one of the problems that urgently needs to be solved for its engineering application. The toroidal Halbach array can transform harmful magnetic resistance into useful driving force, changing the limitation of linear systems constrained by inherent magnetic resistance, and achieving integrated levitation, driving, and guidance. This has a wider range of applications in ground transportation, such as maglev trains, maglev cars, and maglev logistics, making rotating permanent magnet electric levitation systems increasingly attract attention. However, research on rotating permanent magnet electric levitation systems is still in the theoretical stage, lacking sufficient experimental and testing verification, thus hindering its practical application. Summary of the Invention

[0004] The inventors of this utility model have discovered that the lateral stability of permanent magnet electric suspension systems has always been a challenge. Lateral stability is related to the guidance problem, which has always been a weak point of permanent magnet electric suspension systems. In existing testing devices, only suspension and drive tests can be conducted, and integrated performance tests of suspension, drive, and guidance cannot be completed. Existing testing devices can only perform a limited number of test conditions. The variable speed rotation, fixed angle deflection, and variable gap floating and sinking of the vehicle-mounted magnetic wheel cannot be performed simultaneously. The magnetic wheel speed, deflection angle, suspension gap, triaxial force, and conductor plate temperature cannot be detected simultaneously.

[0005] To address the aforementioned technical problems, this utility model provides a rotating permanent magnet electric levitation testing device. On one hand, this testing device can perform integrated performance testing of the levitation, driving, and guiding functions of a rotating permanent magnet electric levitation system, further resolving the challenge of lateral stability in permanent magnet electric levitation systems. On the other hand, this testing device can complete studies on the system's electromagnetic force characteristics, conductor plate temperature rise patterns, and thermo-mechanical coupling characteristics under various operating conditions, achieving comprehensive performance testing of the rotating permanent magnet electric levitation system. This is particularly beneficial for conducting research on the electromagnetic force characteristics of permanent magnet wheels on maglev vehicles.

[0006] The technical solution adopted by this utility model is as follows:

[0007] A rotary permanent magnet electric levitation testing device includes a frame, a height adjustment device, a drive unit, and a steering device for steering. The height adjustment device includes a height adjustment frame, a vertical displacement device, a height adjustment bracket, and a laser displacement sensor. The vertical displacement device is mounted on the frame and is fixedly connected to the height adjustment frame via the height adjustment bracket. A support rod is provided between the height adjustment frame and the frame, with both ends of each support rod fixedly connected to the height adjustment frame and the frame, respectively. A ring-shaped permanent magnet is sleeved on the output end of the drive unit. The vertical displacement device includes a sliding limit groove, a limit rod, an adjusting screw, and an adjusting slider. An adjusting slider is sleeved on the adjusting screw and the limit rod, and the adjusting slider is fixedly connected to the height adjustment frame via the height adjustment bracket. The steering device is directly and vertically connected to the drive unit. The laser displacement sensor is located on the drive unit.

[0008] Optionally, the height adjustment device includes a height adjustment frame, a vertical displacement device, and a height adjustment bracket. The vertical displacement device is fixedly mounted on the frame and is fixedly connected to the height adjustment frame via the height adjustment bracket.

[0009] Optionally, a support rod is provided between the height adjustment frame and the machine frame. There are at least two support rods, and the two ends of each support rod are fixedly connected to the height adjustment frame and the machine frame, respectively.

[0010] Optionally, the vertical displacement device includes a sliding limit groove, a limit rod, an adjusting screw, and an adjusting slider. The adjusting screw and the limit rod are arranged in parallel within the sliding limit groove. An adjusting slider is sleeved on the adjusting screw and the limit rod. The adjusting slider is fixedly connected to the height adjustment frame through a height adjustment bracket. It is also equipped with an adjusting wheel that is poweredly connected to the top of the adjusting screw.

[0011] Optionally, a laser displacement sensor is installed on one side of the height adjustment frame, and the laser displacement sensor provides real-time feedback on the suspension gap to the host computer.

[0012] Optionally, the drive unit includes a servo motor, a DC motor, and an electronic speed controller. The servo motor is fixedly mounted on the height adjustment frame and is powered by the steering device via a servo disc. A DC motor is fixedly mounted on the steering device and is powered by a ring-shaped Halbach permanent magnet. The electronic speed controller is fixedly mounted on the height adjustment frame.

[0013] Optionally, the DC motor is a three-phase brushless external rotor DC motor. A speed sensor is installed at the tail of the DC motor, and an angle sensor is installed inside the servo motor. The speed sensor and the angle sensor work together with the control unit to display the detected and processed speed and angle data in real time through the host computer.

[0014] Optionally, the steering device includes a steering bracket, a bearing mounting plate, a first thrust bearing, a second thrust bearing, and a steering support plate. The top of the steering bracket is fixedly connected to the rudder. Grooves are provided on the inner and outer sides of the bottom of the steering bracket, above the steering support plate, and below the bearing mounting plate. The first thrust bearing is installed in the inner groove of the bottom of the steering bracket, and the second thrust bearing is installed in the outer groove of the bottom of the steering bracket. The top of the first thrust bearing is installed in the groove of the bearing mounting plate, and the bottom of the second thrust bearing is installed in the groove of the steering support plate. The bearing mounting plate, the first thrust bearing, the steering bracket, the second thrust bearing, and the steering support plate are connected by vertically penetrating bolts.

[0015] Optionally, a fixing rod is provided between the steering support plate and the height adjustment frame. There are at least four fixing rods, and the two ends of each fixing rod are fixedly connected to the height adjustment frame and the steering support plate, respectively.

[0016] Optionally, the control unit adopts an STM32 embedded microcontroller. The control unit and the drive unit work together to drive and control the DC motor and servo motor through PWM pulse width modulation technology and PID control strategy to realize the DC motor speed regulation and servo motor fixed angle deflection function.

[0017] Optionally, the measuring unit includes a first slide plate, a first slider, a first guide rail, a first bracket, a second bracket, and a levitation force sensor. The first bracket is fixedly mounted on the frame, and there are four sets of first brackets. Each set of first brackets has a first guide rail fixedly mounted on it. All four first guide rails are perpendicular to the frame. Each first guide rail has a first slider mounted on it. Each first slider has a set of second brackets fixedly mounted on it. A first slide plate is fixedly mounted on each of the four sets of second brackets. The first slide plate is parallel to the frame, and the levitation force sensor is vertically connected between the first slide plate and the frame.

[0018] Optionally, the measuring unit also includes a second guide rail, a second slider, a second slide plate, a guide force sensor, a third guide rail, a third slider, a third slide plate, and a driving force sensor. Two second guide rails are fixedly mounted on the first slide plate, and the two second guide rails are arranged parallel to each other in the transverse direction. Two second sliders are fitted on each second guide rail. A second slide plate is fixedly mounted on each of the four second sliders. A guide force sensor is connected transversely between the second slide plate and the first slide plate. Two third guide rails are fixedly mounted on the second slide plate, and the two third guide rails are arranged parallel to each other in the longitudinal direction. Two third sliders are fitted on each third guide rail. A third slide plate is fixedly mounted on each of the four third sliders. A driving force sensor is connected longitudinally between the third slide plate and the second slide plate.

[0019] Optionally, a conductor plate is fixedly installed on the third slide plate, and a temperature sensor is installed on the surface of the conductor plate. The temperature sensor feeds back the temperature to the host computer in real time.

[0020] Optionally, both the height adjustment frame and the third slide plate are made of epoxy resin material, and the thickness of the third slide plate is greater than 15mm.

[0021] The beneficial effects of this utility model are as follows: Compared with the existing rotary permanent magnet electric suspension and drive integrated testing device, the measuring unit of the rotary permanent magnet electric suspension testing device in this utility model embodiment includes a speed sensor, an angle sensor, a driving force sensor, a guiding force sensor, an angle sensor, and a suspension force sensor. The measuring unit is equipped with a three-dimensional force testing structure, which can especially test the guiding force. The guiding force in this utility model embodiment is the steering force generated by the permanent magnet. It can test the suspension performance, driving performance, or guiding performance separately, or it can test the integrated performance of suspension-drive-guidance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the rotating permanent magnet electric levitation testing device in an embodiment of this utility model;

[0024] Figure 2 This is a front view schematic diagram of the rotary permanent magnet electric levitation test device in the embodiment of this utility model;

[0025] Figure 3 This is a side view of the rotary permanent magnet electric levitation test device in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the steering device structure in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the control and measurement of the rotary permanent magnet electric levitation test device in this embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of permanent magnet deflection in an embodiment of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a rotary permanent magnet electric levitation testing device. In one embodiment, the testing device includes a frame 1, a height adjustment device, a drive unit, and a steering device, with the steering device directly and vertically connected to the drive unit. In another embodiment, the testing device includes a frame 1, a height adjustment device, a control unit 2, a drive unit, and a measuring unit. In one example, some or all of the height adjustment device, control unit 2, drive unit, and measuring unit are disposed on the frame 1. In another example, the height adjustment device is disposed on the frame 1; the control unit 2 is disposed on the height adjustment device or the frame 1; the drive unit is fixedly suspended below the height adjustment device, and an annular Halbach permanent magnet 3 is sleeved on the output end of the drive unit; a conductor plate 4 is located below the annular Halbach permanent magnet 3; and the measuring unit is disposed on the frame 1 and is used to measure the levitation force, driving force, and guiding force of the Halbach permanent magnet 3, which are also referred to as triaxial forces. The measuring unit includes a speed sensor, an angle sensor, a driving force sensor, a guiding force sensor, and a levitation force sensor, respectively used to test the rotational speed, deflection angle, driving force, guiding force, and levitation force of the annular Halbach permanent magnet.

[0032] like Figure 1 , Figure 2 and Figure 3As shown, the height adjustment device includes a height adjustment frame 5, a vertical displacement device height adjustment bracket 6, and a laser displacement sensor 13. The vertical displacement device is fixedly mounted on the frame 1 and is connected to the height adjustment frame 5 via the height adjustment bracket 6. The Halbach permanent magnet 3 is connected to the height adjustment frame 5 or the height adjustment bracket 6.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, a support rod 7 is provided between the height adjustment frame 5 and the frame 1. At least two support rods 7 are provided, and both ends of each support rod 7 are fixedly connected to the height adjustment frame 5 and the frame 1, respectively. In this invention, the support rod 7 is provided between the height adjustment frame 5 and the frame 1 to prevent the annular Halbach permanent magnet 3 from shaking during operation, thereby improving the stability of the testing device and the accuracy of the test results. The connection between the support rod 7 and one side of the height adjustment frame 5 can be selected to be released or tightened according to the test conditions.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the vertical displacement device includes a sliding limiting groove 8, a limiting rod 9, an adjusting screw 10, and an adjusting slider 11. The adjusting screw 10 and the limiting rod 9 are arranged parallel to each other in the sliding limiting groove 8. The adjusting slider 11 is sleeved on the adjusting screw 10 and the limiting rod 9. The adjusting slider 11 is connected to the height adjusting frame 5 through the height adjusting bracket 6, and is also equipped with an adjusting wheel 12 that is poweredly connected to the top of the adjusting screw 10. In one example, the Halbach permanent magnet 3 is connected to the height adjusting bracket 6, and the adjusting slider 11 drives the height adjusting bracket to move vertically, and the Halbach permanent magnet 3 moves vertically together with the height adjusting frame 5.

[0035] By using a height adjustment device to drive the annular Halbach permanent magnet 3 to move vertically, the suspension gap between the annular Halbach permanent magnet 3 and the conductor plate 4 can be adjusted, allowing the study of electromagnetic characteristics under different suspension gaps. The vertical displacement adjustment function of the testing device is achieved by manually rotating the adjusting wheel 12 to drive the adjusting slider 11 to move vertically along the adjusting screw 10, greatly improving testing efficiency. It should be understood that in other examples, the adjusting wheel 12 is driven by a motor to drive the adjusting slider 11.

[0036] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the laser displacement sensor 13 is used to detect the suspension gap between the Halbach permanent magnet 3 and the conductor plate 4. In one example, the laser displacement sensor 13 is mounted on the height adjustment frame 5 to detect the vertical displacement of the slider 11. In another example, the laser displacement sensor 13 is mounted on the drive unit. In yet another example, the laser displacement sensor 13 is mounted on the conductor plate 4. It should be understood that the laser displacement sensor 13 can be mounted in other locations. The laser displacement sensor 13 provides real-time feedback of the suspension gap to the host computer. In this embodiment, a dedicated host computer data acquisition system is developed, wherein the present invention preferably uses the laser displacement sensor 13 to obtain the displacement of the annular Halbach permanent magnet 3 and feeds back the suspension gap data to the host computer in real time via serial communication.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the drive unit includes a servo motor 14, a DC motor 15, and an electronic speed controller 16. The servo motor 14 is fixedly mounted on the elevation adjustment frame 5 and is poweredly connected to the steering device via a steering disc 17. The DC motor 15 is fixedly mounted on the steering device and is poweredly connected to the annular Halbach permanent magnet 3. The electronic speed controller 16 is fixedly mounted on the elevation adjustment frame 5. In this invention, the drive unit drives the annular Halbach permanent magnet 3 to rotate and deflect. The steering device is directly and vertically connected to the drive unit. Specifically, the steering device is directly and vertically connected to the servo motor 14 via the steering disc 17, avoiding various positioning errors caused by intermediate rotating devices and improving steering accuracy. Figure 4 and Figure 6 As shown, the servo motor 14 drives the servo disc 17 to rotate, the servo disc 17 drives the steering bracket 18 to rotate, and the steering bracket 18 drives the annular Halbach permanent magnet 3 to deflect. In one example, the placement angle of the servo motor 14 is α, and the deflection angle of the annular Halbach permanent magnet 3 relative to the straight-line direction L of the vehicle is β.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the DC motor 15 is a three-phase brushless external rotor DC motor or other types of motor. A speed sensor for detecting the speed of the DC motor 15 is mounted at the tail end. An angle sensor for detecting the rotation angle of the servo motor 14 is installed inside the servo motor 14. The speed sensor and angle sensor are electrically connected to the control unit 2, and the detected and processed speed and angle data are displayed in real time on the host computer. In this embodiment, the speed sensor information is acquired using an input capture method, and the angle sensor information is acquired using an ADC acquisition method. After processing in the control unit 2, the data is fed back to the host computer via serial communication, achieving real-time detection and recording. The testing process in this embodiment is automated. An embedded microcontroller centrally and automatically controls the speed and deflection angle of the annular Halbach permanent magnet. A height adjustment device assists in adjusting the suspension gap of the annular Halbach permanent magnet. Multiple sensors are arranged, including speed, angle, suspension gap, triaxial force, and temperature sensors. The data from each sensor are centrally displayed and saved in real time on the host computer, saving time and effort, and making operation safer, more reliable, and more convenient.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the steering device includes a steering bracket 18, a bearing mounting plate 19, a first thrust bearing 20, a second thrust bearing 21, and a steering support plate 22. The top of the steering bracket 18 is fixedly connected to the rudder disc 17. Grooves are respectively provided on the inner and outer sides of the bottom of the steering bracket 18, above the steering support plate 22, and below the bearing mounting plate 19. The first thrust bearing 20 is disposed in the inner groove of the bottom of the steering bracket 18, and the second thrust bearing 21 is disposed in the outer groove of the bottom of the steering bracket 18. The top of the first thrust bearing 20 is disposed in the groove of the bearing mounting plate 19, and the bottom of the second thrust bearing 21 is disposed in the groove of the steering support plate 22. The bearing mounting plate 19, the first thrust bearing 20, the steering bracket 18, the second thrust bearing 21, and the steering support plate 22 are connected by a vertically penetrating bolt 23. In this embodiment, the rotational friction of the steering bracket 18 during steering is eliminated by the first thrust bearing 20 and the second thrust bearing 21, and the positioning and fixing of the thrust bearings are achieved by embedding the thrust bearings into the grooves.

[0040] like Figure 1 , Figure 2 and Figure 3As shown, a fixing rod 24 is provided between the steering support plate 22 and the height adjustment frame 5. At least four fixing rods 24 are provided, and both ends of each fixing rod 24 are fixedly connected to the height adjustment frame 5 and the steering support plate 22, respectively. In this invention, the fixing rods 24 fix the steering support plate 22 to the bottom of the height adjustment frame 5, and the steering support plate 24 supports the entire drive unit, preventing the annular Halbach permanent magnet 3 from tilting due to excessive weight, thus enhancing the stability of the rotation and deflection of the annular Halbach permanent magnet 3.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the control unit 2 uses an STM32 embedded microcontroller. The control unit 2 works in conjunction with the drive unit to drive and control the DC motor 15 and the servo motor 14 through PWM pulse width modulation technology and PID control strategy, realizing speed regulation of the DC motor 15 and fixed-angle deflection of the servo motor 14. In this invention, a control system is written into the control unit 2. The rotational speed and deflection angle of the annular Halbach permanent magnet 3 are controlled by the adjustment buttons on the control unit 2. This allows for the study of electromagnetic characteristics at different rotational speeds and deflection angles, including the levitation force, driving force, and guiding force as a function of rotational speed, levitation gap, deflection angle, and conductor plate temperature.

[0042] This invention enables the study of system electromagnetic force characteristics under various operating conditions, including the characteristics of levitation force, driving force, and guiding force under different rotational speeds, deflection angles, and levitation gaps. By detecting the temperature of the conductor plate, the temperature rise law of the conductor plate and the thermo-mechanical coupling characteristics can be studied. Furthermore, by changing the relative position of the annular Halbach permanent magnet and the conductor plate, the track gap effect and boundary effect can be studied. This invention represents an exploration of new ground transportation and fundamental research on rotary electric levitation, particularly providing technical reserves for rotary permanent magnet electric levitation vehicles, which is beneficial for future research and development of magnetic levitation vehicles.

[0043] The force applied by the ring-shaped Halbach permanent magnet 3 to the conductor plate 4 will generate an equal reaction force. The conductor plate 4 is connected to the levitation force sensor 30 for detecting levitation force, the guide force sensor 34 for detecting lateral force, and the drive force sensor 38 for detecting driving force, respectively, and transmits the corresponding force to the sensor, which then transmits the corresponding force to the host computer.

[0044] The deflecting magnetic wheel is crucial for resolving magnetic reluctance and compensating for lateral forces. When the permanent magnet wheel rotates at high speed above the conductor plate, its generated magnetic field creates relative motion with the conductor plate within a confined space. This causes a change in the magnetic flux within the conductor plate, inducing an electromotive force and forming strong eddy currents. The induced magnetic field generated by these eddy currents interacts with the source magnetic field of the permanent magnet wheel, causing it to generate a vertically upward (y-axis) levitation force Fl and a radial magnetic reluctance Fr that opposes its own rotation (x-axis). The levitation force overcomes its own weight, while the magnetic reluctance can be analogous to the friction between a car tire and the road surface, propelling the permanent magnet electric levitation car forward and achieving integrated levitation and drive systems.

[0045] However, as the above analysis shows, the permanent magnet wheel only generates electromagnetic force on the y-axis and x-axis, lacking lateral (z-axis) guiding force, leading to lateral instability. When subjected to lateral gusts or other disturbances during operation, lateral instability will occur. Secondly, because it cannot actively adjust its lateral force to change its lateral position and speed, the permanent magnet wheel can only travel in a straight line. Furthermore, it cannot resist lateral centrifugal force when cornering, resulting in drift and severely impacting the operational safety of the maglev car. Therefore, permanent magnet electric levitation cars are characterized by a lack of lateral (guiding) force, uncontrollable lateral movement, and susceptibility to lateral instability, making lateral (guiding) force compensation crucial. Scholars from various countries have successively conducted research on this. In 2000, Fujii et al. used four axial wheels to construct a suspension system to achieve stable levitation, generating lateral force through tilting and partial overlap to achieve lateral adjustment. In 2016, Jung also designed a contactless transportation system and a four-wheel suspension drive prototype using a partially overlapping arrangement of axial wheels. In 2017, Jung designed a four-wheeled magnetic levitation prototype using radial wheels. The lateral restoring force generated by the interaction between the radial wheels and the conductor plate rail gap resists lateral disturbances, thus achieving a guiding function. In 2023, Liu Xin et al. compensated for the system's lateral force by tilting the radial wheels and conductor plate, decomposing the normal force into levitation force and lateral force. All of the above studies passively generate lateral (guiding) force through special placement between the magnetic wheels and conductor plates, limiting travel to fixed tracks and failing to meet the characteristics of free and flexible road transportation.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, in one example, the measuring unit includes a first slide plate 25, a first slider 26, a first guide rail 27, a first bracket 28, a second bracket 29, and a levitation force sensor 30. The first bracket 28 is fixedly mounted on the frame 1. There are four sets of first brackets 28. Each set of first brackets 28 has a first guide rail 27 fixedly mounted on it. All four first guide rails 27 are perpendicular to the frame 1. Each first guide rail 27 has a first slider 26 mounted on it. Each first slider 26 has a set of second brackets 29 fixedly mounted on it. Each of the four sets of second brackets 29 has a first slide plate 25 fixedly mounted on it. The first slide plate 25 is parallel to the frame 1. The levitation force sensor 30 is vertically connected between the first slide plate 25 and the frame 1.

[0047] The measuring unit also includes a second guide rail 31, a second slider 32, a second slide plate 33, a guide force sensor 34, a third guide rail 35, a third slider 36, a third slide plate 37, and a driving force sensor 38. Two second guide rails 31 are fixedly mounted on the first slide plate 25. The two second guide rails 31 are arranged parallel to each other in the transverse direction. Two second sliders 32 are fitted on each second guide rail 31. A second slide plate 33 is fixedly mounted on each of the four second sliders 32. A guide force sensor 34 is connected transversely between the second slide plate 33 and the first slide plate 25. Two third guide rails 35 are fixedly mounted on the second slide plate 33. The two third guide rails 35 are arranged parallel to each other in the longitudinal direction. Two third sliders 36 are fitted on each third guide rail 35. A third slide plate 37 is fixedly mounted on each of the four third sliders 36. A driving force sensor 38 is connected longitudinally between the third slide plate 37 and the second slide plate 33. A conductor plate 4 is fixedly mounted on the third slide plate 37. A temperature sensor is installed on the surface of the conductor plate 4. The temperature sensor provides real-time temperature feedback to the host computer.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, both the height adjustment frame 5 and the third sliding plate 37 are made of epoxy resin, and the thickness of the third sliding plate 37 is greater than 15mm. In this invention, the height adjustment frame 5 and the third sliding plate 37 are close to the annular Halbach permanent magnet 3. The use of epoxy resin material can avoid electromagnetic induction with the annular Halbach permanent magnet 3. The third guide rail 35 is made of metal. With the thickness of the third sliding plate 37 greater than 15mm, the magnetic attraction force of the annular Halbach permanent magnet 3 on the third guide rail can be avoided, ensuring the validity of the test results.

[0049] By measuring the changes in the levitation force, driving force, and guiding force of the conductor plate 4 in the unit test, the levitation, driving, and guiding performance of the ring-shaped Halbach permanent magnet 3 can be tested, solving the problem of the lack of guiding performance testing dimensions in existing test devices. By adjusting the multi-degree-of-freedom motion of the ring-shaped Halbach permanent magnet 3 and adopting a multi-sensor arrangement, the electromagnetic force characteristics of the system, the temperature rise law of the conductor plate, and the thermo-mechanical coupling characteristics under various or combined working conditions can be studied, solving the problem of the single working condition in existing test devices.

[0050] In this embodiment of the invention, the triaxial force of the annular Halbach permanent magnet 3 is measured by a measurement module. The suspension sensor 30, the guiding force sensor 34, the driving force sensor 38, and the temperature sensor communicate via serial port to upload the triaxial force and conductor plate temperature data to the host computer in real time, realizing real-time recording of triaxial force and temperature. By using different annular Halbach permanent magnets, the electromagnetic characteristics of different magnets can be studied. By setting different rotation speeds, different vertical displacements, and different deflection angles, the electromagnetic force characteristics under specific working conditions can be studied. By detecting the temperature of the conductor plate, the temperature rise law of the conductor plate and the thermo-mechanical coupling characteristics can be studied. By changing the relative position of the annular Halbach permanent magnet 3 and the conductor plate 4, the rail gap effect and boundary effect can also be studied. To test the rail gap effect, the horizontal position of the Halbach permanent magnet 3 is placed on the rail gap of the conductor plate 4, and to test the boundary effect, the Halbach permanent magnet 3 is placed on the edge of the conductor plate 4.

[0051] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rotary permanent magnet electric suspension test device, characterized by, The system includes a frame, a height adjustment device, a drive unit, and a steering device for steering. The height adjustment device includes a height adjustment frame, a vertical displacement device, a height adjustment bracket, and a laser displacement sensor. The vertical displacement device is mounted on the frame and is fixedly connected to the height adjustment frame via the height adjustment bracket. A support rod is provided between the height adjustment frame and the frame, with both ends of each support rod fixedly connected to the height adjustment frame and the frame, respectively. A ring-shaped permanent magnet is sleeved on the output end of the drive unit. The vertical displacement device includes a sliding limit groove, a limit rod, an adjusting screw, and an adjusting slider. The adjusting slider is sleeved on the adjusting screw and the limit rod, and the adjusting slider is fixedly connected to the height adjustment frame via the height adjustment bracket. The steering device is directly and vertically connected to the drive unit. The laser displacement sensor is located in the drive unit.

2. The rotary permanent magnet motor levitation test device according to claim 1, wherein The drive unit also includes a servo motor, a DC motor, and an electronic speed controller. The servo motor is poweredly connected to the steering device via a servo disc. The DC motor is mounted on the steering device and is poweredly connected to the annular permanent magnet. The electronic speed controller is fixedly mounted on the height adjustment frame. 3.The rotary permanent magnet electric suspension test device of claim 2, wherein: A laser displacement sensor is installed on one side of the height adjustment frame, and the laser displacement sensor provides real-time feedback on the suspension gap to the host computer.

4. The rotary permanent magnet motor levitation test device according to claim 3, characterized in that: A speed sensor is fitted at the tail of the DC motor. The speed sensor and the angle sensor are used in conjunction with the control unit to display the detected and processed speed and angle data in real time through the host computer.

5. The rotary permanent magnet motor levitation test device of claim 1, wherein: The steering device includes a steering bracket, a bearing mounting plate, a first thrust bearing, a second thrust bearing, and a steering support plate. The top of the steering bracket is fixedly connected to the rudder. Grooves are respectively provided on the inner and outer sides of the bottom of the steering bracket, above the steering support plate, and below the bearing mounting plate. The first thrust bearing is disposed in the inner groove of the bottom of the steering bracket, and the second thrust bearing is disposed in the outer groove of the bottom of the steering bracket. The top of the first thrust bearing is disposed in the groove of the bearing mounting plate, and the bottom of the second thrust bearing is disposed in the groove of the steering support plate. The bearing mounting plate, the first thrust bearing, the steering bracket, the second thrust bearing, and the steering support plate are connected by a vertically penetrating bolt.

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