Axial magnetic flux electric suspension device, static suspension method and test platform

Abstract

The invention provides an axial magnetic flux electric suspension device, a static suspension method and a test platform, and relates to the technical field of magnetic suspension, the axial magnetic flux electric suspension device comprises a stator component, a suspension component and a control system; the suspension component is arranged above the stator component and comprises a primary iron core and an armature winding, the armature winding is fixedly arranged on the end face, close to the stator component, of the primary iron core and comprises an inner-layer winding and an outer-layer winding, and the inner-layer winding and the outer-layer winding are coaxially arranged along the center of the primary iron core. The phase sequences of the inner-layer winding and the outer-layer winding are opposite; the control system is electrically connected with the armature winding. According to the invention, two groups of armature windings with opposite phase sequences are adopted, so that the suspension device has no self-rotation torque or tangential force output and only outputs suspension force to the outside so as to realize electric repulsive force suspension; electric energy is directly converted into potential energy needed by suspension, the electric energy does not need to be converted into kinetic energy firstly, then the kinetic energy is converted into the potential energy needed by suspension, and a reference scheme is provided for electric suspension static or low-speed suspension.

Description

Technical Field

[0001] The present invention relates to the field of magnetic suspension technology, and in particular to an axial magnetic flux electric suspension device, a static suspension method and a test platform. Background Art

[0002] Electric suspension can realize non-contact torque transmission based on Lenz's law. It has the advantages of low friction, low noise, and small magnetic resistance at high speed. It can be used in magnetic levitation trains, bearingless motors, eddy current brakes and other fields. Existing electric suspension technologies mainly include superconducting electric suspension and permanent magnet electric suspension. The former uses the high current carrying capacity of superconducting materials to generate a high-intensity static magnetic field, which works with the "8"-shaped coil on the track to achieve passive suspension; the latter uses the car body or driver to drive the permanent magnet array to work with the track conductor plate to generate suspension force. However, whether it is superconducting electric suspension or permanent magnet electric suspension, the source magnetic field is a static magnetic field, which needs to rely on mechanical movement to generate a changing magnetic field, that is, electrical energy needs to be converted into kinetic energy and then converted into suspension potential energy, so it is difficult for the system to achieve suspension at rest or low speed. In addition, the existing rotary electric suspension system, due to the generation of axial torque, requires the system to be limited and constrained, and cannot achieve complete static suspension. These problems limit the widespread application of magnetic suspension technology.

[0003] Based on the shortcomings of the prior art, there is an urgent need for an axial flux electric suspension device, a static suspension method and a test platform. Summary of the invention

[0004] The purpose of the present invention is to provide an axial flux electric suspension device, a static suspension method and a test platform to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] In the first aspect, the present application provides an axial magnetic flux electric suspension device, characterized in that it includes: a stator component, a suspension component and a control system; the suspension component is arranged above the stator component, the suspension component includes a primary iron core and an armature winding, the armature winding is fixedly arranged on the end surface of the primary iron core close to the stator component, the armature winding includes an inner winding and an outer winding, the inner winding and the outer winding are coaxially arranged along the center of the primary iron core, and the phase sequence of the inner winding and the outer winding is opposite; the control system is electrically connected to the armature winding.

[0006] In a second aspect, the present application provides a static suspension method, comprising:

[0007] Acquire first information and second information, wherein the first information includes an inner winding target current, an inner winding feedback current, an outer winding target current, and an outer winding feedback current, and the second information includes an inner winding power supply frequency, an outer winding power supply frequency, and a suspension speed;

[0008] Calculating the current difference according to the first information, and obtaining the control voltage through adjustment processing, wherein the control voltage includes the inner winding control voltage and the outer winding control voltage;

[0009] Performing signal coordinate conversion processing according to the control voltage and the second information to obtain a transformation voltage, wherein the transformation voltage includes an inner winding transformation voltage and an outer winding transformation voltage;

[0010] Performing signal modulation processing according to the converted voltage to obtain a modulated signal;

[0011] Based on the modulation signal, three-phase current is applied to the inner winding and the outer winding respectively to output static suspension force, and a feedback signal is generated.

[0012] In the third aspect, the present application provides a test platform, including: a test bench; a height adjustment screw, a locking mechanism, a working surface component, a rotating component, a sensor component and a signal detection-processing unit; the height adjustment screw is vertically arranged on the test bench; the locking structure is arranged on the height adjustment screw, and the locking mechanism is connected to the height adjustment screw by a thread; the working surface component includes a first working surface and a second working surface, the first working surface is parallel to the test bench, the first working surface is threadedly connected to the height adjustment screw through the locking structure, the second working surface is arranged between the first working surface and the test bench through the locking mechanism, the first working surface and the second working surface are parallel to each other, and the gap between the first working surface and the second working surface is used to accommodate the axial flux electric suspension device; the rotating component is arranged through the center of the first working surface, and the rotating component is rotatably connected to the first working surface; the sensor component is respectively arranged on the rotating component and the stator component; the signal detection-processing unit is electrically connected to the sensor component and the control system respectively.

[0013] The beneficial effects of the present invention are:

[0014] The present invention adopts two sets of armature windings with opposite phase sequences. The suspension device has no self-rotation torque or tangential force output, and only outputs suspension force to the outside, so that electric repulsive suspension can be achieved. By directly converting electrical energy into the potential energy required for suspension, there is no need to first convert the electrical energy into kinetic energy and then convert the kinetic energy into the potential energy required for suspension. This provides a reference solution for electric suspension, static suspension and low-speed suspension.

[0015] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is an overall exploded view of the axial flux electric suspension device described in the embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the assembly of the axial magnetic flux electric suspension device described in the embodiment of the present application;

[0019] Figure 3 It is a phase diagram of the armature winding described in the embodiment of the present application;

[0020] Figure 4 This is a working schematic diagram of the axial magnetic flux electric suspension device described in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the suspension force and torque output of the axial magnetic flux electric suspension device described in the embodiment of the present application;

[0022] Figure 6 A schematic diagram of the energy conversion path of the axial magnetic flux electric suspension device described in the embodiment of the present application;

[0023] Figure 7 This is a control principle diagram of the axial flux electric suspension device described in the embodiment of the present application;

[0024] Figure 8 This is a schematic diagram of the test platform described in the embodiments of the present application;

[0025] Fig. 9 This is a flow chart of the static suspension method described in the embodiments of this application.

[0026] Markings in the figure: 1. stator component; 2. suspension component; 21. primary core; 211. outer tooth slot; 212. inner tooth slot; 22. armature winding; 221. inner winding; 222. outer winding; 3. control system; 31. control circuit unit; 32. inner power supply unit; 33. outer power supply unit; 34. inner inverter circuit unit; 35. outer inverter circuit unit; 36. signal acquisition unit; 5. test bench; 6. height adjustment screw; 61. locking mechanism; 7. working surface component; 71. first working surface; 72. second working surface; 8. rotating component; 81. rotating shaft; 82. bearing; 9. sensing component; 91. temperature sensor; 92. position sensor; 93. torque sensor; 10. signal detection-processing unit; 15. inner traveling wave magnetic field; 16. outer traveling wave magnetic field. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] Example 1

[0030] like Figure 1-4 and Figure 7 As shown, this embodiment provides an axial flux electric suspension device, including: a stator component 1, a suspension component 2 and a control system 3; the stator component 1 is a flat plate, and the material is copper (or aluminum) or other non-magnetic good conductors; the suspension component 2 is a disc-shaped configuration, and is arranged above the stator component 1, as shown in FIG. Figure 4As shown, g in the figure represents the suspension gap. The suspension component 2 includes a primary core 21 and an armature winding 22. The armature winding 22 is fixedly arranged on the end surface of the primary core 21 close to the stator component 1. The armature winding 22 includes an inner winding 221 and an outer winding 222. The inner winding 221 and the outer winding 222 are coaxially arranged along the center of the primary core 21, and the phase sequence of the inner winding 221 and the outer winding 222 is opposite; the control system 3 is electrically connected to the armature winding 22. Among them, after the inner winding is excited, an inner layer traveling wave magnetic field 15 that moves along a circle is generated in the inner layer of the air gap g between the primary 1 and the secondary 2; after the outer winding 12b is excited, an outer layer traveling wave magnetic field 16 that moves along a circle is generated in the outer layer of the air gap g between the suspension component 2 and the stator component 1; due to the opposite phase sequence of the excitation of the inner winding and the outer winding, the movement direction of the outer layer traveling wave magnetic field is opposite to that of the inner layer traveling wave magnetic field. The outer traveling wave magnetic field movement 16 moves in a clockwise direction, generating an axial repulsive force and a clockwise torque on the stator component 1; the inner traveling wave magnetic field movement 15 moves in a counterclockwise direction, generating an axial repulsive force and a counterclockwise torque on the stator component 1. Figure 5 Since the two torques are in opposite directions, the torques will cancel each other out, and the two axial repulsive forces will be superimposed on each other to provide a suspension force, thereby achieving static suspension of the stator component 1. In addition, the suspension force can be controlled by changing the current and frequency of the armature winding 22.

[0031] Combined with Figure 6 The energy conversion path of the axial magnetic flux electric suspension device is: the electric energy is directly converted into the potential energy required for suspension, without the kinetic energy conversion link in superconducting electric suspension or permanent magnet electric suspension. This device has the characteristics of electromagnetic direct drive, no need for additional power input and intermediate transmission mechanism, no mechanical loss, etc., and can be used as an important way to solve the problem of static or low-speed electric suspension.

[0032] Preferably, if Figure 1 and Figure 2 As shown, the primary core 21 is disc-shaped, and two layers of tooth slots are provided on the end surface of the primary core 21 facing the stator component 1 along the direction of increasing radius. The two layers of tooth slots are coaxially arranged along the primary core 21. The tooth slots arranged in the outer circle are referred to as outer layer tooth slots 211, and the tooth slots arranged in the inner circle are referred to as inner layer tooth slots 212. The inner layer winding 221 is wound in the inner layer tooth slots 212, and the outer layer winding 222 is wound in the outer layer tooth slots 211.

[0033] Preferably, the winding pitch of the inner winding 221 and the outer winding 222 is 1 slot.

[0034] Preferably, if Figure 7As shown, the control system 3 includes a control circuit unit 31, an inner power supply unit 32, an outer power supply unit 33, an inner inverter circuit unit 34, an outer inverter circuit unit 35 and a signal acquisition unit 36. Further, the inverters in the outer power supply unit 33 and the inner inverter circuit unit 34 are two-level voltage type inverters; the inner power supply unit 32 and the outer power supply unit 33 both output direct current; and the control circuit unit 31 includes a slip frequency controller. The control circuit unit 31 is electrically connected to the inner inverter circuit unit 34 and the outer inverter circuit unit 35, respectively, and inputs PWM1 signal and PWM2 signal respectively. The inner power supply unit 32 is loaded at both ends of the inner inverter circuit unit 34, and the outer power supply unit 33 is loaded at both ends of the outer inverter circuit unit 35 for power supply. The inner inverter circuit unit 34 is electrically connected to the inner winding 221, the outer inverter circuit unit 35 is electrically connected to the outer winding 222, and the signal acquisition unit 36 ​​is electrically connected to the armature winding 22 and the control circuit unit 31 respectively for collecting feedback current and suspension speed.

[0035] Example 2

[0036] like Fig. 9 As shown, this embodiment provides a static suspension method, comprising the following steps:

[0037] Step S100, obtaining first information and second information, the first information including inner winding target current, inner winding feedback current, outer winding target current and outer winding feedback current, and the second information including inner winding power supply frequency, outer winding power supply frequency and suspension speed.

[0038] Step S200: Calculate the current difference according to the first information, and obtain the control voltage through adjustment processing, where the control voltage includes the inner winding control voltage and the outer winding control voltage.

[0039] Step S300: performing signal coordinate conversion processing according to the control voltage and the second information to obtain a transformation voltage, wherein the transformation voltage includes an inner winding transformation voltage and an outer winding transformation voltage.

[0040] It should be noted that step S300 includes step S310, step S320 and step S330.

[0041] Step S310: construct a coordinate transformation model according to the second information.

[0042] It should be noted that step S310 includes step S311, step S312, step S313 and step S314.

[0043] Step S311: converting the power supply frequency of the inner winding and the power supply frequency of the outer winding to obtain electrical angular frequency data, wherein the electrical angular frequency data includes the electrical angular frequency of the inner winding and the electrical angular frequency of the outer winding.

[0044] Step S312: converting the data according to the suspension rotation speed to obtain mechanical angular frequency data.

[0045] Step S313: perform difference processing based on the electrical angular frequency data and the mechanical angular frequency data, and integrate the difference result to obtain the electrical angle data.

[0046] Step S314: construct a coordinate transformation model based on the electrical angle data.

[0047] Step S320: performing coordinate transformation processing on the inner winding control voltage based on the coordinate transformation model to obtain the inner winding transformation voltage.

[0048] Step S330: performing coordinate transformation processing on the outer winding control voltage based on the coordinate transformation model to obtain the outer winding transformation voltage.

[0049] Step S400: performing signal modulation processing according to the converted voltage to obtain a modulated signal.

[0050] Step S500: applying three-phase current output static suspension force to the inner winding and the outer winding respectively based on the modulation signal, and generating a feedback signal.

[0051] Specifically, Figure 7 As shown, the static suspension control method of the axial flux electric suspension device is as follows:

[0052] The armature winding of the axial flux electric suspension device consists of an inner winding and an outer winding. The control process for the inner winding is:

[0053] Input current sd1 *With feedback current i sd1 After the difference is made, the voltage U is obtained by the PID controller. d1 ;

[0054] Input current sq1 *With feedback current i sq1 After the difference is made, the voltage U is obtained by the PID controller. q1 ;

[0055] Voltage U d1 and U q1 After coordinate transformation (dq / αβ), we get voltage U α1 and U β1 ;

[0056] Voltage U α1 and U β1Generate a modulation signal PWM1 through space pulse width vector modulation (SVPWM);

[0057] The modulation signal PWM1 is used to control the inverter to output the three-phase current i a1 ,i b1 ,i c1 , used for the inner winding to generate the inner traveling wave magnetic field; at the same time, the three-phase current i a1 ,i b1 ,i c1 , after coordinate transformation (αβ / dq), the feedback current i is obtained α1 and i α1 .

[0058] Power frequency f s1 After conversion, the electrical angular frequency ω is obtained s1 ;

[0059] The axial flux electric suspension speed n (actually tends to 0) is converted to the mechanical angular frequency ω m ;

[0060] Electrical angular frequency ω s1 and mechanical angular frequency ω m After subtracting and integrating, we get the electrical angle θ 1 ;

[0061] Electrical angle θ 1 Used for coordinate transformation (dq / αβ) and coordinate transformation (αβ / dq).

[0062] The control process for the outer winding is:

[0063] Input current sd2 *With feedback current i sd2 After the difference is made, the voltage U is obtained by the PID controller. d2 ;

[0064] Input current sq2 *With feedback current i sq2 After the difference is made, the voltage U is obtained by the PID controller. q2 ;

[0065] Voltage U d2 and U q2 After coordinate transformation (dq / αβ), we get voltage U α2 and U β2 ;

[0066] Voltage U α2 and U β2 Generate a modulation signal PWM2 through space pulse width vector modulation (SVPWM);

[0067] The modulation signal PWM2 is used to control the inverter to output the three-phase current ia2 ,i b2 ,i c2 , used for the outer winding to generate an outer traveling wave magnetic field; at the same time, the three-phase current i a2 ,i b2 ,i c2 , after coordinate transformation (αβ / dq), the feedback current i is obtained α2 and i β2 .

[0068] Power frequency f s2 After conversion, the electrical angular frequency ω is obtained s2 ;

[0069] The axial flux electric suspension speed n (actually tends to 0) is converted to the mechanical angular frequency ω m ;

[0070] Electrical angular frequency ω s2 and mechanical angular frequency ω m After subtracting and integrating, we get the electrical angle θ 2 ;

[0071] Electrical angle θ 2 Used for coordinate transformation (dq / αβ) and coordinate transformation (αβ / dq).

[0072] The control process of the inner winding controls the size and frequency of the traveling wave magnetic field of the inner winding 221 through slip control; the control process of the outer winding controls the size and frequency of the traveling wave magnetic field of the outer winding 222 through slip control. Since the phase sequence of the inner winding 221 and the outer winding 222 is opposite, the movement directions of the inner winding traveling wave magnetic field and the outer winding traveling wave magnetic field are opposite, the torques generated cancel each other out, the repulsive forces are superimposed, and only the suspension force is output to the outside.

[0073] Example 3

[0074] like Figure 8As shown, this embodiment provides a test platform for testing various data of the axial flux electric suspension device, including: a test bench 5; a height adjustment screw 6, a locking mechanism 61, a working surface component 7, a rotating component 8, a sensor component 9 and a signal detection-processing unit 10; the height adjustment screw 6 is vertically arranged on the test bench 5; the locking mechanism 61 is arranged on the height adjustment screw 6, and the locking mechanism 61 is connected to the height adjustment screw 6 by a thread; the working surface component 7 includes a first working surface 71 and a second working surface 72, the first working surface 71 is parallel to the test bench 5, and the first working surface 71 is connected to the height adjustment screw 6 by a locking structure Through threaded connection, the second working surface 72 is arranged between the first working surface 71 and the test bench 5 through the locking mechanism 61, the first working surface 71 and the second working surface 72 are parallel to each other, and the gap between the first working surface 71 and the second working surface 72 is used to accommodate the axial magnetic flux electric suspension device; the rotating component 8 is arranged through the center of the first working surface 71, and the rotating component 8 is rotatably connected with the first working surface 71; the sensor component 9 is respectively arranged on the rotating component 8 and the stator component 1; the suspension component 2 is placed on the second working surface 72, and the position of the second working surface 72 relative to the test bench 5 can be adjusted through the locking mechanism 92 and the height adjustment screw 91. The stator component 1 is installed below the first working surface 71 through the rotating component 8, and the position of the first working surface 71 relative to the test bench 5 can be adjusted through the locking mechanism 61 and the height adjustment screw 6. The signal detection-processing unit 10 is electrically connected to the sensor component 9 and the control system 3 respectively. An inner winding control model and an outer winding control model are established in the control system 3 and converted into codes, which are downloaded to the corresponding control unit through the I / O interface to output the modulation signal PWM1 and the modulation signal PWM2.

[0075] Preferably, the rotating component 8 includes a rotating shaft 81 and a bearing 82 . The bearing 82 is fixedly disposed at the center of the first working surface 71 . The rotating shaft 81 and the bearing 82 cooperate with each other and penetrate through the bearing 82 .

[0076] Preferably, the sensor components include a temperature sensor 91, a position sensor 92 and a torque sensor 93. The torque sensor 93 is fixedly arranged on the lower end surface of the rotating shaft 81, the position sensor 92 is fixedly arranged on the lower end surface of the torque sensor 93, and the temperature sensor 91 is fixedly arranged on the stator component 1. The torque sensor 93 is used to detect the torque and suspension force exerted on the stator component 1, and the feedback is fed back to the control system 3 through the signal detection-processing unit 10, and the real-time information is further displayed and saved; the position sensor 92 is used to detect the position information of the suspension component 2, and the feedback is fed back to the control system 3 through the signal detection-processing unit 10, and the real-time information is further displayed and saved; the temperature sensor 91 is used to detect the temperature rise of the stator component 1, and the feedback is fed back to the control system 3 through the signal detection-processing unit 10, and the real-time information is further displayed and saved.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An axial magnetic flux electric suspension device, characterized in that: include: Stator component (1); A suspension component (2), the suspension component (2) being arranged above the stator component (1), the suspension component (2) comprising a primary iron core (21) and an armature winding (22), the armature winding (22) being fixedly arranged on an end surface of the primary iron core (21) close to the stator component (1), the armature winding (22) comprising an inner layer winding (221) and an outer layer winding (222), the inner layer winding (221) and the outer layer winding (222) being coaxially arranged along the center of the primary iron core (21), and the inner layer winding (221) and the outer layer winding (222) having opposite phase sequences; A control system (3), wherein the control system (3) is electrically connected to the armature winding (22).

2. The axial magnetic flux electric suspension device according to claim 1 is characterized in that: The primary core (21) is disc-shaped. Two layers of tooth slots are provided on the end surface of the primary core (21) facing the stator component (1). The two layers of tooth slots are coaxially arranged along the primary core (21). The tooth slots arranged in the outer circle are outer layer tooth slots (211), and the tooth slots arranged in the inner circle are inner layer tooth slots (212). The inner layer winding (221) is wound in the inner layer tooth slots (212), and the outer layer winding (222) is wound in the outer layer tooth slots (211).

3. The axial flux electric suspension device according to claim 2 is characterized in that: The winding pitch of the inner layer winding (221) and the outer layer winding (222) is 1 slot.

4. The axial magnetic flux electric suspension device according to claim 1, characterized in that: The control system (3) comprises a control circuit unit (31), an inner power supply unit (32), an outer power supply unit (33), an inner inverter circuit unit (34), an outer inverter circuit unit (35) and a signal acquisition unit (36); the control circuit unit (31) is electrically connected to the inner inverter circuit unit (34) and the outer inverter circuit unit (35), respectively; the inner power supply unit (32) is loaded at both ends of the inner inverter circuit unit (34); the outer power supply unit (33) is loaded at both ends of the outer inverter circuit unit (35); the inner inverter circuit unit (34) is electrically connected to the inner winding (221); the outer inverter circuit unit (35) is electrically connected to the outer winding (222); and the signal acquisition unit (36) is electrically connected to the armature winding (22) and the control circuit unit (31), respectively.

5. A static suspension method, using the axial flux electric suspension device according to any one of claims 1 to 4, characterized in that: include: Acquire first information and second information, wherein the first information includes an inner winding target current, an inner winding feedback current, an outer winding target current, and an outer winding feedback current, and the second information includes an inner winding power supply frequency, an outer winding power supply frequency, and a suspension speed; Calculating the current difference according to the first information, and obtaining the control voltage through adjustment processing, wherein the control voltage includes the inner winding control voltage and the outer winding control voltage; Performing signal coordinate conversion processing according to the control voltage and the second information to obtain a transformation voltage, wherein the transformation voltage includes an inner winding transformation voltage and an outer winding transformation voltage; Performing signal modulation processing according to the converted voltage to obtain a modulated signal; Based on the modulation signal, three-phase current is applied to the inner winding and the outer winding respectively to output static suspension force, and a feedback signal is generated.

6. The static suspension method according to claim 5, characterized in that: Performing signal coordinate conversion processing according to the control voltage and the second information to obtain a transformed voltage includes: Constructing a coordinate transformation model according to the second information; Performing coordinate transformation processing on the inner winding control voltage based on the coordinate transformation model to obtain the inner winding transformation voltage; The outer winding control voltage is subjected to coordinate transformation processing based on the coordinate transformation model to obtain the outer winding transformation voltage.

7. The static suspension method according to claim 6, characterized in that: Constructing a coordinate transformation model according to the second information includes: Converting the power supply frequency of the inner winding and the power supply frequency of the outer winding to obtain electrical angular frequency data, wherein the electrical angular frequency data includes the electrical angular frequency of the inner winding and the electrical angular frequency of the outer winding; Performing conversion processing according to the suspension rotation speed to obtain mechanical angular frequency data; Performing a difference process on the electrical angular frequency data and the mechanical angular frequency data, and integrating the difference result to obtain electrical angle data; A coordinate transformation model is constructed based on the electrical angle data.

8. A test platform for testing the axial flux electric suspension device according to any one of claims 1 to 4, characterized in that: include: Test bench (5); A height-adjusting screw rod (6), wherein the height-adjusting screw rod (6) is vertically arranged on the test bench (5); A locking mechanism (61), wherein the locking mechanism (61) is arranged on the height-adjusting screw rod (6), and the locking mechanism (61) and the height-adjusting screw rod (6) are threadedly connected; A working surface component (7), the working surface component (7) comprising a first working surface (71) and a second working surface (72), the first working surface (71) and the test bench (5) being parallel to each other, the first working surface (71) being threadedly connected to the height adjustment screw (6) via the locking mechanism (61), the second working surface (72) being arranged between the first working surface (71) and the test bench (5) via the locking mechanism (61), the first working surface (71) and the second working surface (72) being parallel to each other, and the gap between the first working surface (71) and the second working surface (72) being used to accommodate the axial magnetic flux electric suspension device; a rotating component (8), the rotating component (8) being arranged through the center of the first working surface (71), and the rotating component (8) being rotatably connected to the first working surface (71); a sensing component (9), wherein the sensing component (9) is respectively arranged on the rotating component (8) and the stator component (1); and A signal detection-processing unit (10), wherein the signal detection-processing unit (10) is electrically connected to the sensing component (9) and the control system (3) respectively.

9. The test platform according to claim 8, characterized in that: include: The rotating component (8) comprises a rotating shaft (81) and a bearing (82); the bearing (82) is fixedly arranged at the center of the first working surface (71); the rotating shaft (81) and the bearing (82) cooperate with each other and are arranged through the bearing (82).

10. The test platform according to claim 9, characterized in that: include: The sensor component comprises a temperature sensor (91), a position sensor (92) and a torque sensor (93); the torque sensor (93) is fixedly arranged on the lower end surface of the rotating shaft (81); the position sensor (92) is fixedly arranged on the lower end surface of the torque sensor (93); and the temperature sensor (91) is fixedly arranged on the stator component (1).

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