CN116260303A

CN116260303A - Magnetic suspension high-speed axial flow fan device

Info

Publication number: CN116260303A
Application number: CN202310254461.0A
Authority: CN
Inventors: 王孝伟
Original assignee: Foshan Hongwei Technology Co ltd
Current assignee: Foshan Hongwei Technology Co ltd
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-06-13

Abstract

The invention discloses a magnetic suspension high-speed axial flow fan device, which comprises a magnetic suspension high-speed axial flow fan, wherein the magnetic suspension high-speed axial flow fan comprises a magnetic suspension shell, a stator driving controller and an impeller, an annular cavity is arranged in the magnetic suspension shell, the impeller is arranged in the annular cavity, a permanent magnet is fixedly connected with the outer side of the impeller, the stator driving controller comprises an upper stator and a lower stator, the upper stator and the lower stator are respectively arranged at positions, which are positioned at two sides of the impeller, of the inner side of the magnetic suspension shell, and a double-stator single-rotor permanent magnet motor is formed by the permanent magnet, the upper stator and the lower stator. The upper stator and the lower stator are arranged in mirror image parallel and matched with the permanent magnets to form the double-stator single-rotor permanent magnet motor, the tangential moment generated by the upper stator and the lower stator is the same under the same current, and the axial natural magnetic levitation forces are opposite, so that the impeller can be arranged in the center of a natural magnetic levitation shell and the magnetic levitation shell.

Description

Magnetic suspension high-speed axial flow fan device

Technical Field

The present disclosure relates to the field of rotary precision machinery, and in particular, to a magnetic suspension high-speed axial flow fan device.

Background

The invention relates to a magnetic suspension high-speed axial flow fan, which has extremely wide application. The axial flow fan is used for improving the pressure difference of the gas at the input port and the gas at the output port of the axial flow fan. The rotor of an axial flow fan rotates continuously at a high speed, and it is generally desired that the flow rate is large and the wind pressure is large. Because the rotor rotates at a high speed, the rotor impeller thereof rubs with air at a high speed, and thus vibration and noise are relatively large. In particular, the rigidity and dynamic balance accuracy of the impeller are limited, so that the bearing of the high-speed axial flow fan is subjected to relatively large impact vibration. The higher the rotation speed of the fan is, the higher the output power of the fan is, and the smaller the volume of the fan is. The higher the rotation speed is, the larger the vibration and noise are, and the lower the bearing life is. The rotating speed of the small fan is 5000-12000 r/min. In practical applications, the bearings of fans often become bottlenecks that affect their increased rotational speed, increased power capacity, and increased efficiency and life. The single-stage wind pressure ratio of the axial flow fan cannot be made higher, and the high-power fan can only use multi-stage impellers to increase the wind pressure ratio and expand the power capacity.

The vibration and noise of the fan are related to the rotating speed of the rotor and the natural frequency of the rotor, and when the rotating speed of the rotor is close to or equal to the natural frequency of the rotor, the system resonates to generate a severe vibration phenomenon. The rotational speed at which the resonance phenomenon occurs is referred to as a critical rotational speed of the shaft. For fans with multi-stage impellers, the simulation analysis of resonance phenomenon is very difficult due to the complex structure, so the design of the high-speed fans is also a bottleneck.

By adopting the traditional air bearing or liquid suspension technology, the vibration and noise indexes of the fan can be greatly improved, and the efficiency and service life of the fan can be improved. However, the conventional air bearing or liquid suspension bearing has large volume, and an additional air pump or hydraulic pump special for the bearing is also required, so that the controller system has large volume, low reliability, additional power loss and high production cost. And most environments or application scenarios cannot employ conventional air bearing or liquid suspension techniques. For example: chemical, medical, aerospace, and many industrial scenarios are not available. Civilian use is not desirable at all due to the cost being too high. Furthermore, air bearing or liquid suspension techniques, where friction of metal with air or liquid still exists, are not thorough suspension techniques.

If the traditional magnetic suspension bearing technology is adopted, the traditional magnetic suspension bearing is large in size, the controller is large in size, the additional power loss is large, and the production cost is high. In general, to magnetically levitate the rotor of an electric motor, conventional magnetic bearings are required that are comparable in size to the motor. Besides high price, the large volume is also a reason that the traditional magnetic suspension bearing technology cannot be popularized.

Disclosure of Invention

The present disclosure provides a magnetic levitation high-speed axial flow fan device to solve one of the technical problems recognized by the inventor.

The utility model provides a high-speed axial fan device of magnetic suspension, including the high-speed axial fan of magnetic suspension, the high-speed axial fan of magnetic suspension includes magnetic suspension casing, stator drive controller and impeller, be provided with annular cavity in the magnetic suspension casing, air intake and air outlet have been seted up at the both ends of magnetic suspension casing, air intake and air outlet with annular cavity link up and are connected, the impeller set up in the annular cavity, the outside fixedly connected with permanent magnet of impeller, stator drive controller includes upper stator and lower stator, upper stator and lower stator set up respectively in the magnetic suspension casing inboard is located the position of impeller both sides, the permanent magnet is 4 utmost point fan-shaped permanent magnet rotor bodies, upper stator and lower stator are 6 utmost point fan-shaped motor stators, through permanent magnet, upper stator and lower stator constitution double stator single rotor permanent magnet motor.

Preferably, the impeller further comprises 6 auxiliary wing blades, wherein the auxiliary wing blades are uniformly distributed on the middle part of the impeller and the axial end face of the permanent magnet.

Preferably, the upper stator and the lower stator have the same structure, and the upper stator and the lower stator are arranged in a mirror symmetry manner.

Preferably, the upper stator comprises a stator core and a plurality of windings, the windings are connected in series, the stator core is of a circular ring structure, the stator core is divided into 6 magnetic poles, each magnetic pole is provided with one winding, the windings comprise U1, U2, V3, V4, W5 and W6, the windings U1, U2, V3, V4, W5 and W6 are symmetrically arranged, the windings U1 and U2 are connected in parallel to form a U phase, the windings V3 and V4 are connected in parallel to form a V phase, the windings W5 and W6 are connected in parallel to form a W phase, and the windings of the U phase, the V phase and the W phase corresponding to the upper stator and the lower stator are connected in parallel to form a double-stator three-phase winding.

Preferably, the number of pole slots of the stator core is Z, z=6, an angle of a sector area occupied by each stator tooth and each winding slot is (0.9-0.75) 360 °/z= (0.9-0.75) 360 °/6= (0.9-0.75) 60 °, a pole pair number of the permanent magnets is P, 2p=4, an angle of a sector area occupied by each pole permanent magnet is (1.0-0.85) 360 °/2p= (1.0-0.85) 360 °/4= (1.0-0.85) 90 °, a gap exists between pole slots of adjacent upper and lower stators and between poles of adjacent permanent magnets, and the gap is filled with an insulating material.

Preferably, the air inlet and the air outlet are connected with an air inlet pipeline and an air outlet pipeline, and the magnetic suspension shell, the impeller, the air inlet pipeline and the air outlet pipeline are formed by combining one or two of engineering plastics or non-magnetic conductive metal materials.

Preferably, the engineering plastic is one or a combination of more of modified polytetrafluoroethylene, polyimide and silicon-based high polymer materials.

Preferably, the permanent magnet is made of sintered neodymium iron boron or bonded neodymium iron boron material.

Preferably, a motor driving circuit module and a control module are arranged in the stator driving controller, the motor driving circuit module is electrically connected with the upper stator and the lower stator, and the control module is electrically connected with the motor driving circuit module.

Preferably, the magnetic suspension high-speed axial flow fan comprises at least one magnetic suspension high-speed axial flow fan, and at least one magnetic suspension high-speed axial flow fan is arranged in parallel.

The beneficial effects of the present disclosure mainly lie in: the upper stator and the lower stator are arranged in mirror image parallel and matched with the permanent magnets to form the double-stator single-rotor permanent magnet motor, the tangential moment generated by the upper stator and the lower stator is the same under the same current, and the axial natural magnetic levitation forces are opposite, so that the impeller can be arranged in the center of a natural magnetic levitation shell and the magnetic levitation shell.

It is to be understood that both the foregoing general description and the following detailed description are for purposes of example and explanation and are not necessarily limiting of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the present disclosure. Meanwhile, the description and drawings are used to explain the principles of the present disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of a magnetic levitation high-speed axial flow fan according to an embodiment of the present disclosure;

FIG. 2 is a front view of an impeller structure of an embodiment of the present disclosure;

FIG. 3 is a side view of an impeller structure of an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of upper and lower stator windings of an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a modular tandem configuration of an embodiment of the present disclosure;

icon: 100-magnetic suspension high-speed axial flow fan; 1-a magnetic suspension shell; 11-an annular cavity; 2-an impeller; 21-paraptera leaves; 31-upper stator; 32-a lower stator; 311-stator core; 312-winding; 313-insulating material; 4-permanent magnet.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present disclosure.

Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.

In the description of the present disclosure, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.

Examples

As shown in fig. 1, the embodiment provides a device of a magnetic suspension high-speed axial flow fan 100, which comprises a magnetic suspension high-speed axial flow fan 100, wherein the magnetic suspension high-speed axial flow fan 100 comprises a magnetic suspension shell 1, a stator driving controller and an impeller 2, two ends of the magnetic suspension shell 1 are provided with a circular air inlet and an air outlet, an annular cavity 11 is arranged in the magnetic suspension shell 1, the annular cavity 11 is in through connection with the air inlet and the air outlet, the middle part of the annular cavity 11 is provided with an inner cavity, the area corresponding to the air inlet and the air outlet is located in the semi-closed area at the edge of the magnetic suspension shell 1 is an outer cavity, the impeller 2 is arranged in the magnetic suspension shell 1, 6 fan blades are arranged on the impeller 2, the area of the tail end of the impeller 2, which is located in the outer cavity, is fixedly provided with a permanent magnet 4, the permanent magnet 4 is of a circular ring structure, the permanent magnet 4 is a 4-pole fan-shaped permanent magnet rotor body and comprises four fan-shaped magnetic poles, the stator driving controller comprises an upper stator 31 and a lower stator 32, the upper stator 31 and the lower stator 32 are respectively arranged in the areas, located on the outer ring of the annular cavity 11, of the inner side of the magnetic suspension shell 1, are respectively arranged on two sides of the permanent magnet 4, the upper stator 31 and the lower stator 32 are 6-pole fan-shaped motor stators, the upper stator 31 and the lower stator 32 are arranged in a mirror symmetry mode, the upper stator 31 and the lower stator 32 are connected in parallel, the magnetic poles of the permanent magnet 4, the upper stator 31 and the lower stator 32 are uniformly distributed in a circumference mode, the diameters of the uniformly distributed circumferences coincide, and the permanent magnet 4, the upper stator 31 and the lower stator 32 form a double-stator single-rotor permanent magnet motor. The impeller 2 can naturally suspend magnetic levitation in the magnetic levitation shell 1 by virtue of the upper stator 31 and the lower stator 32 which are arranged in a mirror symmetry manner and are electrified with the same current, the generated tangential moment is the same, and the axial natural magnetic levitation force is opposite.

As shown in fig. 2-3, the impeller further comprises 6 auxiliary fins 21, and the auxiliary fins 21 are uniformly distributed in the middle of the impeller 2 and on the axial end face of the permanent magnet 4. Specifically, two auxiliary wing blades 21 are arranged on two end faces of the impeller 2, which are positioned in the inner cavity, four other auxiliary wing blades 21 are arranged on the outer circumferential surface of the impeller 2, which is positioned in the outer cavity of the impeller 2, the length of each auxiliary wing blade 21 is 0.2-0.5 mm, when the impeller 2 rotates at a high speed, the auxiliary wing blades 21 also drive gas to rotate at a high speed, the pressure generated by the high-speed gas is directed to the inner cavity of the annular cavity 11, meanwhile, the pressure generated by the high-speed gas is also directed to the upper end and the lower end of the annular cavity 11, that is, when the impeller 2 rotates at a high speed, a small part of air flow enters from the inner cavity of the annular cavity 11 and is directed to the inner cavity of the annular cavity 11, meanwhile, the pressure is directed to the upper end and the lower end of the annular cavity 11, and can generate effective radial air suspension force to suspend the whole impeller 2.

As shown in fig. 4, the structures of the upper stator 31 and the lower stator 32 are the same, the upper stator 31 and the lower stator 32 are symmetrically arranged in a mirror image manner, wherein the upper stator 31 comprises a stator core 311 and a plurality of windings 312, the stator core 311 is in a circular ring structure, the stator core 311 is divided into 6 fan-shaped magnetic poles, the 6 magnetic poles are uniformly distributed on the stator core 311, each magnetic pole is provided with one winding 312, each winding 312 comprises U1, U2, V3, V4, W5 and W6, the windings U1 and U2, V3 and V4, W5 and W6 are symmetrically arranged, each winding 312 is sequentially arranged in series, the windings U1 and U2 are connected in parallel to form a U phase, the windings V3 and V4 are connected in parallel to form a V phase, the windings W5 and W6 are connected in parallel to form a W phase, and the windings 312 of the corresponding U phase, V phase and W phase of the upper stator 31 and the lower stator 32 are connected in parallel to form a double-stator winding. Specifically, two windings U1 and U2 of 180 ° symmetry of the U-phase are connected in parallel, and the tail end is connected to the midpoint of the three-phase winding 312 to form a parallel branch of the U-phase winding 312; two windings V3 and V4 which are 180 DEG symmetrical to each other are connected in parallel with each other, and the tail end of the windings is also connected with the midpoint of the three-phase winding 312 to form a parallel branch of the V-phase winding 312; two windings 312 of W5 and W6 which are 180 DEG symmetrical are connected in parallel, and the tail end of the windings is also connected with the midpoint of the three-phase winding 312 to form a parallel branch of the W-phase winding 312; thus, U, V, W three-phase winding 312 has a 180 symmetrical parallel branch for each phase. When the air gap is uniform, the current in any 180-degree symmetrical parallel branch is the same, when the air gap is deviated, the air gap between certain 180-degree symmetrical parallel branches is deviated, the counter-potential of the side with smaller air gap is increased, the counter-potential of the side with larger air gap is decreased, then the current in the side with smaller air gap is decreased, and the current in the side with larger air gap is increased, so that the electromagnetic pulling force of the side with smaller current is decreased, and the electromagnetic pulling force of the side with larger current is increased. Thus, the permanent magnet 4 is driven to do radial movement in the direction of restoring the air gap uniformity, and the natural electromagnetic magnetic suspension function is achieved. Each phase of the three-phase winding 312 has a 180-degree symmetrical parallel branch, so that a special three-phase winding 312 is formed, and the three-phase winding 312 can actively, naturally and uniformly restore or stabilize the rotor at the central position from the radial 6-pole uniformly distributed position when the motor rotates, which is the radial natural electromagnetic magnetic suspension function.

In the prior art, the upper stator 31 and the lower stator 32 jointly drive the permanent magnet 4 positioned in the impeller 2 to rotate, but the upper stator 31 and the lower stator 32 have axial attractive force on the permanent magnet 4, the attractive force on two sides is equal only when the permanent magnet 4 is axially centered on the stator cores 311 on two sides, and when any deviation exists between the air gaps on the upper side and the lower side, the permanent magnet 4 is sucked to the side with small air gap, so that in a static state and an initial state, the permanent magnet rotor is sucked to the side with small air gap randomly. The permanent magnet 4 is axially unstable and there must be active axial magnetic levitation to axially levitate the permanent magnet 4. The three-phase winding 312 formed by the iron core of the upper stator 31 and the three-phase winding 312 formed by the iron core of the lower stator 32 are connected in parallel in a mirror direction, the counter potential of the three-phase winding 312 on the side with a small air gap is increased, the three-phase current is decreased, on the contrary, the counter potential of the three-phase winding 312 on the side with a large air gap is decreased, the three-phase current is increased, the axial pulling force on the side with a large air gap is increased, the axial pulling force on the side with a small air gap is decreased, the axial air gap is inevitably changed in the direction of decreasing the deviation, and the air gap deviation is stabilized. Therefore, the invention has the axial natural magnetic suspension function.

Let the number of pole slots of the stator core be Z, z=6, the angle of each stator tooth and winding slot occupy the sector area be (0.9-0.75) 360 °/z= (0.9-0.75) 360 °/6= (0.9-0.75) 60 °, the pole pair number of the permanent magnets be P, 2p=4, the angle of each pole permanent magnet occupy the sector area be (1.0-0.85) 360 °/2p= (1.0-0.85) 360 °/4= (1.0-0.85) 90 °, there is a gap between the pole slots of adjacent upper and lower stators and between the poles of adjacent permanent magnets, and the gap is filled with insulating material 313.

The motor of the magnetic suspension high-speed axial flow fan is a fractional slot concentrated winding motor, the pole slot number is not limited to the combination of 2p=4 and z=6, and the pole slot combinations of 2p=2, z= 3,2P =4, z= 3,2P =8, z= 6,2P =8, z= 9,2P =10, z= 9,2P =10, z=12 and the like are applicable.

Further, the air inlet and the air outlet are connected with an air inlet pipeline and an air outlet pipeline, and the magnetic suspension shell 1, the impeller 2, the air inlet pipeline and the air outlet pipeline are formed by combining one or two of engineering plastics or non-magnetic conductive metal materials. The permanent magnet 4 for transmitting torque is sealed inside the blade of the impeller 2, so that the permanent magnet 4 is prevented from being corroded by gas.

Wherein the engineering plastic is one or a combination of more of modified polytetrafluoroethylene, polyimide and silicon-based high polymer materials.

Further, the permanent magnet 4 is made of sintered neodymium iron boron, bonded neodymium iron boron materials or other high magnetic energy product permanent magnets 4, back iron is not needed, and the weight of the rotating body is reduced.

Further, a motor driving circuit module and a control module are arranged in the stator driver, the motor driving circuit module is electrically connected with the upper stator 31 and the lower stator 32, the control module is electrically connected with the motor driving circuit module, parameters such as the rotating speed of the impeller 2 and the energizing current of the stator are detected in real time through the control module, the flow of the air inlet and the air outlet is calculated through the rotating speed, the pressure of the air inlet and the air outlet is calculated through the rotating speed and the current, parameters such as power change and moment change are calculated through the instantaneous change of the rotating speed and the current, and then the control module instructs the motor driving circuit module to adjust the input current and voltage parameters, so that the high-efficiency and safe operation of the magnetic suspension high-speed axial flow fan 100 is ensured.

In one embodiment, as shown in fig. 5, at least one magnetic suspension high-speed axial flow fan 100 is included, and at least one magnetic suspension high-speed axial flow fan 100 is arranged in parallel. The wind pressure and the flow rate can be improved through modularized serial connection, the power capacity of the wind power generation device is improved, the adjustment of automatically changing the wind pressure, the flow rate and the power is achieved through independent adjustment of each module, the synthesis of wind fluid is achieved through independent adjustment of the rotation speed and the phase difference of each module, and the effect of inhibiting vibration and noise is achieved. The invention increases the serial modules by 2 times, the wind pressure and flow of the fan are increased by 2 times, and the power capacity is increased by 2 times; and by adopting more stages of modules, larger wind pressure, flow and power capacity of the fan can be obtained.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. The utility model provides a high-speed axial fan device of magnetic suspension, its characterized in that includes the high-speed axial fan of magnetic suspension, the high-speed axial fan of magnetic suspension includes magnetic suspension casing, stator drive controller and impeller, be provided with annular cavity in the magnetic suspension casing, air intake and air outlet have been seted up at the both ends of magnetic suspension casing, air intake and air outlet with annular cavity link up and are connected, the impeller set up in the annular cavity, the outside fixedly connected with permanent magnet of impeller, stator drive controller includes upper stator and lower stator, upper stator and lower stator set up respectively in the magnetic suspension casing inboard is located the position of impeller both sides, the permanent magnet is 4 utmost point fan-shaped permanent magnet rotor body, upper stator and lower stator are 6 groove fan-shaped motor stator, through permanent magnet, upper stator and lower stator constitution double stator single rotor permanent magnet motor.

2. The magnetic suspension high-speed axial flow fan device according to claim 1, further comprising 6 auxiliary wing blades, wherein the auxiliary wing blades are uniformly distributed on the middle part of the impeller and the axial end face of the permanent magnet.

3. The magnetic levitation high-speed axial flow fan device of claim 1, wherein the upper stator and the lower stator have the same structure, and the upper stator and the lower stator are arranged in mirror symmetry.

4. A magnetic suspension high-speed axial flow fan device according to claim 3, wherein the upper stator comprises a stator core and a plurality of windings, the windings are connected in series, the stator core is of a circular ring structure, the stator core is divided into 6 magnetic poles, each magnetic pole is provided with one winding, the windings comprise U1, U2, V3, V4, W5 and W6, the windings U1 and U2, V3 and V4, W5 and W6 are symmetrically arranged, the windings U1 and U2 are connected in parallel to form a U phase, the windings V3 and V4 are connected in parallel to form a V phase, the windings W5 and W6 are connected in parallel to form a W phase, and the windings of the corresponding U phase, V phase and W phase of the upper stator and the lower stator are connected in parallel to form a double-stator three-phase winding.

5. The magnetic levitation high-speed axial flow fan apparatus of claim 4, wherein the number of slots of the stator core is Z, z=6, the angle of each stator tooth and winding slot occupying the sector area is (0.9-0.75) 360 °/z= (0.9-0.75) 360 °/6= (0.9-0.75) 60 °, the pole pair number of the permanent magnets is P, 2p=4, the angle of each pole permanent magnet occupying the sector area is (1.0-0.85) 360 °/2 p= (1.0-0.85) 360 °/4= (1.0-0.85) 90 °, a gap exists between adjacent stator teeth of the upper stator and the lower stator, and the gap is filled with an insulating material.

6. The magnetic suspension high-speed axial flow fan device according to claim 1, wherein the air inlet and the air outlet are connected with an air inlet pipeline and an air outlet pipeline, and the magnetic suspension shell, the impeller, the air inlet pipeline and the air outlet pipeline are formed by combining one or two of engineering plastics or non-magnetic conductive metal materials.

7. The magnetic suspension high-speed axial flow fan device according to claim 6, wherein the engineering plastic is one or a combination of more of modified polytetrafluoroethylene, polyimide and silicon-based high polymer materials.

8. A magnetic levitation high-speed axial flow fan apparatus as defined in claim 1, wherein the permanent magnet is made of sintered neodymium-iron-boron or bonded neodymium-iron-boron material.

9. The magnetic levitation high-speed axial flow fan device according to claim 1, wherein a motor driving circuit module and a control module are arranged in the stator driving controller, the motor driving circuit module is electrically connected with the upper stator and the lower stator, and the control module is electrically connected with the motor driving circuit module.

10. A magnetic levitation high-speed axial flow fan apparatus as defined in any one of claims 1-9, comprising at least one magnetic levitation high-speed axial flow fan, at least one of said magnetic levitation high-speed axial flow fans being juxtaposed.