CN116123116A - Natural magnetic suspension high-speed axial flow fan - Google Patents
Natural magnetic suspension high-speed axial flow fan Download PDFInfo
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- CN116123116A CN116123116A CN202310256039.9A CN202310256039A CN116123116A CN 116123116 A CN116123116 A CN 116123116A CN 202310256039 A CN202310256039 A CN 202310256039A CN 116123116 A CN116123116 A CN 116123116A
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- stator
- magnetic suspension
- impeller
- phase windings
- axial flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
Abstract
The invention relates to the technical field of rotary precision machinery, in particular to a natural magnetic suspension high-speed axial flow fan which comprises a cavity, wherein the upper side and the lower side of the cavity are opened, stator driving controllers are arranged on the upper side and the lower side of the interior of the cavity, and an impeller is arranged between the two stator driving controllers; the stator driving controller comprises a stator and three-phase windings arranged on the stator; the impeller comprises a plurality of blades and permanent magnets surrounding the outer sides of the blades; the permanent magnet is a 4-pole fan-shaped permanent magnet rotor body; the three-phase windings form 6 magnetic poles, the three-phase windings are connected in series and parallel, and two three-phase windings positioned on the upper side and the lower side are connected in parallel according to mirror images; the electromagnetic support of the lossless high-speed impeller can be realized by utilizing natural electromagnetic magnetic suspension, so that the impeller rotates at a high speed and interacts with current in a stator winding to generate effective radial electromagnetic active natural magnetic suspension and axial passive magnetic suspension.
Description
Technical Field
The invention relates to the technical field of rotary precision machinery, in particular to a natural magnetic suspension high-speed axial flow fan.
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. The magnetic suspension with low cost is realized, which can be called as a world-grade difficult problem.
Disclosure of Invention
The invention aims to provide a natural magnetic suspension high-speed axial flow fan, which can realize the electromagnetic support of a lossless high-speed impeller by utilizing natural electromagnetic magnetic suspension, so that the impeller rotates at a high speed and interacts with current in a stator winding to generate effective radial electromagnetic active natural magnetic suspension and axial passive magnetic suspension.
The aim of the invention is achieved by the following technical scheme:
the natural magnetic suspension high-speed axial flow fan comprises a cavity, wherein the upper side and the lower side of the cavity are opened, stator driving controllers are arranged on the upper side and the lower side of the interior of the cavity, and an impeller is arranged between the two stator driving controllers;
the stator driving controller comprises a stator and three-phase windings arranged on the stator;
the impeller comprises a plurality of blades and permanent magnets surrounding the outer sides of the blades;
the permanent magnet is a 4-pole fan-shaped permanent magnet rotor body;
the three-phase windings form 6 magnetic poles, the three-phase windings are connected in series and parallel, and two three-phase windings positioned on the upper side and the lower side are connected in parallel according to mirror images;
the permanent magnet is a 10-pole fan-shaped permanent magnet rotor body;
the three-phase windings form 12 magnetic poles, the three-phase windings are connected in series and parallel, and two three-phase windings positioned on the upper side and the lower side are connected in parallel according to mirror images;
a driving and controlling circuit is arranged in the stator driving controller;
the impeller also comprises a plurality of magnetic suspension short blades arranged on the upper side surface and the lower side surface of the impeller;
the fans can be connected in series in parallel.
The beneficial effects of the invention are as follows:
radial active natural magnetic levitation technology, axial active natural magnetic levitation technology, radial passive magnetic levitation technology, radial and axial liquid levitation technology or gas levitation technology. The complete natural suspension technology has excellent synchronous motor driving function;
the magnetic suspension fan device has high space utilization rate of the structure and small axial size, is favorable for forming a flat integral structure, and is applicable to more working scenes. The magnetic suspension fan device provided by the invention is internally provided with the driving and computer control circuit, has compact and simple structure, and has the functions of high reliability, high control performance, intelligent diagnosis and the like.
When the traditional fan rotates at a high speed, a great amount of friction loss and noise are generated, the problems of principle bearing friction loss and limited dynamic balance precision of the impeller and dynamic unbalance caused by principle unbalanced load are also caused, and the problems generate principle vibration, noise and additional loss, so that the service life of the fan is seriously influenced. The natural suspension technology of the invention has zero bearing friction loss and is insensitive to the dynamic balance precision of the impeller, or the natural suspension technology has the capability of naturally absorbing or inhibiting principle vibration, noise and additional loss. The invention can improve the power density of the pump by improving the rotating speed of the impeller, greatly simplify the structure of the pump, reduce the production cost, reduce the vibration noise and the additional loss and improve the overall performance. Compared with the traditional compressor, the invention can improve the rotating speed from 3000r/min to 30000r/min, namely 10 times, and realize the obvious aims of 10 times of power improvement, 10 times of volume reduction and nearly 10 times of cost reduction.
The invention does not need any additional sensor and controller, and naturally comprises: radial active natural magnetic levitation technology, axial active natural magnetic levitation technology, radial passive magnetic levitation technology and axial passive magnetic levitation technology, radial and axial liquid or gas levitation technology. The motor has the most complete fan blade suspension function and has the excellent motor driving control function without a position sensor.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of a natural magnetic suspension high-speed axial flow fan structure of the invention;
FIG. 2 is a schematic view of the impeller structure of the present invention;
FIG. 3 is a three-phase winding wiring schematic of the present invention;
FIG. 4 is a schematic diagram of a three-phase winding connection structure of the present invention;
FIG. 5 is a schematic view of the impeller structure of the present invention;
FIG. 6 is a schematic diagram of a single set of natural magnetic levitation high-speed axial flow fans according to the invention;
FIG. 7 is a schematic diagram of a natural magnetic levitation high-speed axial flow fan double-group structure of the invention;
FIG. 8 is a schematic diagram of a natural magnetic levitation high-speed axial flow fan multi-group structure according to the present invention.
In the figure: a cavity 1; a stator drive controller 2; a stator 21; a three-phase winding 22; an impeller 3; a permanent magnet 31; a vane 32; magnetic levitation of short leaf 33.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 6, a first embodiment of the present invention will be described in detail;
the natural magnetic suspension high-speed axial flow fan comprises a cavity 1, wherein the upper side and the lower side of the cavity 1 are opened, stator driving controllers 2 are arranged on the upper side and the lower side of the interior of the cavity 1, and an impeller 3 is arranged between the two stator driving controllers 2;
the cavity 1 has two main flow channels, namely an upper main flow channel and a lower main flow channel, and only has two main flow channels which have almost the same flow velocity and flow direction and are symmetrical up and down. Therefore, the high-speed rotation of the impeller 3 generates two symmetrical gas flows up and down, and simultaneously generates axial gas suspension force which is symmetrical up and down but opposite in direction, so that the impeller 3 can generate axial gas suspension;
the stator driving controller 2 includes a stator 21 and three-phase windings 22 provided thereon;
the impeller 3 includes a plurality of blades 32 and a permanent magnet 31 surrounding the outside of the plurality of blades 32; the mechanical shape, the number, the deflection angle and other parameters of the blades 32 are optimized and simulated;
the permanent magnet 31 is a 4-pole fan-shaped permanent magnet rotor body;
the three-phase windings 22 form 6 magnetic poles, the three-phase windings 22 are connected in series and parallel, and the two three-phase windings 22 positioned on the upper side and the lower side are connected in parallel in a mirror image;
the annular cavity 1 of the invention consists of a semi-closed outer ring and an open inner ring, wherein the upper side and the lower side of the inner ring are open, and the upper inlet and the lower inlet and the outlet of the fan are also formed. The fan blades are located in the annular cavity 1. The outer circle side of the impeller 3 comprises an annular 4-pole fan-shaped permanent magnet rotor body of the motor, and the blades 32 of the impeller 3 are positioned on the inner circle side;
the sector iron cores of the upper stator 21 and the lower stator 21 and the 4-pole sector permanent magnet rotor body contained in the outer circle of the impeller 3 are uniformly distributed circumferentially, and the diameters of the uniformly distributed circumferences coincide. Thus, a double-stator single-rotor permanent magnet motor is formed. Meanwhile, radial passive magnetic suspension between the stator and the rotor is also formed. I.e. the ability to restore the concentricity, is maintained. By the special series-parallel connection method of the windings, 6 magnetic poles of the upper stator 21 and the permanent magnet rotor body form a radial active natural magnetic suspension function through series-parallel connection, and 6 magnetic poles of the lower stator 21 and the permanent magnet rotor body form a radial active natural magnetic suspension function through series-parallel connection. Namely, the upper stator 21 and the 6 magnetic poles of the stator 21 realize radial active natural magnetic suspension functions through parallel connection and serial connection respectively. And, two three-phase windings and midpoints of the upper stator 21 and the lower stator 21 are connected in parallel according to mirror images, so that the axial active natural magnetic suspension effect of the double-stator single rotor is formed. At the same time, the upper stator 21 and the lower stator 21 jointly drive the 4-pole permanent magnet rotor body contained in the cavity 1 to rotate. The structure has high space utilization and small axial dimension, and is favorable for forming a flat integral structure.
The windings of the upper moment motor and the lower moment motor of the natural magnetic suspension high-speed axial flow fan provided by the invention work in a mirror image parallel connection mode, the currents are the same, the tangential driving moment generated by the windings is the same, and the axial natural magnetic suspension forces are opposite. Therefore, the impeller 3 can naturally magnetically suspend at the rotation center of the natural magnetic suspension high-speed axial flow fan to form the natural magnetic suspension high-speed axial flow fan.
As shown in fig. 5, the impeller 3 further includes a plurality of magnetic suspension short blades 33 disposed on the upper and lower sides of the impeller 3, in order to promote the radial and axial suspension force of the present invention, the impeller 3 is disposed on the upper and lower end surfaces and the outer circumferential surface of the cavity 1, and 6 magnetic suspension short blades 33 with a height of 0.2 to 0.5mm are uniformly distributed, when the impeller 3 rotates at a high speed, the magnetic suspension short blades 33 also drive the gas to rotate at a high speed, the pressure generated by the high-speed gas is directed to the inner circumference of the cavity 1, and at the same time, the pressure generated by the high-speed gas is also directed to the upper and lower sides of the cavity 1. That is: when the impeller 3 rotates at a high speed, a small portion of the air flow enters the chamber 1 from the inner circumference of the chamber 1 and generates pressure directed toward the inner circumference of the chamber 1, and at the same time, toward the upper and lower sides of the chamber 1. Said pressure generates an effective radial gas levitation force, levitating the whole impeller 3. The present invention utilizes magnetic levitation stubs 33 to generate effective additional radial and axial gas levitation forces.
The stator 21 on the upper side wall and the stator 21 on the lower side wall of the stator driving controller 2 jointly drive the 4-pole sector permanent magnet rotor body in the impeller 3 to rotate, but the iron cores of the stators 21 on the upper side and the lower side have axial attractive force on the 4-pole sector permanent magnet rotor, the attractive force on the two sides is equal only when the 4-pole sector permanent magnet rotor is axially centered on the stators 21 on the two sides, and when any deviation exists between the air gaps on the upper side and the lower side, the 4-pole sector permanent magnet rotor is sucked to the side with small air gap, so that in a static state and an initial state, the 4-pole sector permanent magnet rotor is sucked to the side with small air gap randomly. The 4-pole sector permanent magnet rotor is axially unstable, and active axial magnetic suspension is required to axially suspend the 4-pole sector permanent magnet rotor. The three-phase windings formed by the upper stator 21 and the three-phase windings formed by the lower stator 21 are connected in parallel according to mirror images, the counter electromotive force of the three-phase windings on the side with small air gap is increased, the three-phase current is decreased, on the contrary, the counter electromotive force of the three-phase windings on the side with large air gap is decreased, the three-phase current is increased, the axial tension on the side with large air gap is increased, the axial tension on the side with 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; after the impeller 3 rotates, the invention has the axial natural magnetic suspension function;
a driving and controlling circuit is arranged in the stator driving controller 2; only three wires (such as power supply+, power ground and USB) are arranged outside, and the reliability is high. The flat magnetic suspension fan device can independently operate, can also be connected with an external system control system through a three-wire interface, and can read through a USB serial interface: parameters such as voltage, current, rotor rotation speed, pressure, flow and the like are used by the intelligent control system;
the control circuit can actively detect the rotating speed and the current of the motor in real time, and estimate the inlet and outlet flow of the fan through the rotating speed and the inlet and outlet pressure of the fan through the rotating speed and the current. And estimating the power change, moment change and vibration performance change of the fan and the motor through the instantaneous change of the rotating speed and the current. The high-efficiency and safe operation of the magnetic suspension fan device is ensured by actively detecting and timely adjusting the voltage, current, rotating speed and moment of the motor in real time.
The invention has simple and reliable mechanical structure and control circuit, but comprises: radial active natural magnetic levitation technology, axial active natural magnetic levitation technology, radial passive magnetic levitation technology, radial and axial gas levitation technology. These suspension techniques in combination ensure that the impeller 3 has a sufficiently strong natural suspension capacity;
the cavity 1 is made of engineering plastics or non-magnetic conductive metal materials or a combination of the engineering plastics and the non-magnetic conductive metal materials, and the embedded permanent magnet 31 for transmitting torque is sealed in the impeller 3, so that the permanent magnet sheet is prevented from being corroded by gas.
The engineering plastic material can be: one or more of modified polytetrafluoroethylene, polyimide and silicon-based high polymer materials; the material of the permanent magnet 31 may be: sintered NdFeB, bonded NdFeB materials or other high magnetic energy product permanent magnets do not need back iron, so that the weight of the rotating body is small;
the windings on the z=6 poles of the upper stator 21 form a radial active natural magnetic suspension function with the permanent magnet rotor body through serial-parallel connection, and the windings on the z=6 poles of the lower stator 21 form a radial active natural magnetic suspension function with the permanent magnet rotor body through serial-parallel connection. The specific series-parallel method is as described in fig. 3 and 4: two windings U1 and U2 which are 180 DEG symmetrical of the U phase are connected in parallel, and the tail end of the two windings is connected with the midpoint of the three-phase winding to form a parallel branch of the U phase winding; two windings V3 and V4 which are 180 DEG symmetrical to each other are connected in parallel, and the tail end of the windings is also connected with the midpoint of the three-phase winding to form a parallel branch of the V-phase winding; two windings W5 and W6 which are 180 DEG symmetrical in the W phase are connected in parallel, and the tail end of the windings W is also connected with the midpoint of the three-phase winding to form a parallel branch of the W phase winding; thus, U, V, W three-phase windings have 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 rotor is driven to do radial movement in the direction of restoring the air gap uniformity, and the natural electromagnetic magnetic suspension effect is achieved. Each phase of the three-phase winding is provided with a 180-degree symmetrical parallel branch, so that a special three-phase winding is formed, and the three-phase winding can actively, naturally and uniformly restore or stabilize the rotor to the central position from Z=6 uniformly distributed positions in the radial direction when the motor rotates. This is the "radial natural electromagnetic magnetic levitation" effect.
Since the upper and lower stators 21 use the same rotor, i.e., the impeller 3, the stator windings in the upper and lower stators 21 are mirror-image windings, as shown in fig. 3 and 4. U1 and U2 of the upper stator 21 are connected in parallel to form a U phase, V3 and V4 of the upper stator 21 are connected in parallel to form a V phase, and W4 and W5 of the upper stator core are connected in parallel to form a W phase; u1 and U2 of the lower stator 21 are connected in parallel to form a U phase, V3 and V4 of the lower stator 21 are connected in parallel to form a V phase, and W4 and W5 of the lower stator 21 are connected in parallel to form a W phase; the windings of the upper and lower mirrored stators 21 are then connected in parallel. The special double-stator three-phase winding is formed, and when the motor rotates, the double-stator three-phase winding can automatically adjust respective stator currents when the upper stator 21 is eccentric relative to the rotor, the air gap is small, the counter potential is large, the stator 21 current becomes small, the air gap is large, the counter potential is small, the stator 21 current becomes large, and the rotor is actively, naturally and uniformly restored or stabilized at the axial center position from the axial direction. The magnetic suspension type magnetic suspension device has the effect of axial natural electromagnetic magnetic suspension;
the stator 21 having z=6 poles has a pole arc of (0.9 to 0.75) τ d Z= (0.9-0.75) 360 DEG/6= (0.9-0.75) 60 DEG; the pole arc of the 2 P=4 pole rotor is (1.0-0.85) tau r 2 p= (1.0-0.85) 360 °/4= (1.0-0.85) 90 °. The pole arcs of the stators 21 result in gaps between adjacent stator 21 pole arcs, which gaps may be filled with insulating material to smooth and level the surface of the stator 21 pole arcs. So as to reduce the resistance of the fluid or gas in the compressor;
a second embodiment of the present invention will be described in detail below;
the permanent magnet 31 is a 10-pole fan-shaped permanent magnet rotor body, the three-phase windings 22 form 12 magnetic poles, the three-phase windings 22 are connected in series and parallel, and the two three-phase windings 22 positioned on the upper side and the lower side are connected in parallel in a mirror image.
The 12 magnetic poles and 10 permanent magnet rotor bodies of the upper and lower stators 21 are uniformly distributed circumferentially and have coincident diameters. The upper and lower stator iron cores are magnetic iron core poles, which are necessarily attracted by the permanent magnet rotor body, and the upper and lower stator iron cores are uniformly distributed in circumference and have coincident diameters, so that radial passive magnetic suspension which can be attracted mutually is formed, namely, the stator and the rotor have and keep concentric restoring capability. And the diameter DR of the magnetic pole of the permanent magnet rotor body is slightly larger than the diameter DS of the magnetic pole of the stator, so that the radial passive magnetic suspension is the radial stable passive magnetic suspension. Winding coefficient kw1 = 0.933 for this 2p = 10 pole Z = 12 pole slot motor;
as shown in fig. 6 to 8, a third embodiment of the present invention will be described in detail;
the natural magnetic suspension high-speed axial flow fans are connected in series in parallel, and the wind pressure and the flow are improved and the power capacity is improved through modularized serial connection. The adjustment of automatically changing wind pressure, flow and power is achieved by the independent adjustment of the rotational speed of each module. The effects of inhibiting vibration and noise can be achieved actively and automatically through combined speed change;
the invention can increase the power and reduce the volume and the cost by times by increasing the rotating speed. In the same way, the invention improves the rotating speed from 3000r/min to 60000r/min, namely 20 times, and can realize the remarkable aims of 20 times of power improvement, 20 times of volume reduction and 20 times of cost reduction.
Claims (10)
1. The utility model provides a high-speed axial fan of natural magnetic suspension, includes cavity (1), its characterized in that: the upper side and the lower side of the cavity (1) are opened, the upper side and the lower side of the cavity (1) are both provided with stator driving controllers (2), and an impeller (3) is arranged between the two stator driving controllers (2).
2. A natural magnetic levitation high-speed axial flow fan as defined in claim 1, wherein: the stator driving controller (2) includes a stator (21) and three-phase windings (22) provided thereon.
3. A natural magnetic levitation high-speed axial flow fan as defined in claim 2, wherein: the impeller (3) comprises a plurality of blades (32) and a permanent magnet (31) surrounding the outer sides of the plurality of blades (32).
4. A natural magnetic levitation high-speed axial flow fan according to claim 3, wherein: the permanent magnet (31) is a 4-pole fan-shaped permanent magnet rotor body.
5. The natural magnetic suspension high speed axial flow fan according to claim 4, wherein: the three-phase windings (22) form 6 magnetic poles, the three-phase windings (22) are connected in series and parallel, and the two three-phase windings (22) positioned on the upper side and the lower side are connected in parallel in a mirror image mode.
6. A natural magnetic levitation high-speed axial flow fan according to claim 3, wherein: the permanent magnet (31) is a 10-pole fan-shaped permanent magnet rotor body.
7. The natural magnetic suspension high speed axial flow fan according to claim 6, wherein: the three-phase windings (22) form 12 magnetic poles, the three-phase windings (22) are connected in series and parallel, and the two three-phase windings (22) positioned on the upper side and the lower side are connected in parallel in a mirror image mode.
8. A natural magnetic levitation high-speed axial flow fan as defined in claim 1, wherein: a driving and controlling circuit is arranged in the stator driving controller (2).
9. A natural magnetic levitation high-speed axial flow fan according to claim 3, wherein: the impeller (3) further comprises a plurality of magnetic suspension short blades (33) arranged on the upper side surface and the lower side surface of the impeller (3).
10. A natural magnetic levitation high-speed axial flow fan as defined in claim 1, wherein: the fans can be connected in series in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310256039.9A CN116123116A (en) | 2023-03-16 | 2023-03-16 | Natural magnetic suspension high-speed axial flow fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310256039.9A CN116123116A (en) | 2023-03-16 | 2023-03-16 | Natural magnetic suspension high-speed axial flow fan |
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| CN116123116A true CN116123116A (en) | 2023-05-16 |
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| CN202310256039.9A Pending CN116123116A (en) | 2023-03-16 | 2023-03-16 | Natural magnetic suspension high-speed axial flow fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633075A (en) * | 2023-06-05 | 2023-08-22 | 江苏海拓宾未来工业科技集团有限公司 | High-speed permanent magnet motor of air suspension centrifugal blower and working method thereof |
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2023
- 2023-03-16 CN CN202310256039.9A patent/CN116123116A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633075A (en) * | 2023-06-05 | 2023-08-22 | 江苏海拓宾未来工业科技集团有限公司 | High-speed permanent magnet motor of air suspension centrifugal blower and working method thereof |
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