CN115001316A

CN115001316A - Dynamic magnetic suspension device

Info

Publication number: CN115001316A
Application number: CN202210614421.8A
Authority: CN
Inventors: 吴建祥
Original assignee: Shenzhen Xuanfu Technology Co ltd
Current assignee: Shenzhen Xuanfu Technology Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-02

Abstract

The invention discloses a dynamic magnetic suspension device, which comprises a base and a suspension body, wherein the base and the suspension body have magnetic repulsion, first magnetic force resisting the dead weight of the suspension body is generated between the base and the suspension body, an attraction medium body is arranged in the base, and second magnetic force resisting the side turning of the suspension body is generated between the attraction medium body and the suspension body; a reference position resetting device is arranged in the base; the control circuit enables the reference position resetting device to generate third magnetic force for controlling the suspension body to be stably reset. The invention adopts brand new combination in the aspects of space structure and material selection, so that the whole dynamic magnetic suspension device has low cost, controllable rotating speed and rich dynamic sense, and brings brand new experience to the ornamental value of magnetic suspension products. Meanwhile, the technical problem that the traditional magnetic suspension product is difficult to place is solved, and conditions are created for the large-scale popularization and use of the magnetic suspension product.

Description

Dynamic magnetic suspension device

Technical Field

The invention relates to the technical field of magnetic suspension control, in particular to a dynamic magnetic suspension device.

Background

The magnetic suspension products in the current market mainly have two defects, one is that the suspension body is difficult to place, and the placement skill is difficult to grasp for a novice, so that the use experience of consumers is poor; secondly, the suspension body can only rotate ceaselessly, and the rotating speed is not adjustable, so that the ornamental experience is lacked, and the functional widening application is restricted.

The Chinese patent application (application number 200610065336.1) discloses a magnetic repulsion type suspension device, which adopts an annular ferrite magnet, and has a small head and a large foot, so that the appearance is not harmonious and the viewing experience is not good. The Chinese patent application (application number 201910603771.2) discloses a dynamic magnetic suspension device, which effectively solves the problem of inconsistent appearance, but does not solve the problem of uncontrollable rotation of a magnetic suspension product. The Chinese invention patent application (application number 201910933498.X) discloses a dynamic magnetic suspension device and a rotary lifting mechanism thereof, which adopt an automatic lifting mechanism, effectively solve the problem of difficult placement of suspended products, but cause rapid rise of cost due to too complex structure, double increase of product sale unit price, influence on appearance and difficulty in popularization and use.

In summary, there is a need for a dynamic magnetic levitation device with more reasonable structure and cost design, easy placement and easy rotation control.

Disclosure of Invention

The invention aims to solve the technical problems that the suspension body of the existing magnetic suspension product is difficult to place, the rotating speed is uncontrollable, the cost is high and the popularization is difficult.

In order to solve the technical problems, the technical scheme adopted by the invention is to provide a dynamic magnetic suspension device, which comprises a base and a suspension body, wherein the base and the suspension body have magnetic repulsion mutually, the base and the suspension body are oppositely arranged from bottom to top, first magnetic force resisting the self weight of the suspension body is mutually generated between the base and the suspension body,

an attractive medium body is arranged in the base, and the attractive medium body and the suspension body are mutually attracted to generate a second magnetic force resisting the side turning of the suspension body;

a reference position resetting device is arranged in the base;

and a control circuit connected with the reference position resetting device is also arranged in the base, and the control circuit enables the reference position resetting device to generate a third magnetic force for controlling the suspension body to stably reset.

In the above scheme, the base is internally provided with a first repulsive magnet, the suspension is internally provided with a second repulsive magnet, the first repulsive magnet and the second repulsive magnet have magnetic repulsion between each other, and the reference position resetting device is a plurality of electromagnets respectively arranged along the periphery of the inner axis of the base.

In the above solution, an X-axis coordinate line and a Y-axis coordinate line are arranged along the inner axial plane of the base, the control circuit detects the distance of the suspension body relative to the axial reference position along the X-axis and the Y-axis directions, respectively, and causes the reference position resetting device to generate a third magnetic force that pulls the suspension body to the axial reference position, the number of the reference position resetting devices is 4, and 2 reference position resetting devices are arranged along the X-axis and the Y-axis directions of the base, respectively, and are connected in series with the two reference position resetting devices on the X-axis or the Y-axis.

In the above solution, the base is provided with magnetic sensors for detecting distances of the suspension body with respect to a reference position of the axis corresponding to the X-axis and the Y-axis directions, the control circuit is connected to each of the magnetic sensors, the magnetic sensor on the X-axis is disposed corresponding to 2 reference position resetting devices on the X-axis, the magnetic sensor on the Y-axis is disposed corresponding to 2 reference position resetting devices on the Y-axis, and the magnetic sensors are detachably disposed in the base.

In the above scheme, the control circuit comprises sensor signal detection circuit, amplifier circuit and power amplifier circuit that connect gradually, sensor signal detection circuit, amplifier circuit, power amplifier circuit are parallelly connected with power supply circuit respectively, magnetic sensor is linear sensor, sensor signal detection circuit according to the distance value that magnetic sensor detected to amplifier circuit output corresponding voltage value, amplifier circuit carries out after the voltage signal amplification output to power amplifier circuit, and makes power amplifier circuit drive reference position resetting means produces corresponding third magnetic force.

In the above-mentioned solution, one or more dynamic electromagnetic control devices are built in the base, and a fourth magnetic force for controlling the suspension to generate motion is generated.

In the above scheme, the dynamic electromagnetic control device is connected to the control circuit, and the plurality of dynamic electromagnetic control devices are sequentially arranged around the central axis of the base.

In the above scheme, the base is internally provided with a fixed plate, and all the components in the base are respectively fixed or detachably arranged on the fixed plate.

In the above scheme, a lifting mechanism is arranged in the base, the lifting mechanism is respectively connected to the control circuit and the first repulsion magnet, and the lifting mechanism controls the first repulsion magnet to vertically lift.

In the above scheme, the first repulsive magnet is fixed at a position on the axis thereof, and the fixed position of the first repulsive magnet is higher than, lower than or flush with the upper surface of the electromagnet.

In the above scheme, the attraction medium body is a non-magnetic electrolytic iron, a permanent magnet or a material capable of attracting the suspension, the attraction medium body is in an annular shape or a plurality of cylinders and square columns arranged in a similar annular shape, or the attraction medium body is a matched annular iron ring and a circular iron column, the upper surface of the attraction medium body is a plane, an inclined plane, an arc surface or a wavy surface, and the attraction medium body is fixed in the base or is independently fixed on a plastic support.

In the above scheme, the first repulsive magnet is a permanent magnet or an energized electromagnet, the second repulsive magnet is a permanent magnet, and the electromagnet is a structure in which an iron core is arranged in the middle and a coil is wound outside or a coil without an iron core.

The invention adopts brand-new arrangement and combination in space, and selects the attraction medium body at the same time, so that the whole dynamic magnetic suspension device is more reasonable and compact, the suspension rotating speed is controllable, and the control is more stable.

Drawings

FIG. 1 is a schematic side view of the magnetic force distribution of the present invention;

FIG. 2 is a top view of the inside of the base of the present invention;

FIG. 3 is a perspective view of the inside of the base of the present invention;

FIG. 4 is a flow chart of the circuit control according to the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings.

The invention discloses a dynamic magnetic suspension device, which can be realized by appropriately improving process parameters by a person skilled in the art according to the content of the dynamic magnetic suspension device. It is expressly intended that all such alterations and modifications which are obvious to those skilled in the art are deemed to be incorporated herein by reference, and that the techniques of the invention may be practiced and applied by those skilled in the art without departing from the spirit, scope and range of equivalents of the invention.

In the present invention, unless otherwise defined, scientific and technical terms used herein have the meanings that are commonly understood by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be noted that the terms "first" and "second" in the description of the present invention are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Generally, to suspend the product smoothly in the air, 3 conditions must be met: the suspension base provides repulsive force to counteract the gravity of the product to be suspended, so that the suspension body floats. 2, in order to raise the suspension height as much as possible and enhance the ornamental value, the magnet is usually placed under the product to be suspended, so that the center of gravity of the product is higher than that of the magnet, the product is easy to turn on one's side, and the suspension base must provide the force for resisting the turning on one's side. 3, the gravity center of the product is required to be on the center line of the repulsion force of the suspension base, otherwise, the product can shift and fall to be adsorbed on the base.

As shown in fig. 1 to 4, the dynamic magnetic suspension apparatus provided by the present invention includes a base 1 and a suspension 2 having magnetic repulsion therebetween, the base 1 and the suspension 2 are oppositely disposed from bottom to top, preferably, a first repulsive magnet 11 is disposed along a central axis of the base 1, a second repulsive magnet 21 is disposed along a central axis of the suspension 2, an upper surface of the first repulsive magnet 11 and a lower surface of the second repulsive magnet 21 have the same magnetic repulsion and generate a first magnetic force F1 resisting the self weight of the suspension 2, the first magnetic force F1 allows the suspension 2 to float at a predetermined reference position above the base 1, and the first repulsive magnet 11 and the second repulsive magnet 21 generally have opposite magnetic polarities on their respective upper and lower surfaces.

The attraction medium body 12 is arranged along the base 1, the central axis of the attraction medium body 12 is generally overlapped with the central axis of the base 1, the attraction medium body 12 and the second repulsion magnet 21 attract each other to generate a second magnetic force F2 resisting the side turning of the suspension body 2, and the second magnetic force F2 can effectively prevent the suspension body 2 from turning in a vertical plane and keep the axis of the suspension body 2 vertical.

An ideal state position when the base 1 and the suspension body 2 are stably suspended can be set as a reference position, a reference position resetting device is arranged in the base 1, preferably, the reference position resetting device is a plurality of electromagnets 13 respectively arranged along the periphery of the inner axis of the base 1, and a control circuit connected with the electromagnets 13 is further arranged in the base 1; specifically, preferably, an X-axis coordinate line and a Y-axis coordinate line are set along an inner axial plane of the

base

1, 2 electromagnets 13 are respectively arranged in the base 1 along the X-axis and the Y-axis, and are generally symmetrically arranged along the Y-axis and the X-axis, two electromagnets 13 on the X-axis or the Y-axis are connected in series and are respectively located at two sides of the axial center, the distances of the second repulsive magnet 21 along the X-axis and the Y-axis directions relative to the axial center reference position are respectively detected by the control circuit, and a third magnetic force F3 with opposite magnetism is generated, and the control circuit enables the electromagnets 13 to generate a third magnetic force F3 for stably resetting the suspension 2 towards the axial center reference position.

The magnetic sensors 14 for detecting the reference distance of the second repulsive magnet 21 relative to the axis are respectively arranged in the base 1 corresponding to the X-axis direction and the Y-axis direction, the control circuit is respectively connected with each magnetic sensor 14, the magnetic sensor 14 on the X-axis is arranged corresponding to 2 electromagnets 13 on the X-axis, the magnetic sensor 14 on the Y-axis is arranged corresponding to 2 electromagnets 13 on the Y-axis, the magnetic sensor 14 is preferably in a plug-in type, and the magnetic sensor 14 is detachably arranged on the fixing plate 15 in a plug-in manner.

The electromagnet 13 functions in such a way that when a control circuit gives it a control current, the two electromagnets 13 on the X-axis or the Y-axis will have opposite polarities at their upper ends, thus generating a resultant force on the levitation body 2, thereby controlling the movement of the levitation body 2 in the direction X, Y.

Thus, the suspension body 2 stably suspends a certain preset position above the base 1 under the action of the three forces F1, F2 and F3.

The circuit control of the invention is as follows: the control circuit is composed of a sensor signal detection circuit 16, an amplifying circuit 17 and a power amplifier circuit 18 which are connected in sequence, the sensor signal detection circuit 16, the amplifying circuit 17 and the power amplifier circuit 18 are respectively connected with a power circuit 19 in parallel, the magnetic sensor 14 is a linear sensor, the sensor signal detection circuit 16 outputs a corresponding voltage value to the amplifying circuit 17 according to a distance value detected by the magnetic sensor 14, the amplifying circuit 17 amplifies the voltage signal and then outputs the amplified voltage signal to the power amplifier circuit 18, and the power amplifier circuit 18 drives the electromagnet 13 to generate a corresponding third magnetic force F3.

In the invention, the specific principle that the control circuit ensures that the gravity and the repulsion are on the same straight line is as follows: supposing that the suspension body deviates delta X along the positive direction of the X axis, because the movement of the suspension body inevitably causes the change of a magnetic field, then a magnetic sensor arranged in the middle of the X axis can sense the deviation delta X, further the deviation delta X is converted into a voltage V with a corresponding magnitude and output to a control circuit, the control circuit receives the weak voltage signal and amplifies the weak voltage signal, then a power amplification circuit is driven, the power amplification circuit provides strong current to drive 2 electromagnets in the X direction, and the 2 electromagnets generate magnetic force to pull the suspension body back to a central position (delta X → 0); similarly, the levitation body is stably controlled on the axis position of the base by the control circuit, when the levitation body is stably levitated in the center, the control circuit does not work much, and the power consumption is low.

The base 1 is preferably provided with a fixing plate 15 inside, the first repulsive magnet 11, the attractive force medium body 12, the electromagnet 13, the magnetic sensor 14, the dynamic electromagnet 131 and the control circuit are respectively fixed or detachably arranged on the fixing plate 15 as required, generally, the fixing plate 15 is a main board, the control circuit can be separated from the fixing plate 15, a control circuit main board is additionally arranged, and the first repulsive magnet 11, the attractive force medium body 12, the electromagnet 13, the magnetic sensor 14 and the dynamic electromagnet 131 can be fixed on the plastic bracket alone or in combination.

The first repulsion magnet is a permanent magnet or an electrified electromagnet, and the second repulsion magnet is a permanent magnet generally, preferably a cylinder, and can also be other bodies such as a square cylinder and the like. The suspension body is a sphere, a cube or an irregular shape. The attraction medium body is usually annular, can also adopt other shapes similar to the annular shape, can also adopt a plurality of round iron columns, square iron columns and the like which are arranged into the similar annular shape, and even can be matched with the round iron columns for use simultaneously by an annular iron ring to achieve a certain specific function. The upper surface of the attraction medium body can be a plane, an inclined plane, a cambered surface or a wavy surface and the like according to the appearance requirement. The attraction medium body 12 is a non-magnetic electrolytic iron or a permanent magnet or a material capable of attracting the second repulsive magnet, the attraction medium body can be fixed on a fixed plate in the base or independently fixed on a plastic support, and the electromagnet 13 is of a structure with an iron core in the middle and a coil wound outside or a coil without the iron core.

The magnetic sensors 14 of magnetic suspension products in the market are all installed at the center of the base 1, and they are fixed on the main board 15 through 2 small PCB board crosses, for example, the invention patent application in china (application No. 201910603771.2), it can be seen that the structure complexity and cost are not low, the cross board needs to be welded on the main board 15, skilled workers are necessary to perform, but the products often have many defects. For this reason, it is known that the magnetic sensor 14 must be placed at the center of the base to pull the suspension body 2 back to the center with the electromagnet 13 at the center 2 under balanced force.

The invention breaks the conventional design, and the magnetic sensor 14 can be placed at any position within the range of the central connecting line of the 4 electromagnets 13. The first repulsive magnet 11 can be arranged in the middle of the magnetic field generating device, and the magnetic field generating device has the advantages that the attractive medium body 12 (which is made of iron and not made of strong magnetic magnet materials) can be introduced to be used smoothly, and the cost is greatly reduced.

If the cross plate is continuously used on the basis of the Chinese utility model patent (application number: 201921051782.6), the magnetic force of the repulsion magnet 11 below the main plate is strengthened, and the design of the attraction medium body 12 of the invention is also adopted, not only the cost of the magnetic force product is strengthened and is rapidly increased, but also the magnetic force is not strong. Because, firstly, the control circuit can not be turned on, the control circuit of the magnetic suspension product is turned on by detecting that the suspension body 2 is close to the base 1, and the magnetic force of the second repulsive magnet 21 on the upper surface of the base is enhanced. The polarity of the lower surface of the second repulsive magnet 21 in the suspension 2 is the same as that of the upper surface of the first repulsive magnet 11 in the base 1, and the magnetic forces cancel each other at the upper surface of the base and cannot trigger the control circuit. According to the invention, the first repulsive magnet 11 is placed on the main board, the magnetic force on the upper surface of the base is enhanced, but the distance between the first repulsive magnet 11 and the second repulsive magnet 21 is closer, so that the diameter of the first repulsive magnet 11 can be greatly reduced, the magnetic force distribution range of the first repulsive magnet 11 on the upper surface of the base is greatly reduced, and the trigger circuit sensor can easily avoid the influence of the first repulsive magnet 11 on the trigger circuit sensor. Second, the magnitude of the magnetic force of the magnets is inversely proportional to the cube of the distance, that is, the magnetic force between the magnets (including the magnets and the iron) decreases sharply with increasing distance. When the suspension body 2 approaches the base 1, the second repulsive magnet 21 is in close proximity to the attractive medium body 12 (iron) and the electromagnet (iron core is iron material), and the attractive force therebetween is very large. When the first repulsive magnet 11 is placed under the main board, the distance is long, and the repulsive force between the first repulsive magnet 11 and the second repulsive magnet 21 is difficult to overcome the attractive force between the second repulsive magnet 21 and the attractive force medium body 12 and the electromagnet 13, so that the suspension body 2 cannot float. (for example, the attracting medium body 12 is a magnet instead of iron, and although its upper surface is attracted to the second repulsive magnet 21, the resultant force at the center of the attracting medium body 12 is repulsive to the second repulsive magnet 21, which is utilized in the invention patent application No. 200610065336.1).

In summary, the key point of the present invention is to break the conventional design, change the way of fixing the magnetic sensor by the cross plate in the middle of the base 1, and change the plug-in type magnetic sensor 14 to vacate the central space for the first repulsive magnet 11. The advantages of such a design are: 1, the attraction medium body 1 is made of iron instead of conventional magnetic material, so that the cost is greatly reduced. 2, the plate manufacturing cost and the patch manufacturing cost of the cross plate are saved. 3, the magnetic sensor 14, which is a plug-in, is not only much easier to weld, but also hardly suffers from a welding problem. 4, because the first repulsive magnet 11 moves downwards from the main board to the main board, the distance from the suspension body 2 is closer, a magnet with large magnetic force is not needed, and the cost is further reduced.

The invention also effectively solves the problem that the magnetic suspension product is difficult to release by a novice, and the problem of the magnetic suspension product is exactly how to quickly align the axis of the second repulsive magnet 21 with the axis of the first repulsive magnet 11. In general terms, the problem of aligning the center of the suspension body 2 with the center of the base 1. It is difficult for the human eye to center the 2 persons, and there are many deviations. The electromagnet 13 can correct this deviation and pull the suspension 2 into central alignment. But an electromagnet is in fact an energized coil, which generates a magnetic force that can act on the magnet, with a large force when the electromagnet is close to the magnet and little force when it is far away. That is, the closer the electromagnet 13 needs to pull the suspension 2 to the center of the base 1, the better the 2 are. The distance between the two magnets 2 is determined by the first repulsive magnet 11 and the second repulsive magnet 21, and the distance between them also determines the height of the floating body 2. That is, the higher the suspension 2 floats, the smaller the pulling force of the electromagnet 13 is, and the harder it is to release. But too low of a float loses the aesthetic value.

The present invention introduces a lifting mechanism 111, namely: the base 1 is internally provided with a lifting mechanism 111, the lifting mechanism 111 is respectively connected to the control circuit and the first repulsive magnet 11, the lifting mechanism 111 controls the first repulsive magnet 11 to vertically lift, preferably, the first repulsive magnet 11 is fixed at a certain position of the axis thereof, and the fixed position of the first repulsive magnet 11 is higher than, lower than or flush with the upper surface of the electromagnet 13.

Before the suspension body 2 is placed, the lifting mechanism 111 controls the first repulsive magnet 11 to be in a low position, and the suspension body 2 is relatively low in floating and relatively close to the electromagnet 13, so that a consumer can easily place the suspension body 2 on the base 1 in a floating manner. When the consumer places the suspension body 2 on the base 1, the control circuit sends a feedback signal to the lifting mechanism 111 after detecting that the suspension body 2 is placed. After the lifting mechanism 111 receives the feedback signal, the driving stepping motor drives the first repulsive magnet 11 to move upwards, so that the suspension body 2 floats to a reasonable height, and the problem that the magnetic suspension product is difficult to place is effectively solved.

By applying the principle, other specific actions can also be realized, for example, the suspension body 2 jumps up and down in the air along with music, a music signal can be converted into a voltage or current signal to be transmitted to the stepping motor, and the stepping motor drives the first repulsive magnet 11 to make the suspension body 2 jump up and down in the air.

It is known that a faster rotation speed indicates a higher centrifugal force of the levitation body 2, which means a higher probability of being off-centre, and that the electromagnet 13 is intended to pull the levitation body 2 towards the centre. The load on the electromagnet 13 increases as the rotation speed increases. I.e. the current passed by the electromagnet 13 is large for a long time. The larger the heat generated by the electromagnet 13 is, the higher the base temperature is, the worse the stability of the electronic components is, and the worse the stability of the whole magnetic suspension system is, so that the rotating speed is too high, which is the gram of the magnetic suspension product, and the rotating speed is very necessary to be controlled.

The present invention solves the problems of monotonous rotation and uncontrollable rotation speed of the suspension body, and the magnetic suspension product is characterized in that the suspension body floats in the air and automatically rotates. The speed of the magnetic suspension products on the market is random, and some magnetic suspension products are slow and uncontrollable. The invention can control the rotating speed by the dynamic electromagnet. The concrete structure is as follows: one or more dynamic electromagnetic control devices are arranged in the base 1, preferably, the dynamic electromagnetic control devices are dynamic electromagnets 131, the dynamic electromagnets 131 are connected with a control circuit and generate a fourth magnetic force F4 for controlling the rotation of the second repulsive magnet 21, the dynamic electromagnets 131 are iron cores in the middle, a coil structure or a coil without iron cores is wound outside, the dynamic electromagnets 131 are usually arranged on the fixing plate 15, and the dynamic electromagnets can be sequentially arranged around the central axis of the base 1.

In the invention, the number of times of 1 minute change can be detected in view of the fact that the periodic change of the magnetic field and the current is brought by the suspension body 2 per revolution, when the number of times exceeds a reasonable range, the detection sensor gives a signal to the control circuit, the control circuit gives a corresponding current to the dynamic electromagnet 131, the dynamic electromagnet generates the fourth magnetic force F4 to pull the suspension body 2, and the rotating speed of the suspension body 2 is quickly reduced. When the rotating speed is lower than a reasonable value, the detection sensor gives a signal to the control circuit again, and the control circuit stops transmitting the current to the dynamic electromagnet 131. The rotational speed of the suspension 2 is thus controlled within a reasonable range. Similarly, when the rotation speed of the suspension body 2 is very low, the rotation speed can be increased to a reasonable range. The number of the dynamic electromagnets 131 can be 1, or several dynamic electromagnets can be arranged around the circumference to cooperate with each other.

The rotating speed of the suspension body 2 can be controlled, so that the ornamental value of the magnetic suspension product is improved, and the possibility of widening the application range of the magnetic suspension product is provided. Such as an implanted monitoring camera. By adjusting the rotating speed, the condition of the home around the magnetic suspension product can be seen clearly. The camera is enabled to face a specific position (such as a door) through the coordination of a plurality of dynamic electromagnets. If the intelligent sound box is a suspension intelligent sound box, the magnetic suspension sound box can generate actions similar to nodding by giving an instantaneous current to the dynamic electromagnet. Therefore, the magnetic suspension product can enter the Internet of things and the smart home.

The present invention is not limited to the above preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention.

Claims

1. A dynamic magnetic suspension device comprises a base and a suspension body which have magnetic repulsion, the base and the suspension body are oppositely arranged from bottom to top, a first magnetic force resisting the self weight of the suspension body is mutually generated between the base and the suspension body, the dynamic magnetic suspension device is characterized in that,

a reference position resetting device is arranged in the base;

2. A dynamic magnetic levitation apparatus as recited in claim 1, wherein a first repulsive magnet is disposed in the base, a second repulsive magnet is disposed in the suspension, the first repulsive magnet and the second repulsive magnet have magnetic repulsion with each other, and the reference position resetting means is a plurality of electromagnets disposed around the inner axis of the base, respectively.

3. The dynamic magnetic levitation device of claim 1, wherein X-axis and Y-axis coordinate lines are provided along an inner axial plane of the base, the control circuit detects distances of the levitation body along X-axis and Y-axis directions with respect to an axial reference position, respectively, and causes the reference position resetting device to generate a third magnetic force that pulls the levitation body toward the axial reference position, the number of the reference position resetting devices is 4, and 2 reference position resetting devices are arranged along X-axis and Y-axis directions of the base, respectively, and are connected in series with two reference position resetting devices on the X-axis or the Y-axis.

4. The dynamic magnetic levitation device of claim 3, wherein magnetic sensors for detecting the distance between the levitation body and a reference position of the axle center are respectively disposed in the base corresponding to the directions of the X-axis and the Y-axis, the control circuit is respectively connected to each of the magnetic sensors, the magnetic sensor on the X-axis is disposed corresponding to 2 reference position resetting devices on the X-axis, the magnetic sensor on the Y-axis is disposed corresponding to 2 reference position resetting devices on the Y-axis, and the magnetic sensors are detachably disposed in the base.

5. The dynamic magnetic levitation device of claim 4, wherein the control circuit comprises a sensor signal detection circuit, an amplification circuit and a power amplification circuit which are connected in sequence, the sensor signal detection circuit, the amplification circuit and the power amplification circuit are respectively connected in parallel with the power circuit, the magnetic sensor is a linear sensor, the sensor signal detection circuit outputs a corresponding voltage value to the amplification circuit according to the distance value detected by the magnetic sensor, the amplification circuit amplifies the voltage signal and outputs the amplified voltage signal to the power amplification circuit, and the power amplification circuit drives the reference position resetting device to generate a corresponding third magnetic force.

6. The dynamic magnetic levitation apparatus of claim 1, wherein one or more dynamic electromagnetic control devices are built into the base and generate a fourth magnetic force that controls the motion of the levitation body.

7. The dynamic magnetic levitation device according to claim 6, wherein the dynamic electromagnetic control device is connected to the control circuit, and a plurality of the dynamic electromagnetic control devices are sequentially arranged around the central axis of the base.

8. The dynamic magnetic levitation device according to any one of claims 1 to 7, wherein a fixed plate is disposed in the base, and each component in the base is respectively fixed or detachably disposed on the fixed plate.

9. The dynamic magnetic levitation device as recited in claim 2, wherein a lifting mechanism is disposed in the base, the lifting mechanism is connected to the control circuit and the first repulsive magnet, and the lifting mechanism controls the first repulsive magnet to lift vertically.

10. The dynamic magnetic levitation device of claim 9, wherein the first repulsive magnet is fixed at a position on its axis, and the fixed position of the first repulsive magnet is higher, lower or flush with the upper surface of the electromagnet.

11. The dynamic magnetic suspension device according to claim 1, wherein the attraction medium body is a non-magnetic electrolytic iron, a permanent magnet or a material capable of attracting the suspension body, the attraction medium body is in a ring shape or a plurality of cylinders and square columns arranged in a similar ring shape, or the attraction medium body is a matched ring-shaped iron ring and a round iron column, the upper surface of the attraction medium body is a plane, an inclined plane, an arc surface or a wave surface, and the attraction medium body is fixed in the base or is independently fixed on a plastic support.

12. The dynamic magnetic levitation device of claim 2, wherein the first repulsive magnet is a permanent magnet or an energized electromagnet, the second repulsive magnet is a permanent magnet, and the electromagnet is a structure with an iron core in the middle, a coil wound outside or a coil without an iron core.