Floating height control device for levitating body

Abstract

To provide a control device capable of controlling a floating height of a floating body floated by magnetic repulsive force.SOLUTION: A floating height control device has a floating body 20 floating by magnetic repulsive force, and a floating control part 11 for controlling the floating body to lift up and down. The floating control part has an inner coil 11b and an outer coil 11a concentrically arranged outside. A lower side of the floating control part has floating means by a magnet 13a. The floating body attaches a permanent magnet on an upper surface and a lower surface of a disk-shaped soft magnetic member 21.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a device for levitating an object in the air by using magnetic repulsion, and more particularly to a device capable of controlling the levitation height. [Background technology]

[0002] By attaching a magnet to the levitation body and applying a magnetic force of the same polarity from below upward, utilizing the principle that magnetic forces of the same polarity act as a mutual repelling force, the levitation body can be made to levitate in the air. The present applicant has previously proposed a bell device in which the bell body floats in the air (Patent Document 1). The levitating bell device disclosed in Patent Document 1 can levitate to a predetermined height by balancing the magnetic repulsive force and the weight of the bell body, but it cannot control the height in the vertical direction. Therefore, the present invention provides an improvement that allows the floating height of the floating body in the air to be freely controlled. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-120810 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a control device capable of controlling the levitation height of a levitating body levitated by the repulsive force of magnetic forces. [Means for solving the problem]

[0005] The levitation height control device for a levitation body according to the present invention is characterized by comprising a levitation body that levitates by the repulsive force of magnetic forces, and a levitation control section for controlling the raising or lowering of the levitation body. Examples of the levitation control unit include one having an inner coil and an outer coil arranged concentrically around the inner coil, and one having three or more coils arranged concentrically. The levitation body in the present invention can be any product having a permanent magnet, such as a neodymium magnet, fixed thereto. For example, bells, dolls, lamps, toys, etc.

[0006] In the present invention, the strength and direction of the magnetic force generated by the levitation control unit is controlled, and in order to preliminarily apply a magnetic repulsive force to the levitation body, it is preferable to have a magnetic levitation means below the levitation control unit, and in this case it is even more preferable to have a horizontal position control means consisting of a plurality of coils below the levitation control unit. Effect of the Invention

[0007] The levitation height control device for a levitator according to the present invention can easily adjust the magnetic force by controlling the value of the current passed through the coil, and therefore can have a compact structure. Also, various levitating bodies can be raised into the air and lowered to a state where they are placed on the base portion. For example, if you ring a bell or a bell while it is suspended in the air, the sound will be easier to ring and the resonance will be longer. In addition, in the case of dolls or toys, you can enjoy the movement of them floating in the air by making them rise and fall. [Brief description of the drawings]

[0008] [Figure 1] 1 shows an example of the structure of a floating height control device for a floating body according to the present invention. [Diagram 2] FIG. 2 is a perspective view showing a state in which the levitation control unit is detached from the substrate. [Diagram 3] A perspective view seen from the levitation control unit is shown. [Figure 4] 1 shows a cross-sectional view of a flying height control device. [Diagram 5] 1A shows an example of lowering the levitation body, and FIG. 1B shows an example of raising the levitation body. [Figure 6] An example of magnet and coil arrangement is shown. [Figure 7] The specifications of the outer and inner coils are shown. [Figure 8] The electrical circuit diagram of the control unit is shown. [Figure 9] This shows the change in height of the levitation body due to an increase or decrease in the current. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An example of the structure of a floating height control device for a floating body according to the present invention will now be described with reference to the drawings.

[0010] FIG. 1 shows an external view, FIG. 2 shows an exploded view, FIG. 3 shows a perspective view, and FIG. 4 shows a cross-sectional view of the state shown in FIG. The example shown in FIG. 1 is a prototype produced to verify height control of the levitation body 20 using an experimental machine. The levitation body 20 had permanent magnets attached to the upper and lower surfaces of a disk-shaped soft magnetic member 21 having a diameter of 50 mm and a thickness of 2 mm. The north pole 22 is disk-shaped with a diameter of 48 mm and a thickness of 5 mm, and the south pole 23 is disk-shaped with a diameter of 30 mm and a thickness of 5 mm. The mass of the levitating body can be adjusted by adding a weight of 130g.

[0011] The levitation height control device according to the present invention has a levitation control unit 11 and four magnets (neodymium magnets) 13a to 13d mounted on a substrate 12, which are disposed below the levitation control unit 11 as shown in FIG. Alternatively, eight magnets may be used. Furthermore, on the substrate 12, four coils 14a to 14d made of iron core coils are concentrically arranged inside a plurality of magnets arranged concentrically. Here, the magnets 13a to 13d have north poles on their upper surfaces, generating a repulsive force with the north pole 22 of the levitation body. Each of the four coils 14a to 14d is an iron core coil, and the magnetic force of each is controlled so that the upper surface side becomes the S pole, corresponding to the S pole 23 of the levitation body 20. By adjusting the magnetic force of each coil, the horizontal position of the levitation body 20 is controlled. The specifications used in the experiment are as follows: Magnets 13a to 13d: diameter 14 mm, thickness 3.5 mm Coil 14a~14d: Iron core diameter 6mm, outer diameter 20mm, inner diameter 8mm, copper wire diameter 0.5mm

[0012] The disk-shaped levitation control unit 11 as a whole consists of a donut-shaped outer coil 11a and an inner coil 11b arranged inside it, with soft magnetic material 11c made of steel arranged in correspondence with the positions of the lower magnets 13a to 13d via insulating material 11d, allowing the magnetic force of the lower magnets 13a to 13d to be transmitted to the levitation body. The specifications are shown in the table in Figure 7. In the table, "Outer coil" corresponds to the outer coil 11a, and "Inner coil" corresponds to the inner coil 11b. FIG. 8 shows an electric circuit diagram for supplying electricity to the levitation control unit 11. Using this electrical circuit diagram, start-up currents were applied to the outer coil 11a and the inner coil 11b in opposite directions.

[0013] By increasing or decreasing the current, the height of the levitation body 20 rose and fell as shown in the schematic diagrams of FIGS. 5(a) and 5(b). The relationship between the current value at that time and the floating height (gap dimension) between the lower surface of the levitation body and the upper surface of levitation control unit 11 is shown in the graph of FIG. From the experimental results, it is understood that by controlling the amount of current supplied to the levitation control unit 11, it is possible to control the raising or lowering of the levitation body.

[0014] The above embodiment is an example of the levitation control unit 11 that is composed of an outer coil and an inner coil. The number of magnets 13 may be eight, and in that case, the positional relationship with the four coils 14 is shown in FIG. As another example of a combination of outer coil 11a and inner coil 11b shown in FIG. 1, iron core coils 31 to 34 may be arranged as shown in FIG. In this way, by arranging the four coils 14 and the four or eight magnets 13 with a slight shift around the center, a good balance between the levitation force and horizontal position control is achieved. FIG. 6 shows angles rotated counterclockwise relative to the horizontal direction of 0°. In this way, by controlling the current values ​​of the iron-core coils 31 to 34 one after another, it is possible to integrally control the magnetic force that controls the levitation height of the levitation body and the magnetic force that controls the horizontal position. [Explanation of symbols]

[0015] 11 Levitation control unit 11a Outer coil 11b Inner coil 11c Soft magnetic material 11d Insulator 12 Substrate 13a Magnet 14a Coil 20 Floating Body 21 Soft magnetic materials 22 N pole 23 S pole

Claims

[Claim 1] The present invention comprises a levitation body that levitates by the repulsive force of magnetic forces, a levitation control unit for controlling the upward or downward movement of the levitation body, and a position control means below the levitation control unit, The levitation control unit has an inner coil and an outer coil arranged concentrically around the inner coil, A levitation height control device for a levitation body, characterized in that the position control means has a plurality of coils arranged concentrically for controlling the horizontal position, and a plurality of magnets arranged concentrically outside the plurality of coils.

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