WO1995020264A1 - Dispositif de sustentation magnetique - Google Patents
Dispositif de sustentation magnetique Download PDFInfo
- Publication number
- WO1995020264A1 WO1995020264A1 PCT/JP1995/000075 JP9500075W WO9520264A1 WO 1995020264 A1 WO1995020264 A1 WO 1995020264A1 JP 9500075 W JP9500075 W JP 9500075W WO 9520264 A1 WO9520264 A1 WO 9520264A1
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- WIPO (PCT)
- Prior art keywords
- magnetic
- superconductor
- shaped
- ferromagnetic material
- levitation device
- Prior art date
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 328
- 238000005339 levitation Methods 0.000 title claims abstract description 150
- 230000004907 flux Effects 0.000 claims abstract description 100
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 23
- 239000002887 superconductor Substances 0.000 claims description 203
- 239000003302 ferromagnetic material Substances 0.000 claims description 143
- 238000001816 cooling Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 6
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- 230000007423 decrease Effects 0.000 abstract description 14
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
- F16C32/0438—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part with a superconducting body, e.g. a body made of high temperature superconducting material such as YBaCuO
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
- H02N15/04—Repulsion by the Meissner effect
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/825—Apparatus per se, device per se, or process of making or operating same
- Y10S505/876—Electrical generator or motor structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/825—Apparatus per se, device per se, or process of making or operating same
- Y10S505/876—Electrical generator or motor structure
- Y10S505/877—Rotary dynamoelectric type
Definitions
- the present invention relates to a magnetic levitation device using a superconductor.
- an attractive or repulsive magnetic levitation device using an electromagnet, a permanent magnet, or a ferromagnetic material has been used to levitate a movable portion to a fixed portion in a non-contact manner.
- the combination of a high-temperature superconductor and a permanent magnet has a relative position between the permanent magnet and the high-temperature superconductor, which is generated when part of the magnetic flux generated by the permanent magnet is trapped in the high-temperature superconductor.
- the movable part floats stably with a predetermined gap from the fixed part, and the magnetic field from the permanent magnet applied to the high-temperature superconductor. Can be stably maintained in the direction of the size of the gap and in the vertical direction so that the gap does not change.
- the force due to the pinning effect is several steps stronger than the force due to the Meissner effect described above, so that the floating rigidity can be increased.
- the conventional levitation mechanism using the pinning effect like the levitation mechanism using the Meissner effect described above, requires a permanent magnet to obtain the levitation force, and this raises the cost of the levitation device. was there.
- a high-temperature superconductor is placed in a movable part, it will be difficult to cool and keep the high-temperature superconducting break.
- a high-temperature superconductor may be placed in the fixed part and a permanent magnet may be placed in the movable part. In this case, there is a problem that the mechanical strength of the permanent magnet is lower than other structural members, and the strength of the entire movable part is reduced.
- the present invention provides a magnetic levitation device that can provide a stable and strong levitation / holding force, is inexpensive, has high mechanical strength, and has a high degree of freedom in device design, in order to solve such problems. Aim.
- the superconductor is cooled in a magnetic field in one direction, and the binning magnetic flux penetrates from one surface of the superconductor to the other surface, so that the ferromagnetic material is disposed on one surface of the superconductor.
- the pinned magnetic flux penetrating through the ferromagnetic material through the air gap largely bypasses the space and makes a round to the opposite surface of the superconductor, thus forming a so-called open magnetic circuit.
- a ferromagnetic material can be placed on the fixed or movable part, facing the high-temperature superconductor, so that the permanent magnet that is normally placed can be omitted.
- a ferromagnetic member that is inexpensive and easy to add, such as iron can be made compatible with a high-temperature superconductor, it is possible to reduce the cost of the levitation device and improve the mechanical strength.
- the ferromagnetic material can be disposed on the fixed or movable part opposite to the high-temperature superconductor, and the permanent magnet normally disposed can be omitted.
- a steel member that is inexpensive, has high strength, and is easily processed, such as iron or gay steel is used as a counterpart of the superconductor, the cost of the levitation device can be reduced and the mechanical strength can be improved.
- the magnetic resistance of the magnetic circuit can be kept low, the pinning magnetic flux can be used effectively, and the levitation force and the restoring force can be improved.
- FIG. 1 is a cross-sectional view of a magnetic levitation device showing a first embodiment of the present invention
- FIG. 2 is a cross-sectional view showing a structure in which a superconductor of the present invention is cooled in a magnetic field by a permanent magnet
- FIG. 4 (a) to 4 (d) are cross-sectional views showing a structure in which a superconductor is cooled in a magnetic field by an electromagnet
- FIGS. 4 (a) to 4 (d) are schematic explanatory views of the operation of the first embodiment of the present invention
- FIG. FIG. 6 is a characteristic diagram showing the relationship between the gap length and the magnetic attraction force when the magnetic levitation device of the first embodiment is used.
- FIG. 1 is a cross-sectional view of a magnetic levitation device showing a first embodiment of the present invention
- FIG. 2 is a cross-sectional view showing a structure in which a superconductor of the present invention is cooled in a magnetic field by a permanent
- FIG. 6 is a cross-sectional view of the magnetic levitation device showing the second embodiment of the present invention.
- FIG. 7 is a cross-sectional view of a magnetic levitation device showing a third embodiment of the present invention.
- FIGS. 8 (a) to 8 (d) are schematic explanatory views of the operation of the third embodiment of the present invention.
- FIG. 10 is a perspective view of a magnetic levitation device showing a fourth embodiment of the present invention.
- FIG. 10 is a perspective view of a magnetic levitation device showing a fifth embodiment of the present invention.
- FIG. 11 is a cross-sectional view showing a structure in which a superconductor of a magnetic levitation device according to a fifth embodiment of the present invention is cooled in a magnetic field by an electromagnet
- FIG. 12 shows a sixth embodiment of the present invention.
- FIG. 13 is a perspective view of a magnetic levitation device
- FIG. 13 is a perspective view of a magnetic levitation device showing a seventh embodiment of the present invention
- FIG. 14 is a part of a magnetic levitation device showing an eighth embodiment of the present invention.
- FIG. 15 is a cross-sectional view of a magnetic levitation device according to a ninth embodiment of the present invention.
- FIG. 13 is a perspective view of a magnetic levitation device
- FIG. 13 is a perspective view of a magnetic levitation device showing a seventh embodiment of the present invention
- FIG. 14 is a part of a magnetic levitation device showing an eighth embodiment of the present invention.
- FIG. 15 is a cross-section
- FIG. 16 is a cross-sectional view of a magnetic levitation device according to a tenth embodiment of the present invention.
- FIG. 17 is a perspective view showing a cross section of a part of the magnetic levitation device showing the eleventh embodiment of the present invention.
- FIG. 18 is a partly showing a magnetic levitation device showing the eleventh embodiment of the present invention.
- FIG. 19 is a perspective view showing a cross section of a part of a magnetic levitation device showing a thirteenth embodiment of the present invention.
- FIG. 20 is a perspective view showing a magnetic levitation device showing a fifteenth embodiment of the present invention.
- Levitation equipment FIG. 21 is a perspective view in which a part of a magnetic levitation device showing a fifteenth embodiment of the present invention is shown in cross section.
- FIG. 22 is a perspective view in which a part of the magnetic levitation device is shown.
- 23 is a cross-sectional view of a magnetic levitation device showing the 17th embodiment of the present invention.
- FIG. 24 is a perspective view of a magnetic levitation device showing the 18th embodiment of the present invention.
- FIG. 25 is a perspective view of a magnetic levitation apparatus showing a nineteenth embodiment of the present invention.
- FIG. 1 is a sectional view of a magnetic levitation device showing a first embodiment of the present invention.
- reference numeral 1 denotes a fixed portion, and a high-temperature superconductor 11 having a strong pinning force is accommodated in a cool container 12.
- Numeral 2 denotes a movable part which is a floating body, which is composed of a ferromagnetic material 21 and a work 22 and has an area of a portion facing the high-temperature superconductor 11 and a magnetic flux (not shown) in the high-temperature superconductor 11. Is smaller than the area of the pinned area.
- the superconducting state of the high-temperature superconductor 11 is formed by cooling in a magnetic field with a configuration as shown in FIG. That is, the permanent magnets 51 and 52, which are the magnetic field generating sources, have their magnetic poles oriented in the direction in which they attract each other, and are arranged vertically above and below the high-temperature superconductor 11 and the cold storage container 12.
- the fixed part 1 is previously arranged in such a manner, and liquid nitrogen as a refrigerant is injected into the cool container 12 from the nitrogen inlet 12 b, so that the high-temperature super
- the conductor 11 is cooled to below the critical temperature and cooled in a magnetic field.
- the permanent magnets 5 1 and 5 2 are arranged outside the cold storage container 12. However, if the magnetic properties of the magnets do not change much even at the cooling temperature, the permanent magnets 5 1 and 5 2 are kept cold. It may be arranged inside the container 12. With this configuration, the high-temperature superconductor 11 can be easily cooled in a magnetic field, and the magnetic levitation device according to the present invention can be easily realized.
- the permanent magnet 51 on the side opposite to the side where the movable part exists is kept in place, so that the magnetic flux to be binned when removing the permanent magnet 52 after cooling in the magnetic field is reduced. Reduction can be suppressed.
- the magnetic attraction acting between the high-temperature superconductor 11 and the ferromagnetic body 21 also increases, and the tendency of the magnetic attraction occurring in a gap equal to or less than a predetermined value to decrease.
- an electromagnet may be used as shown in FIG. That is, the electromagnets 53 and 54, which are the magnetic field generation sources, are arranged vertically above and below the high-temperature superconducting insulator 11 and the cool container 12.
- the fixed portion 1 is made to flow a predetermined current through the electromagnets 53 and 54 in advance in a direction in which the generated magnetic fields strengthen each other. Then, by injecting liquid nitrogen, which is a refrigerant, from the nitrogen inlet 12 b into the cool container 12, the high-temperature superconductor 11 is cooled below the critical temperature and cooled in a magnetic field.
- the currents of the electromagnets 53 and 54 are cut off.
- a predetermined current is applied to the electromagnets 53 and 54 for a short time to stop the magnetic flux binning.
- the movable portion 2 made of the ferromagnetic material 2 1 may be arranged, but the movable portion 2 can be fixed at the time of cooling, and the electromagnetic If there is no danger of being attracted by the generated magnetic fields 53 and 54 and colliding with the cool container 12, the movable part 2 may be arranged at a predetermined position before cooling.
- two electromagnets 53 and 54 are arranged outside the cold storage container 12. However, if the heat generated by the joule during current application is not a problem, it may be arranged inside the cool container 12 and surrounding the high-temperature superconductor 11. In this case, one electromagnet is sufficient.
- the superconducting state is maintained by replenishing liquid nitrogen after cooling in a magnetic field, and the nitrogen gas generated by heat generation due to heat invasion from the outside or various kinds of loss inside the high-temperature superconductor 11 is nitrogen gas. Discharge from outlet 1 2a.
- the movable portion 2 is composed of a magnetic attraction force generated when a magnetic flux pinned to the high-temperature superconductor 11 in the fixed portion 1 penetrates the ferromagnetic material 21, and a gravity acting on the movable portion 2. Are balanced and stably hung with a predetermined gap from the fixed part 1.
- FIG. 2 is an enlarged view of a gap between the high-temperature superconductor 11 and the ferromagnetic body 21 in FIG. 1 described above.
- the cooling container 12 and the refrigerant are not shown.
- FIG. 4 (a) schematically shows the distribution of pinned magnetic flux 3 in the absence of ferromagnetic material 21 due to high-temperature superconductor 11 after cooling in a magnetic field. As shown in Fig.
- the portion of the ferromagnetic material 21 facing the high-temperature superconductor 11 has a sufficiently smaller area than the region where the magnetic flux is pinned in the high-temperature superconductor 11.
- the magnetic flux 3 flowing into the ferromagnetic material 2.1 is greatly distorted in the gap, as shown in FIGS. 4 (b) to 4 (d). If the air gap becomes smaller, the force that must increase this strain is too large to bend too much.Therefore, the magnetic flux 3 is set in the high-temperature superconductor 11 in the same direction as the concentration in order to moderate this strain. Try to move in the direction.
- the pinning force of the high-temperature superconductor 11 is acting on the magnetic flux 3, and if the pinning force is greater than the moving force, the magnetic flux 3 cannot move, and some extreme distortion occurs.
- the required magnetic flux 3 cannot maintain the state of being concentrated on the ferromagnetic material 21. That is, when the air gap becomes smaller than a predetermined value, a part of the magnetic flux 3 which has been concentrated up to that point does not pass through the upper end surface of the ferromagnetic material 21 as shown in FIG. The magnetic flux density decreases.
- the magnetic attractive force acting between the high-temperature superconductor 11 and the ferromagnetic body 21 also decreases.
- the movable portion 2 can be stably held in a non-contact state.
- FIG. 5 shows the change of the magnetic attraction force in the process of bringing the ferromagnetic material close to the magnetically cooled high-temperature superconductor and the process of moving it away from the magnetically cooled superconductor when the magnetic levitation device of the first embodiment of the present invention is used.
- the magnetic attraction that increases in the process of bringing the ferromagnetic material 21 closer to the high-temperature superconductor 11 becomes ?? when the air gap length becomes smaller than L1. From one? To 2 On the contrary, it will decrease. After experiencing the process of bringing the ferromagnetic material 21 closer, after the pinning position of the magnetic flux 3 is slightly shifted, hysteresis occurs, and the ferromagnetic material 21 is moved so that the gap length changes from L2 to L1. In the process of moving away, the magnetic attraction increases from F 2 to F 3. When the gap length exceeds L1, the magnetic attraction decreases along the curve of the approaching process.
- Fig. 4 (a) shows the part where the air gap is long and magnetic attraction is not generated.
- Figure 4 (b) and Figure 4 (c) show that the process of increasing magnetic force up to L1 is indicated by the gap length between L1 and L2, where the magnetic attraction decreases.
- (d) Corresponds to the figure. As is clear from Fig.
- the superposed ferromagnet 21 corresponding to the magnetic attraction force in the range of F2 to F1 or F2 to F3 was cooled by a high-temperature superconducting
- the magnetic attractive force and the gravity balance, and this ferromagnetic body 21 is stable and non-contact Can be hung.
- the shape of the ferromagnetic material in this embodiment can be variously changed.
- FIG. 6 is a sectional view of a magnetic levitation apparatus showing a second embodiment of the present invention.
- the fixed part 1 is the same as that of the first embodiment, while the movable part 30 is formed of a spherical ferromagnetic material 31.
- the superconducting state is maintained by performing cooling in a magnetic field as in the first embodiment.
- the movable portion 30 includes a magnetic flux (not shown) pinned to the high-temperature superconductor 11 in the fixed portion 1, a magnetic attraction force generated by penetrating the spherical ferromagnetic material 31, and a movable portion 30.
- the gravity acting on 30 is balanced, and the fixed portion 1 is stably suspended with a predetermined gap. That is, since the surface of the movable portion 30 is spherical, the surface area of the ferromagnetic material 31 facing the high-temperature superconductor 11 is equivalent to a small surface area, which is the same as that of the first embodiment.
- the magnetic attraction force is reduced when the air gap becomes less than a predetermined value, thereby stabilizing the floating. It is trying to make it.
- FIG. 5 is a sectional view of a magnetic levitation device showing a third embodiment of the present invention.
- the fixing part 1 is the same as in the first and second embodiments.
- the movable part 40 as a floating body is composed of a ferromagnetic body 41 and a work 42.
- the ferromagnetic body 41 has three teeth facing the high-temperature superconductor 11. The superconducting state is maintained by performing cooling in the magnetic field as in the first embodiment.
- the movable portion 40 includes a magnetic attractive force generated when a magnetic flux (not shown) pinned to the high-temperature superconductor 11 in the fixed portion 1 penetrates through the ferromagnetic material 41, The gravitational force acting on 0 is balanced and the fixed portion 1 can be stably suspended with a predetermined gap.
- FIGS. 8 (a) to 8 (d) are schematic explanatory diagrams showing the operation principle of the third embodiment of the present invention.
- FIG. 7 is an enlarged view of a gap between the high-temperature superconductor 11 and the ferromagnetic material 41 in FIG. 7 described above.
- the cooling container 12 and the refrigerant are not shown.
- Figure 8 (a) schematically shows the distribution of the pinned magnetic flux 3 of the high-temperature superconductor 11 after cooling by applying a magnetic field near the center and without the ferromagnetic material 41. Represents. As shown in Fig.
- the magnetic flux near the center of the high-temperature superconductor 11 moves from the pinned region to the air gap and the center tooth portion of the ferromagnetic material 41 as shown in FIG. 8 (d).
- the magnetic flux 3 of the high-temperature superconductor 11 flows through the teeth on both sides and the air gap, and is bypassed near the area where the pinning is not performed.
- a part of the bypassed magnetic flux is repelled by the diamagnetism of the high-temperature superconductor 11, and the repulsive force is increased below a predetermined gap, so that the high-temperature superconductor 11 and the ferromagnetic material 4 1
- the magnetic attraction acting between them is reduced. By this action, the magnetic attraction force and the gravity balance to make this ferromagnetic material 41 stable. Can be suspended without contact.
- FIG. 9 is a perspective view of a magnetic levitation device showing a fourth embodiment of the present invention, and is an application example to a magnetic bearing.
- the fixed part 100 is mainly composed of a superconductor 101 having a strong pinning force, two permanent magnets 102 a and 102 b, It is composed.
- the movable portion 110 serving as a floating body is composed of disk-shaped laminated ferromagnetic materials 111 a and 111 b such as a gay metal plate and a rod-shaped ferromagnetic material 112.
- the magnetic flux is as follows: permanent magnet 102 a, back yoke 103, permanent magnet 102 b, superconductor 101, disc-shaped laminated ferromagnetic material 1 1 b through the air gap 1 bar ferromagnetic material 1 12.
- the disk-shaped laminated ferromagnetic material 1 1 1a passes through the path of the superconductor 101 through the air gap, and forms a magnetically closed loop.
- the disc-shaped laminated ferromagnetic materials 1 1 1a and 1 1 1b have the area of the part facing the superconductor 101 pinning the magnetic flux (not shown) in the superconductor 101. Determine the thickness so that it is smaller than the area of the region.
- the movable portion 110 is freely rotatable and stably suspended with a predetermined gap. Therefore, by combining a rotary drive mechanism such as a motor separately with the present embodiment, a three-way air receiver can be easily configured.
- a rotary drive mechanism such as a motor separately with the present embodiment
- a three-way air receiver can be easily configured.
- the magnetic path has a closed structure, the magnetic flux density in the air gap increases, so that the levitation force and levitation stability can be increased.
- disk-shaped laminated ferromagnetic materials 111a and 111b were used to increase the magnetic permeability and prevent loss due to eddy current, but the rotation speed was low and the eddy current was low. If current generation can be ignored or high transmittance is not required, a disk cut from a steel ingot may be used.
- the magnetic bearing of the present embodiment may be used alone, a plurality of magnetic bearings may be used to form a magnetic bearing having a higher levitation force or a long magnetic bearing.
- the two permanent magnets 102 a and 102 b and the back yoke 103 are connected to the superconductor 10. Forces placed immediately above 1 V These may be arranged in plural sets, or may be constituted by one permanent magnet and two yokes in contact with the superconductor 101. Or / 0075 or omitting them, the permanent magnet 1 0 2 a, 1 0 2 b only, or may be only the back yoke 1 0 3 c
- FIG. 10 is a perspective view of a magnetic levitation device showing a fifth embodiment of the present invention, and is an example of application to a magnetic levitation transfer device.
- the fixed portion 120 is mainly composed of a rail-shaped ferromagnetic material 121 having two teeth at its tip.
- the movable part 130 which is a floating body, is composed of a rectangular superconductor 131 having a strong pinning force.
- the magnetic flux passes through the path of the superconductor 13 1, the rail-shaped ferromagnetic material 12 1 through the gap, and the path of the superconductor 13 1 through the gap to form a magnetically closed loop.
- the cold storage container, the work to be transported, and the drive mechanism are not shown.
- the superconducting state of the high-temperature superconductor 13 1 is formed, for example, by cooling in a magnetic field by a configuration as shown in FIG. That is, the electromagnets 6 1 and 6 2 that are the magnetic field generation sources are arranged above the cold storage container 12 that stores the high-temperature superconductor 13 1. For the movable part 130, the electromagnets 6 1, 6 2 are passed through the high temperature superconductor 13 1 in advance in the direction in which the generated magnetic fields are strengthened via the high-temperature superconductor 13 1, and nitrogen is injected into the cold storage container 12.
- the high-temperature superconductor 13 1 By injecting liquid nitrogen as a refrigerant from the inlet 1 2b, the high-temperature superconductor 13 1 is cooled below the critical temperature and cooled in a magnetic field. When the temperature of the high-temperature superconductor 13 1 drops sufficiently and pinning of the magnetic flux (not shown) is completed, the current of the electromagnets 6 1 and 6 2 is turned off. Alternatively, after sufficiently cooling the high-temperature superconductor 131, a predetermined current is applied to the electromagnets 61 and 62 for a short time to pin the magnetic flux.
- the facing area of the tip facing the superconductor 13 1 is smaller than the area of the region where the magnetic flux (not shown) is pinned in the superconductor 13 1.
- the thickness of the dental capital is determined so that
- the movable portion 130 can be freely moved in the direction in which the rail-shaped ferromagnetic material 121 is laid, and can be stably suspended with a predetermined gap. Therefore, if a drive mechanism and a work supporting portion are separately combined with this embodiment, a magnetic levitation transfer device can be easily configured.
- the entire rail-shaped ferromagnetic material 121 or the teeth may be made of laminated gay steel sheet.
- the magnetic levitation device of the present embodiment may be used alone, but a plurality of them may be used to form a higher levitation force or a longer levitation device.
- a magnetic levitation device consisting of a high-temperature superconductor and a ferromagnetic material is commonly used for an ordinary magnet consisting of an electromagnet and a ferromagnetic material, an electromagnet and a permanent magnet, a high-temperature superconductor and a permanent magnet, or a high-temperature superconductor and an electromagnet.
- control of the entire device can be simplified and performance can be improved.
- FIG. 12 is a perspective view of a magnetic levitation device showing a sixth embodiment of the present invention, and is an example of application to a magnetic levitation transfer device.
- the fixed portion 140 is mainly composed of a rail-shaped ferromagnetic material 11 having two teeth.
- the movable part 150 as a floating body is composed of a superconductor 151 having a strong pinning force, two electromagnets 152a and 152b, and a laminated yoke 153.
- the electromagnets 152a and 152b use one side of the magnetic field source at the time of cooling in the magnetic field.
- the magnetic flux is generated by the electromagnet 15 2 a, the laminated yoke 15 3, the electromagnet 15 2 b, the superconductor 15 1, the rail-shaped ferromagnetic material 14 1 through the gap, and the superconductor 15 1 through the gap. It passes through the path and forms a magnetically closed loop. However, the insulated container, the work to be transported, and the moving mechanism are not shown.
- the rail-shaped ferromagnetic material 14 1 has a surface area facing the superconductor 15 1 that is smaller than an area of a region where a magnetic flux (not shown) is pinned in the superconductor 15 1. Determine the thickness of the teeth.
- the current continues to flow through the electromagnets 152 a and 152 b even when the movable part 150 is floating, so that the pin
- the reduction of the stop magnetic flux can be suppressed.
- the magnetic attraction force acting between the superconductor 15 1 and the rail-shaped ferromagnetic material 14 1 becomes large, and the attraction force generated in the gap less than a predetermined value due to the narrowing of the magnetic flux, that is, the restoring force is also strong. Become.
- a magnetic field is generated in the same direction as or opposite to the direction of the magnetic field currently pinned by the superconductor 151, and greater than the lower critical magnetic field of the superconductor 151.
- an instantaneous current flow through the electromagnets 15 2 a and 15 2 b thereby, the amount of magnetic flux pinned to the superconductor 15 1 can be increased.
- the increase or decrease in the amount of magnetic flux pinned changes the magnetic attraction force acting between the superconductor 15 1 and the rail-shaped ferromagnetic material 14 1 and the restoring force caused by the reduction of the magnetic flux. Connect.
- the movable portion 150 can freely move in the direction in which the rail-shaped ferromagnetic material 141 is laid, and is stably suspended with a fixed gap.
- the floating force and the gap length of the movable section 150 can be freely controlled. Therefore, if a drive mechanism and a work supporting portion are separately combined with this embodiment, a magnetic levitation transfer device can be easily configured.
- the rail-shaped ferromagnetic material 141 may be made entirely of a layer or a toothed portion made of a laminated gay metal plate.
- the magnetic levitation device of this embodiment may be used alone, a plurality of levitation devices having higher levitation force or a long levitation device may be used.
- the two electromagnets 15 2 a and 15 2 b and the laminated yoke 15 3 are connected to the superconductor 15 1.
- one set is disposed immediately below, a plurality of these may be disposed. Further, it may be composed of one electromagnet and one U-shaped yoke.
- the laminated yokes 15 3 may be omitted, and only the electromagnets 15 2 a and 15 2 b may be provided.
- the magnetic circuit is formed so as to penetrate the rail-shaped ferromagnetic material 141 in the width direction.
- the electromagnets 152 a and 152 b are connected to the rail-shaped ferromagnetic material 141.
- the magnetic circuit may be arranged in the longitudinal direction.
- the rail-type ferromagnetic material 14 1 only needs to have one tooth portion.
- FIG. 13 is a perspective view of a magnetic levitation device showing a seventh embodiment of the present invention, and is an application example to a magnetic levitation device.
- the present embodiment is obtained by adding a permanent magnet to the fifth embodiment, and is composed of two permanent magnets 17 2a and 17 2b on the side opposite to the gap of the superconductor 17 1 and a backhoe 17 3 Is done.
- the magnetic flux is generated by the permanent magnet 17 2 b, the pack yoke 17 3, the permanent magnet 17 2 a, the superconductor 17 1, the rail-type ferromagnetic material 16 1 through the gap, and the gap It passes through the path of the superconductor 17 1 via CT / JP95 / 00075 and forms a magnetically closed loop.
- the two permanent magnets 17 2 a and 17 2 b and the back yoke 17 3 are arranged as one set immediately below the superconductor 17 1, but a plurality of these may be arranged. Further, it may be constituted by one mizuhisa magnet and one hack that are multipolar magnetized on one side, or one permanent magnet and two yokes in contact with the superconductor 1-1. Alternatively, they may be omitted, or only the check yoke 173 may be provided.
- the magnetic circuit is constituted by a force penetrating the rail-shaped ferromagnetic material 16 1 and the permanent magnets 17 2 a and 17 2 b are connected to the rail-shaped ferromagnetic material 16 1
- the magnetic circuit may be arranged in the longitudinal direction.
- FIG. 14 is a perspective view showing a section of a magnetic levitation device showing an eighth embodiment of the present invention, and is an application example to a magnetic bearing.
- the fixed part 180 mainly consists of a disc-shaped superconductor 18 1 with strong bin stop force, a cylindrical permanent magnet 18 2 a magnetized in the ⁇ direction, and a ring-shaped It consists of a permanent magnet 18 2 b and a knock yoke 18 3.
- the movable part 190 serving as a floating body is mainly composed of a force-feed type ferromagnetic material 191 having a columnar projection at the center.
- the refrigerating container, the rotary drive mechanism, and the shaft are not shown.
- the magnetic flux is generated by a cylindrical permanent magnet 18 2 a, a superconductor 18 1, a central projection 19 1 a of the cup-shaped ferromagnetic material 19 1 via an air gap 19 1 a, It passes through the gap between the superconducting insulator 181, the ring-shaped permanent magnet 182b, and the back yoke 183 to form a magnetically closed loop.
- the central projection 1911a and the outer peripheral portion 1991b of the force-up ferromagnetic material 1991 have an area of a portion facing the superconductor 181, and the Determine the diameter and thickness to be smaller than the area of the area where the magnetic flux (not shown) is pinned.
- the movable portion 190 is freely rotatable and stably suspended with a predetermined gap. Therefore, the magnetic bearing can be easily formed by separately combining a rotating mechanism such as a motor with the present embodiment.
- the magnetic flux is not cut off by the rotation of the movable portion 190. That is, basically, no eddy current is generated in the cup-shaped ferromagnetic material i 9 I, so that it is necessary to take measures against eddy current, such as laminating a silicon steel sheet.
- the magnetic bearing of this embodiment may be used alone, or two magnetic bearings may be separately arranged at both ends of the rotation mechanism.
- the two cylindrical permanent magnets 18 2a and 18 2b and the back yoke 18 3 are connected to the superconductor 1 8 Power placed right above 1 and deformation of this part is free.
- the cylindrical permanent magnets 18 2a and 18 2b used for bias are omitted, only the back yoke 18 3 or only the cylindrical permanent magnets 18 2a and 18 2b are used. good. 1 *
- FIG. 15 is a sectional view of a magnetic levitation apparatus showing a ninth embodiment of the present invention, which is an application example to a flywheel.
- the fixed portion 200 is mainly composed of two block-shaped superconductors 201 a and 201 b having a strong pinning force, and a disk-shaped back yoke 2. It consists of 0 and 2.
- the movable part 210 serving as a floating body is composed of a ferromagnetic body 211 serving as an inertial body and a shaft 212.
- the cooling container and the rotary drive mechanism are not shown.
- the magnetic flux passes through the path of the superconductor 2 O la, the ferromagnetic substance 2 1 1 through the air gap, the superconductor 2 0 1 b through the air gap, and the back yoke 2 0 2, forming a magnetically closed loop. I have.
- the thickness is determined so that it is smaller than the area of the region.
- the movable portion 210 is freely rotatable and can be stably hung with a predetermined gap. Therefore, it is easy to combine a rotary drive mechanism such as a motor with the present embodiment separately. With flywheel integrated magnetic bearing can do.
- the ferromagnetic material 211 which is a main component of the movable portion 210, is integrated from the viewpoint of rotational strength, but there is no problem in mechanical strength, or the ferromagnetic material 211 If the eddy current generated by cutting off the magnetic flux in one rotation becomes a problem, the portion of the ferromagnetic material 211 facing the superconductors 201a and 201b is separated from the multilayer gay It may be made of an elemental steel plate or a funilite having a high specific resistance.
- the magnetic bearing of the present embodiment may be used alone, but a plurality of magnetic bearings having a higher levitation force or a long magnetic bearing may be used.
- FIG. 16 is a sectional view of a magnetic levitation apparatus showing a tenth embodiment of the present invention, which is an application example to a flywheel.
- a permanent magnet is added to the superconductor of the ninth embodiment, and two cylindrical permanent magnets 22 2 a and 22 2 are added to the block-shaped superconductors 22 a and 22 b. b, a knock yoke 2 23, and a magnetic flux, a cylindrical permanent magnet 2 2 2 a.
- the leakage magnetic flux can be minimized as much as possible, and the levitation force and levitation stability can be improved.
- the two cylindrical permanent magnets 2 2 a, 2 2 b and the back yoke 2 2 3 are arranged directly above the block-shaped superconductors 2 2 1 a and 2 2 1 b, the deformation of this part is Be free.
- the cylindrical permanent magnets 2 2 2a. 2 2 2b do not necessarily have to be cylindrical, and may be prismatic.
- the cylindrical permanent magnets 222 a and 222 b used for bias are omitted, and only the back yoke 222 or the cylindrical permanent magnets 222 a and 222 b are omitted. good.
- a force using two attractive force generating portions each composed of a superconductor and a permanent magnet may be used, of course.
- FIG. 17 is a perspective view showing a cross section of a part of a magnetic levitation device showing the eleventh embodiment of the present invention, and shows a magnetic bearing used in a zero gravity state such as in outer space.
- the fixed part 240 is mainly divided into two identical supporting parts, and the superconductors 24 1 a and 24 4 which are processed into a ring shape and have strong pinning force Consists of 1 b.
- the cooling container and the rotating mechanism are not shown.
- the movable portion 250 as a floating body is composed of disk-shaped laminated ferromagnetic materials 25 1 a and 25 1 b such as a gay metal plate, and a shaft 25 2. These magnetically form a closed loop through a gap in each support portion.
- the area of the portion facing the superconductors 24 1 a and 24 1 b is within the superconductors 24 1 a and 24 1 b.
- the thickness is determined so that it is / J smaller than the area of the region where the magnetic flux (not shown) is pinned.
- disk-shaped laminated ferromagnetic materials 251a and 251b were used.However, if the rotation speed is low and eddy currents can be ignored or high permeability is not required, A plate or the like may be used.
- the magnetic bearing of this embodiment may be used alone, a plurality of magnetic bearings having a higher levitation force or a long magnetic bearing may be used.
- FIG. 18 is a perspective view showing a cross section of a part of a magnetic levitation device showing a 12th embodiment of the present invention, and a permanent magnet is added to that of the 11th embodiment. It is composed of permanent magnets 26 2 a to 26 2 f arranged at equal intervals around 1 a and 26 1 b, and outer back yokes 26 3 a and 26 3 b. Note that two permanent magnets to be arranged in the cut portion in the foreground are not shown. The magnetic flux forms a closed loop magnetically through the air gap at each support.
- the number of permanent magnets disposed immediately above the superconductors 26 1 a and 26 1 b is four, but the number is not particularly limited.
- FIG. 19 is a perspective view showing a cross section of a part of a magnetic levitation device showing a thirteenth embodiment of the present invention, which is an example of a levitation device having a mechanism for changing the levitation force or levitation gap of a movable portion.
- the fixed portion 280 is mainly composed of a circular superconductor 281 having a strong pinning force and a circle arranged at equal intervals on the disc-shaped superconductor 281. It is composed of arc-shaped permanent magnets 28 2 a to 28 2 d and a disk-shaped back yoke 28 3.
- the movable part 290 which is a floating body is composed of a force-sop type ferromagnetic material 291 and a shaft 292.
- the cooling container and the rotary drive mechanism are not shown. These magnetically form a closed loop through a gap in each support portion.
- the force-type ferromagnetic material 291, the upper end portion facing the disc-shaped superconductor 281, has a region where the magnetic flux (not shown) is pinned in the disc-shaped superconductor 281. It has a smaller width and has a portion where the force, width, and width change continuously for the number of the arc-shaped permanent magnets 28 2 a to 28 2 d.
- the width of the portion located immediately below the arc-shaped permanent magnets 28 2 a to 28 2 d changes due to the rotation of the cup-shaped ferromagnetic material 291, thereby forming
- the effect of reducing the magnetic attraction and the magnetic flux acting on the ferromagnetic material 291 increases or decreases. That is, the floating force or the floating gap of the movable portion 290 can be made variable. Therefore, by separately combining a rotary drive mechanism such as a motor with the present embodiment, a magnetic levitation device capable of easily changing the levitation force or the levitation gap can be configured.
- the number of the arc-shaped permanent magnets disposed immediately above the disk-shaped superconductor 281 is four, and the number is not particularly limited.
- the fixed portion 280 is provided with a circular arc-shaped permanent magnet 282 a to 282 d and a disk-shaped back yoke 288 It is also possible to omit these forces, or to use only the disc-shaped back yoke 28 3 or only the arc-shaped permanent magnets 28 2 a to 28 2 d.
- FIG. 20 is a perspective view showing a cross section of a part of a magnetic levitation device showing a 14th embodiment of the present invention, and shows an example of a magnetic bearing having increased rigidity in the axial and thrust directions. You.
- the fixed portion 300 mainly includes a disc-shaped superconductor 301a and a ring-shaped superconductor 310b, and a back yoke 302 that supports these.
- the movable part 310 serving as a floating body is composed of a rod-shaped ferromagnetic material 3111 serving as a shaft and a disk-shaped ferromagnetic material 312.
- the cooling container and the rotary drive mechanism are not shown.
- the magnetic flux is generated by the disc-shaped superconductor 3 O la.
- the disc-shaped ferromagnetic material 3 1 2, the ring-shaped superconductor 3 through the air gap 3 It passes through the path of 0 1 b and the back yoke 302 and forms a magnetically closed loop.
- the rod-shaped ferromagnetic material 3 1 1 and the disc-shaped ferromagnetic material 3 1 2 have a disc-shaped superconductor with an area of a portion opposed to the disc-shaped superconductor 310 a and the ring-shaped superconductor 310 b.
- the diameter and thickness are determined so that the area of the area where the magnetic flux (not shown) is pinned in 301 a and the ring-shaped superconductor 310 b is smaller than the area.
- the movable portion 310 is freely rotatable and stably suspended with a predetermined gap.
- the mechanism for generating the supporting force mainly in the axial direction and the mechanism for generating the supporting force mainly in the thrust direction allow the movable part 310 to float. Rigidity and stability can be increased. Therefore, by combining a rotating mechanism such as a motor separately with the present embodiment, it is possible to easily configure a magnetic bracket having high rigidity and high stability.
- the magnetic flux is not cut by the rotation of. That is, basically, no eddy current is generated in the rod-shaped ferromagnetic material 311 and the disc-shaped ferromagnetic material 312, so that it is not necessary to take measures against eddy current such as laminating a silicon plate.
- the magnetic bearing of this embodiment may be used alone, a plurality of magnetic bearings having a higher levitation force or a long magnetic bearing may be used.
- FIG. 21 is a perspective view showing a cross section of a part of a magnetic levitation device showing a fifteenth embodiment of the present invention, which has a configuration in which a permanent magnet is added to the superconductor of the fourteenth embodiment.
- a disk-shaped permanent magnet 32 2 a is provided axially above the disk-shaped superconductor 32 1 a, and a ring-shaped magnet is provided outside the disk-shaped ferromagnetic material 3 32 that forms the movable portion 330.
- Superconductor 3 2 1 b and a ring-shaped permanent magnet 3 2 2 b, and a back yoke 3 2 3 which covers the outside constituting the fixed portion 320.
- the magnetic flux is generated by a circular permanent magnet 3 2 2a and a circular superconductor 3 2 1a.
- the tip of the rod-shaped ferromagnetic material 3 3 1 through the air gap 3 3 1a, a rod-shaped ferromagnetic rest 3 3 1 , A disc-shaped ferromagnetic material 3 3 2, a ring-shaped superconductor 3 2 1 b through a gap, a ring-shaped permanent magnet 3 2 2 b, a back yoke 3 2 3 Make up.
- the circular circular permanent magnet 32 2a and the ring permanent magnet 32 22 Because of the power provided with the magnetic yoke, it is possible to omit these components or to use only the magnetic yoke 3 2 3 or the disk-shaped permanent magnet 32 2 a only or the ring-shaped permanent magnet 32 2 b to form a magnetic bearing. can do.
- FIG. 22 is a sectional view of a magnetic levitation apparatus showing a 16th embodiment of the present invention.
- This embodiment also shows an example of a magnetic bearing with higher rigidity in the axial and thrust directions.
- the fixed portion 340 is mainly composed of a rectangular superconductor 31 1 having a strong pinning force and arranged at an angle of 45 ° with the rotation center of the movable portion 350.
- the movable portion 350 which is a floating body, is composed of ring-shaped ferromagnetic materials 3551a and 351b having a circular cross section, and a ferromagnetic material 3552 also serving as a shaft.
- the magnetic materials 3551a and 351b and the ferromagnetic material 3552 are fixed by welding or the like.
- the cooling container and the rotary drive mechanism are not shown.
- the magnetic flux is a rectangular permanent magnet 3 4 2 c.
- Rectangular superconductor 3 4 1 d, ring-shaped ferromagnet 3 5 1 b .. ferromagnet 3 5 2, ring-shaped ferromagnet 3 5 1 a, rectangular superconductor 3 4 1b, rectangular permanent magnet 3 4 2b, back yoke 3 4 3b CT / JP95 / 00075 is configured.
- the ring-shaped ferromagnetic materials 3 5 1 a and 3 5 1 b have a rectangular superconductor 3 4 1 a to 3 4 1 d whose area facing the rectangular superconductor 3 4 1 a to 3 4 1 d The size is determined so that it is smaller than the area of the area where the magnetic flux (not shown) is pinned in the inside.
- the movable portion 350 can be freely rotated and stably suspended with a predetermined gap.
- the rectangular superconductors 34 1 a to 34 1 d are connected to the rotation center of the movable section 350 and 45. With such an angle, the floating rigidity and stability of the movable portion 350 in the axial direction and the thrust direction can be improved. Therefore, a magnetic bearing with high rigidity and high stability can be easily configured by separately combining a rotary drive mechanism such as a motor with the present embodiment.
- the movable portion 350 can be formed only by combining the ring-shaped ferromagnetic materials 35 1 a and 35 1 b having a circular cross section with the ferromagnetic material 35 2, the movable portion 350 can be manufactured. Very easy.
- the shape of both ends of the movable portion 350 is not particularly limited to this.
- the fixed portions 340 are provided with rectangular rectangular permanent magnets 342 a to 342 d for the vias and back yokes 343 a and 334.
- 3b is provided, these can be omitted, or the magnetic bearing can be configured by using only the back yokes 3443a and 3443b or the rectangular permanent magnets 3442a to 3442d only be able to.
- the pack yokes 3 4 3a and 3 4 3b may be integrated into one body.
- 2 a to 3 4 2 d need not be rectangular, and may be cylindrical.
- FIG. 23 is a sectional view of a magnetic levitation device showing a seventeenth embodiment of the present invention, and is an application example to a magnetic suspension.
- the fixed part 360 is a superconductor with strong pinning force.
- the movable part 370 which is a floating body, has a CT / JP9S / 00075 It is composed of a toothed ferromagnetic material 371 whose teeth are formed by carving a plurality of circular grooves at both ends.
- the cooling container and the rotating mechanism are not shown.
- the magnetic flux is generated by the permanent magnet 36 2 a, the superconductor 36 la, the toothed ferromagnetic body 3 71 through the air gap 3 7 1
- the leftmost tooth 3 7 1 a the inside of the ferromagnetic body 3 71 1, the toothed ferromagnetic Right end tooth 3 3 1 b of body 3 7 1.
- Superconductor 3 6 1 b Via the air gap, passes through the path of permanent magnet 3 6 2 b, back 3 6 3, and forms a magnetically closed loop. ing.
- the areas of the portions facing the superconductors 361a. And 361b are smaller than the area of the region where the magnetic flux (not shown) is pinned.
- the thickness of each tooth and the width and depth of the groove are determined so that as much magnetic flux as possible passes through the tooth surface.
- both ends of the ferromagnetic material (with teeth) 371 are combined so as to have the effect of reducing the magnetic flux as described above and the effect of pulling the magnetic flux obtained by disposing the ferromagnetic material outside the magnetic flux pinning region.
- the ferromagnetic material (with teeth) facing the less surface has teeth at both ends.
- the movable portion 3T0 can be stably suspended with free rotation, force, and a predetermined gap.
- the magnetic bearing can be easily configured.
- the magnetic levitation device of the present embodiment may be used alone, but a plurality of them may be used to provide a higher levitation force or a longer levitation device.
- the magnetic flux is not cut off by the rotation of the movable portion 370.
- no eddy current is generated at both ends of the ferromagnetic material (with teeth) 371, and it is not necessary to take measures against eddy currents such as lamination of silicon steel plates.
- the fixed portion 360 is provided with the permanent magnets 36 2 a and 36 2 b for bias and the back yoke 36 3
- these can be omitted, the knock yoke 36 3 alone, or the permanent magnets 36 2 a and 36 2 b alone can constitute the magnetic bearing.
- a permanent magnet is added to the embodiment.
- the structure is such that two permanent magnets 4 12 a and 4 12 b and a back yoke 4 13 are added to the superconductor 4 11.
- the magnetic flux is generated by the permanent magnet 4 1 2 a, the superconductor 4 1 1, the laminated ferromagnetic material 4 1 through the gap, the superconductor 4 1 1 through the gap, the permanent magnet 4 1 2 b, and the back yoke 4 1 3 And magnetically forms a closed loop.
- the two permanent magnets 4 1 2 a. 4 1 2 b and the back yoke 4 13 are disposed immediately below the superconductor 4 1 1 in order to minimize the leakage magnetic flux.
- a plurality of them may be arranged, or one permanent magnet and two yokes in contact with the superconductor 411 may be used.
- the movable section 4 10 is provided with bias permanent magnets 4 12 a and 4 12 b and a back yoke 4 13. These may be omitted, or only the knock yoke 4 13 or the permanent magnets 4 12 a and 4 12 b for bias may be used.
- the arrangement of the permanent magnets is not limited to this embodiment. It goes without saying that the support base 402 of the fixed part 400 may be made of either ferromagnetic or non-magnetic material.
- a magnetic levitation device comprising a superconductor and a ferromagnetic material described in the above embodiment is replaced with a normal magnetic levitation device comprising an electromagnet and a ferromagnetic material, an electromagnet and a permanent magnet, a superconductor and a permanent magnet, or a superconductor and an electromagnet.
- a normal magnetic levitation device comprising an electromagnet and a ferromagnetic material, an electromagnet and a permanent magnet, a superconductor and a permanent magnet, or a superconductor and an electromagnet.
- liquid nitrogen is used as the refrigerant for the superconductor.
- another refrigerant such as liquid oxygen may be used according to the temperature.
- the critical temperature of the superconductor is higher than room temperature, the cooling container and the cooling medium may not be used.
- non-contact, stable and non-contact floating can be performed without any control only by a combination of at least a high-temperature superconductor and a ferromagnetic material. It is possible to provide a magnetic levitation device that has high mechanical strength, is simple, and is low in cost, and has a large degree of freedom in design.
- FIG. 24 is a perspective view of a magnetic levitation device showing an eighteenth embodiment of the present invention, and is an application example to a magnetic levitation transfer device.
- the fixed portion 380 is mainly composed of four laminated ferromagnetic materials 381 such as a silicon steel plate, and a support base 382 for supporting them.
- the movable part 390 as a floating body is composed of a superconductor 391 having a strong pinning force.
- the drive mechanism and the cool container are not shown.
- the magnetic flux passes through the path of the superconductor 391, the laminated ferromagnetic material 381, via the gap, and the superconductor 391, via the gap, and forms a magnetically closed loop.
- the laminated ferromagnetic material 38 1 is formed such that the area of the portion facing the superconductor 391 is smaller than the area of the region where the magnetic flux (not shown) is pinned in the superconductor 391, and Determine the thickness of each tooth, the distance between teeth, and the height so that as much magnetic flux as possible passes through the tooth surface.
- the magnetic flux of the superconductor 391 is reduced so as to have both the effect of reducing the magnetic flux as described above and the effect of disposing the ferromagnetic material outside the magnetic flux pinning region as in the seventeenth embodiment.
- the laminated ferromagnetic material 381 is also arranged at the fixed portion 380, which faces the unpinned or pinned surface with a sufficiently small magnetic flux.
- the movable portion 390 can be freely moved in the direction in which the laminated ferromagnetic material 381 is laid, and can be stably suspended with a predetermined force and force.
- the magnetic levitation transfer device can be easily configured.
- the magnetic permeability of the fixed portion 380 especially the laminated ferromagnetic material (teeth portion) 381
- the tooth portion 381 may be cut out from a lump and manufactured.
- the magnetic levitation device of the present embodiment may be used alone, but may be used in plural to form a longer levitation device having a higher levitation force.
- the roles of the movable part and the fixed part may be switched. That is, the part described as the fixed part in the embodiment may be the movable part, and the part described as the movable part may be the fixed part.
- FIG. 25 is a perspective view of a magnetic levitation device showing a nineteenth embodiment of the present invention.
- the rotational speed of the wheel is not limited by the mechanical strength of the permanent magnet.
- the magnetic levitation device can be applied to a magnetic receiver, a transfer device, a power storage flywheel, and the like.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Thermally Actuated Switches (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP95906510A EP0695027A4 (en) | 1994-01-25 | 1995-01-24 | MAGNETIC FLOATING DEVICE |
US08/507,276 US5757098A (en) | 1994-01-25 | 1995-01-24 | Non-contact magnetic suspension apparatus using distortion of pinned superconductor field |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP6/6154 | 1994-01-25 | ||
JP615494A JP3595567B2 (ja) | 1994-01-25 | 1994-01-25 | 磁気浮上装置 |
JP29408294A JP3571389B2 (ja) | 1994-11-29 | 1994-11-29 | 磁気浮上装置 |
JP6/294082 | 1994-11-29 |
Publications (1)
Publication Number | Publication Date |
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WO1995020264A1 true WO1995020264A1 (fr) | 1995-07-27 |
Family
ID=26340234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1995/000075 WO1995020264A1 (fr) | 1994-01-25 | 1995-01-24 | Dispositif de sustentation magnetique |
Country Status (3)
Country | Link |
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US (2) | US5757098A (ja) |
EP (1) | EP0695027A4 (ja) |
WO (1) | WO1995020264A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104730906A (zh) * | 2013-12-19 | 2015-06-24 | 宝玑表有限公司 | 磁性定心器件 |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5747426A (en) * | 1995-06-07 | 1998-05-05 | Commonwealth Research Corporation | High performance magnetic bearing systems using high temperature superconductors |
JPH10285835A (ja) * | 1997-03-31 | 1998-10-23 | Nippon Furaihoiile Kk | フライホイール電源装置 |
DE19808738A1 (de) * | 1998-03-02 | 1999-09-09 | Access Ev | Vorrichtung zur berührungslosen Lagerung und/oder Positionierung |
US6416215B1 (en) | 1999-12-14 | 2002-07-09 | University Of Kentucky Research Foundation | Pumping or mixing system using a levitating magnetic element |
DE29905259U1 (de) * | 1999-03-22 | 1999-06-10 | Emhart Inc., Newark, Del. | Schweißvorrichtung mit einem Feldformer |
AU5210300A (en) * | 1999-04-27 | 2000-11-10 | Gebruder Decker Gmbh & Co. Kg | Device for treating silicon wafers |
JP3408203B2 (ja) * | 1999-07-08 | 2003-05-19 | 日興商事株式会社 | 自動開口製袋方法およびその装置 |
JP3094104B1 (ja) * | 1999-08-31 | 2000-10-03 | 工業技術院長 | 超電導磁気浮上輸送システム |
US6758593B1 (en) * | 2000-10-09 | 2004-07-06 | Levtech, Inc. | Pumping or mixing system using a levitating magnetic element, related system components, and related methods |
US8332553B2 (en) * | 2000-09-21 | 2012-12-11 | Hewlett-Packard Development Company, L.P. | Method and apparatus for accessing a contacts database and telephone services |
US7055120B2 (en) * | 2000-12-06 | 2006-05-30 | Cadence Design Systems, Inc. | Method and apparatus for placing circuit modules |
US20030034987A1 (en) * | 2001-08-17 | 2003-02-20 | William Webb | Handheld computer having moveable segments that can be adjusted to affect a size of the handheld computer |
US7692667B2 (en) * | 2001-08-17 | 2010-04-06 | Palm, Inc. | Handheld computer having moveable segments that are interactive with an integrated display |
US6800321B1 (en) * | 2002-05-29 | 2004-10-05 | The Regents Of The University Of California | Reduced AC losses in HTS coated conductors |
US6822879B2 (en) | 2002-08-06 | 2004-11-23 | Emcore Corporation | Embedded electromagnetic interference shield |
JP2004364392A (ja) * | 2003-06-03 | 2004-12-24 | Canon Inc | リニアモータ、及びこれを備えるステージ装置、露光装置並びにデバイス製造方法 |
US7865180B2 (en) * | 2003-06-23 | 2011-01-04 | Palm, Inc. | Automated telephone conferencing method and system |
US7617779B2 (en) * | 2004-11-15 | 2009-11-17 | Sandor Shapery | Linear brushless D.C. motor with stationary armature and field and with integratable magnetic suspension |
US7969054B2 (en) * | 2005-05-23 | 2011-06-28 | Central Japan Railway Company | Superconductivity utilizing support mechanism, and permanent magnet utilizing support mechanism |
JP2007020387A (ja) * | 2005-06-07 | 2007-01-25 | Maguneo Giken:Kk | 超伝導非接触回転装置 |
CN1876959B (zh) * | 2005-06-08 | 2011-08-03 | 上海磁浮交通工程技术研究中心 | 低速(城际)磁浮车辆的悬浮磁铁冷却方法及其装置 |
US7963228B2 (en) | 2007-03-13 | 2011-06-21 | Sandor Wayne Shapery | Magnetic suspension system with integrable propulsion |
US8069792B2 (en) * | 2007-08-01 | 2011-12-06 | Sandor Wayne Shapery | System and method for capturing energy from a railcar |
US8528487B2 (en) * | 2007-08-01 | 2013-09-10 | Sandor Wayne Shapery Wayne Shapery | System and method for operating a vehicle in multiple transportation networks |
US8126519B2 (en) * | 2007-08-31 | 2012-02-28 | Hewlett-Packard Development Company, L.P. | Housing for mobile computing device having construction to slide and pivot into multiple positions |
AU2010229810B2 (en) * | 2009-03-26 | 2014-05-01 | Sandor Wayne Shapery | Method and system for transportation using a magnetic bearing structure |
US8850989B2 (en) | 2010-12-03 | 2014-10-07 | Sandor Wayne Shapery | Magnetic levitation assembly |
US8820246B2 (en) | 2011-12-16 | 2014-09-02 | Sandor Wayne Shapery | Method and system for transportation using a rail structure |
CN103023389A (zh) * | 2012-12-24 | 2013-04-03 | 哈尔滨工业大学 | 一种基于超导磁通钉扎连接的模块化可重构方法及装置 |
DE112014006700B4 (de) | 2014-07-02 | 2022-12-29 | Festo Se & Co. Kg | Transportsystem |
EP3168976B1 (en) | 2015-11-11 | 2018-05-16 | Airbus Operations GmbH | Inspection apparatus and inspection system for inspecting access-restricted spaces and areas |
US11008127B2 (en) * | 2016-10-31 | 2021-05-18 | Zing-Pac, Inc. | Floating platen system |
ES2827898B2 (es) * | 2019-10-08 | 2025-02-12 | Zeleros Global S L | Sistema matricial de suspension electromagnetica para vehiculos de transporte |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3493274A (en) * | 1967-12-18 | 1970-02-03 | Little Inc A | Magnetic support systems |
JPH05240248A (ja) * | 1992-02-27 | 1993-09-17 | Ntn Corp | 超電導磁気軸受装置 |
JPH0678412A (ja) * | 1992-08-25 | 1994-03-18 | Toshiba Corp | 超電導磁気支持装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797386A (en) * | 1987-04-22 | 1989-01-10 | American Telephone And Telegraph Company, At&T Bell Labs | Superconductor-magnet induced separation |
US4939120A (en) * | 1988-08-01 | 1990-07-03 | Cornell Research Foundation, Inc. | Superconducting rotating assembly |
US4917736A (en) * | 1989-03-20 | 1990-04-17 | The United States Of America As Represented By The Secretary Of The Army | Method of transforming a passive ferromagnetic material into a permanent magnet |
US5319275A (en) * | 1990-09-17 | 1994-06-07 | Maglev Technology, Inc. | Magnetic levitation self-regulating systems having enhanced stabilization forces |
US5177387A (en) * | 1990-12-04 | 1993-01-05 | University Of Houston-University Park | High temperature superconducting magnetic bearings |
US5159219A (en) * | 1991-05-16 | 1992-10-27 | University Of Houston-University Park | Opposed-magnet bearing with interposed superconductor |
US5256637A (en) * | 1991-07-22 | 1993-10-26 | Mechanical Technology Inc. | Superconducting coil bearings for rotor load |
JP2547287B2 (ja) * | 1991-07-30 | 1996-10-23 | 株式会社四国総合研究所 | 超電導軸受装置 |
DE69208558T2 (de) * | 1991-08-06 | 1996-09-19 | Koyo Seiko Co | Lagervorrichtung |
US5220232A (en) * | 1991-09-03 | 1993-06-15 | Allied Signal Aerospace | Stacked magnet superconducting bearing |
US5270601A (en) * | 1991-10-17 | 1993-12-14 | Allied-Signal, Inc. | Superconducting composite magnetic bearings |
US5540116A (en) * | 1993-03-03 | 1996-07-30 | University Of Chicago | Low-loss, high-speed, high-TC superconducting bearings |
US5342825A (en) * | 1993-07-16 | 1994-08-30 | The United States Of America As Represented By The Secretary Of The Air Force | Passive superconducting bearing system |
US5532532A (en) * | 1993-09-17 | 1996-07-02 | Martin Marietta Energy Systems, Inc. | Hermetically sealed superconducting magnet motor |
US5495221A (en) * | 1994-03-09 | 1996-02-27 | The Regents Of The University Of California | Dynamically stable magnetic suspension/bearing system |
US5729066A (en) * | 1995-09-22 | 1998-03-17 | General Electric Company | Combined radial and axial magnetic bearings |
-
1995
- 1995-01-24 WO PCT/JP1995/000075 patent/WO1995020264A1/ja not_active Application Discontinuation
- 1995-01-24 US US08/507,276 patent/US5757098A/en not_active Expired - Fee Related
- 1995-01-24 EP EP95906510A patent/EP0695027A4/en not_active Ceased
-
1997
- 1997-12-02 US US08/982,394 patent/US5923109A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3493274A (en) * | 1967-12-18 | 1970-02-03 | Little Inc A | Magnetic support systems |
JPH05240248A (ja) * | 1992-02-27 | 1993-09-17 | Ntn Corp | 超電導磁気軸受装置 |
JPH0678412A (ja) * | 1992-08-25 | 1994-03-18 | Toshiba Corp | 超電導磁気支持装置 |
Non-Patent Citations (3)
Title |
---|
Journal of Electricity Society, Vol. 112, No. 10, October 1992 (10.92), pages 801 to 804, Fig. 6. * |
Journal of Precision Engineering Society, Vol. 58, No. 11, November 1992 (11.92), page 2, upper right Figure. * |
See also references of EP0695027A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104730906A (zh) * | 2013-12-19 | 2015-06-24 | 宝玑表有限公司 | 磁性定心器件 |
Also Published As
Publication number | Publication date |
---|---|
EP0695027A1 (en) | 1996-01-31 |
US5923109A (en) | 1999-07-13 |
US5757098A (en) | 1998-05-26 |
EP0695027A4 (en) | 1997-10-08 |
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