JP2886738B2 - Superconducting motor, superconducting magnet device and superconducting actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION Each invention will be described below. (1) First invention The present invention relates to a motor that rotates an object including a superconductor by utilizing the property of the superconducting state of a second-class superconductor, and a superconductor that can be applied to energy storage. About the motor. (2) Second invention The present invention relates to a support structure for a superconducting magnet device that supports the electromagnetic force, heat shrinkage force, and own weight of the superconducting magnet device, and is difficult to quench. (3) Third invention The present invention relates to a superconducting actuator that conveys or rotates an object by utilizing the property of the superconducting state of a superconductor.
INDUSTRIAL APPLICABILITY The present invention is applicable not only to a transfer device but also to a motor, a flywheel, and the like.

[0002]

2. Description of the Related Art (1) First Invention Conventionally, as a superconducting motor, a motor in which a permanent magnet portion of a general motor is simply replaced with a superconducting coil, or a rotor is levitated by using a superconducting Meissner effect. A flywheel that has reduced friction or that has been similarly raised and rotated using a pinning force is known as a flywheel. (2) Second invention Conventionally, a superconducting coil of a superconducting magnet device is shown in FIG.
As shown in (1), the flanges at both ends of the coil were fixed by cylindrical winding cores connecting the flanges to support the electromagnetic force and the weight of the coil. In such a structure, the force for supporting the electromagnetic force must rely on the tension previously applied to the superconducting wire. In addition, in the impregnation hardening type superconducting coil, the electromagnetic force is supported by the impregnation resin.

(3) Third Invention As a conventional actuator using superconductivity, a superconducting magnet is mainly formed by converting superconductivity into a wire, and the superconducting magnet is used. Known methods for utilizing superconductivity as a bulk material include flywheels that use a pinning force of the superconductor to place and rotate magnets on the superconductor, and transport devices that transport objects using the Meissner effect. Have been. As an example of the transfer device, an actuator developed by Mr. Fujita will be described below (see Dynamics of Electromagnetic Force Applied Equipment, Corona P-122 to 123). FIG.
As shown in FIG. 8, a plurality of superconductors 1 are buried on the upper surface of the stator 11 at predetermined intervals. Stator 1
1, a slider 10 in which a plurality of permanent magnets 9 are embedded on the lower surface at a pitch different from that of the superconductor is disposed opposite to the surface on which each superconductor 1 is embedded.

When the superconductor 1 is cooled to a temperature lower than its critical temperature and enters a superconducting state, the superconductor 1 tries to remove the magnetic flux from the permanent magnet 9, and the so-called Meissner effect causes the permanent magnet 9 And the superconductor 1 repel each other, and the slider 10 floats from the stator 11. Here, when observing the individual superconductors and permanent magnets, oblique forces are also acting, but as a whole, the lateral forces are canceled out and floated. Next, when a specific part of the superconductor is changed to a normal conduction state by an electric current or the like, the canceled lateral force is restored, and the slider 10 can be driven in the horizontal direction.

[0005]

Problems to be Solved by the Invention (1) First Invention However, in the conventional example in which the magnet portion of a general motor is a superconducting coil, the superconductor must be made into a wire and used as a coil. Because there is a mechanical contact part such as a brush,
The rotation speed was also limited. In addition, motors that use the Meissner effect have low levitation force due to the Meissner effect,
There were considerable restrictions on the weight of the rotor. FIG. 3 shows a principle diagram of a conventional material technique of a motor using a pinning force. In the figure, 1 is a superconducting rotor, 2 is a permanent magnet, and 3 is a rotating shaft. In such a configuration, the holding of the levitation force and the levitation position is certainly improved compared to the one using the Meissner effect, but the fact that the rotary drive must be provided in another part of the rotating shaft has the There is no difference from the motor used, and the size of the motor increases, and when there is mechanical contact with the rotation drive unit, the rotation speed and the like are limited. Conversely, with such a motor, the controllability of the rotation deceleration and stop was also poor. Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and it is not necessary to use a superconducting wire, a high-speed rotation and a high-speed control with a simple configuration, a high torque, and an efficient superconductivity. To provide a motor.

(2) Second invention Since the conventional superconducting coil is used at a very low temperature, both the winding frame and the superconducting coil thermally shrink at a very low temperature, and the difference in the heat shrinkage causes the superconducting coil to be preliminarily heated at room temperature. The tension of the superconducting wire applied to support the electromagnetic force generated by the superconducting coil did not work effectively. Therefore, there is a problem that the superconducting coil moves when the coil is energized, and is easily quenched. Also, in the impregnated hardening type superconducting coil, cracks in the impregnated resin and peeling of the impregnated resin from the flange surface due to both the stress applied to the impregnation range due to the difference in the heat shrinkage and the electromagnetic force generated by the superconducting coil. There is a problem that it occurs and is easily quenched. Accordingly, an object of the present invention is to provide a superconducting magnet device that does not easily cause quench caused by the above-mentioned heat shrinkage and electromagnetic force.

(3) Third invention However, the above-mentioned prior art has the following problems. The actuator using the Meissner effect has a weak force, it is difficult not only to move a heavy substance, but also does not float, and its use is limited to a small actuator. Also, the actuator itself must be horizontal, and it is difficult to drive in an inclined plane. Further, a flywheel using pinning can be applied to a large-sized flywheel. However, since the magnet is only levitated, it must be used in combination with another driving method. In addition, when a large superconductor is used, there is a problem that it takes time to cool the inside of the superconductor. Accordingly, an object of the present invention is to solve the above-mentioned problems, it is not necessary to wire the superconductor, the driving force and the torque are large, the cooling time of a large superconductor is greatly reduced, and the position controllability is further improved. It is to provide a good actuator.

[0008]

The above objects are achieved by the present invention described below. (1) That is, a first aspect of the present invention includes a rotor having a rotation axis and including a superconductor, a means for cooling the rotor to a temperature lower than a superconducting transition temperature, and a means for applying a magnetic field to the rotor. A plurality of means for applying the magnetic field are provided in the envelope in which the rotor is disposed, and the means for applying the plurality of magnetic fields without rotating the envelope is formed by: A superconducting motor that rotates the rotor by rotating a magnetic field whose direction in the direction of the rotor rotation axis near the outer periphery of the rotor is alternately reversed along the circumference of the rotor around the rotation axis. A superconducting motor characterized in that a superconducting bearing is used as the bearing. (2) The second invention provides a cylindrical superconducting coil,
A support ring that supports a part of the outer coil in the radial direction,
A superconducting magnet device characterized by being movable along a support ring rail having a taper with respect to a coil center axis.

(3) A third invention relates to a superconducting actuator driven by applying a magnetic field, wherein the superconducting material has a rod-shaped non-magnetic material having a thermal conductivity of 10 W · m ⁻¹ · K ⁻¹ or more at room temperature. A superconducting actuator having a superconducting region, wherein a magnetic flux is trapped in the non-superconducting region, and the superconductor itself or the magnetic field generating unit is driven by changing the position and / or angle of the magnetic flux. A superconducting actuator characterized by the following.

[0010]

Operation (1) First invention The operation of the present invention will be described with reference to FIGS. 1 and 2, 1 is a superconducting rotor, 3 is a rotating shaft,
4 represents a magnetic field line. FIG. 1 is a view of the rotor viewed from a direction perpendicular to the rotation axis, and FIG. 2 is a view of the rotor viewed from a direction parallel to the rotation axis. At room temperature (possible during or after cooling), a magnetic field is generated in the superconducting rotor by any magnetic field generating means as shown in FIGS. Here, the black circles in FIG. 2 indicate the direction of the magnetic flux from the top to the bottom of the paper, and the crosses indicate the direction of the magnetic flux from the bottom to the top of the paper. At this time, the rotor and the magnetic flux are not rotating. When the rotor is cooled below the transition temperature of the superconductor in this state, the magnetic flux that has entered the rotor is partially removed to the outside of the rotor, but most is trapped and fixed at the pin center of the superconductor. Is done. This is a so-called pinning, and the type 2 superconductor tries to keep the penetrating magnetic flux in its position. Next, the magnetic field distribution applied to the rotor is rotated as shown in FIG. 2 while keeping its shape as small as possible. When the magnetic flux starts to rotate,
Rotational force is also applied to the pin center from the magnetic flux, and as a result, the rotor also starts rotating. In this way, a superconducting motor can be realized by rotation of magnetic flux.

At this time, the cooling of the rotor includes cooling of the gas around the rotor, cooling by heat conduction from the rotating shaft,
Cooling is also possible by filling the outer periphery of the rotor with liquid nitrogen, oxygen, hydrogen, helium, or the like. Also, in the magnetic field distribution, by reducing the magnetic field intensity inside the rotor as compared to the outside of the rotor as shown in FIG. 1, it is possible to reduce blurring in the axial direction and in the direction perpendicular to the axis. In addition, as the superconducting material used for the superconducting rotor of the present invention, in principle, any type 2 superconductor can be used, but in consideration of the high superconducting transition temperature and the strong pinning force, A material having a so-called 123 structure of a copper oxide superconductor is optimal. As such a material, LnBa ₂ Cu ₃ O _y
And _{LnSr 2 Cu 3-x M x} O y and (Ln, Ca, S
_{r, Ba) 3 Cu 3-} x M x O y and the like. Here, Ln is Y or a lanthanoid element or a mixture thereof, and M is Ti, V, Co, Fe, Ga, Ge, M
o, W, Re or a mixture thereof, and 0 ≦ X
≦ 1, 6 <y <8. It is also effective to add a noble metal such as silver or platinum to these materials to further improve the characteristics.

Further, when a superconducting bearing made of a superconductor having a high pinning force is used for the bearing of the rotating shaft, the rotor and the outside are not in contact with each other, which is effective in terms of high speed rotation and no dust. It is. (2) Second invention The operation of the present invention will be described with reference to FIGS. 9, 10 and 11. 9 and 11 are sectional views of the superconducting magnet device of the present invention, and FIG. 10 is a plan view of the superconducting magnet device of FIG.

In the superconducting magnet device of the present invention, the difference in the thermal contraction rate between the superconducting coil 1 and the supporting ring 2 supporting the same in FIG. By moving the support ring 2 along the axis, the force applied in the coil inner diameter direction at both room temperature and extremely low temperature is always constant. Thereby, the stress applied to the coil or the impregnated resin due to the difference in the heat shrinkage can be kept constant. What is necessary is just to set the weight of the support ring 2 so that the magnitude of this stress may be kept below the allowable value. In addition, the quench caused by the movement of the superconducting coil can be prevented by fixing the support ring 2 with bolts 6 to support the electromagnetic force moving outward in the coil radial direction generated when the superconducting coil is energized. I can do it. Bolt 6
May be a piston 7 as shown in FIG. 11. In this case, the force applied to the piston 7 may be controlled so as to suppress the rise of the support ring 2 corresponding to the electromagnetic force. With such a structure, a superconducting magnet device that is essentially difficult to quench can be obtained. In addition, since there is no supporting structure on the inner side of the superconducting coil, the inner diameter of the coil can be reduced, so that a compact superconducting magnet device can be obtained.

(3) Third invention The operation of the present invention will be described with reference to FIGS. FIG. 16 is a schematic diagram of a so-called pinning phenomenon. In the figure, 1 is a second type superconductor, 9 is a permanent magnet, and 4 is a line of magnetic force. As shown in the figure, in the second type superconductor, a magnetic field enters the superconductor and is trapped in the pinning center. By moving the magnetic field trapped in this pinning center,
Superconductors can also be driven, and their forces are much greater than those using the Meissner effect. However, the degree of change in the magnetic field distribution in the superconductor cannot be so large, and therefore, rotation or sliding easily occurs. The present invention utilizes pinning and the Meissner effect in combination, and the principle is shown in FIG. In the figure, reference numeral 1 denotes a superconductor having a hole and strong pinning, and shows a cross section thereof. The hole should be a non-superconductor, even a real hole,
It may contain a non-superconducting material. The magnetic field distribution in the superconductor having a hole is concentrated in the hole as shown in FIG. 17 due to the Meissner effect. When the magnetic field is moved in the direction of the arrow in this state, a large change in the magnetic field distribution is formed in and around the hole, so that a very strong pinning action works, and the superconductor 1 is also driven in the direction of the arrow. Is done. The above is the principle of the present invention. It is desirable that this non-superconducting region is formed in a rod shape in a direction perpendicular to the driving direction, but when a braking force other than the driving force is required for preventing blurring or the like. Can be applied to holes other than vertical and bent rod-shaped holes.

In consideration of cooling efficiency, the non-superconducting region is preferably a space or a material having good heat conductivity. A more preferable condition is that the thermal conductivity is 10 W · m ⁻¹ · K.
Silver, platinum, gold, copper, tin, tungsten, brass, stainless steel, etc. of ^-1 or more are preferred. Further, as the superconducting material, a material capable of obtaining strong pinning is preferable, and YBa ₂ C
u ₃ O _y and _{(Ln, Ca) Sr 2 Cu} 3-x M x O
_y (Ln = Y or lanthanoid element, M = Ti, V, C
o, Fe, Ga, Ge, Mo, W, Re, 0.05 <x
≦ 1).

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. (First Invention) Reference Example FIG. 4 shows a reference example of the present invention, in which 1 is a superconducting rotor, 3 is a rotating shaft, 7 is a field coil, and 8 is a stator. The rotor is Y _0.8 Ca _0.2 SrBaCu _2.9
Re _0.1 O _7.2 Tc = 80K superconductor Y ₂ B
aCuO ₅ and Pt are dispersed materials. In cooling the rotor, a cooled helium gas is circulated so that the rotor can be cooled from room temperature to 15K.

This embodiment is an example of a type in which a magnetic field is applied perpendicularly to the rotation axis of the rotor. First, the operation principle of the motor shown in FIG. 4 will be described with reference to FIG. During the cooling of the rotor or before the cooling, a current is applied to 7a and 7d as shown in FIG. On this occasion,
A magnetic field as shown in the figure is generated in the rotor portion. When the rotor cools below 80K, this flux is trapped in the rotor. After the rotor is sufficiently cooled, the current flowing through 7a, 7d is gradually reduced to 7b,
Move to 7e. Then, the magnetic field generated by the field coil 7 rotates in the direction indicated by the arrow in FIG. 5, that is, clockwise. Then, a force is applied to the pinning center in the superconductor of the rotor, and the rotor starts to rotate in accordance with the rotation of the magnetic field. When the current is completely transferred to 7b and 7e,
Both the magnetic field and the rotor are rotated by 60 °. Next, 7b, 7
The current flowing in e is transferred to 7c and 7f. By continuing such a current operation, the rotor can be rotated clockwise, and by performing the reverse operation, the rotor can be rotated left. At this time, if the increase or decrease of the current is performed in a sinusoidal manner, the rotation can be made smooth.
It is preferable to use an M inverter. Although the superconducting motor created in this way has a slightly lower torque, it is easier to rotate and control at higher speeds than the conventional superconducting motor.
Further, miniaturization is also possible.

Embodiment 1 Next, an embodiment of the present invention will be described. FIG. 6 is a sectional view of the motor, and FIG. 7 is a plan view showing the lower electromagnet arrangement. In the figure, 1 is a superconducting rotor, 3 is a rotating shaft, 9 is a driving electromagnet, 10 and 11 are cooling gas inlet / outlet pipes, 1
2 is a magnet for bearing, and 13 is a superconducting bearing for bearing. In the present embodiment, unlike the reference example, the main driving magnetic field is directed in the direction of the rotation axis as in FIGS.
FIG. 8 shows the strength of the magnetic field on each of the electromagnets 9a to 9r around the rotor circumference, where + B indicates upward and -B indicates downward. Next, an operation method of the present embodiment will be described. First, the rotor is stopped at the center, and a magnetic field is applied as shown in FIG. For this purpose, the current in the upper and lower electromagnet rows 9 in FIG. 6 may be controlled. Then, four magnetic field portions N, S, N, and S are obtained along the circumference of the rotor portion.

When a magnetic field is created with such upper and lower electromagnets,
As shown in FIG. 1, a stronger magnetic field is obtained above and below the rotor portion than inside the rotor. Next, a sufficiently cooled liquid helium gas is injected from the gas inlet 10. As in the case of the reference example, when the rotor temperature is lower than the superconducting transition temperature, the magnetic flux is trapped as it is. After the rotor is sufficiently cooled, current control of each electromagnet is performed so that the magnetic field distribution moves in the direction of the arrow in FIG. 8, that is, in the clockwise direction in FIG. In this manner, the rotor starts rotating according to the same principle as that of the reference example according to the rotation of the magnetic field distribution. Further, since the superconducting bearing 13 is also cooled, the vibration of the rotating shaft in a direction other than the rotation is suppressed, and the rotating shaft acts as a bearing. This embodiment is more complicated in configuration than the reference example, but has the effect of increasing the torque,
Compared to the prior art, it is superior in terms of high-speed rotation, rotation speed control, and torque. Also, since the strength of the magnetic field is smaller inside and below the rotor, vibrations of the rotor up and down can be suppressed.

(Second Invention) Embodiment 1 An embodiment of a superconducting magnet device according to the present invention will be described with reference to FIGS. FIG. 9 is a sectional view of the superconducting magnet device of the present invention, and FIG. 10 is a plan view thereof. In the structure of the superconducting magnet device according to the present invention,
As shown in FIG. 9, a support ring 2 for supporting the outer periphery of the superconducting coil 1 inward in the coil radial direction by its own weight is parallel to the coil center axis along the coil center axis and a support ring rail 3 having a taper. It is movable. This makes it possible to always support the superconducting coil 1 with a constant force from room temperature to the extremely low temperature at which the superconducting magnet device operates. That is, the superconducting coil 1 and the support ring 2
There is no need to worry about the difference in heat shrinkage of Next, a case where power is supplied to the superconducting magnet device cooled at an extremely low temperature as described above will be described. When energized, the electromagnetic force moves outward in the radial direction of the coil, and the coil tends to expand. However, in order to prevent the expansion, the support ring is fixed to a stable position in a state where the electric current is not energized using the bolt 6. Thereby, the superconducting coil 1 can be stably supported without using excessive force.

In this embodiment, the superconducting coil 1 impregnated and cured by the epoxy resin is used. However, if the contact portion with the support ring 2 is insulated, the superconducting coil 1 does not need to be of the impregnating and curing type. Any structure may be used. Further, the support ring 2, the support ring rail 3 and the bolt 6 are made of austenitic stainless steel, but may be made of any non-magnetic metal material. Further, the shape of the support ring 2 may be any shape as long as it is in proper contact with the superconducting coil 1, and the bolt 6 in FIG. 6 at intervals
However, any number may be used as long as the support ring 2 can be fixed stably. By supporting the superconducting coil 1 with such a structure, the stress applied to the impregnated resin or the superconducting coil due to cooling can be made constant, and the expansion of the superconducting coil 1 due to the electromagnetic force generated during energization is prevented. It becomes possible. For this reason, it is possible to prevent quench caused by the release of strain energy due to cracks in the impregnated resin and quench caused by frictional heat generated by the movement of the superconducting coil. Become.

Embodiment 2 FIG. 11 is a sectional view of another embodiment of the present invention. The piston 7 corresponds to the bolt 6 of the first embodiment, and the support ring 2
, The outer periphery of the superconducting coil 1 can be pressurized inward in the coil radial direction with a desired pressure. Therefore, the superconducting coil 1 can be stably supported regardless of the weight of the support ring 2. Therefore, the weight of the superconducting magnet device can be further reduced. During cooling, the pressure of the piston 7 can be reduced to minimize the stress generated in the coil due to thermal shrinkage, and prevent the impregnated resin from cracking. In addition, by controlling the pressure applied to the piston 7 in accordance with the electromagnetic force generated by the superconducting coil 1 at the time of energization, the movement of the superconducting coil 1 is sealed and quenching is prevented. Further, even if any abnormality occurs in the superconducting coil 1, it can be detected by constantly monitoring the pressure applied to the piston. With such a structure, a superconducting magnet device that is compact, hard to quench, and has high safety is obtained.

(3) Embodiment of Third Invention Embodiment 1 FIGS. 13 and 14 show an embodiment in which the present invention is applied to a horizontal transfer device. FIG. 13 is a plan view seen from above. 14 is a cross-sectional view when viewed from the lateral direction. 1 in the figure is Y
Ba ₂ Cu ₃ O _y in a strong superconductor of pinning by dispersing _Y 2 BaCuO _5, 2 is a hole formed many to the superconductor, 3 is an electromagnet column for driving, the 4 It represents the line of magnetic force at a certain moment. Next, the operation of the present embodiment will be described. First, when the temperature of the superconductor 1 is equal to or higher than the superconducting transition temperature, a magnetic field as shown in FIG. At this time, the superconductor 1 is slightly floated from the electromagnet row 3 by a spacer or the like.

Next, the superconductor 1 is gradually cooled. When the superconductor starts the superconducting transition, the magnet wire is slightly left in the superconductivity, but a large part is removed outside by the Meissner effect, as shown in FIG. Even if the spacer is removed in this state, the superconductor 1 is floating on the spot because of the Meissner effect and the pinning force. Next, the electromagnet row 3
To move the magnetic field line distribution to the right. Then, the superconductor 1 receives the left force of the line of magnetic force mainly from the side surface of the hole 2, and the superconductor 1 also moves to the right. Although the present embodiment relates to conveyance in a certain direction, a device which can freely convey a linear electromagnet array in a plane by laying circular electromagnets on the line is also possible. Further, in the present embodiment, since the superconductor 1 cooled once has a braking force acting up and down due to the pinning force, there is no problem even if the entire body is tilted. In addition, the levitation force hardly changes compared to the case where no hole is opened,
The driving force has increased several times.

Embodiment 2 FIG. 15 shows an example in which the present invention is applied to a rotary motor, and shows a rotor cross section. 5 in the figure is YSr ₂ Cu
_A rotor made of a superconductor having a composition of _2.85 Re _0.15 O _y , 6 is a copper rod for rotational driving embedded in the rotor perpendicular to the rotation axis, and 8 is a rotating magnetic field for driving. As for the driving method, cooling is performed slowly in a state where a magnetic field is applied as in the first embodiment.
At this time, the direction of the magnetic field is made to coincide with the direction of the rod 6. When the temperature of the rotor 5 becomes equal to or lower than the superconducting transition temperature, a part of the lines of magnetic force that have penetrated the rotor are eliminated outside the rotor and inside the rod 6, and the magnetic field inside the rod 6 becomes strong. Next, the magnetic field is changed to B → B '
To rotate. The rotating magnetic field can be obtained by applying a PWM inverter similar to that used for a blankless DC motor or an induction motor. When the magnetic field starts to rotate, a torque is mainly applied to the rotor by the pinning force and the Meissner effect from the magnetic flux that has entered the copper bar 6, and the rotor starts to rotate. The rotation speed and direction of the rotor can be easily controlled by changing the rotating magnetic field. In the motor of the present invention, both the torque and the cooling efficiency were improved as compared with the motor having no holes.

[0026]

As apparent from the above description, the present invention has the following effects. (1) Effects of the First Invention (a) An efficient superconducting motor can be obtained without using a superconductor as a wire. (B) It is possible to obtain a high-torque motor that can perform high-speed rotation and rotation speed control with a simple configuration. (C) If a superconducting bearing is also used, a non-contact rotor can be obtained, so that high-speed rotation is possible, powder due to friction is not generated, and use in vacuum is also possible.

(2) Effects of the Second Invention (a) Due to the difference in the heat shrinkage between the superconducting coil and the supporting material, the stress applied to the superconducting coil, which has conventionally occurred, is
It is possible to always keep the temperature constant without changing the temperature and to effectively prevent the impregnated resin from cracking. (B) It is possible to prevent expansion of the coil due to electromagnetic force applied to the outside in the radial direction of the coil, which is generated when the superconducting coil is energized, and to prevent quench caused by frictional heat generated by moving the superconducting coil. (C) A compact and highly reliable superconducting magnet device having a simple configuration is provided.

(3) Effects of the Third Invention (a) Since both the Meissner effect and the pinning force are used, it is possible to increase the driving force and the torque. (B) The cooling efficiency can be improved. For this reason, the cooling time of the large superconductor can be significantly reduced. (C) The braking force is increased and the position controllability is improved. (D) There is no need to convert the superconductor into a wire.

[Brief description of the drawings]

 (First invention)

FIG. 1 is a sectional view of the principle view of the present invention.

FIG. 2 is a plan view of the principle view of the present invention.

FIG. 3 is an elevation view of a rotor in a conventional postoperative operation.

FIG. 4 is a schematic view of a motor according to the first embodiment.

FIG. 5 is a principle diagram of the first embodiment.

FIG. 6 is a sectional view of a motor according to a second embodiment.

FIG. 7 is an arrangement diagram of driving magnets for the motor according to the second embodiment.

FIG. 8 is a distribution diagram of the magnetic field of the motor according to the second embodiment (second invention).

FIG. 9 is a sectional view of a superconducting magnet device according to the first embodiment of the present invention.

FIG. 10 is a plan view of a superconducting magnet device according to the first embodiment of the present invention.

FIG. 11 is a sectional view of a superconducting magnet device according to a second embodiment of the present invention.

FIG. 12 is a sectional view showing an example of a conventional superconducting magnet device. (Third invention)

FIG. 13 is a diagram illustrating the present invention implemented for horizontal conveyance.

FIG. 14 is a cross-sectional view when the present invention is implemented for horizontal conveyance.

FIG. 15 is a sectional view in which the present invention is applied to a rotary motor.

FIG. 16 is an explanatory diagram of a pinning phenomenon.

FIG. 17 is a principle view of the present invention.

FIG. 18 is a diagram showing a conventional technique.

[Explanation of symbols]

 (FIGS. 1 to 8) 1. Superconducting rotor 2. Permanent magnet 3. Rotating shaft 4. Magnetic flux 5. Magnetic flux distribution area (from bottom to top of the paper) 6. Magnetic flux distribution area (from top to bottom of the paper) 7. Field coil DESCRIPTION OF SYMBOLS 8 ... Stator 9 ... Drive magnet 10 ... Cooling gas inlet 11 ... Cooling gas outlet 12 ... Permanent magnet for superconducting bearing 13 ... Superconducting bearing for superconducting bearing (FIGS. 9-12) 1 .... Superconducting coil 2 .... Support Ring 3 ... Support ring rail 4 ... Lower flange 5 ... Upper flange 6 ... Bolt 7 ... Piston 8 ... Cylindrical core 9 ... Support (FIGS. 13 to 18) 1 ... Superconductor 2 ... Hole 3 ... Electromagnet row 4 ... Magnet wire 5 ... Rotor 6 ... Copper rod 7 ... Rotating shaft 8 ... Rotating magnetic field 9 ... Permanent magnet 10 ... Slider 11 ... Stator

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification symbol FI H01F 6/00 ZAA (72) Inventor Norio Kaneko 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) Reference Document JP-A-5-272484 (JP, A) JP-A-4-109861 (JP, A) JP-A-4-119221 (JP, A) JP-A-3-82939 (JP, A) JP-A 64-64 60917 (JP, A) JP-A-59-40506 (JP, A) JP-A-1-146796 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 55/00 H02K 49 / 06 F16C 32/04 H01B 12/00 H01F 5 / 08,7 / 22

Claims (7)

(57) [Claims] And 1. A rotor comprising a superconductor has an axis of rotation, applied means for cooling the rotor to below the superconducting transition temperature, e Bei and means for applying a magnetic field to the rotor, a magnetic field A plurality of means are provided in an envelope in which the rotor is disposed, and the means are formed by means for applying the plurality of magnetic fields without rotating the envelope, and the rotor is provided near an outer periphery of the rotor. In a superconducting motor that rotates the rotor by rotating a magnetic field whose direction in the direction of the rotation axis is alternately reversed along the circumference of the rotor around the rotation axis, the bearing of the rotor
A superconducting motor characterized by using a superconducting bearing . 2. The superconductor has a composition formula of LnBa ₂ Cu.
₃ O _y or _{LnSr 2 Cu 3-x M x} O y or (Ln,
Ca, Sr, Ba) ₃ Cu _3-x M _x O _y (where Ln is Y or a lanthanoid element or a mixture thereof, and M is Ti, V, Co, Fe,
It is an element of Ga, Ge, Mo, W, and Re or a mixture thereof, where 0 ≦ X ≦ 1 and 6 <y <8. The superconducting motor according to claim 1, wherein a material represented by the following formula is used. 3. A cylindrical superconducting coil, wherein a support ring for supporting a part of the outer periphery of the coil in a radial direction of the coil is movable along a support ring rail tapered with respect to the coil center axis. Superconducting magnet device. 4. The superconducting magnet device according to claim 3 , wherein a force is applied to the support ring to control a radial pressure applied to the coil by the support ring. 5. A superconducting actuator driven by applying a magnetic field, wherein the superconducting material has a rod-shaped non-superconducting region having a thermal conductivity of 10 W · m ⁻¹ · K ⁻¹ or more at room temperature. A superconducting actuator, characterized in that a magnetic flux is trapped in the non-superconducting region and the position and / or angle of the magnetic flux is changed to drive the superconductor itself or the magnetic field generating unit. . 6. The superconducting actuator according to claim 5 , wherein the non-superconducting region is a rod-shaped hole. 7. The composition according to claim 1, wherein the superconductor has a composition formula of YBa ₂ Cu _3.
O _y or _{(Ln, Ca) Sr 2 Cu} 3-x M x O y (L
n = Y or lanthanoid element, M = Ti, V, Co, F
e, Ga, Ge, Mo, W, Re, 0.05 <x ≦ 1)
The superconducting actuator according to claim 5, which is a material represented by: