JP2007166812A - Magnetic levitation propulsion system and magnetic levitation railway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic levitation propulsion system which can minimize pitching and a magnetic levitation railway using the above magnetic levitation propulsion system. <P>SOLUTION: The magnetic levitation propulsion system is equipped with levitation coils and propulsion coils which are arranged along a specified shifting course, and a field which confronts the above levitation coil and the propulsion coil and shifts along the above shifting course, receiving force for lift from the above levitation coil and receiving propulsion force from the above propulsion coil, and the above field has an even number of magnetic poles in the shifting direction, and also the magnetomotive force in the magnetic poles at the front end and the rear end is smaller than the electromotive force in the magnetic pole at the center. The magnetic levitation railway uses the above magnetic levitation propulsion system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a magnetic levitation propulsion system and a magnetic levitation railway, and in particular, a magnetic levitation propulsion system with a small pulsating force acting between the levitation coil and a field even when the levitation coils are arranged at a pitch of 120 degrees. And a magnetic levitation railway using the magnetic levitation propulsion system.

  Recently, in magnetic levitation railways, it has been studied to improve the efficiency and power factor of a linear motor by making the magnetic pole pitch of the propulsion coil smaller than the standard magnetic pole pitch of the superconducting coil on the vehicle (Patent Document 1). .

In addition, it has been studied to reduce the leakage magnetic field entering the cabin by setting the magnetic pole pitch at both ends of the superconducting coil on the vehicle to be smaller than the magnetic pole pitch at the center (Non-Patent Document 1).
Japanese Patent No. 3323452 Murai, Yodogawa, Characteristics at the time of increase of magnetomotive force in superconducting magnet arrangement with reduced leakage magnetic field, IEEJ Transactions D, Vol. 124, No. 9, pp 962-967 (September 2004)

  In recent years, six levitation coils and propulsion coils are replaced with a 60-degree pitch opposed to a pair of adjacent magnetic poles of a superconducting coil on a vehicle, and 3 for a pair of adjacent magnetic poles of a superconducting coil on a vehicle. It has been studied to improve the economic efficiency of the system by halving the number of levitation coils and propulsion coils by arranging the levitation coils and propulsion coils at a pitch of 120 degrees where the levitation coils and the propulsion coils face each other.

  Here, in the magnetic levitation railway, when the superconducting coil on the vehicle mounted on the linear motor car passes near the levitation coil, an induced current is generated in the levitation coil by the induced electromotive force from the superconducting coil on the vehicle, and the induction The electric current generates a fundamental magnetic field having the same magnetic pole pitch as that of the superconducting magnet and a harmonic magnetic field having a magnetic pole pitch shorter than that of the superconducting magnet. Although the fundamental wave magnetic field is a stationary magnetic field, the pulsating power in the vertical direction is generated in the superconducting coil on the vehicle by the harmonic magnetic field which is a variable magnetic field. Thereby, the linear motor car pitches.

  In the 60-degree pitch adopted so far, the magnetic pole pitch of the harmonic magnetic field is short and the amount thereof is small, so that a large pitching that causes a problem did not occur, but in the newly adopted 120-degree pitch, Because the magnetic pole pitch of the generated harmonic magnetic field is large (about half the magnetic pole pitch of the superconducting magnet) and the amount thereof is large, large pulsations in the opposite direction along the vertical direction of the two adjacent magnetic poles of the superconducting coil on the car. Force is generated, and a vertical bending moment is generated in the entire superconducting coil on the vehicle, and at the same time, a vertical moment is generated between the magnetic pole at the end and the magnetic pole at the center. Therefore, large pitching occurs in the linear motor car. In particular, in a superconducting coil on a vehicle in which the magnetic pole pitch at the front end and the rear end is smaller than the magnetic pole pitch at the center, the pulsating power caused by the harmonic magnetic field is increased between the magnetic poles at both ends and the magnetic pole at the center. Therefore, the pitching is remarkably generated.

  The present invention has been made to solve the above-described problem, and even when the levitation coil and the propulsion coil are arranged at a pitch of 120 degrees, the magnetic levitation propulsion system and the magnetic levitation propulsion system can suppress the pitching to a small extent. The purpose is to provide a magnetically levitated railway using

  The invention according to claim 1 is a levitation coil and a propulsion coil disposed along a predetermined movement path, and is opposed to the levitation coil and the propulsion coil and receives a levitation force from the levitation coil, and the propulsion coil And a magnetic field that moves along the moving path by receiving a propulsive force from the magnetic field, and the field magnet has an even number of magnetic poles along the moving direction, and the magnetomotive force at the front end and rear end magnetic poles The present invention relates to a magnetic levitation propulsion system characterized in that the magnetomotive force is smaller than the magnetomotive force in the magnetic pole of the magnetic field.

  Due to the harmonic magnetic field generated by the levitation coil, vertical pulsating power is generated in each magnetic pole constituting the field. And since the magnetic poles located at the front end and the rear end are larger in distance from the center point of the field than the magnetic pole located at the center, if the pulse power acting on each magnetic pole is the same, the magnetic poles at the front end and the rear end In the magnetic pole positioned, a larger moment is generated around the central point than in the magnetic pole positioned in the center.

  However, in the magnetic levitation propulsion system, the magnetomotive force at the front and rear magnetic poles is smaller than the magnetomotive force at the central magnetic pole, so the magnitude of the pulse power generated by the harmonic magnetic field from the levitation coil is The rear end magnetic pole is smaller than the central magnetic pole.

  Accordingly, it is possible to prevent a large moment from being generated around the center point of the field at the magnetic poles at the front end and the rear end, so that field pitching can be suppressed.

  Here, in the case of using a superconducting coil or a normal conducting coil as a field, as a method for reducing the magnetomotive force, there is a method for reducing the number of turns of the superconducting coil or the normal conducting coil to reduce the magnetomotive force of these coils. It is done.

  Further, if a permanent magnet is used as the field, the magnetization may be weakened.

  According to a second aspect of the present invention, a levitating coil and a propulsion coil disposed in a vertical plane along a predetermined movement path, and a vertical plane opposed to the levitating coil and the propulsion coil, the levitating coil A magnetic field that receives a levitation force from the coil and moves along the movement path by receiving a propulsion force from the propulsion coil, and the field has an even number of magnetic poles along the movement direction, and a front end portion Further, the present invention relates to a magnetic levitation propulsion system characterized in that the rear end magnetic pole is disposed at a position higher than the central magnetic pole.

  In the magnetic levitation propulsion system, when the field moves relative to the levitation coil, if there is a deviation of the center position between the field and the levitation coil, the electromagnetic force in a direction to eliminate the deviation. Is generated in the field. The larger the displacement of the center position, the greater the electromagnetic force generated in the field.

  In the magnetic levitation propulsion system according to the second aspect, the levitation coil, the propulsion coil, and the field are all provided in the vertical plane. In the field, the magnetic poles at the front end and the rear end are arranged at a position higher than the magnetic pole at the center.

  Therefore, the magnetic poles at the front end and the rear end are opposed to the levitation coil, and the central point of the magnetic pole at the center is shifted downward from the vertical center point of the levitation coil.

  Therefore, the magnetic force generated in the magnetic poles at the front and rear ends is smaller than that in the central part. Since the magnitude of the pulse power in the magnetic field at the front and rear ends is smaller than the pulse power of the magnetic pole for the center, the moment around the center point of the field is also small.

  Therefore, it is possible to suppress vertical pitching caused by the moment.

  The invention according to claim 3 is a levitation coil and a propulsion coil disposed along a predetermined movement path, and is opposed to the levitation coil and the propulsion coil and receives a levitation force from the levitation coil. And a magnetic field that moves along the moving path by receiving a propulsive force from the magnetic field, and the field magnet has an even number of magnetic poles along the moving direction, and the magnetic poles of the front end portion and the rear end portion are in the center portion. The present invention relates to a magnetic levitation propulsion system characterized in that the magnetic levitation propulsion system is arranged such that the distance from the levitation coil is larger than that of the magnetic pole.

  In the magnetic levitation propulsion system, the distance between the magnetic poles of the front and rear end magnetic poles and the levitation coil is set larger than the distance between the magnetic poles of the central magnetic pole and the levitation coil. The magnetic force acting on the magnetic pole of the portion is made weaker than the magnetic force acting on the magnetic pole of the central portion. This suppresses the generation of the pitching moment.

  According to a fourth aspect of the present invention, a levitation coil and a propulsion coil disposed along a predetermined movement path, and the levitation coil and the propulsion coil are opposed to the levitation coil and receive a levitation force from the levitation coil. And a magnetic field that moves along the moving path by receiving a propulsive force from the magnetic field, and the field magnet has an even number of magnetic poles along the moving direction, and the magnetic poles of the front end portion and the rear end portion are in the center portion. The present invention relates to a magnetic levitation propulsion system characterized in that a dimension along a direction orthogonal to the moving direction is smaller than that of the magnetic pole.

  In the magnetic levitation propulsion system, the magnetic force generated by the magnetic poles at the front end portion and the rear end portion is smaller than that at the central portion because the magnetic field from the levitation coil is smaller than that at the central portion. Therefore, generation of a pitching moment is suppressed.

  According to a fifth aspect of the present invention, the levitation coil and the propulsion coil disposed along a predetermined movement path, the levitation coil and the propulsion coil are opposed to the levitation coil, and the levitation force is received from the levitation coil. A magnetic field that moves along the moving path by receiving a propulsive force from the magnetic field, and the field has an even number of magnetic poles along the moving direction, and a magnetic pole pitch between the front end magnetic pole and the rear end magnetic pole Is set substantially equal to an integral multiple of the wavelength of the harmonic magnetic field generated in the ground coil.

  In the magnetic levitation system, the magnetic forces generated in the two magnetic poles at the front end and the rear end are substantially the same in magnitude but opposite in direction, so that they cancel each other. As a result, it is possible to prevent a large vertical or horizontal translational pulse power from being generated in the field due to the harmonic magnetic field. On the other hand, the pulse power of the pitching moment as described above is generated. Therefore, in order to reduce the pulsating power of the pitching moment as much as possible without increasing the vertical and horizontal pulsations, the dimensions may be slightly shifted by an integral multiple of the magnetic pole pitch.

  Here, the magnetic pole pitch between the magnetic pole at the front end and the magnetic pole at the rear end is preferably in the range of ± 20% of the length of an integral multiple of the wavelength of the harmonic magnetic field generated in the ground coil, and more preferably in the range of ± 10%. A range of ± 5% is particularly preferable.

  The invention according to claim 6 relates to the magnetic levitation propulsion system according to claim 5, wherein the magnetomotive force in the magnetic poles at the front end portion and the rear end portion is smaller than the magnetomotive force in the magnetic pole at the center portion.

  In the magnetic levitation propulsion system, as described in the fifth aspect, the magnetic forces generated in the two magnetic poles of the front end portion and the rear end portion cancel each other, but a moment remains. However, as described in the first aspect, since the magnetic force generated by the magnetic poles located at both ends is smaller than the magnetic force generated by the magnetic pole at the center, generation of a pitching moment is also suppressed.

  The invention according to claim 7 relates to the magnetic levitation propulsion system according to claim 6, wherein the magnetic poles at the front end portion and the rear end portion are disposed at a position higher than the magnetic pole at the center portion.

  In the magnetic levitation propulsion system, the magnetic poles located at the front end and the rear end have not only a smaller magnetomotive force than the magnetic poles at the center, but also have a higher installation position and a lower magnetic force from the levitation coil.

  Therefore, the occurrence of pitching pulsation can be particularly effectively suppressed.

  The invention according to claim 8 relates to the magnetic levitation propulsion system according to any one of claims 1 to 7, wherein the levitation coils are arranged at a pitch of 120 degrees.

  In the magnetic levitation propulsion system, for the reasons described in claims 1 to 7, pitching pulsation hardly occurs even though the levitation coils are arranged at a pitch of 120 degrees.

  Further, since the number of levitation coils can be halved as compared with the conventional magnetic levitation propulsion system in which the levitation coils are arranged at a pitch of 60 degrees, the economy is high.

  The invention according to claim 9 relates to the magnetic levitation propulsion system according to any one of claims 1 to 8, wherein the field is a superconducting magnet.

  In the magnetic levitation propulsion system, a high flying height of about 10 cm can be obtained. Further, it is not necessary to detect and control the flying height with a gap sensor or the like.

  A tenth aspect of the present invention relates to the magnetic levitation propulsion system according to any one of the first to eighth aspects, wherein the field is a normal conducting magnet.

  The magnetic levitation system is a superconducting magnet replaced with a normal conducting magnet. A high flying height cannot be obtained, but it is easy to handle.

  The invention of claim 11 relates to the magnetic levitation propulsion system according to any one of claims 1 to 8, wherein the field is a permanent magnet.

  The magnetic levitation propulsion system is obtained by replacing a superconducting magnet with a permanent magnet, and a high flying height cannot be obtained, but it is easy to handle.

  Therefore, a simple magnetic levitation propulsion system having a very configuration can be configured.

  A levitation propulsion system according to any one of claims 1 to 11, wherein a magnetic field in the levitation propulsion system is provided on a vehicle. About.

  In the magnetically levitated railway, pulsating power is prevented from being generated in the field provided in the bogie part of the vehicle, so that the pitching pulsation of the vehicle can be effectively suppressed.

  A thirteenth aspect of the present invention relates to the magnetically levitated railway according to the twelfth aspect, wherein the magnetic poles of the field magnets are superconducting coils.

  In the magnetic levitation railway, since the field is a superconducting coil, the magnetic levitation coil receives a large magnetic force from the levitation coil and travels to a height of about 10 cm from the track surface. Therefore, stable levitation can be achieved without particularly controlling the buoyancy from the levitation coil.

  As described above, according to the present invention, the magnetic levitation propulsion system and the magnetic levitation propulsion system that can keep the pitching small even when the levitation coil and the propulsion coil are arranged at a pitch of 120 degrees. A floating railway is provided.

1. Embodiment 1
Hereinafter, an example of a magnetic levitation propulsion system according to the present invention and a magnetic levitation railway using the magnetic levitation propulsion system will be described.

  The magnetically levitated railway according to the first embodiment includes a U-shaped guide way 1002 and a linear motor car 1000 that travels on the guide way 1002 as shown in FIG.

  The linear motor car 1000 has a connecting structure in which one carriage 100 is disposed between two adjacent vehicle bodies 102 as shown in FIG.

  A cabin 104 is provided inside the vehicle body 102 as shown in FIG. 2, and a through passage 106 is provided between two adjacent cabins 104. The carriage 100 is provided below the through passage 106.

  As shown in FIGS. 3 to 5, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil are disposed on both side edges of the carriage 100 from the front to the rear along the traveling direction a of the linear motor car 1000. 8 is disposed. Superconducting coil 2 and superconducting coil 6 each form an N-pole magnetic pole, and superconducting coil 4 and superconducting coil 8 each form an S-pole magnetic pole. The superconducting coil 2 and the superconducting coil 4 constitute one set of magnetic poles, and the superconducting coil 6 and the superconducting coil 8 constitute another set of magnetic poles.

  On the other hand, as shown in FIGS. 3, 4 (A), and FIG. 5, levitation coils 10 are arranged on the inner surface of the side wall of the guideway 1002 at regular intervals. A propulsion coil is also arranged between the inner surface of the side wall of the guideway 1002 and the levitation coil 10, but the propulsion coil is omitted. The levitation coils 10 are arranged at a pitch of 120, in other words, three each for one set of magnetic poles composed of the superconducting coil 2 and the superconducting coil 4 or the superconducting coil 6 and the superconducting coil 8. FIG. 4B shows an example in which six levitation coils 10 are arranged at a pitch of 60 degrees, in other words, six for each set of magnetic poles. The levitation coil 10 is formed in a figure 8 shape. The superconducting coil 2, superconducting coil 4, superconducting coil 6, superconducting coil 8, levitation coil 10, and propulsion coil constitute the magnetic levitation propulsion system according to the first embodiment. The superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 constitute a magnetic field in the magnetic levitation propulsion system.

  As shown in FIGS. 3 to 5, the superconducting coil 2 and the superconducting coil 8 positioned at the front end and the rear end along the traveling direction a are in the front-rear direction compared to the superconducting coil 4 and the superconducting coil 6 positioned at the center. The dimensions have been reduced. Specifically, in the superconducting coil 4 and the superconducting coil 6, the length × height is 1250 mm × 500 mm, whereas in the superconducting coil 2 and the superconducting coil 8, the length × height is 950 mm × 500 mm. is there. The pitch of the levitation coil is 900 mm and the harmonic magnetic field wavelength is 1350 mm.

As shown in FIG. 6, the magnetic pole pitch L between the superconducting coil 2 and the superconducting coil 8 is substantially equal to an integral multiple of the wavelength W _L of the harmonic magnetic field generated in the levitation coil 10. Here, "substantially equal" means that the pole pitch L is in integer multiples ± 20% of the range of the wavelength W _L.

Specifically, the magnetic pole pitch is set to 1500 mm between the superconducting coil 4 and the superconducting coil 6, whereas it is set to 4200 mm between the superconducting coil 2 and the superconducting coil 8. Here, since the wavelength W _L of the harmonic magnetic field is 1350 mm, the magnetic pole pitch between the superconducting coil 2 and the superconducting coil 8 is three times ± 4% of the wavelength W _L of the harmonic magnetic field.

  Furthermore, the superconducting coil 2 and the superconducting coil 8 have a smaller number of windings than the superconducting coil 4 and the superconducting coil 6, and therefore have a small magnetomotive force. For example, the superconducting coil 4 and the superconducting coil 6 have a magnetomotive force of 850 kA, whereas the superconducting coil 2 and the superconducting coil 8 have a magnetomotive force as low as 650 kA.

  In the magnetically levitated railway in the first embodiment, the linear motor car 1000 is in the direction of arrow a by the electromagnetic force generated by the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 receiving the magnetic field from the propulsion coil. Proceed to. Thereby, the magnetic fields from the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 cross the levitation coil 10, and a current flows through the levitation coil 10 by electromagnetic induction. Here, since the levitation coil 10 is formed in an 8-shape, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 have a linkage magnetic field between the upper part and the lower part of the levitation coil 10. Electromagnetic force in the same direction acts. As a result, the linear motor car 1000 rises.

  Here, when the linear motor car 1000 travels, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 pass through the vicinity, thereby generating a harmonic magnetic field from the levitation coil 10, and this harmonic magnetic field causes the FIG. As shown by the arrows in FIG. 2, force is generated in the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8. This force is opposite in direction between two adjacent superconducting coils.

Here, the magnetic pole pitch L between the superconducting coil 2 and the superconducting coil 8, because it is close to 3 times the wavelength W _L harmonic magnetic field, the force in the superconducting coils of the front and rear ends Are equal in size. Therefore, the forces almost cancel each other between the two superconducting coils at the front end and the rear end.

  However, as shown in FIG. 11, a rotational moment M <b> 1 and a rotational moment M <b> 2 whose directions are opposite to each other are generated around the center point of the carriage 100 by the force. Here, since the distance from the superconducting coil 2 and the superconducting coil 8 to the central point is larger than the distance from the superconducting coil 4 and the superconducting coil 6 to the central point, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting If the forces acting on the coil 8 are all the same, the rotational moment M2 generated in the superconducting coil 2 and the superconducting coil 8 remains without being completely canceled out by the rotational moment M1 generated by the superconducting coil 4 and the superconducting coil 6. To do. As a result, a pitching moment is generated and the carriage 100 is pitched.

  Here, in the magnetic levitation propulsion system of the first embodiment, the superconducting coil 2 and the superconducting coil 8 located at the front end and the rear end as described above are compared with the superconducting coil 4 and the superconducting coil 6 located at the center. Since the magnetomotive force is weak, the force generated by the harmonic magnetic field flowing in the levitation coil 10 is weaker in the superconducting coil 2 and the superconducting coil 8 than in the superconducting coil 4 and the superconducting coil 6, as shown in FIG. Accordingly, the rotational moment M2 generated by the superconducting coil 2 and the superconducting coil 8 is also smaller than when the same force is generated in all the superconducting coils, so that the rotational moment M1 generated by the superconducting coil 4 and the superconducting coil 6 is canceled out. The remaining pitching moment is also reduced.

  Thereby, since the pitching motion of the carriage 100 is reduced, the pitching pulsation of the linear motor car 1000 is also reduced.

  In the magnetic levitation propulsion system and the magnetic levitation railway according to the first embodiment, the pitching moment generated in the carriage 100 by the levitation coil 10, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 as described above. Is small and, in some cases, almost zero, the pitching pulsation generated in the linear motor car 1000 is small even though the levitation coils 10 are arranged at a pitch of 120 degrees.

Moreover, since the number of the levitation coils 10 can be halved as compared with a conventional magnetic levitation railway in which the levitation coils 10 are arranged at a pitch of 60 degrees, the economy is high.
2. Embodiment 2
In the magnetic levitation propulsion system of the first embodiment, instead of making the magnetomotive force of the superconducting coil 2 and the superconducting coil 8 smaller than that of the superconducting coil 4 and the superconducting coil 6, the superconducting coil 4 and the superconducting coil 6 An example of arrangement at a position lower than the superconducting coil 8 is shown in FIG.

  As described above, since the levitation coil 10 is formed in a figure eight shape, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 are linked at the upper and lower portions of the levitation coil 10. An electromagnetic force in the direction in which the magnetic fields are equal, in other words, a force in a direction in which the center of the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 and the center of the levitation coil 10 are aligned. 8A, the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the case where the deviation d between the center of the superconducting coil 8 and the center of the levitation coil 10 is larger in FIG. As shown in (B), a greater force acts than when the deviation d between the center of the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8 and the center of the levitation coil 10 is small.

  Therefore, when a harmonic magnetic field is generated in the levitation coil 10, a greater force is generated in the superconducting coil 4 and the superconducting coil 6 than in the superconducting coil 2 and the superconducting coil 8, as shown in FIG. 11.

Therefore, the rotational moment M2 is smaller than the case where forces of equal magnitude are generated in the superconducting coil 2, the superconducting coil 4, the superconducting coil 6, and the superconducting coil 8, and therefore the rotational moment M2 is canceled by the rotational moment M1. The remaining pitching moment is also reduced.
3. Embodiment 3
In the magnetic levitation propulsion system of the first embodiment, FIG. 9 shows an example in which the magnetomotive force of the superconducting coil 2 and the superconducting coil 8 is made smaller than that of the superconducting coil 4 and the superconducting coil 6 in the vertical direction. .

  If the superconducting coil has a small vertical dimension, the area through which the magnetic field generated by the levitation coil 10 passes also decreases, so that the force generated by the harmonic magnetic field flowing through the levitation coil 10 also decreases.

Therefore, the force generated by the harmonic magnetic field is smaller in the superconducting coil 2 and the superconducting coil 8 than in the superconducting coil 4 and the superconducting coil 6, and for the same reason as described in the first and second embodiments. The pitching moment generated in the cart can be reduced.
4). Embodiment 4
In the magnetic levitation propulsion system of the first embodiment, instead of making the magnetomotive force of the superconducting coil 2 and the superconducting coil 8 smaller than that of the superconducting coil 4 and the superconducting coil 6, the superconducting coil 2 and the superconducting coil 8 are replaced with the superconducting coil 4 and the superconducting coil. An example in which the coil 6 is disposed on the side of the carriage 100 from the coil 6 is shown in FIG.

  In the superconducting coil 2 and the superconducting coil 8, the distance D between the superconducting coil and the levitation coil 10 is larger than that in the superconducting coil 4 and the superconducting coil 6, so that the force generated by the harmonic magnetic field flowing through the levitation coil 10 is also reduced.

  Therefore, the force generated by the harmonic magnetic field is smaller in the superconducting coil 2 and the superconducting coil 8 than in the superconducting coil 4 and the superconducting coil 6, and for the same reason as described in the first and second embodiments. The pitching moment generated in the cart can be reduced.

  The magnetic levitation propulsion system of the present invention is used for various conveying devices, machine tool feeding devices, linear motor elevators and the like in addition to magnetic levitation railways.

FIG. 1 is a schematic diagram illustrating a configuration of a magnetically levitated railway according to the first embodiment. FIG. 2 is a schematic diagram illustrating an internal configuration of the linear motor car that constitutes the magnetically levitated railway according to the first embodiment. FIG. 3 is a perspective view showing a relative arrangement of the superconducting coil and the levitation coil in the magnetic levitation propulsion system provided in the magnetic levitation railway according to the first embodiment. FIG. 4 is a plan view showing a relative arrangement of the superconducting coil and the levitation coil. FIG. 5 is a side view showing a relative arrangement of the superconducting coil and the levitation coil. FIG. 6 is a perspective view showing a relative positional relationship between a carriage provided in the linear motor car shown in FIG. 2 and a superconducting coil incorporated in the carriage. FIG. 7 is a side view showing a relative arrangement of the superconducting coil and the levitation coil in the magnetic levitation propulsion system according to the second embodiment. FIG. 8 is an explanatory diagram showing the relationship between the magnitude d of the center deviation between the superconducting coil and the levitation coil and the force acting on the superconducting coil. FIG. 9 is a side view showing a relative arrangement of the superconducting coil and the levitation coil in the magnetic levitation propulsion system according to the third embodiment. FIG. 10 is a side view showing a relative arrangement of the superconducting coil and the levitation coil in the magnetic levitation propulsion system according to the fourth embodiment. FIG. 11 is an explanatory diagram of the force and rotational moment acting on the superconducting coil by the harmonic magnetic field generated by the levitation coil in the conventional magnetic levitation propulsion system. FIG. 12 is an explanatory diagram of forces and rotational moments acting on the superconducting coil by the harmonic magnetic field generated by the levitation coil in the magnetic levitation propulsion system of the first to fourth embodiments.

Explanation of symbols

2 Superconducting Coil 4 Superconducting Coil 6 Superconducting Coil 8 Superconducting Coil 10 Levitation Coil 100 Car 102 Car Body 104 Guest Room 106 Passage 1000 Linear Motor Car 1002 Guide Way

Claims (13)

A levitation coil and a propulsion coil disposed along a predetermined movement path, the levitation coil and the propulsion coil, the levitation force received from the levitation coil, and the propulsion force received from the propulsion coil. And a field moving along
The magnetic field levitation propulsion system, wherein the field has an even number of magnetic poles along the moving direction, and the magnetomotive force at the front and rear magnetic poles is smaller than the magnetomotive force at the central magnetic pole. A levitation coil and a propulsion coil disposed in a vertical plane along a predetermined movement path, a levitation coil disposed in a vertical plane opposite to the levitation coil and the propulsion coil, receiving a levitating force from the levitation coil, and the propulsion A magnetic field that receives a driving force from the coil and moves along the moving path,
The field magnet has an even number of magnetic poles along the moving direction, and the magnetic levitation propulsion system in which the magnetic poles at the front end and the rear end are arranged at a position higher than the magnetic pole at the center. . A levitation coil and a propulsion coil disposed along a predetermined movement path, the levitation coil and the propulsion coil, the levitation force received from the levitation coil, and the propulsion force received from the propulsion coil. And a field moving along
The field has an even number of magnetic poles along the moving direction, and the magnetic poles at the front end and the rear end are arranged such that the distance from the levitation coil is greater than the magnetic pole at the center. Magnetic levitation propulsion system characterized by A levitation coil and a propulsion coil disposed along a predetermined movement path, the levitation coil and the propulsion coil, the levitation force received from the levitation coil, and the propulsion force received from the propulsion coil. And a field moving along
The field has an even number of magnetic poles along the moving direction, and the front end and rear end magnetic poles are smaller in dimension along the direction perpendicular to the moving direction than the central magnetic pole. Magnetic levitation propulsion system. A levitation coil and a propulsion coil disposed along a predetermined movement path, the levitation coil and the propulsion coil, the levitation force received from the levitation coil, and the propulsion force received from the propulsion coil. And a field moving along
The field has an even number of magnetic poles along the moving direction, and the magnetic pole pitch between the front end magnetic pole and the rear end magnetic pole is substantially equal to an integral multiple of the wavelength of the harmonic magnetic field generated in the ground coil. A magnetic levitation propulsion system characterized by being set.   6. The magnetic levitation propulsion system according to claim 5, wherein the magnetomotive force at the front end and rear end magnetic poles is smaller than the magnetomotive force at the central magnetic pole.   The magnetic levitation propulsion system according to claim 6, wherein the magnetic poles at the front end and the rear end are disposed at a position higher than the magnetic pole at the center.   The magnetic levitation propulsion system according to any one of claims 1 to 7, wherein the levitation coils are arranged at a pitch of 120 degrees.   The magnetic levitation propulsion system according to claim 1, wherein the field is a superconducting magnet.   The magnetic levitation propulsion system according to claim 1, wherein the field is a normal conducting magnet.   The magnetic levitation propulsion system according to claim 1, wherein the field is a permanent magnet.   A magnetic levitation railway comprising the magnetic levitation propulsion system according to any one of claims 1 to 11, wherein a field in the magnetic levitation propulsion system is provided on a vehicle.   The magnetic levitation railway according to claim 12, wherein the magnetic pole of the field is a superconducting coil.

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