JPH05316609A - Levitation propulsion guide system for magnetic levitation train - Google Patents

Abstract

PURPOSE:To reduce a current flowing to a levitation propulsion guide coil and to decrease a necessary conductor amount at the time of manufacturing the coil by dividing the coil into two layers, and deviating the layers of the coil in an advancing direction to be disposed. CONSTITUTION:First layer levitation propulsion guide coils 5b, 5d or 5e, 5g and second layer levitation propulsion guide coils 5a, 5c or 5f are provided on the ground, and deviated from each other in an advancing direction to be disposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a levitation propulsion guide system for a magnetic levitation railway which travels at high speed by utilizing magnetic levitation repulsive force.

[0002]

2. Description of the Related Art As described in Japanese Patent Application Laid-Open No. 1-298902, a levitation propulsion guide system for a magnetic levitation train using a superconducting magnet has an eight-character shape and has a difference in magnetic flux that is vertically linked. In the coil that obtains the levitation force, the guide force is obtained by connecting the coils on both sides of the track, and the thrust is obtained by passing the current from the power supply through the feeder wire.
A system has been proposed in which one coil also serves as a levitation propulsion guide.

The detailed principle of levitation is that, as shown in FIG. 10, the vertical center line 8 of the superconducting coil 2a is more than the center line 7 of the levitation propulsion guide coil 5a connected in an 8-shape.
The vehicle weight is sinking by ΔZ. Therefore, as the superconducting coil 2a moves, an induced current that is directly proportional to the difference between the time change of the magnetic flux interlinking the upper part of the levitation propulsion guide coil 5a and the time change of the magnetic flux interlinking the lower part of the levitation propulsion guide coil 5a is generated. It flows through the coils 5a and 5b. Levitation is performed by utilizing the repulsive magnetic flux generated by this induced current.

As for the guide, as shown in FIG. 11, the levitation propulsion guide coils 5a and 5e on both sides of the track are connected to the connecting wires 6a and 6b.
It can be done by connecting with. Further propulsion can be performed by connecting the power source 4 to the connection lines 6a and 6b and flowing a current as indicated by an arrow in the figure.

Further, in order to reduce the amplitude of the pulsating magnetic flux of the ground coil and prevent the quenching (superconducting breakdown) of the superconducting coil, it has been considered to form the levitation coil into two layers.
It is described in Linear Drive Research Society material LD-91-100.

[0006]

In the first prior art described above, the levitation propulsion guide coil remains a single layer, which is very easy to mount on a ground guideway. However, the magnitude of the current for levitation or propulsion flowing in the levitation propulsion guide coil, which in turn determines the amount of conductor needed to make the ground coil, is not taken into account. When a magnetic levitation train runs, eddy currents flow in the wires of the ground coil, and this acts as a braking force for the train, so reducing the amount of conductors used in the ground coil is a very important issue. .. Furthermore, since the number of coils laid on the ground is extremely large, reducing the amount of conductors used leads to a significant reduction in coils.

Furthermore, in the case of the one-layer arrangement, there is a limit to the reduction of the pulsation of the propulsive force from the ground coil, which affects the superconducting magnet and causes the quench in the worst case.

In the second prior art, the levitation coil has two layers, and when combined with at least one layer of propulsion coil, at least three layers are arranged. Since the ground coil needs to support the weight of the train, if the number of layers is large, it will require a great deal of effort for actual installation. Moreover, since the levitation coil and the propulsion coil are manufactured separately, the amount of conductors used increases dramatically.

It is a main object of the present invention to provide a levitation propulsion guide system which can reduce the current flowing in the ground coil and, in turn, can reduce the amount of conductors required when manufacturing the levitation propulsion guide coil.

Another object of the present invention is to provide a levitation propulsion guide system having a levitation propulsion guide coil arrangement for reducing the pulsation of the propulsion force.

Another object of the present invention is to provide a levitation propulsion guide system in which levitation propulsion guide coils are connected so that forces in the left and right directions of a train are always balanced.

Another object of the present invention is a levitation propulsion guide capable of reducing fluctuation magnetic flux components by making the strengths of the magnetic fields at the superconducting coil positions produced by the levitation propulsion guide coils of the first and second layers equal. To provide a system.

Another object of the present invention is to provide a levitation propulsion guide system by arranging the levitation propulsion guide coils which can make the magnetic field strengths at the superconducting coil positions equal, which are created by adjacent levitation propulsion guide coils. ..

Another object of the present invention is to provide a coil shape which allows a floating structure guide coil to be easily installed in a guideway.

Still another object of the present invention is to provide the shape of the buoyant propulsion guide coils located at both ends of one block in which several or dozens of levitation propulsion guide coils are gathered.

[0016]

According to the present invention, there is provided a levitation propulsion guidance system for a magnetic levitation train in which levitation propulsion guide coils are arranged in two layers and the first layer and the second layer are displaced in the traveling direction. Provided.

Further, according to the present invention, there is provided a levitation propulsion guidance system for a magnetic levitation train, characterized in that when the levitation propulsion guide coils on both sides of the vehicle are connected, the inside and outside are connected to each other.

Further, according to the present invention, there is provided a levitation propulsion guidance system for a magnetic levitation train in which the magnetomotive force of the second layer levitation propulsion guide coil is made larger than the magnetomotive force of the first layer levitation propulsion guide coil.

Further, according to the present invention, there is provided a levitation propulsion guiding system for a magnetic levitation train, in which two layers of levitation propulsion guiding coils are obliquely overlapped with each other.

Further, according to the present invention, there is provided a levitation propulsion guide coil shape for a magnetic levitation train, which is manufactured by making the overlapping portions of adjacent levitation propulsion guide coils parallel to the track and the other portions oblique.

Further, according to the present invention, when several or dozens of levitation propulsion guide coils are made into one block, the lengths of the levitation propulsion guide coils at both ends thereof in the traveling direction are changed to other levitation propulsion guide coils. Provided is a levitation propulsion guidance system for a magnetic levitation train, which has a levitation propulsion guide coil shape smaller than the length of the guide coil in the traveling direction.

[0022]

[Function] The length of the levitation propulsion guide coil in the traveling direction is increased,
Since the arrangement is made in two layers, the horizontal side of the coil becomes longer, the current required for levitation is reduced, and the total current is reduced even when combined with the current for propulsion, and the amount of conductor for coil production is reduced. Diminished.

Since the levitation propulsion guide coils are formed in two layers and are arranged so as to be offset from each other in the traveling direction, the amplitude of the harmonics is reduced, and therefore the pulsation of the propulsion force is reduced and the ratio of affecting the superconducting coil is reduced.

When connecting the levitation propulsion guide coils on both sides of the vehicle, since the vehicle sides and the outer sides were connected, the forces in the left and right directions were symmetrical.

The magnetomotive force of the levitation propulsion guide coil of the second layer is
Since the magnetomotive force of the levitation propulsion guide coil of the first layer was made larger, the magnitude of the magnetic field at the superconducting coil position created by the levitation propulsion guide coil of the second layer far from the superconducting coil became the same as that of the first layer.

Since the two layers of the levitation propulsion guide coils are arranged obliquely to each other, the influences from the adjacent levitation propulsion guide coils are equalized, and the influence on the superconducting coil is uniform. The overlapping part of the adjacent levitation propulsion guide coils is parallel to the track, and the other parts are slanted, which facilitates installation on the guideway.

When several blocks or dozens of levitation propulsion guide coils are combined into one block, the lengths of the levitation propulsion guide coils on both sides of the levitation propulsion guide coil are determined from the lengths of the other levitation propulsion guide coils. Since it was made smaller, the block shape remained rectangular, which facilitated the production.

[0028]

The present invention will be described below based on the illustrated embodiments. FIG. 1 shows an embodiment of the present invention. In this embodiment, first, the 8-shaped coils 5a, 5b, 5c, 5d, 5 are placed on the ground.
e, 5f, 5g, 5h are installed. The coils 5a and 5e located symmetrically with respect to the vehicle are connected by the guide cables 6a and 6b, so that a guiding force is generated when the vehicle is laterally displaced. This guide cable 6a,
6b is further connected to the AC power supply 4, and the vehicle can be propelled by passing three-phase currents. Of the levitation propulsion guide coils, 5b, 5d or 5e, 5g is the first layer, and 5a, 5c or 5f, 5h is the second layer,
They are arranged so as to be offset in the traveling direction. In this way, by making the levitation propulsion guide coil long in the traveling direction and arranging the levitation propulsion guide coil in two layers, it is possible to reduce the amount of conductors required for manufacturing the levitation propulsion guide coil.

FIG. 2 shows an arrangement of the levitation propulsion guide coil in one layer, and FIG. 3 shows an arrangement of coils in the case of two layers. In this embodiment, L11, L12, L13, L14, L15, L2
1, L22, L23, L24 and L25,
0.34m, 0.35m, 0.45m, 0.185m, 0.04
m, 0.34 m, 0.55 m, 0.45 m, 0.195 m and 0.04 m. A sinusoidal current was applied to these coils for levitation and propulsion, and the current values required to obtain a levitation force of 26 kN and a progressing force of 5 kN per superconducting coil were calculated. As a result, the current value flowing in the ground coil is 1
The combined current of levitation and propulsion is 20.0kA in the case of the two-layer arrangement and 1 in the two-layer arrangement as shown in FIG.
At this time, when the ground coil becomes 4.4 kA, the amount of conductor required to manufacture the coil is

[0030]

[Equation 1]

That is, it decreases 0.93 times.

Further, in this case, the magnetic field at the position of the superconducting magnet generated by the ground coil becomes smooth. Therefore, the thrust pulsation is about 23% in the one-layer arrangement, but it is considerably small in the two-layer arrangement, about 8%.

FIG. 6 shows another embodiment of the present invention. In this embodiment, 5 of the outer side of the levitation propulsion guide coils on both sides of the vehicle are used.
a, 5e or inner 5b, 5f is a guide cable 6
a, 6b, 6c, and 6d are connected, so that the forces in the left and right directions are equalized. Further, by making the current flowing through 5a and 5e larger than the current flowing through 5b and 5f, the influence on the superconducting magnet was made equal.

FIG. 7 shows another embodiment of the present invention. In this embodiment, the levitation propulsion guide coils 5a, 5b, 5 are divided into two layers.
c and 5d are obliquely weighted with each other, whereby the influences from the first and second layers are equalized, and the influence of harmonics on the superconducting coil is uniform.

FIG. 8 shows another embodiment of the present invention. In this embodiment, the overlapping portions of the levitation propulsion guide coils 5a, 5b, 5c, and 5d are manufactured in parallel with the track, and the other portions are formed obliquely. Actual installation became easier.

FIG. 9 shows another embodiment of the present invention. In the present embodiment, when several blocks of levitation propulsion guide coils or dozens of coils are made into one block, the levitation coils 5 at both ends thereof are arranged.
The lengths of i and 5j in the traveling direction are set to other levitation coils 5
The length is smaller than the length in the traveling direction of a, 5b, 5c, 5d, 5k, 5l, 5m, and 5n, which makes the shape of the block rectangular and facilitates the manufacture of the block.

[0037]

According to the present invention, the following effects can be expected.

(1) It is possible to reduce the amount of conductor required when manufacturing the levitation propulsion guide coil. (2) About 23
% To about 8%.

(3) The strength of the magnetic field generated by the adjacent levitation propulsion guide coils at the superconducting coil positions can be made equal.

(4) It can be easily installed on the guideway of the levitation propulsion guide coil.

(5) The production can be facilitated in one block in which several or dozens of levitation coils are assembled.

[Brief description of drawings]

FIG. 1 is a perspective view of a ground coil which is an embodiment of a coil arrangement of a levitation propulsion guidance system for a superconducting magnetic levitation train of the present invention.

FIG. 2 is an explanatory diagram of a one-layer arrangement according to the present invention.

FIG. 3 is an explanatory view of a two-layer arrangement according to the invention.

FIG. 4 is an explanatory diagram of a current flowing through an upper portion and a lower portion of a ground coil in the case of a one-layer arrangement, based on a calculation result of how much the conductor amount can be reduced by the present invention.

FIG. 5 is an explanatory diagram of a current flowing through an upper part and a lower part of a ground coil in the case of a two-layer arrangement based on a calculation result of how much the conductor amount can be reduced by the present invention.

FIG. 6 is an explanatory view of a method of connecting a guide cable in another embodiment of the present invention.

FIG. 7 is another embodiment of the present invention in which the levitation coils are arranged so as to be diagonally overlapped.

FIG. 8 is an explanatory diagram of another embodiment of the present invention in which, when the levitation coils are arranged so as to be diagonally overlapped with each other, the overlapping portions are made parallel to the traveling direction and the other portions are made obliquely.

FIG. 9 is an explanatory view of another embodiment of the present invention in which the size of the levitation coil existing at both ends of the block is changed.

FIG. 10 is an explanatory diagram of a levitation principle of a conventional magnetic levitation train.

FIG. 11 is an explanatory view of the principle of propulsion and guidance.

[Explanation of symbols]

1 ... vehicle body, 2 ... superconducting coil, 3 ... guideway, 4 ...
Propulsion power source, 5a, 5b, 5c, 5d ... Levitation propulsion guide coil.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koji Kobayashi 4026 Kuji Town, Hitachi City, Hitachi City, Ibaraki Prefecture Hitate Manufacturing Co., Ltd. (72) Noriaki Hino 4026 Kuji Town, Hitachi City, Hitachi City Ibaraki Prefecture Inside Hitachi Research Laboratory (72) Teruhiro Takizawa, Inventor Teruhiro 1-1, Sachimachi, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Factory (72) Inventor Shizuo Tsujimoto 1-1, Sachimachi, Hitachi City, Ibaraki Hitachi Works Hitachi Factory

Claims (6)

[Claims] 1. A vehicle in which superconducting coils are arranged at predetermined intervals on both side surfaces along a vehicle traveling direction to levitate and guide along a track path. The levitation propulsion guide coil in which a conductor coil and a lower conductor coil are arranged in opposition to each other so as to face each other and a pair of coils are opposed to each other, and they are null-flux-connected through a connecting wire, In a combined levitation propulsion guide apparatus for a magnetic levitation railway, in which a large number are arranged at predetermined intervals along the traveling direction, and a propulsion excitation power source is connected to the levitation propulsion guide coil, the levitation propulsion guide coil is divided into two layers, and 1 The levitation propulsion guide coil of the second layer is arranged on the vehicle side, and the levitation propulsion guide coil of the second layer is arranged on the back side thereof, and the levitation propulsion guide coils are arranged in the traveling direction so as to be displaced from each other in the traveling direction. Propulsion guidance system. 2. The levitation propulsion guidance system for a magnetic levitation train according to claim 1, wherein the levitation propulsion guide coils on both sides of the vehicle are connected to each other inside and outside. 3. The levitation propulsion guidance system for a magnetic levitation train according to claim 1, wherein the magnetomotive force of the second layer levitation propulsion guide coil is larger than the magnetomotive force of the first layer levitation propulsion guide coil. 4. The levitation propulsion guide system for a magnetic levitation train according to claim 1, wherein two layers of the levitation propulsion guide coils are obliquely overlapped with each other. 5. The levitation propulsion guide coil for a magnetic levitation train according to claim 4, wherein the overlapping portions of the adjacent levitation propulsion guide coils are manufactured in parallel with the track and the other portions are inclined. 6. The length in the traveling direction of the levitation propulsion guide coil at the both ends of the one block, wherein a group of several levitation propulsion guide coils or several tens of tens are combined into one block. The levitation propulsion guidance system for a magnetic levitation train, in which the length is smaller than the length of the other levitation propulsion guide coils in the traveling direction.