JPH01206802A - Superconducting magnetic levitation transportation system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transportation system that uses superconducting magnets to run a vehicle body in a suspended state due to magnetic repulsion.

[Conventional technology]

Conventionally, it has been common to use trolleys, forklifts, and manned or automated guided vehicles to transport objects within factories, for example. Among these, trolleys are used to carry relatively lightweight items by hand, forklifts are engine-powered or battery-powered, and transport vehicles have battery-powered traveling mechanisms.

In addition, some high-speed conveyance systems in factories utilize linear motors. A linear motor consists of a stator that is arranged linearly on a flat surface, and running elements, which correspond to the rotor of a general motor, arranged parallel to the vehicle body at a predetermined interval. Alternatively, the vehicle body is levitated by air pressure and propelled by magnetic attraction and repulsion between the stator and the running element.

Magnetic levitation railways (maglev trains) are widely known as transportation systems that utilize linear motors. This magnetic levitation railway uses magnetic force to levitate the car body.There are two types of levitation methods: an attraction type and an induced repulsion type.The suction type uses the attraction force of magnets on the track side and the car body side to levitate the car body. In addition, the induced repulsion type is
As shown in Figure 4, when the car body (a) is run at high speed along the track (c), the magnetic flux of the superconducting magnet (b) fixed to the car body (a) is transferred onto the track (c). By crossing a fixed levitation ground coil (d), said coil (d)
An induced current flows through the superconducting magnet (b), and a magnetic field having the same polarity and opposite to the superconducting magnet (b) is generated to levitate the vehicle body (a).

As shown in FIG. 5, the propulsion force is generated by AC power converted by a cycloconverter (not shown) into a propulsion ground coil (e) fixed on the orbit (C) separately from the levitation ground coil (d). This is obtained by always applying an attractive force to the front of the vehicle body (a) and a repulsive force to the rear of the vehicle body (a).

[Problem to be solved by the invention]

However, among the conventional transportation systems mentioned above, trolleys, forklifts, and transport vehicles have slow transport speeds, engine-type systems have problems with exhaust gas and noise, and para-chill type systems consume large amounts of electricity and take a long time to charge. It will take a while.

In addition, transportation systems that use linear motors require tracks, so they have a low degree of freedom and can only travel along the tracks, and it is difficult to change the tracks when changing the layout of a factory.

Furthermore, when magnetically levitating a car body, there are difficulties in ensuring stability and maintaining a gap between the floor and the car body above a certain level.

[Means to solve the problem]

In order to solve the problems mentioned above, the superconducting magnetic levitation transportation system according to the present invention installs a large number of ground magnets made of permanent magnets or electromagnets on the road or floor surface, and has a required number of superconducting coils on the vehicle body. A control device is installed to control the current value of each of the aVV conductive coils constituting the on-board magnet based on an output signal from an on-board magnet and a sensor that detects the inclination of the vehicle body. The vehicle body is horizontally floated and supported by the repulsive force between the same poles, and the vehicle body is provided with auxiliary wheels driven by another actuator mechanism.

[For production]

According to the system of the present invention, the vehicle body starts and stops using the auxiliary wheels that have landed on the ground, and when traveling in a straight line, the vehicle body uses ground magnets made of permanent magnets or electromagnets, and on-vehicle magnets that generate strong magnetic force using superconducting coils. The vehicle body is levitated by the magnetic repulsion between the two, the tilt of the vehicle body is detected by a sensor, and the current flowing to each superconducting coil is controlled by a control device based on the detection signal output from the sensor, that is, the vehicle body is always kept horizontal. The magnetic force of each on-vehicle magnet is changed so that the vehicle slides due to the inertia obtained by driving the auxiliary wheels at the time of starting.

The levitation and landing of the vehicle body is also performed by controlling the current to the Mi conductive coil.

〔Example〕

The invention will now be described with reference to illustrated embodiments.

In Figures 1 and 2, (1) is a vehicle body, and (2) is an on-vehicle magnet mounted and fixed at a total of three locations in the front center and rear both sides of the vehicle body (1). . The on-board magnet (2) is an air-core superconducting coil (2) made of superconducting material.
a), and a cryostat (2b) for maintaining the superconducting coil (2a) at a low temperature below a certain level. (3) is a water tube type level sensor installed near each on-board magnet (2), and (4) is a water tube type level sensor (not shown) based on data from each water tube type level sensor (3). This control device constitutes a feedback control system that changes the current value from the in-vehicle power source to each of the superconducting coils (2a). (5) is an auxiliary wheel installed at the bottom of the vehicle body (1).
It is driven by an actuator (not shown) such as a motor. (e) is a ground magnet made of an electromagnet or a permanent magnet, which is laid flat on the road or floor within the factory.

Propulsive force when the vehicle body (1) starts is obtained by landing the auxiliary wheels (5) on the ground and driving the auxiliary wheels (5). Then, the superconducting coil (2a) of each on-board magnet (2)
by supplying current to the on-board magnet (2) and the ground magnet (6).
) by generating a magnetic repulsion force between the same magnetic poles (N pole and N pole in Figure 1), and increasing the current value to the superconducting coil (2a) to make the magnetic repulsion force stronger. , the vehicle body rises as if an airplane is taking off, and due to the inertia obtained by driving the auxiliary wheels (5),
Run smoothly.

When floating, the vehicle body (1) is connected to the ground magnet (6) and each on-vehicle magnet (2).
), but the vehicle body (1) may tilt due to unbalance of the load (W) loaded on the vehicle or poor construction accuracy of the road or floor surface. This may cause the load to collapse or cause abnormal running. Therefore, the inclination of the vehicle body (1) is detected by the water level sensors (3) located at three locations on the vehicle, and the control device (4) is controlled based on the output data from each sensor (3). By changing the current value to each superconducting coil (2a), in other words, controlling the magnetic force of each on-board magnet (2), the car body (1) is always kept horizontal and the height from the road or floor is kept constant. That's what I do. In principle, propulsion force is not required during levitation, but an auxiliary propulsion bag such as a propeller or jet propulsion may be provided to compensate for speed reduction due to air resistance.
Alternatively, the ground magnet (6) may be a TL electromagnet, and the direction of the magnetic poles of each type of magnet may be changed to perform propulsion and steering using the principle of a linear motor.

When stopping the vehicle or stopping in an emergency, use B1.
By lowering the current value to the u i =I wheel (2a), the vehicle body (1) is lowered and the auxiliary wheels (5
) to stop. Steering can also be performed by landing the auxiliary wheels (5) on the ground.

Note that when multiple vehicle bodies run on a road or floor surface, there is a risk that the vehicle bodies will collide with each other. Therefore, as shown in Figure 3, if electromagnets (7) are provided on each of the front, rear, left, and right sides of the vehicle body (1), the electromagnets (7a) on the side surfaces of one vehicle body (1) and the electromagnets (7a) on the other vehicle body TrL magnet on the side of (1) (
Collision can be prevented by the magnetic repulsion of 7b). Further, a plurality of car bodies can be connected by the magnetic attraction force between different polarities of the electromagnet (7C) on the front side of the car body (1) and the electromagnet (7d) on the rear side of another car body (1).

〔Effect of the invention〕

As explained above, the superconducting magnetic levitation transportation system of the present invention levitates the vehicle body by using the magnetic repulsion between the on-vehicle magnet and the ground magnet, and uses the inertia obtained by driving the auxiliary wheels at the time of starting. Superconducting coils are used for the on-board magnets, allowing large magnetically levitated blades to be obtained with low power consumption.Since the car runs without contact with the road or floor, it does not generate noise and does not touch the floor. There is no wear on surfaces, etc. Therefore, it can be used, for example, as a means of transportation within a clean room. In addition, since it does not run along a track, it has a high degree of freedom of movement and there is no friction with the ground, so it is possible to run at high speed by installing an auxiliary propulsion device such as a propeller or jet propulsion, and it reduces vibration. Because the amount of vibration is small, there is no negative impact of vibration on passengers or cargo.
Since the vehicle body is always held horizontally during floating travel, it is possible to provide an excellent transportation system that prevents cargo from collapsing.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of the present invention, FIG. 2 is a schematic plan view, FIG. 3 is an explanatory diagram showing when multiple vehicle bodies are running, and FIG. 4 is a conventional example. FIG. 5 is an explanatory diagram showing the levitation principle of the magnetic levitation railway, and FIG. 5 is an explanatory diagram also showing the running principle. (+) Vehicle body (2) On-board magnet (2a) Superconducting coil (3) Water tube type level sensor (4) Control device (5
) Auxiliary wheel (6) Ground magnet (7) Electromagnet Patent applicant Agent: Fujita Kogyo Co., Ltd. Patent attorney Yo Nomoto −:ni′” −, −r

Claims (1)

[Claims] 1. A large number of ground magnets made of permanent magnets or electromagnets are laid on the road or floor surface, and the required number of on-board magnets having superconducting coils on the car body and output signals from sensors that detect the inclination of the car body are used to A control device is installed to control the current value to each of the superconducting coils constituting the on-board magnet, and the car body is horizontally levitated and supported by the repulsive force between the same poles of the above-mentioned ground magnet and the on-board magnet. A superconducting magnetic levitation transportation system, characterized in that it has auxiliary wheels driven by another actuator mechanism.