DE2115267A1 - Permanent magnet arrangement, in particular for high-speed traffic systems, for supporting vehicles on a track-like guide - Google Patents

Description

FRIED. KRUPP GESELLSCHAFT WITH LIMITED LIABILITY IN ESSEN

Permanent magnet arrangement, in particular for high-speed traffic systems, for support of vehicles on a track-like guide

The present invention relates to a dating network arrangement, especially for express traffic systems, to support vehicles on a track-like guide due to magnetic repulsive forces.

Such dating magnet arrangements are intended to Development of track-bound traffic systems enable speeds up to 500 km / h allow with little drive power. With a given payload and a given floating height of the vehicle above the guide, there is in particular both a low permanent magnet volume in the vehicle, as well as in the guidance: with a given payload, it should be safe Support of the vehicle required repulsive force are kept as small as possible; the costs the associated roadway should be economically justifiable.

In British patent specification 867 045 is already describes a transport system equipped with permanent magnets. Vehicle and associated track contain several parallel rows of magnets of alternating polarity arranged in the longitudinal direction.

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The magnetic poles in the track and vehicle are opposite, separated by an air gap same name »

In such a permanent magnet arrangement, the Dauermagaetmaterial does have a favorable Arbeitspunlctj between ungleichnamigen magnetic poles at the track and the vehicle, however, are great attractions of effective «This try the vehicle in such a manner against aem associated track to move that jexieils xingleichnamige magnetic poles face each other. Since in such a. If the repulsive force required to support the vehicle would disappear, special measures must be taken to prevent the vehicle from moving sideways.

The disadvantage of large side forces is avoided by the technical teaching contained in British patent specification 1035-6k

The vehicle and the associated track contain only two parallel ones each arranged in the longitudinal direction Rows of permanent magnets of the same polarity. The opposing magnetic pales are in turn same name.

This permanent magnet arrangement has the disadvantage that Large amounts of magnetic material in the two rows of magnets must be accommodated to provide the repulsive force required to operate the vehicle to create.

Both of the aforementioned permanent magnet arrangements have a »magnetic yoke, i. h »the

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Rows of permanent magnets in the track and vehicle are open the side facing the air gap each arranged on a plate made of weiclimagnetischera material. This is intended in particular to protect the vehicle against those emanating from the permanent magnets shield from interfering magnetic fields.

The invention is based on the object, the amount of permanent magnet material in the track and in the vehicle to reduce that is required to raise a given payload to a certain height.

According to the invention, this object is achieved in that in the vehicle and in the associated equilibrium Guide arranged in the longitudinal direction more than two parallel permanent magnets iihen the same polarity are, .leren opposite one another, through a working air gap between the vehicle and the guide separate magnetic poles are of the same name.

It is particularly advantageous if the arranged in the vehicle and in the track-like guide Permanent magnets applied to the working air gap Side do not have a back yoke made of magnetically soft material.

Magnet arrangements in which the individual permanent magnets are embedded in non-magnetic material, generate greater repulsive forces than versions with magnetic yoke.

It is also expedient for the permanent magnets to be made of an oxidic or intermetallic material produce, whose large coercive force due to a - high crystal anisotropy energy is.

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In the drawing is an embodiment of the Subject matter of the invention is a cross section through a vehicle lower part and the associated track-like Leadership shown.

The vehicle 1 with the width B floats with it a certain distance - this corresponds to the working air gap - above the guide 2 with the Width B. In both parts 1, 2 five rows of permanent magnets are arranged parallel to one another. The permanent magnets 3 in the vehicle have a width b. and a height h and are at intervals a embedded in non-magnetic material 5, which has cavities in places for reasons of weight saving may contain.

The permanent magnets k in the guide with the dimensions b _o , h are also arranged in non-magnetic material 6 _{at intervals a o.}

All rows of magnets in the vehicle and in the guide have the same polarity. The permanent magnets preferably consist of an anisotropic, coercive force-reinforced barium or strontium ferrite variety or from permanent magnet material based on rare earths and cobalt.

The number of rows of magnets, the dimensions of the permanent magnets and the size of the magnet spacing depend on the required hovering height and the payload to be transported. A greater floating height requires in particular fewer rows of magnets and larger magnet widths. A larger maximum payload Above all, a greater height of the magnets in the guide is required.

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Although the repulsive force generally also decreases as the magnet volume decreases, the permissible decreases Payload increases with a suitable choice of all of the above parameters, since the magnet volume also increases 5. Weight of the vehicle magnets is reduced.

With a constant magnet volume, the subdivision into several rows of magnets mainly causes a decrease the magnetic depth effect, which is advantageous for two reasons:

The floating height of the vehicle is less dependent on the size of the payload to be transported. In addition, the magnetic fields caused by the permanent magnets, which are disruptive in the vehicle make noticeable, considerably weakened. Therefore, in such a permanent magnet arrangement the soft magnetic yoke that reduces the repulsive force can be dispensed with, which in the vehicle serves primarily as a magnetic field shield.

The advantages achieved by the invention are in particular that the amount of magnetic material and the previously required soft magnetic material is completely saved. This will sink the cost of the roadway and the vehicles so that a support of lane-bound means of transport becomes economically feasible for the first time using permanent magnets.

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Claims (2)

Claims 1 · / Permanent magnet arrangement, especially for high-speed traffic systems, for support of vehicles on a track-like Guidance based on magnetic repulsive forces, characterized in that in the vehicle (l) urir in the track-like guide (2) in the longitudinal direction more than two parallel rows of permanent magnets (3 or 4) of the same polarity are arranged, their opposite, through a working air gap between the vehicle and guidance separate magnetic poles are of the same name. 2. Permanent magnet arrangement according to claim 1, characterized in that the in the vehicle (l) and in the track-like guide (2) arranged permanent magnets (3 or 4) on the Working air gap facing away from the side no inference from soft magnetic material exhibit. 3 «permanent magnet arrangement according to claim 1 and / or 2, characterized in that the permanent magnets (3, 4) consist of an oxidic or intermetallic material whose large coercive force is due to a high crystal anisotropy energy. 209842/0027