EP0478973A1 - Magnetsystem - Google Patents

Magnetsystem Download PDF

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Publication number
EP0478973A1
EP0478973A1 EP91114902A EP91114902A EP0478973A1 EP 0478973 A1 EP0478973 A1 EP 0478973A1 EP 91114902 A EP91114902 A EP 91114902A EP 91114902 A EP91114902 A EP 91114902A EP 0478973 A1 EP0478973 A1 EP 0478973A1
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EP
European Patent Office
Prior art keywords
magnetic
blocks
magnet
magnet system
magnetic blocks
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91114902A
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German (de)
French (fr)
Inventor
Karl Heinz Dr. Unkelbach
Hans Dieter Dr. Wasmuth
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Publication of EP0478973A1 publication Critical patent/EP0478973A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
    • H01F7/0284—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles using a trimmable or adjustable magnetic circuit, e.g. for a symmetric dipole or quadrupole magnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/14—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets

Definitions

  • the invention relates to a magnet system, in particular a magnetic separator, with homogeneously magnetized, circularly arranged magnetic blocks, the magnetization directions of which are oriented differently from one another and defined according to a predetermined mathematical formula.
  • the object of the invention is to further improve or simplify this magnet system, in particular with regard to the manufacture and composition.
  • the magnetic blocks are regularly polygonal to circular in cross section.
  • all magnetic blocks can be uniformly pressed, sintered and magnetized during manufacture with one and the same magnetization oriented perpendicular to their axis, which in comparison to the previously known, trapezoidal shaped magnetic blocks, of which each individual block already exists must be provided with a special magnetization direction which differs from the other blocks during production, a considerable simplification in production is achieved.
  • the magnetic blocks are all one and the same type and can therefore be interchanged with each other as required.
  • the magnet system consists of magnetic blocks (1) which are circular in cross section and which are arranged in a circular manner at a distance (R) with respect to the axis (A) of a drum magnetic separator.
  • the magnetization directions (arrows X) of the magnetic blocks (1) are oriented differently from one another and are determined according to a predetermined mathematical formula and fixed on a base body (G).
  • the circular cross section of the magnetic blocks (1) according to the invention has the particular advantage that they can all be made uniformly with respect to their magnetization direction, and that when these magnetic blocks are assembled into a magnetic system, the magnetic blocks only have to be rotated about their axis in such a way that their magnetization directions (arrows X) correspond to the predetermined mathematical formula.
  • the magnetic blocks (1) in their magnetization direction (arrow X) according to the math matical formula o i - n4) i aligned.
  • the magnetic blocks (4, 5) are arranged in two rows one behind the other. In this way, a corresponding increase in the magnetic field strength is very advantageously achieved.
  • the magnetic blocks (4 and 5) are also arranged here, and their directions of magnetization are aligned so that an outward-directed magnetic field is generated.
  • By turning the magnetic blocks (4 and 5), in such a way that their direction of magnetization corresponds to the mathematical formula ⁇ i + n ⁇ i, an inward-directed magnetic field can also be easily built up.
  • Such magnetic systems with an inward magnetic field are used in tomographs, storage rings etc., while magnetic systems with an outward magnetic field are mainly used in magnetic separators, in particular drum magnetic separators.
  • the advantage of this magnet system is the more compact design and the higher magnetic field strength.
  • the magnet systems shown in the drawing figures 1 to 3 are sectoral arrangements of homogeneously magnetized magnet blocks, as are used in particular in drum magnetic separators.
  • n 3.33, that is, not an integer.
  • the magnetic blocks designed according to the invention can also extend over an entire circumference, in which case n must be an integer.
  • a magnetic system with magnetic blocks arranged in a completely circular ring and with an outward-directed magnetic field is used in particular in the case of tape magnetic cutters, while a magnet system with fully circular-shaped magnetic blocks and an inwardly directed magnetic field is used in tomographs, storage rings, etc.
  • the magnetic blocks with the same advantages in cross-section can also have the shape of a regular polygon and, if required, be arranged in series in more than two circular rows and designed with an outward and / or inward magnetic field.
  • the object of the invention is therefore not limited to the magnet systems shown in the exemplary embodiments.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

In a known magnet system, especially for magnetic separators, having homogeneously magnetised magnet blocks, arranged in a circular ring, the magnetisation directions of the magnet blocks are aligned differently from one another and are defined in accordance with a predetermined mathematical formula. In consequence, a magnetic field is generated which runs uniformly over the entire region of the magnet system. However, in this case, the magnet blocks are constructed to have a trapezoidal cross-section and require special production because of the different magnetisation directions. The manufacture and assembly of these magnet blocks is thus relatively complicated and costly. However, according to the invention, the manufacture and assembly of the magnet blocks to form a magnet system is quite considerably simplified in that the magnet blocks (1) are constructed to have a cross-section which is between a regular quadrilateral and a circle. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Magnetsystem, insbesondere Magnetscheider, mit homogen magnetisierten, kreisringförmig angeordneten Magnetblöcken, deren Magnetisierungsrichtungen untereinander unterschiedlich ausgerichtet und nach einer vorbestimmten mathematischen Formel festgelegt sind.The invention relates to a magnet system, in particular a magnetic separator, with homogeneously magnetized, circularly arranged magnetic blocks, the magnetization directions of which are oriented differently from one another and defined according to a predetermined mathematical formula.

Aus der deutschen Offenlegungsschrift 36 37 200 ist eine Magnetblockanordnung mit nach außen gerichtetem Magnetfeld bekannt, wobei die Magnetisierungsrichtungen der kreisringförmig angeordneten Magnetblöcke untereinander unterschiedlich ausgerichtet und nach der mathematischen Formel oi = - nφi festgelegt sind. Die Magnetblöcke sind hierbei im Querschnitt trapezförmig ausgebildet, und es muß daher beim Zusammenbau dieser Magnetblöcke darauf geachtet werden, daß die Magnetisierungsrichtung der einzelnen Magnetblöcke jeweils dem nach dieser Formel errechneten Ergebnis entspricht. Durch diese bekannte Ausbildung und Anordnung dieser Magnetblöcke wird eine unter der jeweils erforderlichen Pohlzahl optimale Feldstärkeverteilung im Außenbereich der Magnetblöcke erreicht.From German published patent application 36 37 200, a magnetic block arrangement with an outwardly directed magnetic field is known, the directions of magnetization of the circularly arranged magnetic blocks being oriented differently from one another and being determined according to the mathematical formula o i = - nφi. The magnetic blocks are trapezoidal in cross-section, and it must therefore be ensured when assembling these magnetic blocks that the direction of magnetization of the individual magnetic blocks corresponds in each case to the result calculated using this formula. This known design and arrangement of these magnetic blocks achieves an optimal field strength distribution in the outer region of the magnetic blocks under the required number of Pohls.

Ausgehend von diesem bekannten Magnetsystem besteht die Aufgabe der Erfindung in einer weitergehenden Verbesserung bzw. Vereinfachung dieses Magnetsystems, insbesondere hinsichtlich der Fertigung und der Zusammensetzung.Starting from this known magnet system, the object of the invention is to further improve or simplify this magnet system, in particular with regard to the manufacture and composition.

Diese Aufgabe wird dadurch gelöst, daß die Magnetblöcke im Querschnitt regelmäßig vieleckig bis kreisrund ausgebildet sind. Durch diese Ausbildung der Magnetblöcke können bei der Herstellung alle Magnetblöcke einheitlich mit ein und derselben, zu ihrer Achse senkrecht gerichteten Magnetisierung gepreßt, gesintert und magnetisiert werden, wodurch im Vergleich zu den bisher bekannten, im Querschnitt trapezförmig ausgebildeten Magnetblöcken, von denen jeder einzelne Block bereits bei der Herstellung mit einer besonderen, von den übrigen Blöcken abweichenden Magnetisierungsrichtung versehen werden muß, eine erhebliche Vereinfachung in der Herstellung erreicht wird. Auch der Zusammenbau der erfindungsgemäß ausgebildeten Magnetblöcke zu einem Magnetsystem wird dadurch ganz wesentlich erleichtert, da die Magnetblöcke beim Zusammenbau in ihrer Lage um ihre Achse nur so verdreht werden müssen, daß ihre Magnetisierungsrichtung die Richtung der mathematischen Formel Oi = ± nφi entspricht. In dieser Lage werden sie dann auf einen Grundkörper fixiert. Die Magnetblöcke stellen alle einen und denselben Typ dar und können daher beim Zusammenbau auch untereinander beliebig vertauscht werden.This object is achieved in that the magnetic blocks are regularly polygonal to circular in cross section. Through this design of the magnetic blocks, all magnetic blocks can be uniformly pressed, sintered and magnetized during manufacture with one and the same magnetization oriented perpendicular to their axis, which in comparison to the previously known, trapezoidal shaped magnetic blocks, of which each individual block already exists must be provided with a special magnetization direction which differs from the other blocks during production, a considerable simplification in production is achieved. The assembly of the magnetic blocks designed according to the invention into a magnet system is also made considerably easier, since the magnetic blocks during assembly only have to be rotated about their axis in such a way that their direction of magnetization corresponds to the direction of the mathematical formula O i = ± nφi. In this position, they are then fixed on a base body. The magnetic blocks are all one and the same type and can therefore be interchanged with each other as required.

Für den Fall, daß das Magnetsystem ein nach außen gerichtetes Magnetfeld aufweisen soll, werden die Magnetblöcke beim Aufbau des Magnetsystems in ihrer Magnetisierungsrichtung nach der mathematischen Formel Oi = - nφi ausgerichtet, während bei einem Magnetsystem mit nach innen gerichtetem Magnetfeld beim Aufbau des Magnetsystems die Magnetblöcke in ihrer Magnetisierungsrichtung nach der mathematischen Formel ψi = + nφi ausgerichtet werden.In the event that the magnet system should have an outwardly directed magnetic field, the magnet blocks are aligned in the direction of magnetization when the magnet system is set up in accordance with the mathematical formula O i = - nφi, while in the case of a magnet system with an inwardly directed magnetic field, the set up of the magnet system Magnetic blocks are aligned in their magnetization direction according to the mathematical formula ψi = + nφi.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung werden nachfolgend anhand von in Zeichnungsfiguren schematisch dargestellten Ausführungsbeispielen näher erläutert.Further details, features and advantages of the invention are explained in more detail below on the basis of exemplary embodiments schematically illustrated in the drawing figures.

Es zeigt:

  • Fig. 1 eine sektorale Anordnung eines Magnetsystems mit sechs im Querschnitt kreisrund ausgebildeten Magnetblökken;
  • Fig. 2 eine sektorale Anordnung eines Magnetsystems mit zwei in Reihen radial hintereinander angeordneten, im Querschnitt kreisrund ausgebildeten Magnetblöcken;
  • Fig. 3 eine sektorale Anordnung eines Magnetsystems mit zwei in Reihen hintereinander versetzt gegeneinander angeordneten Magnetblöcken gemäß der Erfindung.
It shows:
  • 1 shows a sectoral arrangement of a magnet system with six magnet blocks of circular cross section;
  • 2 shows a sectoral arrangement of a magnet system with two magnet blocks arranged radially one behind the other in rows and of circular cross-section.
  • 3 shows a sectoral arrangement of a magnet system with two magnet blocks arranged one behind the other in rows, according to the invention.

Wie Fig. 1 zeigt, besteht das Magnetsystem aus im Querschnitt kreisrund ausgebildeten Magnetblöcken (1), die bezogen auf die Achse (A) eines Trommelmagnetscheiders in einem Abstand (R) kreisringförmig angeordnet sind. Die Magnetisierungsrichtungen (Pfeile X) der Magnetblöcke (1) sind untereinander unterschiedlich ausgerichtet und nach einer vorbestimmten mathematischen Formel festgelegt und auf einem Grundkörper (G) fixiert. So bildet die Magnetisierungsrichtung des i-ten Magnetblokkes (1) mit der Winkel-O-Lage (a) den Winkel oi = - nφi, wobei n eine positive Zahl und φi der Winkel ist, der durch die senkrechte Verbindungslinie (2) des Schwerpunktes des i-ten Magnetblockes (wobei i eine Laufzahl ist) mit der Rotationsachse der Trommel des Magnetscheiders und durch einen beliebig vorbestimmten festgelegten Radiusvektor gebildet wird, und wobei ψi im selben Drehsinn von der gleichen Winkel-O-Lage (a) ausgehend wie φi zu zählen ist.As shown in FIG. 1, the magnet system consists of magnetic blocks (1) which are circular in cross section and which are arranged in a circular manner at a distance (R) with respect to the axis (A) of a drum magnetic separator. The magnetization directions (arrows X) of the magnetic blocks (1) are oriented differently from one another and are determined according to a predetermined mathematical formula and fixed on a base body (G). The direction of magnetization of the i-th magnetic block (1) with the angle-o-position (a) forms the angle o i = - nφi, where n is a positive number and φi is the angle defined by the vertical connecting line (2) of the Center of gravity of the i-th magnetic block (where i is a running number) is formed with the axis of rotation of the drum of the magnetic separator and by an arbitrarily predetermined fixed radius vector, and where ψi in the same direction of rotation starting from the same angle-o-position (a) as φi is to be counted.

Die im Querschnitt kreisrunde Ausbildung der Magnetblöcke (1) gemäß der Erfindung hat den besonderen Vorteil, daß sie bezüglich ihrer Magnetisierungsrichtung alle einheitlich gefertigt werden können, und daß beim Zusammenbau dieser Magnetblöcke zu einem Magnetsystem die Magnetblöcke lediglich um ihre Achse so gedreht werden müssen, daß ihre Magnetisierungsrichtungen (Pfeile X) der vorbestimmten mathematischen Formel entsprechen. Bei dem in Fig. 1 dargestellten Magnetsystem sind die Magnetblöcke (1) in ihrer Magnetisierungsrichtung (Pfeil X) nach der mathematischen Formel oi = - n4)i ausgerichtet. Durch die Ausrichtung der Magnetblöcke (1) nach dieser Formel wird ein nur nach außen gerichtetes, über den ganzen Bereich des Magnetsystems gleichmäßig verlaufendes Magnetfeld aufgebaut. Für den Fall, daß jedoch bei diesem Magnetsystem ein nach innen gerichtetes, gleichmäßig verlaufendes Magnetfeld aufgebaut werden soll, brauchen lediglich die Magnetblöcke (1) in ihrer Magnetisierungsrichtung (Pfeil 3) nach der mathematischen Formel φi = + nφi, ausgerichtet werden, was durch einfaches Verdrehen der Magnetblöcke sehr leicht bewerkstelligt werden kann.The circular cross section of the magnetic blocks (1) according to the invention has the particular advantage that they can all be made uniformly with respect to their magnetization direction, and that when these magnetic blocks are assembled into a magnetic system, the magnetic blocks only have to be rotated about their axis in such a way that their magnetization directions (arrows X) correspond to the predetermined mathematical formula. In the magnet system shown in Fig. 1, the magnetic blocks (1) in their magnetization direction (arrow X) according to the math matical formula o i = - n4) i aligned. By aligning the magnetic blocks (1) according to this formula, a magnetic field that is only directed outward and runs uniformly over the entire area of the magnet system is built up. In the event that an inwardly directed, evenly extending magnetic field is to be built up in this magnet system, only the magnetic blocks (1) need to be aligned in their magnetization direction (arrow 3) according to the mathematical formula φi = + nφi, which is done by simple means Twisting the magnetic blocks can be done very easily.

Bei dem in Fig. 2 dargestellten Magnetsystem sind die Magnetblöcke (4, 5) in zwei Reihen hintereinander angeordnet. Hierdurch wird sehr vorteilhaft eine entsprechende Erhöhung der Magnetfeldstärke erreicht. Die Magnetblöcke (4 und 5) sind auch hierbei so angeordnet, und ihre Magnetisierungsrichtungen untereinander sind so ausgerichtet, daß dadurch ein nach außen gerichtetes Magnetfeld erzeugt wird. Durch Verdrehen der Magnetblöcke (4 und 5), und zwar derart, daß ihre Magnetisierungsrichtung der mathematischen Formel ψi = + nφi entspricht, kann in einfacher Weise auch hierbei sehr leicht ein nach innen gerichtetes Magnetfeld aufgebaut werden. Solche Magnetsysteme mit nach innen gerichtetem Magnetfeld werden bei Tomographen, Speicherringen etc. eingesetzt, während Magnetsysteme mit nach außen gerichtetem Magnetfeld vorwiegend bei Magnetscheidern, insbesondere Trommelmagnetscheidern, zur Anwendung kommen.In the magnet system shown in Fig. 2, the magnetic blocks (4, 5) are arranged in two rows one behind the other. In this way, a corresponding increase in the magnetic field strength is very advantageously achieved. The magnetic blocks (4 and 5) are also arranged here, and their directions of magnetization are aligned so that an outward-directed magnetic field is generated. By turning the magnetic blocks (4 and 5), in such a way that their direction of magnetization corresponds to the mathematical formula ψi = + nφi, an inward-directed magnetic field can also be easily built up. Such magnetic systems with an inward magnetic field are used in tomographs, storage rings etc., while magnetic systems with an outward magnetic field are mainly used in magnetic separators, in particular drum magnetic separators.

Bei dem in Fig. 3 dargestelltem Magnetsystem sind die Magnetblöcke (6 und 7) zwar ebenfalls wie bei dem Magnetsytem gemäß Fig. 2 in zwei Reihen hintereinander angeordnet, jedoch mit dem Unterschied, daß die Magnetblöcke (7) der innere Reihe gegenüber der äußeren Reihe der Magnetblöcke (6) in die dazwischen befindlichen Lücken hinein versetzt und ihre Magnetisierungsrichtungen untereinander nicht wie bei dem in Fig. 2 dargestellten Magnetsystem parallel zueinander verlaufend, sondern jeweils nach der mathematischen Formel ψi = ± nφi verlaufend ausgerichtet sind. Der Vorteil dieses Magnetsystems besteht in der kompakteren Bauweise und der höheren Magnetfeldstärke.In the magnet system shown in FIG. 3, the magnetic blocks (6 and 7) are arranged in two rows one behind the other as in the magnetic system according to FIG. 2, but with the difference that the magnetic blocks (7) of the inner row are opposite the outer row the magnetic blocks (6) are displaced into the gaps between them and their directions of magnetization do not run parallel to one another as in the magnet system shown in FIG. 2, but rather are aligned according to the mathematical formula ψi = ± nφi. The advantage of this magnet system is the more compact design and the higher magnetic field strength.

Bei den in den Zeichnungsfiguren 1 bis 3 dargestellten Magnetsytemen handelt es sich um sektoriale Anordnungen von homogen magnetisierten Magnetblöcken, wie sie insbesondere bei Trommelmagnetscheidern zum Einsatz kommen. Bei diesen in den Zeichnungsfiguren dargestellten Magnetsystemen ist n = 3,33, also nicht ganzzahlig. Jedoch können sich die erfindungsgemäß ausgebildeten Magnetblöcke auch über einen ganzen Kreisumfang erstrecken, wobei dann n ganzzahlig sein muß. Ein Magnetsystem mit vollkreisringförmig angeordneten Magnetblöcken und mit nach außen gerichtetem Magnetfeld kommt insbesondere bei Bandmagnetscheidern zur Anwendung, während ein Magnetsystem mit vollkreisringförmig angeordneten Magnetblöcken und nach innen gerichtetem Magnetfeld bei Tomographen, Speicherringen etc. zum Einsatz kommt. Darüber hinaus können die Magnetblöcke mit ebendenselben Vorteilen im Querschnitt auch die Form eines regelmäßigen Vieleckes aufweisen, und je nach Bedarf in mehr als zwei kreisringförmigen Reihen hintereinander angeordnet und mit nach außen und/oder nach innen gerichtetem Magnetfeld ausgelegt sein. Der Gegenstand der Erfindung ist daher nicht auf die in den Ausführungsbeispielen dargestellten Magnetsysteme beschränkt.The magnet systems shown in the drawing figures 1 to 3 are sectoral arrangements of homogeneously magnetized magnet blocks, as are used in particular in drum magnetic separators. In these magnet systems shown in the drawing figures, n = 3.33, that is, not an integer. However, the magnetic blocks designed according to the invention can also extend over an entire circumference, in which case n must be an integer. A magnetic system with magnetic blocks arranged in a completely circular ring and with an outward-directed magnetic field is used in particular in the case of tape magnetic cutters, while a magnet system with fully circular-shaped magnetic blocks and an inwardly directed magnetic field is used in tomographs, storage rings, etc. In addition, the magnetic blocks with the same advantages in cross-section can also have the shape of a regular polygon and, if required, be arranged in series in more than two circular rows and designed with an outward and / or inward magnetic field. The object of the invention is therefore not limited to the magnet systems shown in the exemplary embodiments.

Claims (4)

1. Magnetsystem, insbesondere für Magnetscheider, mit homogen magnetisierten, kreisringförmig angeordneten Magnetblöcken, deren Magnetisierungsrichtungen untereinander unterschiedlich ausgerichtet und nach einer vorbestimmten mathematischen Formel festgelegt sind, dadurch gekennzeichnet, daß die Magnetblöcke (1, 4, 5, 6, 7) im Querschnitt regelmäßig vieleckig bis kreisrund ausgebildet sind.1. Magnet system, in particular for magnetic separators, with homogeneously magnetized, circularly arranged magnetic blocks, the directions of magnetization of which are oriented differently from one another and are defined according to a predetermined mathematical formula, characterized in that the magnetic blocks (1, 4, 5, 6, 7) have a regular cross section are polygonal to circular. 2. Magnetsystem nach Anspruch 1, dadurch gekennzeichnet, daß die Magnetblöcke (1, 4, 5, 6, 7) in ihrer Magnetisierungsrichtung (X) nach der mathematischen Formel ψi = - n4)i ausgerichtet sind.2. Magnet system according to claim 1, characterized in that the magnetic blocks (1, 4, 5, 6, 7) in their magnetization direction (X) according to the mathematical formula ψi = - n4) i are aligned. 3. Matnetsystem nach Anspruch 1, dadurch gekennzeichnet, daß die Magnetblöcke in ihrer Magnetisierungsrichtung (3) nach der mathematischen Formel ψi = + nφi ausgerichtet sind.3. Matnetsystem according to claim 1, characterized in that the magnetic blocks are aligned in their magnetization direction (3) according to the mathematical formula ψi = + nφi. 4. Magnetsystem nach Anspruch 1, 2, oder 3, dadurch gekennzeichnet, daß die Magnetblökke (4, 5, 6, 7) in zwei oder mehreren kreisringförmigen Reihen hintereinander angeordnet sind.4. Magnet system according to claim 1, 2 or 3, characterized in that the magnetic blocks (4, 5, 6, 7) are arranged one behind the other in two or more annular rows.
EP91114902A 1990-09-29 1991-09-04 Magnetsystem Withdrawn EP0478973A1 (en)

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Application Number Priority Date Filing Date Title
DE4030886 1990-09-29
DE4030886 1990-09-29
DE4032616 1990-10-15
DE4032616A DE4032616A1 (en) 1990-09-29 1990-10-15 MAGNETIC SYSTEM

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AU (1) AU642292B2 (en)
CA (1) CA2052167A1 (en)
DE (1) DE4032616A1 (en)

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AU8364791A (en) 1992-04-02
US5237301A (en) 1993-08-17
DE4032616A1 (en) 1992-04-02
CA2052167A1 (en) 1992-03-30
AU642292B2 (en) 1993-10-14

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