EP0174966B1 - Multipolar magnetization device - Google Patents
Multipolar magnetization device Download PDFInfo
- Publication number
- EP0174966B1 EP0174966B1 EP85901335A EP85901335A EP0174966B1 EP 0174966 B1 EP0174966 B1 EP 0174966B1 EP 85901335 A EP85901335 A EP 85901335A EP 85901335 A EP85901335 A EP 85901335A EP 0174966 B1 EP0174966 B1 EP 0174966B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetization
- support parts
- magnetized
- magnetize
- polar surfaces
- Prior art date
- 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.)
- Expired
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
Definitions
- the present invention relates to a multipolar magnetization device for forming on a part to be magnetized a series of magnetized zones, comprising a frame, electrical conductors arranged so as to create magnetic fields producing the magnetization of said zones, two parts of magnetic support permeable having polar surfaces between which said magnetic fields of magnetization appear, at least one of the support parts being movable with respect to the other and with respect to the frame so as to allow the said polar surfaces to be brought closer and apart of the part to be magnetized.
- This known device does not make it possible to form well delimited, strongly magnetized zones, on flat surfaces of a piece to be magnetized flat.
- the parts to be magnetized covered by the present invention are, for example, rotor parts in the form of a thin disc for electric motors as described in Swiss patent No 637508. These discs are generally made of a material with a very large coercive field such as than the samarium-cobalt and must have a relatively large number of magnetized zones of alternating polarities.
- the object of the invention is to provide a magnetization device of the type mentioned at the start which makes it possible to achieve, during the multipolar magnetization of flat parts, a high magnetization field, well delimited in each zone to be magnetized and which solves the aforementioned problem of the separation of the support parts and the removal of the magnetized parts in a series processing of such parts at a high rate and without significant loss in magnetized parts.
- the device according to the invention is characterized in that the support parts comprise planar pole surfaces for the formation of magnetized zones on planar surfaces of a flat part to be magnetized, and in that separating sheets or layers of separation sheets of a non-magnetic, electrically insulating material, of thicknesses substantially less than that of the part to be magnetized, are arranged on either side of said flat part, between the latter and the surfaces polar, the respective thicknesses of the separating sheets or the layers of separating sheets arranged on each side of the flat part to be magnetized being different.
- the magnetization device comprises two annular support parts 5, 51, made of a highly permeable material, such as an iron-cobalt alloy, between which is placed a magnetizing disc 1, of annular, flat shape, thin compared to its diameter and made for example of samarium-cobalt.
- the support parts 5, 51 have respective plane polar surfaces opposite the disk 1 and each comprise a series of radial slots such as 3 in which are housed portions of electrical conductors not shown in this figure. These conductors are arranged and connected to sources of electric current in the manner described below with reference to FIGS. 2 and 3.
- the device in FIG. 1 is intended for the magnetization of a multipolar stepper motor rotor which is in the form of the annular disc 1 partially visible in section in FIG. 2.
- Elongated conductor portions such as 21 to 28, designated as a whole by 2 in FIG. 3, are arranged parallel to the disc in the radial direction of the latter so as to produce in the circumferential direction of the disc a series of magnetized zones in the transverse direction, c ' that is to say in the axial direction of the disc.
- the conductor portions are placed in slots such as the slots 3 and 4 of the support parts 5, 51, visible in FIG. 2.
- Figure 3 shows the support part 5 in plan, the outer and inner edges of its annular surface defining the magnetized surface on the rotor disc.
- this surface is constituted by a series of elongated zones, oriented radially, and having alternate polarities on each face of the disc.
- FIG. 3 The section along line II-II of Figure 3 is shown in Figure 2.
- Each of the adjacent slots 3, 4 has a pair of portions of conductors 21, 22 and 23, 24 respectively.
- a similar arrangement of the support part 51 and of conductor portions 25, 26 and 27, 28 is placed opposite the first so as to form a gap 6 in which the disk 1 to be magnetized is arranged.
- the ends of the radial portions of conductor are connected as shown in Figure 3 so as to form groups of portions of conductors connected in series, the ends of each of these groups being connected to the terminals of a respective pulse generator device not shown.
- the ends of the different groups associated with part 5 have been designated respectively by E l , Si; E ⁇ , S ⁇ ; E 3 , S ⁇ ; ...; E lo , S io .
- Each group has twenty portions of conductors and the support has a total of one hundred slots such as 3 or 4.
- the different groups are offset with respect to each other so that in each slot are housed portions of conductors belonging to two different groups, these portions being connected for. be traversed in the same direction by the magnetization current.
- the groups overlap by half their angular extent.
- the conductors of the opposite part 51 are arranged in a similar manner, an additional offset for example of a quarter of their angular extent being preferably provided between the respective groups of the two support parts arranged opposite.
- the various pulse generating devices are arranged to supply current pulses of the same amplitude and the same duration.
- they essentially comprise a capacitor, a load resistor connected in series and a switch device arranged to connect the capacitor for a determined period of time at the terminals of the group of corresponding portions of conductors.
- the capacitor is preferably charged from an energy source common to all of the pulse generating devices.
- each pair of portions of conductors is traversed by a current of the same direction coming from two different pulse generators.
- Each conductor portion of a pair is connected in series with a conductor portion housed in the adjacent slot of the same support part so that the currents flowing in the conductor portions housed in adjacent slots are in opposite directions.
- the currents flowing in pairs of portions of conductors housed in slots arranged opposite one another are directed in the same direction.
- zone 11 of the disc 1 has for example the direction indicated in this figure by the arrows and, consequently, the magnetization of a zone 11 of the disc 1, delimited by dotted lines, is carried out in the transverse direction of the disc by revealing poles of opposite names on each of its surfaces. It also appears from FIG. 2 that the zones adjacent to the zone 11 on each side of the latter, that is to say the zones 12 and 13 partially visible, are magnetized parallel but in the opposite direction with respect to the magnetization of zone 11.
- the arrangement according to FIG. 3 has the advantage that the external connections between the different portions of conductors are made so that a closed loop is formed around each zone to be magnetized, parallel to the corresponding surface of the disc to be magnetized. This allows a particularly efficient use of the magnetization current.
- the groups of overlapping portions of conductors are oriented in the opposite direction with respect to their connections to the respective pulse generator devices.
- group E s , S ⁇ for example, the current flows in a peripheral direction in the clockwise direction
- groups E 2 , 5 2 , and E 3 , S 3 which cooperate with this group E 6 , S 6
- the current in the peripheral direction flows in the opposite direction.
- the connections to the pulse generating devices are only shown diagrammatically in FIG. 3 but it is obvious that in this case also the loop can be easily closed by an appropriate configuration of the conductors as shown for example at the connections S 3 , E4.
- the support parts 5, 51 are embedded in a plastic material forming parts 52, 53 and 54, 55 respectively.
- Each of the support parts is secured to a respective assembly 31, 32, the assembly 31 being movable in the axial direction of the disc 1, relative to the assembly 32 secured to the frame of the apparatus.
- separation sheets 56, 56 ′ made of an electrically insulating and non-magnetic material are arranged on either side of the disc to magnetize between it and the two support parts.
- the thicknesses of these sheets, or if necessary of the layers of sheets disposed respectively on either side of the part to be magnetized, are different from each other and are moreover very small compared to the thickness of the disc to be magnetized.
- the material used for these sheets is preferably "mylar", a flexible material which is practically inextensible.
- FIG. 1 A suitable means for pulling the sheets 56, 56 ′ in the desired direction is shown in FIG. 1 in the form of a roller 58 which can be actuated manually to advance by a given length the assembly of the two separation sheets which are produced in this example in the form of strips. These bands are unwound from a reserve roller 57, the rollers 57 and 58 being mounted on either side of the magnetization device proper.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Measuring Magnetic Variables (AREA)
- Magnetic Treatment Devices (AREA)
Abstract
Description
La présente invention concerne un dispositif d'aimantation multipolaire pour former sur une pièce à aimanter une série de zones aimantées, comportant un bâti, des conducteurs électriques disposés de façon à créer des champs magnétiques produisant l'aimantation desdites zones, deux parties de support magnétiquement perméables ayant des surfaces polaires entre lesquelles apparaissent lesdits champs magnétiques d'aimantation, au moins l'une des parties de support étant déplaçable par rapport à l'autre et par rapport au bâti de façon à permettre de rapprocher et d'écarter lesdites surfaces polaires de la pièce à aimanter.The present invention relates to a multipolar magnetization device for forming on a part to be magnetized a series of magnetized zones, comprising a frame, electrical conductors arranged so as to create magnetic fields producing the magnetization of said zones, two parts of magnetic support permeable having polar surfaces between which said magnetic fields of magnetization appear, at least one of the support parts being movable with respect to the other and with respect to the frame so as to allow the said polar surfaces to be brought closer and apart of the part to be magnetized.
Un tel dispositif est décrit, par exemple, dans le brevet FR-A-1 284 945.Such a device is described, for example, in patent FR-A-1 284 945.
Ce dispositif connu ne permet pas de former des zones bien délimitées, fortement aimantées, sur des surfaces planes d'une pièce à aimanter plate.This known device does not make it possible to form well delimited, strongly magnetized zones, on flat surfaces of a piece to be magnetized flat.
Les pièces à aimanter visées par la présente invention sont, par exemple, des parties de rotor en forme de disque mince pour moteurs électriques tels que décrits dans le brevet suisse No 637508. Ces disques sont généralement réalisés en un matériau à très grand champ coercitif tel que le samarium-cobalt et doivent présenter un nombre relativement grand de zones aimantées de polarités alternantes.The parts to be magnetized covered by the present invention are, for example, rotor parts in the form of a thin disc for electric motors as described in Swiss patent No 637508. These discs are generally made of a material with a very large coercive field such as than the samarium-cobalt and must have a relatively large number of magnetized zones of alternating polarities.
Dans un tel cas il est généralement difficile, d'une part, de séparer les deux parties de support une fois l'aimantation achevée et, d'autre part, d'enlever la pièce aimantée des parties de support. Il est à noter à cet égard que les pièces à aimanter sont, de par la nature du matériau utilisé et du fait de leur épaisseur, généralement faible, extrêmement fragiles.In such a case, it is generally difficult, on the one hand, to separate the two support parts once the magnetization is completed and, on the other hand, to remove the magnetized part from the support parts. It should be noted in this regard that the parts to be magnetized are, by the nature of the material used and because of their thickness, generally small, extremely fragile.
L'invention a pour but de fournir un dispositif d'aimantation du type mentionné au début qui permette d'atteindre, lors de l'aimantation multipolaire de pièces plates, un champ d'aimantation élevé, bien délimité dans chaque zone à aimanter et qui permet de résoudre le problème susmentionné de la séparation des parties de support et de l'enlèvement des pièces aimantées dans un traitement en série de telles pièces à une cadence élevée et sans perte notable en pièces aimantées.The object of the invention is to provide a magnetization device of the type mentioned at the start which makes it possible to achieve, during the multipolar magnetization of flat parts, a high magnetization field, well delimited in each zone to be magnetized and which solves the aforementioned problem of the separation of the support parts and the removal of the magnetized parts in a series processing of such parts at a high rate and without significant loss in magnetized parts.
A cet effet, le dispositif selon l'invention est caractérisé en ce que les parties de support comportent des surfaces polaires planes pour la formation de zones aimantées sur des surfaces planes d'une pièce plate à aimanter, et en ce que des feuilles de séparation ou des couches de feuilles de séparation en un matériau non-magnétique, électriquement isolant, d'épaisseurs sensiblement inférieures à celle de la pièce à aimanter, sont disposées de part et d'autre de ladite pièce plate, entre celle-ci et les surfaces polaires, les épaisseurs respectives des feuilles de séparation ou des couches de feuilles de séparation disposées de chaque côté de la partie plate à aimanter étant différentes.To this end, the device according to the invention is characterized in that the support parts comprise planar pole surfaces for the formation of magnetized zones on planar surfaces of a flat part to be magnetized, and in that separating sheets or layers of separation sheets of a non-magnetic, electrically insulating material, of thicknesses substantially less than that of the part to be magnetized, are arranged on either side of said flat part, between the latter and the surfaces polar, the respective thicknesses of the separating sheets or the layers of separating sheets arranged on each side of the flat part to be magnetized being different.
L'invention sera mieux comprise à la lumière de la description donnée ci-dessous, d'un exemple de réalisation illustré, dans le dessin annexé, dans lequel :
- La figure 1 montre, en coupe axiale, une première forme d'exécution d'un dispositif d'aimantation selon l'invention,
- La figure 2 est une vue en coupe transversale, schématique, le long de la ligne II-II de la figure 3 illustrant l'aimantation d'une zone du corps à aimanter,
- La figure 3 est un schéma de la disposition et de l'alimentation des conducteurs électriques dans le dispositif d'aimantation.
- FIG. 1 shows, in axial section, a first embodiment of a magnetization device according to the invention,
- FIG. 2 is a diagrammatic cross-section view along the line II-II of FIG. 3 illustrating the magnetization of an area of the body to be magnetized,
- Figure 3 is a diagram of the arrangement and supply of electrical conductors in the magnetization device.
Le dispositif d'aimantation selon la figure 1 comporte deux parties de support annulaires 5, 51, en un matériau hautement perméable, tel qu'un alliage fer-cobalt, entre lesquelles est placé un disque à aimanter 1, de forme annulaire, plate, de faible épaisseur par rapport à son diamètre et réalisé par exemple en samarium-cobalt. Les pièces de support 5, 51 présentent en regard du disque 1 des surfaces polaires planes respectives et comportent chacune une série de fentes radiales telles que 3 dans lesquelles sont logées des portions de conducteurs électriques non représentées sur cette figure. Ces conducteurs sont agencés et connectés à des sources de courant électrique de la façon décrite ci-après en rapport avec les figures 2 et 3.The magnetization device according to FIG. 1 comprises two
Plus particulièrement, le dispositif de la figure 1 est destiné à l'aimantation d'un rotor de moteur pas à pas multipolaire qui se présente sous forme du disque annulaire 1 partiellement visible en coupe dans la figure 2. Des portions de conducteurs allongées telles que 21 à 28, désignées dans leur ensemble par 2 dans la figure 3, sont disposées parallèlement au disque dans la direction radiale de celui-ci de manière à produire dans le sens circonférentiel du disque une série de zones aimantées dans la direction transversale, c'est-à-dire dans la direction axiale du disque. Les portions de conducteurs sont placées dans des fentes telles que les fentes 3 et 4 des parties de support 5, 51, visibles à la figure 2.More particularly, the device in FIG. 1 is intended for the magnetization of a multipolar stepper motor rotor which is in the form of the annular disc 1 partially visible in section in FIG. 2. Elongated conductor portions such as 21 to 28, designated as a whole by 2 in FIG. 3, are arranged parallel to the disc in the radial direction of the latter so as to produce in the circumferential direction of the disc a series of magnetized zones in the transverse direction, c ' that is to say in the axial direction of the disc. The conductor portions are placed in slots such as the
La figure 3 montre la partie de support 5 en plan, les bords extérieurs et intérieurs de sa surface annulaire définissant la surface aimantée sur le disque du rotor. Ainsi que cela ressortira de la suite de la description, cette surface est constituée par une série de zones allongées, orientées radialement, et présentant des polarités alteman- tes sur chaque face du disque.Figure 3 shows the
La coupe selon la ligne II-II de la figure 3 est montrée à la figure 2. Chacune des fentes voisines 3, 4 comporte une paire de portions de conducteurs 21, 22 et 23, 24 respectivement. Un arrangement analogue de la partie de support 51 et de portions de conducteur 25, 26 et 27, 28 est placé en regard du premier de façon à former un entrefer 6 dans lequel est disposé le disque 1 à aimanter. Les extrémités des portions radiales de conducteur sont reliées comme l'indique la figure 3 de manière à former des groupes de portions de conducteurs connectées en série, les extrémités de chacun de ces groupes étant branchées aux bornes d'un dispositif générateur d'impulsions respectif non représenté. Sur la figure 3, les extrémités des différents groupes associés à la partie 5 ont été désignées respectivement par El, Si ; Eε, Sε ; E3, Sε ; ... ; Elo, Sio. Chaque groupe comporte vingt portions de conducteurs et le support présente au total cent fentes telles que 3 ou 4. Les différents groupes sont décalés l'un par rapport à l'autre de sorte que dans chaque fente sont logées des portions de conducteurs appartenant à deux groupes différents, ces portions étant connectées pour. être parcourues dans le même sens par le courant d'aimantation. Dans l'exemple de la figure 3, les groupes se chevauchent de la moitié de leur étendue angulaire. Les conducteurs de la partie opposée 51 sont agencés de façon analogue, un décalage supplémentaire par exemple d'un quart de leur étendue angulaire étant de préférence prévu entre les groupes respectifs des deux parties de support disposées en regard.The section along line II-II of Figure 3 is shown in Figure 2. Each of the
D'autre part, les différents dispositifs générateurs d'impulsions sont agencés pour fournir des impulsions de courant de même amplitude et de même durée. Ils comportent par exemple essentiellement un condensateur, une résistance de charge montée en série et un dispositif interrupteur agencé pour connecter le condensateur pendant une durée déterminée aux bornes du groupe de portions de conducteurs correspondant. Le condensateur est de préférence chargé à partir d'une source d'énergie commune à l'ensemble des dispositifs générateurs d'impulsions.On the other hand, the various pulse generating devices are arranged to supply current pulses of the same amplitude and the same duration. For example, they essentially comprise a capacitor, a load resistor connected in series and a switch device arranged to connect the capacitor for a determined period of time at the terminals of the group of corresponding portions of conductors. The capacitor is preferably charged from an energy source common to all of the pulse generating devices.
Il s'ensuit que, dans le schéma de la figure 2, chaque paire de portions de conducteurs est parcourue par un courant de même sens provenant de deux générateurs d'impulsions différents. Chaque portion de conducteur d'une paire est connectée en série avec une portion de conducteur logée dans la fente voisine de la même partie de support de sorte que les courants circulant dans les portions de conducteurs logées dans des fentes voisines soient de sens opposé. D'autre part, les courants circulant dans des paires de portions de conducteurs logées dans des fentes disposées en regard l'une de l'autre sont dirigés dans le même sens. Le champ magnétique créé par quatre paires de portions de conducteurs telles que montrées à la figure 2, a ainsi par exemple le sens indiqué dans cette figure par les flèches et, par conséquent, l'aimantation d'une zone 11 du disque 1, délimitée par des traits pointillés, s'effectue dans le sens transversal du disque en faisant apparaître des pôles de noms opposés sur chacune des surfaces de celui-ci. Il ressort également de la figure 2 que les zones adjacentes à la zone 11 de chaque côté de celle-ci, c'est à dire les zones 12 et 13 partiellement visibles, sont aimantées parallèlement mais en sens inverse par rapport à l'aimantation de la zone 11.It follows that, in the diagram of FIG. 2, each pair of portions of conductors is traversed by a current of the same direction coming from two different pulse generators. Each conductor portion of a pair is connected in series with a conductor portion housed in the adjacent slot of the same support part so that the currents flowing in the conductor portions housed in adjacent slots are in opposite directions. On the other hand, the currents flowing in pairs of portions of conductors housed in slots arranged opposite one another are directed in the same direction. The magnetic field created by four pairs of portions of conductors as shown in FIG. 2, has for example the direction indicated in this figure by the arrows and, consequently, the magnetization of a zone 11 of the disc 1, delimited by dotted lines, is carried out in the transverse direction of the disc by revealing poles of opposite names on each of its surfaces. It also appears from FIG. 2 that the zones adjacent to the zone 11 on each side of the latter, that is to say the
La disposition selon la figure 3 présente l'avantage que les connexions extérieures entre les différentes portions de conducteurs sont réalisées de façon qu'une boucle fermée soit formée autour de chaque zone à aimanter, parallèlement à la surface correspondante du disque à aimanter. Ceci permet une utilisation particulièrement efficace du courant d'aimantation. Pour obtenir ces boucles fermées dans l'exemple représenté, les groupes de portions de conducteurs qui se chevauchent sont orientés en sens inverse par rapport à leurs connexions aux dispositifs générateurs d'impulsions respectifs. Ainsi, dans le groupe Es, Sε par exemple, le courant circule en direction périphérique dans le sens des aiguilles de montre, alors que dans les groupes E2, 52, et E3, S3 qui coopèrent avec ce groupe E6, S6, le courant en direction périphérique circule dans le sens inverse. Les connexions aux dispositifs générateurs d'impulsions ne sont représentés que schématiquement dans la figure 3 mais il est évident que dans ce cas également la boucle peut être aisément fermée par une configuration appropriée des conducteurs telle que montrée par exemple aux connexions S3, E4.The arrangement according to FIG. 3 has the advantage that the external connections between the different portions of conductors are made so that a closed loop is formed around each zone to be magnetized, parallel to the corresponding surface of the disc to be magnetized. This allows a particularly efficient use of the magnetization current. To obtain these closed loops in the example shown, the groups of overlapping portions of conductors are oriented in the opposite direction with respect to their connections to the respective pulse generator devices. Thus, in group E s , Sε for example, the current flows in a peripheral direction in the clockwise direction, while in groups E 2 , 5 2 , and E 3 , S 3 which cooperate with this group E 6 , S 6 , the current in the peripheral direction flows in the opposite direction. The connections to the pulse generating devices are only shown diagrammatically in FIG. 3 but it is obvious that in this case also the loop can be easily closed by an appropriate configuration of the conductors as shown for example at the connections S 3 , E4.
Selon la coupe axiale de la figure 1, les parties de support 5, 51 sont noyées dans une matière plastique formant des parties 52, 53 et 54, 55 respectivement. Chacune des parties de support est solidaire d'un ensemble respectif 31, 32, l'ensemble 31 étant déplaçable dans le sens axial du disque 1, par rapport à l'ensemble 32 solidaire du bâti de l'appareil.According to the axial section of Figure 1, the
Pour faciliter, voire même pour permettre la séparation des deux parties de support une fois l'aimantation du disque achevée, des feuilles de séparation 56, 56' en un matériau électriquement isolant et non magnétique sont disposées de part et d'autre du disque à aimanter entre celui-ci et les deux parties de support. Les épaisseurs de ces feuilles, ou le cas échéant des couches de feuilles disposées respectivement de part et d'autre de la pièce à aimanter, sont différentes entre elles et sont par ailleurs très faibles par rapport à l'épaisseur du disque à aimanter. Le matériau utilisé pour ces feuilles est de préférence le « mylar •, matériau flexible pratiquement inextensible.To facilitate, or even to allow the separation of the two support parts once the magnetization of the disc has been completed,
L'asymétrie qui résulte des épaisseurs différentes des feuilles ou couches de séparation placées entre la pièce à aimanter et les deux parties de support permet d'écarter celles-ci relativement aisément par un déplacement axial relatif, puis un déplacement des feuilles 56, 56' parallèlement aux surfaces polaires des parties de support permet de dégager le disque aimanté des surfaces polaires. Dans la pratique, il suffit de déplacer la feuille la plus mince sur laquelle l'aimant reste collé. Un moyen approprié pour tirer les feuilles 56, 56' dans le sens voulu est montré à la figure 1 sous forme d'un rouleau 58 pouvant être actionné manuellement pour faire avancer d'une longueur donnée l'ensemble des deux feuilles de séparation qui sont réalisées dans cet exemple sous forme de bandes. Ces bandes sont dévidées d'un rouleau de réserve 57, les rouleaux 57 et 58 étant montés de part et d'autre du dispositif d'aimantation proprement dit.The asymmetry which results from the different thicknesses of the sheets or separating layers placed between the part to be magnetized and the two support parts makes it possible to separate them relatively easily by a relative axial displacement, then a displacement of the
Claims (2)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1673/84A CH656246A5 (en) | 1984-04-02 | 1984-04-02 | Magnetising device |
| CH1673/84 | 1984-04-02 | ||
| CH79485A CH662208A5 (en) | 1985-02-21 | 1985-02-21 | Multipole magnetisation device |
| CH794/85 | 1985-02-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0174966A1 EP0174966A1 (en) | 1986-03-26 |
| EP0174966B1 true EP0174966B1 (en) | 1989-11-23 |
Family
ID=25685706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85901335A Expired EP0174966B1 (en) | 1984-04-02 | 1985-03-29 | Multipolar magnetization device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4707677A (en) |
| EP (1) | EP0174966B1 (en) |
| KR (1) | KR900002591B1 (en) |
| DE (1) | DE3574430D1 (en) |
| FR (1) | FR2562315B1 (en) |
| WO (1) | WO1985004512A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2243023B (en) * | 1990-04-14 | 1994-08-03 | Vacuumschmelze Gmbh | A multipolar magnetizing device |
| US5168187A (en) * | 1991-02-20 | 1992-12-01 | Dana Corporation, Warner Electric Brake & Clutch Division | Axial pole stepping motor |
| US6556115B1 (en) * | 1999-12-17 | 2003-04-29 | Seagate Technology Llc | Assembly apparatus for magnetizing magnets |
| JP2004514281A (en) * | 2000-11-15 | 2004-05-13 | ハースト マグネティック インストルメンツ リミテッド | Method and apparatus for magnetizing a plurality of adjacent portions composed of a magnetizable material |
| EP1612813A3 (en) * | 2001-09-11 | 2009-12-09 | JTEKT Corporation | Magnetizing device with pole array, and magnetizing method |
| CN103000333B (en) * | 2012-11-30 | 2015-03-18 | 上海电气电站设备有限公司 | Magnetizing tool of permanent-magnetic machine and using method thereof |
| CN110379584B (en) * | 2019-06-11 | 2021-03-16 | 温州任和文化创意有限责任公司 | Magnetizing plate for magnetic adhesive tape production |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3201663A (en) * | 1958-10-16 | 1965-08-17 | Duncan Electric Co Inc | Magnetizing method |
| FR1260695A (en) * | 1960-03-30 | 1961-05-12 | Normacem Sa | Manufacturing process of rotating electrical machines |
| FR1284945A (en) * | 1961-03-25 | 1962-02-16 | Smith & Sons Ltd S | Permanent magnet bodies and their magnetization process |
| US3434084A (en) * | 1961-08-14 | 1969-03-18 | Duncan Electric Co Inc | Method of magnetizing magnets for a repulsion type of suspension |
| US4330727A (en) * | 1979-12-27 | 1982-05-18 | Claude Oudet | Electric step motor |
-
1985
- 1985-03-29 DE DE8585901335T patent/DE3574430D1/en not_active Expired
- 1985-03-29 US US06/811,837 patent/US4707677A/en not_active Expired - Lifetime
- 1985-03-29 EP EP85901335A patent/EP0174966B1/en not_active Expired
- 1985-03-29 FR FR8504801A patent/FR2562315B1/en not_active Expired
- 1985-03-29 KR KR1019850700355A patent/KR900002591B1/en not_active IP Right Cessation
- 1985-03-29 WO PCT/CH1985/000051 patent/WO1985004512A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| US4707677A (en) | 1987-11-17 |
| FR2562315B1 (en) | 1987-12-04 |
| WO1985004512A1 (en) | 1985-10-10 |
| EP0174966A1 (en) | 1986-03-26 |
| FR2562315A1 (en) | 1985-10-04 |
| KR900002591B1 (en) | 1990-04-20 |
| DE3574430D1 (en) | 1989-12-28 |
| KR860700071A (en) | 1986-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1067954A (en) | Permanent and electro-permanent magnets magnetic plate | |
| EP0201021B1 (en) | Electric synchronous motor with a disc-shaped rotor | |
| EP0667991B1 (en) | Electromechanical converter device producing linear motion | |
| EP0201022A2 (en) | Electric synchronous motor with a disc-shaped rotor | |
| FR2563059A1 (en) | VERNIER ELECTRODYNAMIC MACHINE | |
| EP0174966B1 (en) | Multipolar magnetization device | |
| FR2557394A1 (en) | CONTINUOUS CURRENT MOTOR WITHOUT A COLLECTOR WITH A THREE-PHASE WINDING | |
| EP0174322B1 (en) | Multipolar magnetization device | |
| EP0015244B1 (en) | Process for manufacturing stators for stepping motors of electronic watches, and motor realized according to the process | |
| FR2925989A1 (en) | ELECTRIC MOTOR FOR MANEUVERING AN ELEMENT FOR OCCULTATION OR SOLAR PROTECTION IN A BUILDING | |
| EP0128052B1 (en) | Cyclotron with defocusing system | |
| EP0378596B1 (en) | Two-phase or multiphase synchronous electric motor with disk-shaped rotor | |
| EP0884823B1 (en) | Electromagnetical drive apparatus with moving permanent magnet | |
| EP0248798A1 (en) | Synchronous electric motor with magnetized rotor and method for fabricating said motor. | |
| CH690632A5 (en) | electromagnetic motor with two coaxial rotors. | |
| EP0268619B1 (en) | Electromagnetic actuation device | |
| CH656246A5 (en) | Magnetising device | |
| CH662208A5 (en) | Multipole magnetisation device | |
| FR2639486A1 (en) | Rotating machine with permanent magnets and magnetic flux looping | |
| WO2014122374A1 (en) | Electromagnetic motor or generator with a plurality of air gaps having permanent magnets and ironless winding element | |
| FR2568067A1 (en) | Stand-alone magnetic motor with permanent magnets | |
| FR2846482A1 (en) | Rotor for dual-excitation electrical rotating machine with independent magnets, uses magnets of alternating polarity distributed round rotor periphery to face magnetic end plates | |
| FR2497022A1 (en) | MOTOR NOT WITHOUT DIPHASE | |
| CH363710A (en) | Rotating electric machine with discoidal elements | |
| CH663300A5 (en) | Electric motor with disc-shaped magnetised rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB LI NL |
|
| 17P | Request for examination filed |
Effective date: 19860312 |
|
| 17Q | First examination report despatched |
Effective date: 19870803 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB LI NL |
|
| REF | Corresponds to: |
Ref document number: 3574430 Country of ref document: DE Date of ref document: 19891228 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19900331 Ref country code: CH Effective date: 19900331 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: RT |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19901130 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20040227 Year of fee payment: 20 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20040303 Year of fee payment: 20 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040305 Year of fee payment: 20 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20050328 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20050329 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 |
|
| NLV7 | Nl: ceased due to reaching the maximum lifetime of a patent |
Effective date: 20050329 |