EP0886875A1 - Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same - Google Patents

Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same

Info

Publication number
EP0886875A1
EP0886875A1 EP97900660A EP97900660A EP0886875A1 EP 0886875 A1 EP0886875 A1 EP 0886875A1 EP 97900660 A EP97900660 A EP 97900660A EP 97900660 A EP97900660 A EP 97900660A EP 0886875 A1 EP0886875 A1 EP 0886875A1
Authority
EP
European Patent Office
Prior art keywords
magnet
poles
magnetic
actuator
electromagnetic actuator
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.)
Granted
Application number
EP97900660A
Other languages
German (de)
French (fr)
Other versions
EP0886875B1 (en
Inventor
Pierre Gandel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Moving Magnet Technologie SA
Original Assignee
Moving Magnet Technologie SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Moving Magnet Technologie SA filed Critical Moving Magnet Technologie SA
Publication of EP0886875A1 publication Critical patent/EP0886875A1/en
Application granted granted Critical
Publication of EP0886875B1 publication Critical patent/EP0886875B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap

Definitions

  • the present invention relates to a single phase rotary electromagnetic actuator.
  • the actuator In certain applications, in particular for controlling the recirculation or air intake valve, it is desirable for the actuator to return to a determined rest position.
  • the torque actuators due to the constant current of the state of the art are generally coupled in their applications with a return spring which allows, in the event of a cut in the electrical supply to the actuator, close the air intake valve to cut off the air supply to the heat engine.
  • a return spring is bulky, presents risks of rupture and its return torque must be adjusted relative to the position of the valve.
  • the object of the invention is to remedy these drawbacks by proposing an actuator comprising means for returning to the simple rest position, inexpensive, and requiring no adjustment.
  • the actuator comprises a fixed member constituted by a stator circuit excited by at least one electric coil, and a member movable in rotation comprising a thin magnet having 2N pairs of magnetic poles magnetized in alternating directions.
  • the actuator further comprises return means for bringing the movable member to a predetermined angular rest position constituted by a thin auxiliary return magnet disposed in the air gap, having 2N pairs of magnetic poles magnetized in an alternating direction and integral with the stator poles.
  • the rotor poles and the magnetic poles of the auxiliary return magnet are in the form of thin annular sectors.
  • the rotor poles and the magnetic poles of the auxiliary return magnet are of tubular shape.
  • the auxiliary return magnet is bonded to the stator poles in a position such that the equilibrium position without current of the rotor corresponds to the position without current sought.
  • the rotor cooperates with the fixed member by means of a ball stop limiting the movement of the rotor in the direction of the fixed organ.
  • the ball bearing is substantially coplanar with the plane passing through the end of the stator poles.
  • the 2N-pole magnetic disc constituting the auxiliary magnet has a central recess with a section at least equal to the section of the ball bearing.
  • the rotor magnet is integral with a cylinder head made of a soft magnetic material.
  • the stator further comprises a fixed closing yoke made of a soft magnetic material.
  • the invention also relates to a valve, in particular an air intake valve for an internal combustion engine, driven by such an actuator.
  • the auxiliary return magnet will be arranged so that the rest position corresponding to a partial opening of the air intake.
  • FIG. 1 shows an exploded view of an actuator according to the invention
  • FIG. 3 represents a view in median section of an actuator according to the invention
  • - Figure 4 shows a top view of one actuator
  • - Figure 5 shows a cross-sectional view of an alternative embodiment.
  • FIG. 1 represents an exploded view of a first embodiment of an actuator according to the invention.
  • the actuator is made up of a fixed part (1) and a mobile part in rotation (2).
  • the fixed part (1) has 4 stator poles (3 to 6) in the form of annular sectors each excited by an electric coil (7 to 10).
  • the stator poles (3 to 6) are extended by cores surrounded by the electric coil (7 to 10), these cores being integral with a base (11).
  • the statori ⁇ ue structure is known and is not explained in more detail.
  • the rotor part (2) has 4 magnetic poles formed by thin magnets (12 to 15) in the form of annular sectors magnetized in alternating directions, perpendicular to the transverse plane of the annular sectors.
  • the magnetized sectors (12 to 15) are bonded to a yoke (16). This cylinder head is mounted on an axis not shown.
  • the actuator comprises a second series of magnetized annular sectors (17 to 20) in alternating directions. These magnetized annular sectors (17 to 20) form an auxiliary return magnet bonded to the stator poles (3 to 6).
  • FIG. 2 represents the torque curves as a function of the angular position of such an actuator.
  • the curves (70 to 72) correspond to the torque as a function of the position, for a current of 1.5, 1 and 0.5 amps respectively.
  • the curve (31) represents the torque in the absence of current, for a displacement of the rotary member (2) in the trigonometric direction.
  • the curve (32) represents the torque in the absence of current, for a displacement of the rotary member (2) in the anti-direction trigonometric
  • the curves (74 to 76) correspond to the torque as a function of the position, for a current of respectively - 1.5, - 1 and - 0.5 amps.
  • the cylinder head (35) has a cylindrical housing (38) provided with a bearing (39).
  • the stato ⁇ que part (1) has a bearing (36).
  • the positioning and guiding of the cylinder head (35) is ensured by a ball bearing (37) interposed between the two bearings (36, 39)
  • the cylinder head (35) is integral with an axis (40) passing through an orifice provided in the base (41).
  • This orifice (42) has a section greater than the section of the axis (40) so that this axis is never guided by the staton ⁇ ue part.
  • the positioning, and in particular the centering of the axis results solely from the magnetic positioning. by the magnetic cooperation of the main magnet (43) with the stator poles (44), and the limitation of the axial displacement due to the ball bearing (37) the stator poles are excited in known manner by coils (50, 51 ).
  • the auxiliary return magnet (45) is bonded to the stator poles.
  • Figure 4 shows a top view of 1 actuator previously described.
  • the magnetization transitions (52, 53) of the main magnet are angularly offset, in the rest position, relative to the magnetization transitions (54 to 57) of the main magnet.
  • FIG. 5 represents another alternative embodiment relating to an actuator with a tubular rotor.
  • the actuator is composed of a stator (60) excited by two electric coils (61, 62) defining a cylindrical cavity inside which is placed a rotor (63) having two semi-tubular magnets (64, 65) magnet radially in opposite directions. These magnets (64, 65) are bonded to a yoke (66).
  • the stator comprises two semi-tubular auxiliary magnets (66, 67) magnetized radially in opposite directions housed in the central cavity, in the tubular air gap

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

A single-phase electromagnetic actuator with a torque caused by a constant current over a major part of the working stroke, and a magnetic righting torque about an inoperative position that is stable in the absence of a current. The actuator comprises a stationary device (1) consisting of stator circuit energised by at least one electric coil, and a rotatably movable device (2) comprising a thin magnet with 2N pairs of magnetic poles magnetised in alternate directions. The actuator further comprises righting means for returning the movable device (2) to a predetermined inoperative angular position, said righting means being magnetic or magnetostatic means consisting of a thin auxiliary righting magnet (34) arranged in the air gap, provided with 2N pairs of magnetic poles magnetised in alternate directions, and secured to the stator poles.

Description

ACTIONNEUR ELECTROMAGNETIQUE MONOPHASE ROTATIF A RESSORT MAGNETIQUE ET VANNE ELECTRIQUE METTANT EN OEUVRE UN TEL ACTIONNEUR. SINGLE - PHASE ROTARY ELECTROMAGNETIC ACTUATOR WITH MAGNETIC SPRING AND ELECTRIC VALVE USING SUCH AN ACTUATOR.
La présente invention concerne un actionneur électromagnétique monophasé rotatif .The present invention relates to a single phase rotary electromagnetic actuator.
On connaît dans l'état de la technique des actionneurs électromagnétique monophasé à couple dû au courant constant sur la plus grande partie de la course utile. De tels actionneurs sont par exemple décrit dans les demandes de brevet FR8908052, FR9015782 et FR9202435 de la demanderesse.In the state of the art, single-phase electromagnetic actuators with torque due to the constant current over most of the useful travel are known. Such actuators are for example described in patent applications FR8908052, FR9015782 and FR9202435 of the applicant.
Pour certaines applications, notamment pour la commande de vanne de recirculation ou d'admission d'air, il est souhaitable que l'actionneur retourne dans une position de repos déterminée.For certain applications, in particular for controlling the recirculation or air intake valve, it is desirable for the actuator to return to a determined rest position.
Pour réaliser cette fonction, les actionneurs à couple dû au courant constant de l'état de la technique- sont en général couplés dans leurs applications avec un ressort de rappel qui permet, en cas de coupure de l'alimentation électrique de l'actionneur, de refermer complément la vanne d'admission d'air pour couper l'alimentation en air du moteur thermique. Un tel ressort de rappel est encombrant, présente des risques de rupture et son couple de rappel doit être réglé par rapport à la position de la vanne.To perform this function, the torque actuators due to the constant current of the state of the art are generally coupled in their applications with a return spring which allows, in the event of a cut in the electrical supply to the actuator, close the air intake valve to cut off the air supply to the heat engine. Such a return spring is bulky, presents risks of rupture and its return torque must be adjusted relative to the position of the valve.
La fermeture complète de la vanne en cas d'incident électrique pose par ailleurs des problèmes. En effet, il serait préférable de maintenir une légère ouverture de la vanne d'admission d'air, afin de permettre le retour du véhicule en mode dégradé jusqu'au garage le plus proche et d'éviter à la vanne de coller au corps de la vanne en cas de gel, et enfin de permettre un réglage du régime de ralenti par l'actionneur principal autour d'une position d'ouverture d'environ 10°. Cette dernière caractéristique permet ' d'éviter la réalisation d'une dérivation d'air avec un actionneur supplémentaire de réglage de ralenti.Completely closing the valve in the event of an electrical incident also poses problems. Indeed, it would be preferable to maintain a slight opening of the air intake valve, in order to allow the vehicle to return in degraded mode to the nearest garage and to prevent the valve from sticking to the body. the valve in the event of frost, and finally to allow adjustment of the idle speed by the main actuator around an open position of approximately 10 °. This last feature allows' to avoid producing a air bypass actuator with an additional idle setting.
Cette fonction est réalisée actuellement avec deux ressorts mécaniques extérieurs à l'actionneur, montés en opposition, l'ouverture étant réglée par des butées. Un tel mécanisme est encombrant, coûteux et difficile à régler.This function is currently performed with two mechanical springs external to the actuator, mounted in opposition, the opening being adjusted by stops. Such a mechanism is bulky, expensive and difficult to adjust.
L'objet de l'invention est de remédier à ces inconvénients en proposant un actionneur comportant des moyens de retour en position de repos simple, peu coûteux, et ne nécessitant pas de réglage.The object of the invention is to remedy these drawbacks by proposing an actuator comprising means for returning to the simple rest position, inexpensive, and requiring no adjustment.
A cet effet, l'actionneur selon l 'invention comporte un organe fixe constitué par un circuit statorique excité par au moins une bobine électrique, et un organe mobile en rotation comportant un aimant mince présentant 2N paires de pôles magnétiques aimantés en sens alterné. L'actionneur comporte en outre des moyens de rappel pour ramener l'organe mobile dans une position angulaire de repos prédéterminée constitués par un aimant auxiliaire mince de rappel disposé dans l'entrefer, présentant 2N paires de pôles magnétiques aimantés en sens alterné et solidaire des pôles statoriques .To this end, the actuator according to the invention comprises a fixed member constituted by a stator circuit excited by at least one electric coil, and a member movable in rotation comprising a thin magnet having 2N pairs of magnetic poles magnetized in alternating directions. The actuator further comprises return means for bringing the movable member to a predetermined angular rest position constituted by a thin auxiliary return magnet disposed in the air gap, having 2N pairs of magnetic poles magnetized in an alternating direction and integral with the stator poles.
Selon une première variante, les pôles rotoriques et les pôles magnétiques de l'aimant auxiliaire de rappel sont en forme de secteurs annulaires minces.According to a first variant, the rotor poles and the magnetic poles of the auxiliary return magnet are in the form of thin annular sectors.
Selon une deuxième variante, les pôles rotoriques et les pôles magnétiques de l'aimant auxiliaire de rappel sont de forme tubulaire.According to a second variant, the rotor poles and the magnetic poles of the auxiliary return magnet are of tubular shape.
De préférence, l'aimant auxiliaire de rappel est collé sur les pôles statoriques dans une position telle que la position d'équilibre sans courant du rotor corresponde à la position sans courant recherchée.Preferably, the auxiliary return magnet is bonded to the stator poles in a position such that the equilibrium position without current of the rotor corresponds to the position without current sought.
Selon un mode de réalisation particulier, le rotor coopère avec l'organe fixe par l'intermédiaire d'une butée à bille limitant le déplacement du rotor en direction de l'organe fixe. La butée à bille est sensiblement coplanaire avec le plan passant par l'extrémité des pôles statoriques. Le disque magnétique à 2N pôles constituant l'aimant auxiliaire comporte un evidement central d'une section au moins égale à la section de la butée à bille.According to a particular embodiment, the rotor cooperates with the fixed member by means of a ball stop limiting the movement of the rotor in the direction of the fixed organ. The ball bearing is substantially coplanar with the plane passing through the end of the stator poles. The 2N-pole magnetic disc constituting the auxiliary magnet has a central recess with a section at least equal to the section of the ball bearing.
Selon une variante, l'aimant rotorique est solidaire d'une culasse en un matériau magnétique doux.According to a variant, the rotor magnet is integral with a cylinder head made of a soft magnetic material.
Selon une autre variante, le stator comporte en outre une culasse de fermeture fixe réalisée en un matériau magnétique doux.According to another variant, the stator further comprises a fixed closing yoke made of a soft magnetic material.
L'invention concerne également une vanne, en particulier vanne d'admission d'air pour un moteur à explosion, entraîné par un tel actionneur.The invention also relates to a valve, in particular an air intake valve for an internal combustion engine, driven by such an actuator.
De préférence, l'aimant auxiliaire de rappel sera disposé de manière à ce que la position au repos correspondante à une ouverture partielle de l'admission d' air.Preferably, the auxiliary return magnet will be arranged so that the rest position corresponding to a partial opening of the air intake.
L'invention sera mieux comprise à la lecture de la description qui suit, faisant référence aux figures annexées concernant un mode de réalisation non limitatif,The invention will be better understood on reading the description which follows, referring to the appended figures relating to a nonlimiting embodiment,
OÙ:OR:
- la figure 1 représente une vue éclatée d'un actionneur selon l'invention ;- Figure 1 shows an exploded view of an actuator according to the invention;
- la figure 2 représente la courbe du couple en fonction de la position angulaire ; la figure 3 représente une vue en coupe médiane d'un actionneur selon l'invention ;- Figure 2 shows the torque curve as a function of the angular position; FIG. 3 represents a view in median section of an actuator according to the invention;
- la figure 4 représente une vue de dessus de 1 'actionneur ; - la figure 5 représente une vue en coupe transversale d'une variante de réalisation.- Figure 4 shows a top view of one actuator; - Figure 5 shows a cross-sectional view of an alternative embodiment.
La figure 1 représente une vue éclatée d'un premier mode de réalisation d'un actionneur selon 1 ' invention. L'actionneur est composé par une partie fixe (1) et une partie mobile en rotation (2) . La partie fixe (1) présente 4 pôles statoriques (3 à 6) en forme de secteurs annulaires excités chacun par une bobine électrique (7 à 10) . Les pôles statoriques (3 à 6) sont prolongés par des noyaux entourés par les bobine électrique (7 à 10) , ces noyaux étant solidaires d'une embase (11) .FIG. 1 represents an exploded view of a first embodiment of an actuator according to the invention. The actuator is made up of a fixed part (1) and a mobile part in rotation (2). The fixed part (1) has 4 stator poles (3 to 6) in the form of annular sectors each excited by an electric coil (7 to 10). The stator poles (3 to 6) are extended by cores surrounded by the electric coil (7 to 10), these cores being integral with a base (11).
La structure statoriσue est connue et n'est pas exposée plus en détail. La partie rotorique (2) comporte 4 pôles magnétiques formés par des aimants minces (12 à 15) en forme de secteurs annulaires aimantés en sens alternés, perpendiculairement au plan transversal des secteurs annulaires. Dans l'exemple décrit, les secteurs aimantés (12 à 15) sont collés sur une culasse (16) . Cette culasse est montée sur un axe non représenté.The statoriσue structure is known and is not explained in more detail. The rotor part (2) has 4 magnetic poles formed by thin magnets (12 to 15) in the form of annular sectors magnetized in alternating directions, perpendicular to the transverse plane of the annular sectors. In the example described, the magnetized sectors (12 to 15) are bonded to a yoke (16). This cylinder head is mounted on an axis not shown.
L'actionneur comporte une deuxième série de secteurs annulaires aimantés (17 à 20) en sens alternés. Ces secteurs annulaires aimantés (17 à 20) forment un aimant auxiliaire de rappel collé sur les pôles statoriques (3 à 6) .The actuator comprises a second series of magnetized annular sectors (17 to 20) in alternating directions. These magnetized annular sectors (17 to 20) form an auxiliary return magnet bonded to the stator poles (3 to 6).
Aussi longtemps que la transition entre deux pôles rotoriques adjacents reste en vis à vis de la surface d'un pôle statorique, l'actionneur fournira un couple du au courant constant et proportionnel au courant. La figure 2 représente les courbes couple en fonction de la position angulaire d'un tel actionneur.As long as the transition between two adjacent rotor poles remains opposite the surface of a stator pole, the actuator will provide constant current torque proportional to the current. FIG. 2 represents the torque curves as a function of the angular position of such an actuator.
Les courbes (70 à 72) correspond au couple en fonction de la position, pour un courant de respectivement de 1,5, 1 et 0,5 ampères. La courbe (31) représente le couple en l'absence de courant, pour un déplacement de l'organe rotatif (2) dans le sens trigonométrique. La courbe (32) représente le couple en l'absence de courant, pour un déplacement de l'organe rotatif (2) dans le sens anti- trigonométrique Les courbes (74 à 76) correspond au couple en fonction de la position, pour un courant de respectivement de - 1,5, - 1 et - 0,5 ampères.The curves (70 to 72) correspond to the torque as a function of the position, for a current of 1.5, 1 and 0.5 amps respectively. The curve (31) represents the torque in the absence of current, for a displacement of the rotary member (2) in the trigonometric direction. The curve (32) represents the torque in the absence of current, for a displacement of the rotary member (2) in the anti-direction trigonometric The curves (74 to 76) correspond to the torque as a function of the position, for a current of respectively - 1.5, - 1 and - 0.5 amps.
La figure 3 représente une vue en coupe d'une autre variante de réalisation, la culasse (35) présente un logement (38) cylindrique muni d'un palier (39) . De même, la partie statoπque (1) présente un palier (36) . Le positionnement et le guidage de la culasse (35) sont assurés par un roulement a bille (37) intercalé entre les deux paliers (36, 39) La culasse (35) est solidaire d'un axe (40) traversant un orifice prévu dans l'embase (41) . Cet orifice (42) présente une section supérieure à la section de -i axe (40) de telle sorte que cet axe n'est jamais guidé par la partie statonσue Le positionnement, et notamment le centrage de l'axe résulte uniquement du positionnement magnétique par la coopération magnétique de l 'aimant principal (43) avec les pôles statoriques (44) , et la limitation du déplacement axial dû à la butée à billes (37) les pôles statoriques sont excités de manière connue par des bobines (50, 51) .3 shows a sectional view of another alternative embodiment, the cylinder head (35) has a cylindrical housing (38) provided with a bearing (39). Similarly, the statoπque part (1) has a bearing (36). The positioning and guiding of the cylinder head (35) is ensured by a ball bearing (37) interposed between the two bearings (36, 39) The cylinder head (35) is integral with an axis (40) passing through an orifice provided in the base (41). This orifice (42) has a section greater than the section of the axis (40) so that this axis is never guided by the statonσue part. The positioning, and in particular the centering of the axis, results solely from the magnetic positioning. by the magnetic cooperation of the main magnet (43) with the stator poles (44), and the limitation of the axial displacement due to the ball bearing (37) the stator poles are excited in known manner by coils (50, 51 ).
L'aimant auxiliaire (45) de rappel est collé sur les pôles statoriques.The auxiliary return magnet (45) is bonded to the stator poles.
La figure 4 représente une vue de dessus de 1 actionneur précédemment décrit. Les transitions d'aimantation (52, 53) de l'aimant principal sont décalées angulairement, en position de repos, par rapport aux transitions d'aimantation (54 à 57) de l'aimant principal.Figure 4 shows a top view of 1 actuator previously described. The magnetization transitions (52, 53) of the main magnet are angularly offset, in the rest position, relative to the magnetization transitions (54 to 57) of the main magnet.
La figure 5 représente une autre variante de réalisation relative à un actionneur à rotor tubulaire L'actionneur est composé par un stator (60) excite par deux bobines électriques (61, 62) définissant une cavité cylindrique à l'intérieur de laquelle est placée un rotor (63) présentant deux aimants semi-tubulaires (64, 65) aimantes radialement en sens opposé. Ces aimants (64, 65) sont collés sur une culasse (66) . Le stator comporte deux aimants auxiliaires (66, 67) semi-tubulaires aimantés radialement en sens opposé logés dans la cavité centrale, dans l'entrefer tubulaire FIG. 5 represents another alternative embodiment relating to an actuator with a tubular rotor. The actuator is composed of a stator (60) excited by two electric coils (61, 62) defining a cylindrical cavity inside which is placed a rotor (63) having two semi-tubular magnets (64, 65) magnet radially in opposite directions. These magnets (64, 65) are bonded to a yoke (66). The stator comprises two semi-tubular auxiliary magnets (66, 67) magnetized radially in opposite directions housed in the central cavity, in the tubular air gap

Claims

REVENDICATIONS
1 - Actionneur électromagnétique monophasé à couple du au courant constant sur la plus grande partie de la course utile et à couple de rappel magnétique autour d'une position de repos stable sans courant, comportant un organe fixe (1) constitué par un circuit statorique excité par au moins une bobine électrique, et un organe mobile (2) en rotation comportant un aimant mince présentant 2N paires de pôles magnétiques aimantés en sens alterné, l'actionneur comportant en outre des moyens de rappel pour ramener l'organe mobile (2) dans une position angulaire de repos prédéterminée caractérisé en ce que les moyens de rappel sont des moyens magnétiques ou magnétostatiques constitués par un aimant auxiliaire (34) mince de rappel disposé dans l'entrefer présentant 2N paires de pôles magnétiques aimantés en sens alterné et solidaire des pôles statoriques.1 - Single-phase electromagnetic actuator with torque due to constant current over most of the useful travel and with magnetic return torque around a stable rest position without current, comprising a fixed member (1) constituted by an excited stator circuit by at least one electric coil, and a movable member (2) in rotation comprising a thin magnet having 2N pairs of magnetic poles magnetized in alternating directions, the actuator further comprising return means for bringing the movable member (2) in a predetermined angular rest position characterized in that the return means are magnetic or magnetostatic means constituted by a thin auxiliary return magnet (34) disposed in the air gap having 2N pairs of magnetic poles magnetized in an alternating direction and integral with the stator poles.
2 - Actionneur électromagnétique monophasé à couple dû au courant constant sur la plus grande partie de la course utile selon la revendication 1 caractérisé en ce que les pôles rotoriques et les pôles magnétiques de l'aimant auxiliaire de rappel sont en forme de secteurs annulaires minces .2 - Single-phase electromagnetic actuator with torque due to the constant current over most of the useful stroke according to claim 1 characterized in that the rotor poles and the magnetic poles of the auxiliary return magnet are in the form of thin annular sectors.
3 - Actionneur électromagnétique monophasé à couple dû au courant constant sur la plus grande partie de la course utile selon la revendication 1 caractérisé en ce que les pôles rotoriques et les pôles magnétiques de l'aimant auxiliaire de rappel sont de forme tubulaire.3 - Single-phase electromagnetic actuator with torque due to the constant current over most of the useful stroke according to claim 1 characterized in that the rotor poles and the magnetic poles of the auxiliary return magnet are tubular.
4 - Actionneur électromagnétique monophasé à couple dû au courant constant sur la plus grande partie de la course utile selon l'une quelconque des revendications précédentes caractérisé en ce que l'aimant auxiliaire de rappel est collé sur les pôles statoriques dans une position telle que la position d'équiliore sans courant du rotor corresponde a la position sans courant recherchée4 - Single-phase electromagnetic actuator with torque due to the constant current over most of the useful stroke according to any one of the preceding claims, characterized in that the auxiliary return magnet is bonded to the stator poles in a position such that the equilibrium position without current of the rotor corresponds to the position without current sought
5 - Actionneur électromagnétique monophasé a couple du au courant constant sur la plus grande partie de la course utiJe selon ] 'une quelconque des revendications précédentes caractérisé en ce que le rotor coopère avec l'organe fixe (1) par l'intermédiaire d'une butée a bille limitant le déplacement du rotor en direction de l'organe fixe, ladite butée à bille étant sensiblement coplanaire avec le plan passant par l'extrémité des pôles statoriques l'aimant auxilliaire étant formé par un disque magnétique a 2N pôles comportant un evidement central d'une section au moins égale à la section de la butée a bille5 - Single-phase electromagnetic actuator with torque at constant current over most of the travel utiJe according to 'any of the preceding claims characterized in that the rotor cooperates with the fixed member (1) via a ball stop limiting the movement of the rotor in the direction of the fixed member, said ball stop being substantially coplanar with the plane passing through the end of the stator poles, the auxiliary magnet being formed by a 2N-pole magnetic disc having a recess center of a section at least equal to the section of the ball bearing
6 - Actionneur électromagnétique monophasé a couple dû au courant constant sur la plus grande partie de la course utile selon l'une quelconque des revendications précédentes caractérisé en ce que l'aimant rotorique est solidaire d'une culasse en un matériau magnétique doux6 - Single-phase electromagnetic actuator with torque due to the constant current over most of the useful stroke according to any one of the preceding claims, characterized in that the rotor magnet is integral with a cylinder head made of a soft magnetic material
7 - Actionneur électromagnétique monophase a couple dû au courant constant sur la plus grande partie de la course utile selon l'une quelconque des revendications précédentes caractérise en ce que le stator comporte en outre une culasse de fermeture fixe réalisée en un matériau magnétique doux.7 - Single-phase electromagnetic actuator has torque due to the constant current over most of the useful travel according to any one of the preceding claims, characterized in that the stator further comprises a fixed closing yoke made of a soft magnetic material.
8 - Vanne, en particulier vanne d admission d'air pour un moteur a explosion, entraîné par un actionneur monophasé à couple du au courant constant sur la plus grande partie de la course utile, comportant un organe fixe8 - Valve, in particular air intake valve for an internal combustion engine, driven by a single-phase actuator with torque due to constant current over most of the useful stroke, comprising a fixed member
(1) constitué par un circuit statorique excité par au moins une bobine électrique, et un organe mobile (2) en rotation comportant un aimant mince présentant 2N paires de pôles magnétiques aimantés en sens alterné, l'actionneur comportant en outre des moyens de rappel pour ramener l'organe mobile (2) dans une position angulaire de repos prédéterminée caractérisé en ce que les moyens de rappeJ sont constitués par un aimant auxiliaire mince de rappel disposé dans l 'entrefer présentant 2N paires de pôles magnétiques aimantés en sens alterné et solidaire des pôles statoriques .(1) constituted by a stator circuit excited by at least one electric coil, and a movable member (2) in rotation comprising a thin magnet having 2N pairs of poles magnetic alternately magnetized, the actuator further comprising return means for bringing the movable member (2) to a predetermined angular position of rest characterized in that the return means consist of a thin auxiliary return magnet arranged in the air gap having 2N pairs of magnetic poles magnetized in an alternating direction and integral with the stator poles.
S Vanne, en particulier vanne d'admission d'air pour un moteur à explosion, selon la revendication 6 caractérisé en ce que l'aimant auxiliaire de rappel soit disposé de manière ce que la position au repos correspondante à une ouverture partielle de l'admission d'air . S Valve, in particular air intake valve for an internal combustion engine, according to claim 6 characterized in that the auxiliary return magnet is arranged so that the position at rest corresponding to a partial opening of the air intake.
EP97900660A 1996-01-17 1997-01-16 Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same Expired - Lifetime EP0886875B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9600496 1996-01-17
FR9600496A FR2744559B1 (en) 1996-01-17 1996-01-17 SINGLE-PHASE ROTARY ELECTROMAGNETIC ACTUATOR WITH MAGNETIC SPRING AND ELECTRIC VALVE USING SUCH AN ACTUATOR
PCT/FR1997/000080 WO1997026667A1 (en) 1996-01-17 1997-01-16 Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same

Publications (2)

Publication Number Publication Date
EP0886875A1 true EP0886875A1 (en) 1998-12-30
EP0886875B1 EP0886875B1 (en) 2008-05-21

Family

ID=9488188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97900660A Expired - Lifetime EP0886875B1 (en) 1996-01-17 1997-01-16 Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same

Country Status (6)

Country Link
EP (1) EP0886875B1 (en)
JP (1) JP2000503165A (en)
AT (1) ATE396486T1 (en)
DE (1) DE69738708D1 (en)
FR (1) FR2744559B1 (en)
WO (1) WO1997026667A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017005870A1 (en) 2015-07-07 2017-01-12 Mmt Sa Direct-drive electromagnetic actuator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828151A (en) * 1997-08-27 1998-10-27 Cts Corporation Self aligning actuator with low bearing wear
FR2997745B1 (en) 2012-11-06 2014-11-07 Sonceboz Automotive Sa MOTORIZED OVERHEAD VALVE WITH IMPROVED SEALING
CN109764221B (en) * 2017-08-31 2021-04-27 北京影谱科技股份有限公司 Cloud platform

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596970A (en) * 1984-12-21 1986-06-24 Pneumo Corporation Limited angle torque motor with high stiffness and natural frequency
DE3908545C2 (en) * 1989-03-16 1995-01-05 Vdo Schindling Adjustment drive for a throttle valve of an internal combustion engine
FR2670629B1 (en) * 1990-12-17 1995-03-10 Moving Magnet Tech ROTARY SINGLE - PHASE ELECTROMAGNETIC ACTUATOR.
JP2573859Y2 (en) * 1991-11-21 1998-06-04 株式会社ハーモニック・ドライブ・システムズ Home position return mechanism for electromagnetic finite rotary motor
FR2688105B1 (en) * 1992-02-28 1994-05-06 Moving Magnet Technologies Sa ELECTROMAGNETIC ROTARY ACTUATOR SINGLE-PHASE RACE BETWEEN 60 AND 120 DEGREES.
US5337030A (en) * 1992-10-08 1994-08-09 Lucas Industries, Inc. Permanent magnet brushless torque actuator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9726667A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017005870A1 (en) 2015-07-07 2017-01-12 Mmt Sa Direct-drive electromagnetic actuator

Also Published As

Publication number Publication date
WO1997026667A1 (en) 1997-07-24
EP0886875B1 (en) 2008-05-21
JP2000503165A (en) 2000-03-14
FR2744559A1 (en) 1997-08-08
FR2744559B1 (en) 1998-04-10
ATE396486T1 (en) 2008-06-15
DE69738708D1 (en) 2008-07-03

Similar Documents

Publication Publication Date Title
EP0869519B1 (en) Planar magnetic motor and magnetic microactuator with such a motor
EP0992658B1 (en) Electromagnetic valve actuator
EP0974185B1 (en) Improved linear actuator
EP0829129B1 (en) Electromagnetic actuator magnetically locked into two or more stable positions
EP2792057B1 (en) Electromagnetic actuator
EP1185995B1 (en) On/off control device especially for a disconnection device such as a circuit breaker and circuit breaker fitter with said device.
EP1174595A1 (en) Valve actuator for internal combustion engine
EP1450011B1 (en) Electromagnetic valve actuator for internal combustion engine and engine comprising such an actuator
EP0886875B1 (en) Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same
EP1450013B1 (en) Electromagnetic valve actuator for internal combustion engine and engine comprising such an actuator
CA3197790A1 (en) Bistable electromagnetic actuator and aircraft brake valve provided with such an actuator
EP3939151B1 (en) Electromagnetic device
EP0042884A1 (en) Electromagnetically excited magnet motor
EP3729618B1 (en) Actuator with open-loop control direct drive
EP0419352B1 (en) Electromagnetic valve with permanent magnet
WO2024115606A1 (en) Compact two-phase motor
EP0661794B1 (en) Cylindrical electromechanical transducer
EP1298776A1 (en) Rotary actuator
FR2799302A1 (en) ELECTRIC ACTUATOR IN PARTICULAR FOR A MOTOR VEHICLE ENGINE VALVE
FR2756660A1 (en) Electromagnetic actuator for limited movement rotation mechanism
FR2848739A1 (en) Rotary driving device for assisting gas exhausting turbocharger, has stator with driving modules for creating magnetic field in variable intensity according to direction parallel to axis of rotation of rotor with passage zone
WO2013132329A1 (en) Electromagnetic actuator

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

17P Request for examination filed

Effective date: 19980710

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 19991006

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69738708

Country of ref document: DE

Date of ref document: 20080703

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ABREMA AGENCE BREVET ET MARQUES, GANGUILLET

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080901

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080821

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081021

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

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

Effective date: 20090224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090131

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080521

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090116

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 NON-PAYMENT OF DUE FEES

Effective date: 20090116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080822

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090116

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20151217

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20151222

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: 20151217

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69738708

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL