WO1997026667A1 - 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 Download PDFInfo
- Publication number
- WO1997026667A1 WO1997026667A1 PCT/FR1997/000080 FR9700080W WO9726667A1 WO 1997026667 A1 WO1997026667 A1 WO 1997026667A1 FR 9700080 W FR9700080 W FR 9700080W WO 9726667 A1 WO9726667 A1 WO 9726667A1
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- WO
- WIPO (PCT)
- 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.)
- Ceased
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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)
- Electromagnets (AREA)
- Magnetically Actuated Valves (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
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
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69738708T DE69738708D1 (en) | 1996-01-17 | 1997-01-16 | SINGLE PHASE ELECTROMAGNETIC ROTATING ACTUATOR WITH MAGNETIC SPRING AND ELECTRIC VALVE WITH SUCH A SENSOR |
| JP9508717A JP2000503165A (en) | 1996-01-17 | 1997-01-16 | Magnetic spring type rotating single-phase electromagnetic actuator and electric valve using such actuator |
| EP97900660A EP0886875B1 (en) | 1996-01-17 | 1997-01-16 | Rotatable single-phase electromagnetic actuator with a magnetic spring, and electrically operated valve using same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR96/00496 | 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997026667A1 true WO1997026667A1 (en) | 1997-07-24 |
Family
ID=9488188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1997/000080 Ceased WO1997026667A1 (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) |
Families Citing this family (4)
| 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 |
| FR3038772B1 (en) | 2015-07-07 | 2017-08-11 | Mmt Sa | ELECTROMAGNETIC ACTUATOR WITH DIRECT DRIVE. |
| CN109764221B (en) * | 2017-08-31 | 2021-04-27 | 北京影谱科技股份有限公司 | Cloud platform |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186501A2 (en) * | 1984-12-21 | 1986-07-02 | Pneumo Abex Corporation | Limited angle torque motor with high stiffness and natural frequency |
| DE3908545A1 (en) * | 1989-03-16 | 1990-09-27 | Vdo Schindling | Adjustment drive for a throttle of an internal combustion engine |
| WO1992011686A1 (en) * | 1990-12-17 | 1992-07-09 | Moving Magnet Technologies S.A. | Rotatable single-phase electromagnetic actuator |
| EP0543105A1 (en) * | 1991-11-21 | 1993-05-26 | Harmonic Drive Systems Inc. | Electromagnetic motor of the finite rotational type |
| EP0558362A1 (en) * | 1992-02-28 | 1993-09-01 | Moving Magnet Technologies S.A. | Monophase electromagnetic rotary actuator with a movement between 60 and 120 degrees |
| EP0592083A1 (en) * | 1992-10-08 | 1994-04-13 | Lucas Industries, Inc. | Permanent magnet brushless torque actuator |
-
1996
- 1996-01-17 FR FR9600496A patent/FR2744559B1/en not_active Expired - Fee Related
-
1997
- 1997-01-16 EP EP97900660A patent/EP0886875B1/en not_active Expired - Lifetime
- 1997-01-16 AT AT97900660T patent/ATE396486T1/en not_active IP Right Cessation
- 1997-01-16 JP JP9508717A patent/JP2000503165A/en active Pending
- 1997-01-16 DE DE69738708T patent/DE69738708D1/en not_active Expired - Lifetime
- 1997-01-16 WO PCT/FR1997/000080 patent/WO1997026667A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186501A2 (en) * | 1984-12-21 | 1986-07-02 | Pneumo Abex Corporation | Limited angle torque motor with high stiffness and natural frequency |
| DE3908545A1 (en) * | 1989-03-16 | 1990-09-27 | Vdo Schindling | Adjustment drive for a throttle of an internal combustion engine |
| WO1992011686A1 (en) * | 1990-12-17 | 1992-07-09 | Moving Magnet Technologies S.A. | Rotatable single-phase electromagnetic actuator |
| EP0543105A1 (en) * | 1991-11-21 | 1993-05-26 | Harmonic Drive Systems Inc. | Electromagnetic motor of the finite rotational type |
| EP0558362A1 (en) * | 1992-02-28 | 1993-09-01 | Moving Magnet Technologies S.A. | Monophase electromagnetic rotary actuator with a movement between 60 and 120 degrees |
| EP0592083A1 (en) * | 1992-10-08 | 1994-04-13 | Lucas Industries, Inc. | Permanent magnet brushless torque actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2744559A1 (en) | 1997-08-08 |
| DE69738708D1 (en) | 2008-07-03 |
| EP0886875A1 (en) | 1998-12-30 |
| EP0886875B1 (en) | 2008-05-21 |
| FR2744559B1 (en) | 1998-04-10 |
| JP2000503165A (en) | 2000-03-14 |
| ATE396486T1 (en) | 2008-06-15 |
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