WO1993014553A1 - Reciprocating motor device - Google Patents

Reciprocating motor device Download PDF

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Publication number
WO1993014553A1
WO1993014553A1 PCT/CH1993/000004 CH9300004W WO9314553A1 WO 1993014553 A1 WO1993014553 A1 WO 1993014553A1 CH 9300004 W CH9300004 W CH 9300004W WO 9314553 A1 WO9314553 A1 WO 9314553A1
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WO
WIPO (PCT)
Prior art keywords
motor
integral
motor device
motors
movable
Prior art date
Application number
PCT/CH1993/000004
Other languages
French (fr)
Inventor
Georges Magnin
Erich Jucker
Original Assignee
Georges Magnin
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 Georges Magnin filed Critical Georges Magnin
Publication of WO1993014553A1 publication Critical patent/WO1993014553A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H02K33/10—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/065—Electromechanical oscillators; Vibrating magnetic drives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor

Definitions

  • the subject of the present invention is a reciprocating motor device which comprises an electromagnetic motor with a movable permanent magnet, this magnet having two parallel flat surfaces, spaced apart by a distance substantially less than the dimensions of the magnet in these surfaces, the magnet having, on at least one of said flat surfaces, at least one series of poles of the same sign and being mounted so that said poles are displaceable in air gaps of corresponding magnetic circuits forming part of a motor stator, these magnetic circuits being coupled with at least one excitation coil connected to a supply device supplying a pulse or sinusoidal excitation current, the magnet being integral with a movable member subjected to an elastic restoring force, so that the movable member is driven, at least in a first direction, under the effect of a pulse or a wave portion of the excitation current one, from a rest position towards a position of maximum displacement, against said restoring force, and that it returns, under the effect of another pulse or portion of wave of the excitation current and / or said restoring force, towards the rest position.
  • the motor device according to the invention can be used, for example, for a medical plaster saw, for a low pressure and high flow pump, for a vibrating system used for automatic loading of parts. microtechnology or the dosing and transport of powdery materials, as well as for many other applications.
  • the device according to the invention comprises two motors acting on the same movable member and working in phase opposition.
  • the motor device comprises a device for detecting the position and / or the speed of the movable member, this device supplying a detection signal to the supply device for controlling the amplitude and / or the duration of the pulses or wave portions of the excitation current.
  • the movable member may comprise or be integral with at least one magnetized part cooperating with at least one magnetic field detector to detect the position and / or the speed of the movable member.
  • the motor of the device according to the invention is a rotary motor comprising a disc magnetized in the axial direction, along at least one annular zone, said magnetic circuits each comprising at least one stacking of U-shaped sheets, all of the circuits being coupled with at least one coil arranged coaxially with respect to the axis of the disc.
  • the movable member may be secured to one end of at least one leaf spring inclined relative to the direction of the axis of the magnetic disc , the other end of the leaf spring being integral with a load part movable angularly and axially with respect to the stator of the motor.
  • the mobile unit can also be coupled with. a part of charge so as to confer. to it an essentially linear movement.
  • Fig. 1 is a view partially in axial section of an oscillating motor device with two rotary motors
  • Fig. 2 is a cross section along the line II-II of FIG. 1;
  • Fig. 3 is a cross section along the line III-III of FIG. 1, without the rotary member;
  • Fig. 4 is an axial section view of a vibrating device using a rotary motor
  • Fig. 5 is a view partially in axial section, in a plane perpendicular to that of FIG. 4;
  • Fig. 6 is a sectional view along the line VI-VI of FIG. 5.
  • Fig. 7 is a schematic side view of a motor device with linear oscillating movement.
  • the motor device comprises two rotary motor assemblies 1, 2 arranged coaxially.
  • the motor assembly 1 the structure of which is visible in FIGS. 1 and 3, comprises a stator in two juxtaposed parts 3 and 4, into which are inserted a series of magnetic circuits such as 5, constituted by stacks of magnetically permeable sheets, essentially U-shaped, such as 6 and 7, one of the ends of the branches of each U being in magnetic contact along a surface 8, the other two ends 9 and 10 forming an air gap of the circuit 5.
  • the various magnetic circuits 5 are arranged radially with respect to the shaft 11 of the motor assembly 1, and have, between them, equal angular distances.
  • Electric coils cylindrical 12 and 13 are housed coaxially inside the spaces between the branches of the U of the magnetic circuits and are thus coupled with all of these circuits.
  • a rotary member 14 of the motor assembly comprises a magnetic thin disc 15, a peripheral zone of which extends inside the air gaps of the magnetic circuits 5.
  • This annular zone is • axially magnetized, so as to present a series of poles magnetic, alternately positive and negative, on each side of the disc.
  • These different magnetized portions cooperate, in a known manner, with the magnetic circuits 5, so as to create a driving torque of the rotary member under the effect of an excitation current flowing through the coils 12 and 13.
  • This excitation current is supplied by a supply device, not shown, and can be in the form of pulses or, preferably, of a sinusoidal current having, for example, a frequency of the order of 300 Hz. Under the effect of such an alternating excitation current, or of wave portions of such a current or of suitable current pulses, the movable member is caused to perform an alternating movement of limited amplitude between a rest position and a maximum displacement position.
  • the rotary member 14 is integral with the shaft 1 1 of the motor assembly, itself integral with the end 16 of a torsion bar 17, housed inside the shaft 11 and whose another end 18 is fixed in a support part 19.
  • This support part is angularly guided by spring blades 20 and 21 in a housing 22 of the device.
  • the motor assembly 2 is arranged in a completely similar manner to the assembly 1 and works on a torsion bar 23, one end of which is integral with the support part 19.
  • This motor assembly 2 is supplied in phase opposition with respect to the motor assembly 1, from the same supply device, not shown.
  • the shaft 11 of the motor assembly 1 can be connected to the load, such as a saw disc, while the output shaft 24 of the motor assembly 2 preferably carries a dimensioned balancing weight so as to compensate for the inertia of the load.
  • a device for detecting the angular position and / or the speed of rotation of the shaft 11 is arranged so as to control the amplitude and / or the duration of the pulses or wave portions of the current d excitation provided by the supply device.
  • the movement of the shafts 11 and 24 is an oscillating movement, in opposite directions, which, in one of the respective directions, will arm the corresponding torsion bars 17 and 23 and, in the opposite direction, will provide an increased torque due to the restitution of the energy stored in the respective torsion bars during the previous movement.
  • the whole oscillating motor device thus appears, from the outside, practically as dynamically balanced and therefore devoid of vibrations.
  • FIGS. 4 to 6 show another embodiment of a motor device with oscillating movement, intended for the application for a vibrator, for example for the loading of microtechnical pieces placed in a bowl 30.
  • This device comprises a motor assembly 31 similar to that described in FIGS. 1 and 3, housed in a vertical housing 32.
  • the rotary member 34 of this motor assembly is integral with a transmission part 35, itself connected to a solid part 36 of the bowl 30, by means of spring blades such as 37, the ends of which are fixed, respectively, on the parts 35 and 36.
  • the spring blades 37 for example four in number, are inclined relative to the direction of the axis of the motor and will thus be armed, in a direction of oscillating movement, to restore their energy during movement in the opposite direction of the rotating member of the motor.
  • these blades 37 drive the bowl 30 in an oscillating rotary and axial movement relative to the housing 32, the device thus constituting a real vibrator.
  • one end of a shaft 38 of the motor device carries a magnetic disc 39 acting on magnetic field detectors such as Hall probes arranged in a support 40 facing this disc, for continuously detecting the angular position of the rotary member and thus making it possible to control, in an appropriate manner, the amplitude and / or the frequency of repetition of the pulses or portions of wave of the current excitation to be supplied to the motor device.
  • the end of the shaft 38 is angularly guided by two blades of low rigidity 41 and 42, while a screw 43, integral with this same end of the shaft 38, is housed in a slot 44 and serves as a member stop to prevent excessive angular displacement of the movable member.
  • Fig. 7 schematically shows a vibrating device with linear oscillating movement, using a rotary motor similar to the motors of the examples according to FIGS. 1 and 4.
  • the stator 45 of the motor shown symbolically in FIG. 7, is mounted on a frame 46 above which a vibrating plate 47 is disposed. This plate is supported by spring blades such as 48, 49, one end of which is integral with the frame 46 and the other end of which is fixed to the tray 47.
  • the movable member of the motor is coupled to the plate 47 by means of a plate 50, mounted radially relative to the axis of the motor, the free end of this plate being engaged in a slot between two parts 51, 52 secured to the tray and provided on the side of the slot with respective elastic cushions 53, 54.
  • the rotary oscillating movement of the motor is thus transformed into a mainly linear vibration movement but with a component perpendicular to the plate, the amplitude of which depends on the inclination of the blades 48, 49.
  • Linear operation can also be achieved by means of a linear motor with a multipolar moving magnet of the same type as the above-mentioned rotary motors.

Abstract

A device comprising an electromagnetic motor with a moving permanent magnet (15) having two plane parallel surfaces on at least one of which at least one series of poles with identical signs is provided. The poles are movable in the air gaps of corresponding magnetic circuits (5) which form part of a motor stator and are coupled to at least one field coil (12) receiving a pulsed or sinusoidal energizing current. The magnet (15) is rigidly connected to a movable component (11, 14) which is subjected to a resilient return force and urged by an energizing current pulse, against said return force, from a rest position to a maximum travel position, whereafter it is returned to the rest position by another energizing current pulse and/or said return force. The device is particularly useful in medical saws, pumps and transporting and loading vibrators.

Description

DISPOSITIF MOTEUR A MOUVEMENT ALTERNATIFAVAILABLE IFIT S ENGINE RECIPROCATING
La présente invention a pour objet un dispositif moteur à mouvement alternatif qui comporte un moteur électromagnétique à aimant permanent mobile, cet aimant ayant deux surfaces planes parallèles, espacées d'une distance sensiblement inférieure aux dimensions de l'aimant dans ces surfaces, l'aimant présentant, sur au moins une desdites surfaces planes, au moins une série de pôles de même signe et étant monté de façon que lesdits pôles soient déplaçables dans des entrefers de circuits magnétiques correspondants faisant partie d'un stator du moteur, ces circuits magnétiques étant couplés avec au moins une bobine d'excitation connectée à un dispositif d'alimentation fournissant un courant d'excitation impulsionnel ou sinusoïdal, l'aimant étant solidaire d'un organe mobile soumis à une force de rappel élastique, de façon que l'organe mobile soit entraîné, au moins dans un premier sens, sous l'effet d'une impulsion ou d'une portion d'onde du courant d'excitation, depuis une position de repos vers une position de déplacement maximal, contre ladite force de rappel, et qu'il revienne, sous l'effet d'une autre impulsion ou portion d'onde du courant d'excitation et/ou de ladite force de rappel, vers la position de repos.The subject of the present invention is a reciprocating motor device which comprises an electromagnetic motor with a movable permanent magnet, this magnet having two parallel flat surfaces, spaced apart by a distance substantially less than the dimensions of the magnet in these surfaces, the magnet having, on at least one of said flat surfaces, at least one series of poles of the same sign and being mounted so that said poles are displaceable in air gaps of corresponding magnetic circuits forming part of a motor stator, these magnetic circuits being coupled with at least one excitation coil connected to a supply device supplying a pulse or sinusoidal excitation current, the magnet being integral with a movable member subjected to an elastic restoring force, so that the movable member is driven, at least in a first direction, under the effect of a pulse or a wave portion of the excitation current one, from a rest position towards a position of maximum displacement, against said restoring force, and that it returns, under the effect of another pulse or portion of wave of the excitation current and / or said restoring force, towards the rest position.
Dans de nombreux domaines, il est nécessaire ou souhaitable de pouvoir produire un mouvement alternatif, et notamment un mouvement oscillatoire, soit rotatif, soit linéaire, d'une manière contrôlable avec précision et parfaitement adaptable à une application donnée. On souhaite, d'autre part, disposer d'un tel dispositif moteur qui présente un rapport optimal couple/encombrement et qui soit d'une structure économique et fiable.In many fields, it is necessary or desirable to be able to produce an alternating movement, and in particular an oscillatory movement, either rotary or linear, in a manner which can be controlled with precision and which is perfectly adaptable to a given application. On the other hand, it is desired to have such a drive device which has an optimal torque / size ratio and which is of an economical and reliable structure.
Ces objectifs peuvent être atteints par le dispositif moteur selon l'invention, qui peut être utilisé, par exemple, pour une scie à plâtre médicale, pour une pompe de faible pression et de grand débit, pour un système vibrant servant au chargement automatique de pièces microtechniques ou au dosage et au transport de matériaux pulvérulents, ainsi que pour de nombreuses autres applications.These objectives can be achieved by the motor device according to the invention, which can be used, for example, for a medical plaster saw, for a low pressure and high flow pump, for a vibrating system used for automatic loading of parts. microtechnology or the dosing and transport of powdery materials, as well as for many other applications.
Selon une forme d'exécution, le dispositif selon l'invention
Figure imgf000004_0001
comporte deux moteurs agissant sur le même organe mobile et travaillant en opposition de phase.According to one embodiment, the device according to the invention
Figure imgf000004_0001
comprises two motors acting on the same movable member and working in phase opposition.
De préférence, le dispositif moteur selon l'invention comporte un dispositif de détection de la position et/ou de la vitesse de l'organe mobile, ce dispositif fournissant un signal de détection au dispositif d'alimentation pour commander l'amplitude et/ou la durée des impulsions ou des portions d'onde du courant d'excitation. En particulier, l'organe mobile peut comporter ou être solidaire d'au moins une partie aimantée coopérant avec au moins un détecteur de champ magnétique pour détecter la position etfou la vitesse de l'organe mobile.Preferably, the motor device according to the invention comprises a device for detecting the position and / or the speed of the movable member, this device supplying a detection signal to the supply device for controlling the amplitude and / or the duration of the pulses or wave portions of the excitation current. In particular, the movable member may comprise or be integral with at least one magnetized part cooperating with at least one magnetic field detector to detect the position and / or the speed of the movable member.
Selon une forme d'exécution particulièrement avantageuse, le moteur du dispositif selon l'invention est un moteur rotatif comportant un disque aimanté dans le sens axial, le long d'au moins une zone annulaire, lesdits circuits magnétiques comportant, chacun, au moins un empilage de tôles en forme de U, l'ensemble des circuits étant couplé avec au moins une bobine disposée coaxialement par rapport à l'axe du disque.According to a particularly advantageous embodiment, the motor of the device according to the invention is a rotary motor comprising a disc magnetized in the axial direction, along at least one annular zone, said magnetic circuits each comprising at least one stacking of U-shaped sheets, all of the circuits being coupled with at least one coil arranged coaxially with respect to the axis of the disc.
Plus particulièrement, dans une application du dispositif moteur pour l'actionnement d'un dispositif vibreur, l'organe mobile peut être solidaire d'une extrémité d'au moins une lame ressort inclinée par rapport à la direction de l'axe du disque aimanté, l'autre extrémité de la lame ressort étant solidaire d'une partie de charge déplaçable angulairement et axialement par rapport au stator du moteur. LOrgane mobile peut également être couplé avec . une partie de charge de manière à conférer . à celle-ci un mouvement essentiellement linéaire.More particularly, in an application of the motor device for actuating a vibrating device, the movable member may be secured to one end of at least one leaf spring inclined relative to the direction of the axis of the magnetic disc , the other end of the leaf spring being integral with a load part movable angularly and axially with respect to the stator of the motor. The mobile unit can also be coupled with. a part of charge so as to confer. to it an essentially linear movement.
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront plus clairement à la lumière de la description suivante de deux formes de réalisation, indiquées à titre d'exemples et illustrées dans le dessin annexé, dans lequel:Other characteristics, objects and advantages of the present invention will become more clearly apparent in the light of the following description of two embodiments, indicated by way of examples and illustrated in the appended drawing, in which:
La Fig. 1 est une vue partiellement en coupe axiale d'un dispositif moteur oscillant à deux moteurs rotatifs;Fig. 1 is a view partially in axial section of an oscillating motor device with two rotary motors;
La Fig. 2 est une coupe transversale le long de la ligne ll-ll de la Fig. 1 ;Fig. 2 is a cross section along the line II-II of FIG. 1;
La Fig. 3 est une coupe transversale le long de la ligne lll-III de la Fig. 1 , sans l'organe rotatif;Fig. 3 is a cross section along the line III-III of FIG. 1, without the rotary member;
La Fig. 4 est une vue en coupe axiale d'un dispositif vibreur utilisant un moteur rotatif;Fig. 4 is an axial section view of a vibrating device using a rotary motor;
La Fig. 5 est une vue partiellement en coupe axiale, dans un plan perpendiculaire à celui de la Fig. 4; etFig. 5 is a view partially in axial section, in a plane perpendicular to that of FIG. 4; and
La Fig. 6 est une vue en coupe selon la ligne VI-VI de la Fig. 5.Fig. 6 is a sectional view along the line VI-VI of FIG. 5.
La Fig. 7 est une vue latérale schématique d'un dispositif moteur à mouvement oscillant linéaire.Fig. 7 is a schematic side view of a motor device with linear oscillating movement.
Le dispositif moteur selon la Fig. 1 comporte deux ensembles moteur rotatif 1 ,2 disposés coaxialement. L'ensemble moteur 1 , dont la structure est visible aux Figures 1 et 3, comporte un stator en deux parties juxtaposées 3 et 4, dans lesquelles sont insérés une série de circuits magnétiques tels que 5, constitués par des empilages de tôles magnétiquement perméables, essentiellement en forme de U, telles que 6 et 7, l'une des extrémités des branches de chaque U étant en contact magnétique le long d'une surface 8, les deux autres extrémités 9 et 10 formant un entrefer du circuit 5.The motor device according to FIG. 1 comprises two rotary motor assemblies 1, 2 arranged coaxially. The motor assembly 1, the structure of which is visible in FIGS. 1 and 3, comprises a stator in two juxtaposed parts 3 and 4, into which are inserted a series of magnetic circuits such as 5, constituted by stacks of magnetically permeable sheets, essentially U-shaped, such as 6 and 7, one of the ends of the branches of each U being in magnetic contact along a surface 8, the other two ends 9 and 10 forming an air gap of the circuit 5.
Les différents circuits magnétiques 5 sont disposés radialement par rapport à l'arbre 1 1 de l'ensemble moteur 1 , et présentent, entre eux, des distances angulaires égales. Des bobines électriques cylindriques 12 et 13 sont logées coaxialement à l'intérieur des espaces entre les branches des U des circuits magnétiques et sont ainsi couplées avec l'ensemble de ces circuits.The various magnetic circuits 5 are arranged radially with respect to the shaft 11 of the motor assembly 1, and have, between them, equal angular distances. Electric coils cylindrical 12 and 13 are housed coaxially inside the spaces between the branches of the U of the magnetic circuits and are thus coupled with all of these circuits.
Un organe rotatif 14 de l'ensemble moteur comporte un disque mince aimanté 15, dont une zone périphérique s'étend à l'intérieur des entrefers des circuits magnétiques 5. Cette zone annulaire est • aimantée axialement, de façon à présenter une série de pôles magnétiques, alternativement positifs et négatifs, sur chacune des faces du disque. Ces différentes portions aimantées coopèrent, d'une manière connue, avec les circuits magnétiques 5, de façon à créer un couple d'entraînement de l'organe rotatif sous l'effet d'un courant d'excitation parcourant les bobines 12 et 13. Ce courant d'excitation est fourni par un dispositif d'alimentation, non représenté, et peut avoir la forme d'impulsions ou, de préférence, d'un courant sinusoïdal ayant, par exemple, une fréquence de l'ordre de 300 Hz. Sous l'effet d'un tel courant d'excitation alternatif, ou de portions d'onde d'un tel courant ou d'impulsions de courant appropriées, l'organe mobile est amené à effectuer un mouvement alternatif d'amplitude limitée entre une position de repos et une position de déplacement maximal.A rotary member 14 of the motor assembly comprises a magnetic thin disc 15, a peripheral zone of which extends inside the air gaps of the magnetic circuits 5. This annular zone is • axially magnetized, so as to present a series of poles magnetic, alternately positive and negative, on each side of the disc. These different magnetized portions cooperate, in a known manner, with the magnetic circuits 5, so as to create a driving torque of the rotary member under the effect of an excitation current flowing through the coils 12 and 13. This excitation current is supplied by a supply device, not shown, and can be in the form of pulses or, preferably, of a sinusoidal current having, for example, a frequency of the order of 300 Hz. Under the effect of such an alternating excitation current, or of wave portions of such a current or of suitable current pulses, the movable member is caused to perform an alternating movement of limited amplitude between a rest position and a maximum displacement position.
L'organe rotatif 14 est solidaire de l'arbre 1 1 de l'ensemble moteur, lui-même solidaire de l'extrémité 16 d'une barre de torsion 17, logée à l'intérieur de l'arbre 11 et dont l'autre extrémité 18 est fixée dans une partie de support 19. Cette partie de support est guidée angulairement par des lames ressort 20 et 21 dans un boîtier 22 du dispositif.The rotary member 14 is integral with the shaft 1 1 of the motor assembly, itself integral with the end 16 of a torsion bar 17, housed inside the shaft 11 and whose another end 18 is fixed in a support part 19. This support part is angularly guided by spring blades 20 and 21 in a housing 22 of the device.
L'ensemble moteur 2 est agencé de façon tout à fait similaire à l'ensemble 1 et travaille sur une barre de torsion 23, dont une extrémité est solidaire de la partie de support 19.The motor assembly 2 is arranged in a completely similar manner to the assembly 1 and works on a torsion bar 23, one end of which is integral with the support part 19.
Cet ensemble moteur 2 est alimenté en opposition de phase par rapport à l'ensemble moteur 1 , à partir du même dispositif d'alimentation, non représenté. L'arbre 11 de l'ensemble moteur 1 peut être connecté à la charge, tel qu'un disque de scie, alors que l'arbre de sortie 24 de l'ensemble moteur 2 porte, de préférence, une masse d'équilibrage dimensionnée de façon à compenser l'inertie de la charge. D'autre part, un dispositif de détection de la position angulaire et/ou de la vitesse de rotation de l'arbre 11 est agencé de façon à commander l'amplitude et/ou la durée des impulsions ou portions d'onde du courant d'excitation fournies par le dispositif d'alimentation.This motor assembly 2 is supplied in phase opposition with respect to the motor assembly 1, from the same supply device, not shown. The shaft 11 of the motor assembly 1 can be connected to the load, such as a saw disc, while the output shaft 24 of the motor assembly 2 preferably carries a dimensioned balancing weight so as to compensate for the inertia of the load. On the other hand, a device for detecting the angular position and / or the speed of rotation of the shaft 11 is arranged so as to control the amplitude and / or the duration of the pulses or wave portions of the current d excitation provided by the supply device.
Le mouvement des arbres 11 et 24 est un mouvement oscillant, en sens opposés, qui, dans un des sens respectifs, va armer les barres de torsion correspondantes 17 et 23 et, dans le sens opposé, fournira un couple accru du fait de la restitution de l'énergie emmagasinée dans les barres de torsion respectives lors du mouvement précédent. L'ensemble du dispositif moteur oscillant se présente ainsi, de l'extérieur, pratiquement comme équilibré dynamiquement et donc dépourvu de vibrations.The movement of the shafts 11 and 24 is an oscillating movement, in opposite directions, which, in one of the respective directions, will arm the corresponding torsion bars 17 and 23 and, in the opposite direction, will provide an increased torque due to the restitution of the energy stored in the respective torsion bars during the previous movement. The whole oscillating motor device thus appears, from the outside, practically as dynamically balanced and therefore devoid of vibrations.
La régulation mentionnée du courant d'excitation des ensembles moteurs par l'intermédiaire de la détection de la position angulaire de l'arbre 1 1 permet, par exemple, de maintenir constante l'amplitude d'oscillation lors de variations du couple dé charge.The aforementioned regulation of the excitation current of the motor assemblies by means of the detection of the angular position of the shaft 11 makes it possible, for example, to keep the amplitude of oscillation constant during variations in the load torque.
Les Figures 4 à 6 montrent une autre forme de réalisation d'un dispositif moteur à mouvement oscillant, destiné à l'application pour un vibreur, par exemple pour le chargement de pièces de microtechnique placées dans un bol 30.FIGS. 4 to 6 show another embodiment of a motor device with oscillating movement, intended for the application for a vibrator, for example for the loading of microtechnical pieces placed in a bowl 30.
Ce dispositif comporte un ensemble moteur 31 similaire à celui décrit aux Figures 1 et 3, logé dans un boîtier vertical 32. LOrgane rotatif 34 de cet ensemble moteur est solidaire d'une pièce de transmission 35, elle-même reliée à une pièce 36 solidaire du bol 30, par l'intermédiaire de lames ressort telles que 37, dont les extrémités sont fixées, respectivement, sur les pièces 35 et 36. Les lames ressort 37, par exemple au nombre de quatre, sont inclinées par rapport à la direction de l'axe du moteur et seront ainsi armées, dans un sens du mouvement oscillant, pour restituer leur énergie lors du mouvement dans le sens opposé de l'organe rotatif du moteur. En même temps, ces lames 37 entraînent le bol 30 dans un mouvement oscillant rotatif et axial par rapport au boîtier 32, le dispositif constituant ainsi un véritable vibreur. ' This device comprises a motor assembly 31 similar to that described in FIGS. 1 and 3, housed in a vertical housing 32. The rotary member 34 of this motor assembly is integral with a transmission part 35, itself connected to a solid part 36 of the bowl 30, by means of spring blades such as 37, the ends of which are fixed, respectively, on the parts 35 and 36. The spring blades 37, for example four in number, are inclined relative to the direction of the axis of the motor and will thus be armed, in a direction of oscillating movement, to restore their energy during movement in the opposite direction of the rotating member of the motor. At the same time, these blades 37 drive the bowl 30 in an oscillating rotary and axial movement relative to the housing 32, the device thus constituting a real vibrator. '
Dans la forme d'exécution selon les Figures 4 à 6, une extrémité d'un arbre 38 du dispositif moteur porte un disque aimanté 39 agissant sur des détecteurs de champ magnétique tels que des sondes de Hall disposées dans un support 40 en regard de ce disque, pour détecter, de façon continue, la position angulaire de l'organe rotatif et permettre ainsi de commander, d'une manière appropriée, l'amplitude et/ou la fréquence de répétition des impulsions ou portions d'onde du courant d'excitation à fournir au dispositif moteur. L'extrémité de l'arbre 38 est guidée angulairement par deux lames de faible rigidité 41 et 42, alors qu'une vis 43, solidaire de cette même extrémité de l'arbre 38, est logée dans une fente 44 et sert d'organe de butée pour empêcher un déplacement angulaire excessif de l'organe mobile.In the embodiment according to FIGS. 4 to 6, one end of a shaft 38 of the motor device carries a magnetic disc 39 acting on magnetic field detectors such as Hall probes arranged in a support 40 facing this disc, for continuously detecting the angular position of the rotary member and thus making it possible to control, in an appropriate manner, the amplitude and / or the frequency of repetition of the pulses or portions of wave of the current excitation to be supplied to the motor device. The end of the shaft 38 is angularly guided by two blades of low rigidity 41 and 42, while a screw 43, integral with this same end of the shaft 38, is housed in a slot 44 and serves as a member stop to prevent excessive angular displacement of the movable member.
La Fig. 7 montre, de façon schématique, un dispositif vibreur à mouvement oscillant linéaire, utilisant un moteur rotatif similaire aux moteurs des exemples selon les Figures 1 et 4. Le stator 45 du moteur représenté symboliquement à la Fig. 7, est monté sur un châssis 46 au-dessus duquel est disposé un plateau vibrant 47. Ce plateau est supporté par des lames ressort telles que 48, 49, dont une extrémité est solidaire du châssis 46 et dont l'autre extrémité est fixée au plateau 47.Fig. 7 schematically shows a vibrating device with linear oscillating movement, using a rotary motor similar to the motors of the examples according to FIGS. 1 and 4. The stator 45 of the motor shown symbolically in FIG. 7, is mounted on a frame 46 above which a vibrating plate 47 is disposed. This plate is supported by spring blades such as 48, 49, one end of which is integral with the frame 46 and the other end of which is fixed to the tray 47.
LOrgane mobile du moteur est couplé au plateau 47 par l'intermédiaire d'une plaquette 50, montée radialement par rapport à l'axe du moteur, l'extrémité libre de cette plaquette étant engagée dans une fente entre deux pièces 51 , 52 solidaires du plateau et munies du côté de la fente de coussins élastiques respectifs 53, 54.The movable member of the motor is coupled to the plate 47 by means of a plate 50, mounted radially relative to the axis of the motor, the free end of this plate being engaged in a slot between two parts 51, 52 secured to the tray and provided on the side of the slot with respective elastic cushions 53, 54.
Le mouvement oscillant rotatif du moteur est ainsi transformé en un mouvement de vibration principalement linéaire mais avec une composante perpendiculaire au plateau, dont l'amplitude dépend de l'inclinaison des lames 48, 49.The rotary oscillating movement of the motor is thus transformed into a mainly linear vibration movement but with a component perpendicular to the plate, the amplitude of which depends on the inclination of the blades 48, 49.
Un fonctionnement linéaire peut également être réalisé au moyen d'un moteur linéaire à aimant mobile multipolaire du même type que les moteurs rotatifs susmentionnés.Linear operation can also be achieved by means of a linear motor with a multipolar moving magnet of the same type as the above-mentioned rotary motors.
Toutes les réalisations indiquées ici ne sont d'ailleurs, bien entendu, que des exemples nullement limitatifs de mise en oeuvre et d'application du présent dispositif. All the embodiments indicated here are, moreover, of course, only non-limiting examples of implementation and application of the present device.

Claims

RFVFNDICATIONS RFVFNDICATIONS
1. Dispositif moteur à mouvement alternatif, caractérisé en ce qu'il comporte un moteur électromagnétique à aimant permanent mobile (15), cet aimant ayant deux surfaces planes parallèles, espacées d'une distance sensiblement inférieure aux dimensions de l'aimant dans ces surfaces, l'aimant (15) présentant, sur au moins une desdites surfaces planes, au moins une série de pôles de même signe et étant monté de façon que lesdits pôles soient déplaçables dans des entrefers de circuits magnétiques (5) correspondants faisant partie d'un stator du moteur, ces circuits magnétiques étant couplés avec au moins une bobine d'excitation (12) connectée à un dispositif d'alimentation fournissant un courant d'excitation impulsionnel ou sinusoïdal, l'aimant (15) étant solidaire d'un organe mobile (11 ,14) soumis à une force de rappel élastique, de façon que l'organe mobile (11 ,14) soit entraîné, au moins dans un premier sens, sous l'effet d'une impulsion ou d'une portion d'onde du courant d'excitation, depuis une position de repos vers une position de déplacement maximal, contre ladite force de rappel, et qu'il revienne, sous l'effet d'une autre impulsion ou portion d'onde du courant d'excitation et/ou de ladite force de rappel, vers la position de repos.1. A reciprocating motor device, characterized in that it comprises an electromagnetic motor with a movable permanent magnet (15), this magnet having two parallel flat surfaces, spaced apart by a distance substantially less than the dimensions of the magnet in these surfaces , the magnet (15) having, on at least one of said flat surfaces, at least one series of poles of the same sign and being mounted so that said poles are movable in air gaps of corresponding magnetic circuits (5) forming part of a motor stator, these magnetic circuits being coupled with at least one excitation coil (12) connected to a supply device supplying a pulse or sinusoidal excitation current, the magnet (15) being integral with a member mobile (11, 14) subjected to an elastic restoring force, so that the mobile member (11, 14) is driven, at least in a first direction, under the effect of an impulse or a portion wave of the excitation current, from a rest position to a position of maximum displacement, against said restoring force, and that it returns, under the effect of another pulse or portion of wave of the current d 'excitation and / or said restoring force, towards the rest position.
2. Dispositif moteur selon la revendication 1 , caractérisé en ce qu'il comporte deux moteurs (1 ,2) agissant sur le même organe mobile et travaillant en opposition de phase.2. Motor device according to claim 1, characterized in that it comprises two motors (1, 2) acting on the same movable member and working in phase opposition.
3. Dispositif moteur selon l'une des revendications 1 ou 2, caractérisé en ce qu'il comporte un dispositif de détection de la position et/ou de la vitesse de l'organe mobile (34), ce dispositif fournissant un signal de détection au dispositif d'alimentation pour commander l'amplitude et/ou la durée des impulsions ou des portions d'onde du courant d'excitation..3. Motor device according to one of claims 1 or 2, characterized in that it comprises a device for detecting the position and / or the speed of the movable member (34), this device providing a detection signal to the supply device for controlling the amplitude and / or the duration of the pulses or of the wave portions of the excitation current.
4. Dispositif moteur selon la revendication 3, caractérisé en ce que l'organe mobile (34) comporte ou est solidaire d'au moins une partie aimantée (39) coopérant avec au moins un détecteur de champ magnétique (dans 40) pour détecter la position et/ou la vitesse de l'organe mobile.4. Motor device according to claim 3, characterized in that the movable member (34) comprises or is integral with at least one magnetized part (39) cooperating with at least one detector. magnetic field (in 40) to detect the position and / or the speed of the moving part.
5. Dispositif moteur selon l'une des revendications précédentes, caractérisé en ce que le moteur est un moteur rotatif , comportant un disque (15) aimanté dans le sens axial, le long d'au moins une zone annulaire, lesdits circuits magnétiques (5) comportant, chacun, au moins un empilage de tôles en forme de U, l'ensemble des circuits étant couplé avec au moins une bobine (12) disposée coaxialement par rapport à l'axe du disque (15).5. Motor device according to one of the preceding claims, characterized in that the motor is a rotary motor, comprising a disc (15) magnetized in the axial direction, along at least one annular zone, said magnetic circuits (5 ) each comprising at least one stack of U-shaped sheets, all of the circuits being coupled with at least one coil (12) arranged coaxially with respect to the axis of the disc (15).
6. Dispositif moteur selon la revendication 5, caractérisé en ce que l'organe mobile (11 ,14) est solidaire d'une extrémité d'une barre de torsion.6. Motor device according to claim 5, characterized in that the movable member (11, 14) is integral with one end of a torsion bar.
7. Dispositif moteur selon la revendication 6, caractérisé en ce qu'il comporte deux moteurs rotatifs (1 ,2), dont les stators sont solidaires entre eux et dont les organes mobiles sont disposés coaxialement et sont reliés, entre eux, par l'intermédiaire d'au moins une barre de torsion (17,23), les deux moteurs travaillant en opposition de phase.7. Motor device according to claim 6, characterized in that it comprises two rotary motors (1, 2), whose stators are integral with each other and whose movable members are arranged coaxially and are connected to each other by the at least one torsion bar (17,23), the two motors working in phase opposition.
8. Dispositif moteur selon la revendication 7, caractérisé en ce qu'une partie intermédiaire de la barre de torsion est solidaire d'un organe suspendu élastiquement par rapport aux stators desdits moteurs.8. Motor device according to claim 7, characterized in that an intermediate part of the torsion bar is integral with a member suspended elastically relative to the stators of said motors.
9. Dispositif moteur selon la revendication 7, caractérisé en ce que les organes mobiles (11 ,14; 24) de chacun des moteurs sont solidaires d'une des extrémités d'une barre de torsion (17,23) respective, les autres extrémités des barres de torsion étant rendues solidaires, entre elles, par l'intermédiaire d'un organe (19) suspendu élastiquement par rapport aux stators des moteurs.9. Motor device according to claim 7, characterized in that the movable members (11, 14; 24) of each of the motors are integral with one of the ends of a respective torsion bar (17,23), the other ends torsion bars being made integral with each other by means of a member (19) suspended elastically relative to the stators of the motors.
10. Dispositif moteur selon les revendications 7, 8 ou 9, caractérisé en ce que la charge du moteur est solidaire de l'organe mobile de l'un des moteurs, l'organe mobile de l'autre moteur étant solidaire d'une masse d'équilibrage.10. Motor device according to claims 7, 8 or 9, characterized in that the motor load is integral with the member mobile of one of the motors, the mobile member of the other motor being integral with a balancing mass.
11. Dispositif moteur selon l'une des revendications 1 , 3, 4 ou 5, caractérisé en ce que l'organe mobile (34) est solidaire d'une extrémité d'au moins une lame ressort (37) inclinée par rapport à la direction de l'axe du disque aimanté, l'autre extrémité de la lame ressort étant solidaire d'une partie de charge (36) déplaçable angulairement et axialement par rapport au stator du moteur. .11. Motor device according to one of claims 1, 3, 4 or 5, characterized in that the movable member (34) is integral with one end of at least one leaf spring (37) inclined relative to the direction of the axis of the magnetic disc, the other end of the leaf spring being integral with a load part (36) angularly and axially movable relative to the stator of the motor. .
12. Dispositif moteur selon l'une des revendications 1 , 3, 4 ou 5, caractérisé en ce que l'organe mobile est couplé avec une partie de charge de manière à conférer à celle-ci un mouvement essentiellement linéaire.12. Motor device according to one of claims 1, 3, 4 or 5, characterized in that the movable member is coupled with a load part so as to impart thereto an essentially linear movement.
13. Utilisation du dispositif moteur selon l'une des revendications 1 , 3, 4, 5, 11 ou 12 pour l'actionnement d'un dispositif vibreur. 13. Use of the motor device according to one of claims 1, 3, 4, 5, 11 or 12 for the actuation of a vibrating device.
PCT/CH1993/000004 1992-01-16 1993-01-13 Reciprocating motor device WO1993014553A1 (en)

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CH11492 1992-01-16
CH114/92-3 1992-01-16

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Publication number Priority date Publication date Assignee Title
FR2812225B1 (en) * 2000-07-26 2003-01-03 Moving Magnet Tech VIBRATOR FOR PORTABLE PHONE
US20050189824A1 (en) * 2003-12-04 2005-09-01 Lg Electronics Inc. Reciprocating motor

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US3192488A (en) * 1961-10-10 1965-06-29 Winston O Faith Multiphase electromechanical oscillator
US3483410A (en) * 1967-11-21 1969-12-09 Beckman Instruments Inc High torque motor
GB1575559A (en) * 1977-05-26 1980-09-24 Gillette Co Vibratory electromagnetic motors
DE2556924C2 (en) * 1974-12-19 1984-12-13 General Scanning Inc., Watertown, Mass. Bearingless vibration motor
WO1985003473A1 (en) * 1984-02-01 1985-08-15 Twin City Surgical Inc. Cast cutter apparatus
EP0155057A2 (en) * 1984-03-13 1985-09-18 Koninklijke Philips Electronics N.V. Motor-compressor unit
US4658953A (en) * 1984-03-05 1987-04-21 Schopfer Pierre Andre Device for moving workpieces by means of electromagnetic oscillations
WO1987002525A1 (en) * 1985-10-12 1987-04-23 Herbert Weh Current converter-fed synchronous machine with permanent magnet excitation

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Publication number Priority date Publication date Assignee Title
US2574082A (en) * 1949-04-02 1951-11-06 Smidth & Co As F L Roto-vibrator
US3192488A (en) * 1961-10-10 1965-06-29 Winston O Faith Multiphase electromechanical oscillator
US3483410A (en) * 1967-11-21 1969-12-09 Beckman Instruments Inc High torque motor
DE2556924C2 (en) * 1974-12-19 1984-12-13 General Scanning Inc., Watertown, Mass. Bearingless vibration motor
GB1575559A (en) * 1977-05-26 1980-09-24 Gillette Co Vibratory electromagnetic motors
WO1985003473A1 (en) * 1984-02-01 1985-08-15 Twin City Surgical Inc. Cast cutter apparatus
US4658953A (en) * 1984-03-05 1987-04-21 Schopfer Pierre Andre Device for moving workpieces by means of electromagnetic oscillations
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WO1987002525A1 (en) * 1985-10-12 1987-04-23 Herbert Weh Current converter-fed synchronous machine with permanent magnet excitation

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IT1261741B (en) 1996-06-03
ITRM930016A0 (en) 1993-01-15
AU3252793A (en) 1993-08-03
FR2686747A1 (en) 1993-07-30
ITRM930016A1 (en) 1994-07-15

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