FR2568377A1 - Hall-effect speed sensor built into a rotating machine. - Google Patents
Hall-effect speed sensor built into a rotating machine. Download PDFInfo
- Publication number
- FR2568377A1 FR2568377A1 FR8411797A FR8411797A FR2568377A1 FR 2568377 A1 FR2568377 A1 FR 2568377A1 FR 8411797 A FR8411797 A FR 8411797A FR 8411797 A FR8411797 A FR 8411797A FR 2568377 A1 FR2568377 A1 FR 2568377A1
- Authority
- FR
- France
- Prior art keywords
- speed sensor
- hall
- magnets
- rotating machine
- stator
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
Abstract
Description
Capteur de vitesse à effet Hall incorporé dans
une machine tournante.Hall effect speed sensor incorporated in
a rotating machine.
La présente invention concerne un capteur de vitesse à effet Hall incorporé dans une machine tournante. The present invention relates to a Hall effect speed sensor incorporated in a rotary machine.
Pour effectuer la régulation de la vitesse de rotation d'une machine tournante, il est connu d'utiliser divers dispositifs permettant de capter la vitesse et de la transformer en un signal en vue de son traitement par un circuit électronique. To regulate the speed of rotation of a rotating machine, it is known to use various devices making it possible to capture the speed and transform it into a signal for processing by an electronic circuit.
Parmi ces dispositifs, on connaît les capteurs magnétiques bobinés qui sont susceptibles de produire, lors du passage d'un aimant lié au rotor de la machine, un signal proportionnel au champ induit par l'aimant. Among these devices, there are known wound magnetic sensors which are capable of producing, during the passage of a magnet linked to the rotor of the machine, a signal proportional to the field induced by the magnet.
Cependant, ce signal ne présente pas de seuil mais varie de façon sensiblement sinusoldale, de sorte qutil ne peut être directement utilisé pour attaquer le convertisseur du circuit de traitement. Le signal doit tout d'abord être filtré pour être transformé en un signal carré à fronts raides, ce qui complique évidemment le circuit de traitement du signal et augmente le prix de revient du capteur.However, this signal does not have a threshold but varies in a substantially sinusoidal manner, so that it cannot be directly used to attack the converter of the processing circuit. The signal must first be filtered to be transformed into a square signal with steep edges, which obviously complicates the signal processing circuit and increases the cost price of the sensor.
Un autre type connu de capteur de vitesse est constitué par un dispositif optique comprenant d'une part, un disque entraîné par le moteur et qui est percé de trous au voisinage de sa périphérie et, d'autre part, une pièce en forme de fourche qui chevauche le disque, les bras de ladite fourche portant respectivement une source lumineuse et une cellule photo-électrique situées à une distance de l'axe du disque égale à celle des trous. Another known type of speed sensor is constituted by an optical device comprising on the one hand, a disc driven by the motor and which is pierced with holes in the vicinity of its periphery and, on the other hand, a fork-shaped part which overlaps the disc, the arms of said fork carrying respectively a light source and a photoelectric cell located at a distance from the axis of the disc equal to that of the holes.
Lorsque le disque tourne, la cellule photo-électrique est éclairée de façon intermitente à travers les trous du disque et elle produit donc des impulsions dont la fréquence est proportionnelle à la vitesse du moteur.When the disc spins, the photocell is intermittently lit through the holes in the disc and therefore produces pulses whose frequency is proportional to the speed of the motor.
Bien qutun tel capteur de vitesse fournisse des signaux à fronts raides, donc directement exploitables, il pose des difficultés pour sa mise en oeuvre étant donné que son positionnement ainsi que les réglages qutil nécessite doivent être extrêmement précis. De plus, ce capteur est relativement onéreux. Although such a speed sensor provides signals with steep edges, therefore directly exploitable, it poses difficulties for its implementation since its positioning as well as the adjustments which it requires must be extremely precise. In addition, this sensor is relatively expensive.
La présente invention a pour but de remédier à ces inconvénients et à cet effet, elle a pour objet un capteur de vitesse qui se caractérise en ce qutil comprend une pluralité d'aimants fixés à intervalles réguliers et avec un sens de polarité défini, sur les ailettes du ventilateur interne du moteur, et une cellule à effet Hall montée fixement sur le stator du côté du ventilateur et à faible distance de la trajectoire des aimants au cours de la rotation. The object of the present invention is to remedy these drawbacks and for this purpose it relates to a speed sensor which is characterized in that it comprises a plurality of magnets fixed at regular intervals and with a defined sense of polarity, on the fins of the internal fan of the motor, and a Hall effect cell fixedly mounted on the stator on the side of the fan and a short distance from the trajectory of the magnets during rotation.
Dans une forme de réalisation avantageuse de l'invention, la cellule à effet Hall est fixée à l'extrémité de l'une des tiges de serrage des tôles d'une des masses polaires du stator. In an advantageous embodiment of the invention, the Hall effect cell is fixed to the end of one of the clamping rods of the sheets of one of the pole masses of the stator.
A chaque passage d'un aimant à l'aplomb de la cellule, celle-ci est le siège d'un signal à fronts très raides et d'amplitude constante qui peut être facilement traité. Each time a magnet passes over the cell, it is the site of a signal with very steep edges and constant amplitude which can be easily processed.
Le capteur selon l'invention a l'avantage de pouvoir être adapté sur les moteurs existants sans mociticajion de leur structure interne. De plus, en raison de sa petite taille, il peut être inséré à l'intérieur même du moteur et est donc à l'abri contre tout risque de détérioration. La chaleur qui règne à l'intérieur du moteur ne porte pas préjudice à son bon fonctionnement puisqu'il peut sup- porter une température ambiante allant jusqu'à 1500C. En outre, il est insensible aux perturbations électromagnétiques du moteur, ainsi qu'aux souillures et dépôts divers, contrairement aux capteurs optiques mentionnés précédemment. Enfin, sa mise en place dans le moteur demande moins de précision que celle du capteur optique. The sensor according to the invention has the advantage of being able to be adapted to existing engines without mociticajion of their internal structure. In addition, due to its small size, it can be inserted inside the engine itself and is therefore protected against any risk of damage. The heat inside the engine does not affect its proper functioning since it can withstand an ambient temperature of up to 1500C. In addition, it is insensitive to electromagnetic disturbances of the engine, as well as to various stains and deposits, unlike the optical sensors mentioned above. Finally, its installation in the engine requires less precision than that of the optical sensor.
Un mode de réalisation de l'invention sera à présent décrit en détail en regard du dessin annexé dans lequel:
La figure 1 est une vue en élévation du stator d'un moteur muni d'une cellule à effet Hall, le ventilateur étant supposé retiré; et
La figure 2 est une vue en coupe suivant la ligne
II-II de la figure 1.An embodiment of the invention will now be described in detail with reference to the attached drawing in which:
Figure 1 is an elevational view of the stator of an engine provided with a Hall effect cell, the fan being assumed to be removed; and
Figure 2 is a sectional view along the line
II-II of Figure 1.
Avec référence aux figures, le moteur comprend de façon connue en soi, à l'intérieur d'un carter 10, un stator 12 comprenant des masses polaires 14 sur lesquelles sont bobinées les spires du stator. Entre les masses polaires, qui dans ltexemple de la figure, sont au nombre de deux, tourne l'induit 16. Comme on le sait, les masses polaires sont formées d'un empilement de tôles maintenues serrées au moyen de tiges 18 qui les traversent axialement. Sur l'arbre 20 est calé un ventilateur 22 destiné à refroidir l'intérieur du moteur. With reference to the figures, the motor comprises, in a manner known per se, inside a casing 10, a stator 12 comprising polar masses 14 on which the turns of the stator are wound. Between the polar masses, which in the example of the figure are two in number, turns the armature 16. As is known, the polar masses are formed by a stack of sheets kept tight by means of rods 18 which pass through them axially. On the shaft 20 is fixed a fan 22 intended to cool the interior of the engine.
Conformément à l'invention, entre les ailettes du ventilateur 22 sont fixés, à intervalles réguliers, de petits aimants 24, de préférence cylindriques. De plus, à l'extrémité de l'une des tiges de serrage 18 est fixée, du côté du ventilateur, une plaquette à circuit imprimé 26 disposée perpendiculairement à l'arbre 20 et soutenant une cellule à effet Hall 28. Le positionnement est choisi pour que les aimants passent au cours de leur rotation, juste devant la cellule à effet Hall 28 et à une faible distance de celle-ci, par exemple à 2 mm environ. According to the invention, between the fins of the fan 22 are fixed, at regular intervals, small magnets 24, preferably cylindrical. In addition, at the end of one of the clamping rods 18 is fixed, on the fan side, a printed circuit board 26 disposed perpendicular to the shaft 20 and supporting a Hall effect cell 28. The positioning is chosen so that the magnets pass during their rotation, just in front of the Hall effect cell 28 and at a short distance from it, for example about 2 mm.
Pour régler cette distance, on peut placer sous la plaquette 26 une cale 30 et un certain nombre de rondelles 32. Le positionnement de la plaquette est facilité en donnant au bord 34 de celle-ci qui est le plus éloigné de l'arbre 20, une forme arrondie de même rayon que le rayon interne du carter 10. Ainsi, en position de montage, la plaquette est appliquée par son bord arrondi contre la paroi interne du carter. To adjust this distance, a shim 30 and a number of washers 32 can be placed under the plate 26. The positioning of the plate is facilitated by giving the edge 34 thereof which is furthest from the shaft 20, a rounded shape with the same radius as the internal radius of the housing 10. Thus, in the mounting position, the plate is applied by its rounded edge against the internal wall of the housing.
A chaque passage d'un aimant au droit de la cellule à effet Hall 28, celle-ci fournit un signal électrique de forme carrée à fronts très raides et d'amplitude constante, qui peut être facilement traité par un circuit classique. Each time a magnet passes the Hall effect cell 28, it provides a square-shaped electrical signal with very steep edges and constant amplitude, which can be easily processed by a conventional circuit.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8411797A FR2568377A1 (en) | 1984-07-25 | 1984-07-25 | Hall-effect speed sensor built into a rotating machine. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8411797A FR2568377A1 (en) | 1984-07-25 | 1984-07-25 | Hall-effect speed sensor built into a rotating machine. |
Publications (1)
Publication Number | Publication Date |
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FR2568377A1 true FR2568377A1 (en) | 1986-01-31 |
Family
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Family Applications (1)
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FR8411797A Pending FR2568377A1 (en) | 1984-07-25 | 1984-07-25 | Hall-effect speed sensor built into a rotating machine. |
Country Status (1)
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FR (1) | FR2568377A1 (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223109A1 (en) * | 1985-10-26 | 1987-05-27 | WILO-Werk GmbH & Co. Pumpen- und Apparatebau | Centrifugal pump or ventilator |
US4732494A (en) * | 1986-06-10 | 1988-03-22 | S. N. R. Roulements | Bearing or roller bearing with data sensor |
FR2605742A1 (en) * | 1986-10-24 | 1988-04-29 | Veglia Borletti Srl | TACHOMETER GENERATOR |
DE8530448U1 (en) * | 1985-10-26 | 1989-07-06 | Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund, De | |
US4924674A (en) * | 1987-09-30 | 1990-05-15 | Isuzu Motors Limited | Turbocharger with rotary electric machine |
DE4137385A1 (en) * | 1991-11-14 | 1993-05-19 | Hilti Ag | SPEED CONTROL DEVICE FOR A HAND-HELD ELECTRIC TOOL AND METHOD FOR THE PRODUCTION THEREOF |
US5338283A (en) * | 1992-10-09 | 1994-08-16 | E. I. Du Pont De Nemours And Company | Centrifuge rotor identification system |
DE4324622A1 (en) * | 1993-07-22 | 1995-01-26 | Teves Gmbh Alfred | Device for detecting the rotary movement |
DE29514026U1 (en) * | 1995-09-01 | 1995-11-02 | Sew Eurodrive Gmbh & Co | Device for detecting the speed and / or direction of rotation of motors, in particular asynchronous motors |
US5596271A (en) * | 1994-05-03 | 1997-01-21 | Multicraft International | Method of and apparatus for detecting the rotation rate of an air moving fan |
ES2109135A1 (en) * | 1994-04-21 | 1998-01-01 | Zertan Sa | Improvements in electric motors for washing-machines, dishwashers and similar items. |
US7224093B2 (en) * | 2000-03-10 | 2007-05-29 | Valeo Equipements Electriques Moteur | Polyphase electric rotary machine |
US7476144B2 (en) | 2007-06-13 | 2009-01-13 | Black & Decker Inc. | Sander |
US7485026B2 (en) | 2007-06-13 | 2009-02-03 | Black & Decker Inc. | Sander |
DE10340325B4 (en) * | 2003-08-29 | 2009-04-09 | Sew-Eurodrive Gmbh & Co. Kg | electric motor |
US7534165B2 (en) | 2007-06-13 | 2009-05-19 | Black & Decker Inc. | Sander |
US7722435B2 (en) | 2007-06-13 | 2010-05-25 | Black & Decker Inc. | Sander |
ITBO20090734A1 (en) * | 2009-11-10 | 2011-05-11 | Alfredo Coccagna | CONTROL AND MEASUREMENT GROUP, PARTICULARLY FOR ELECTRIC MOTORS. |
US8241434B2 (en) * | 2005-01-25 | 2012-08-14 | Johnson Electric S.A. | Dishwasher with high voltage DC motor |
US8398457B2 (en) | 2008-08-20 | 2013-03-19 | Black & Decker Inc. | Multi-sander |
CN105429418A (en) * | 2015-11-26 | 2016-03-23 | 深圳市瑞凌实业股份有限公司 | Motor and magnetic feedback based system for enabling rotating speed of motor to be constant |
US9421682B2 (en) | 2011-07-18 | 2016-08-23 | Black & Decker Inc. | Multi-head power tool with reverse lock-out capability |
US9956677B2 (en) | 2013-05-08 | 2018-05-01 | Black & Decker Inc. | Power tool with interchangeable power heads |
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US438276A (en) * | 1890-10-14 | Ole pederson | ||
GB893556A (en) * | 1958-12-04 | 1962-04-11 | Stanley Coad | Improvements relating to the determination of the rate of flow of a fluid |
US3786272A (en) * | 1972-11-03 | 1974-01-15 | Veeder Industries Inc | Hall effect rotary pulse generator |
GB1597446A (en) * | 1978-05-25 | 1981-09-09 | Desoutter Ltd | Counting the revolutions of the rotor of a compressed air motor |
GB2087565A (en) * | 1980-10-22 | 1982-05-26 | Sony Corp | Position detecting signal generators |
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DE3208721A1 (en) * | 1982-03-11 | 1983-09-22 | Robert Bosch Gmbh, 7000 Stuttgart | SENSOR |
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1984
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US438276A (en) * | 1890-10-14 | Ole pederson | ||
GB893556A (en) * | 1958-12-04 | 1962-04-11 | Stanley Coad | Improvements relating to the determination of the rate of flow of a fluid |
US3786272A (en) * | 1972-11-03 | 1974-01-15 | Veeder Industries Inc | Hall effect rotary pulse generator |
GB1597446A (en) * | 1978-05-25 | 1981-09-09 | Desoutter Ltd | Counting the revolutions of the rotor of a compressed air motor |
US4385276A (en) * | 1980-01-28 | 1983-05-24 | Black & Decker Inc. | Mounting of semiconductor sensing means for an electromagnetic tachometer in a portable electric tool |
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Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0223109A1 (en) * | 1985-10-26 | 1987-05-27 | WILO-Werk GmbH & Co. Pumpen- und Apparatebau | Centrifugal pump or ventilator |
DE8530448U1 (en) * | 1985-10-26 | 1989-07-06 | Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund, De | |
US4732494A (en) * | 1986-06-10 | 1988-03-22 | S. N. R. Roulements | Bearing or roller bearing with data sensor |
FR2605742A1 (en) * | 1986-10-24 | 1988-04-29 | Veglia Borletti Srl | TACHOMETER GENERATOR |
US4924674A (en) * | 1987-09-30 | 1990-05-15 | Isuzu Motors Limited | Turbocharger with rotary electric machine |
US5296768A (en) * | 1991-11-14 | 1994-03-22 | Hilti Aktiengesellschaft | Revolutions per minute regulation device for a hand-held electric tool and method of its manufacture |
DE4137385A1 (en) * | 1991-11-14 | 1993-05-19 | Hilti Ag | SPEED CONTROL DEVICE FOR A HAND-HELD ELECTRIC TOOL AND METHOD FOR THE PRODUCTION THEREOF |
US5338283A (en) * | 1992-10-09 | 1994-08-16 | E. I. Du Pont De Nemours And Company | Centrifuge rotor identification system |
DE4324622A1 (en) * | 1993-07-22 | 1995-01-26 | Teves Gmbh Alfred | Device for detecting the rotary movement |
ES2109135A1 (en) * | 1994-04-21 | 1998-01-01 | Zertan Sa | Improvements in electric motors for washing-machines, dishwashers and similar items. |
US5596271A (en) * | 1994-05-03 | 1997-01-21 | Multicraft International | Method of and apparatus for detecting the rotation rate of an air moving fan |
DE29514026U1 (en) * | 1995-09-01 | 1995-11-02 | Sew Eurodrive Gmbh & Co | Device for detecting the speed and / or direction of rotation of motors, in particular asynchronous motors |
US7224093B2 (en) * | 2000-03-10 | 2007-05-29 | Valeo Equipements Electriques Moteur | Polyphase electric rotary machine |
DE10340325B4 (en) * | 2003-08-29 | 2009-04-09 | Sew-Eurodrive Gmbh & Co. Kg | electric motor |
US8241434B2 (en) * | 2005-01-25 | 2012-08-14 | Johnson Electric S.A. | Dishwasher with high voltage DC motor |
US7485026B2 (en) | 2007-06-13 | 2009-02-03 | Black & Decker Inc. | Sander |
US7476144B2 (en) | 2007-06-13 | 2009-01-13 | Black & Decker Inc. | Sander |
US7722435B2 (en) | 2007-06-13 | 2010-05-25 | Black & Decker Inc. | Sander |
US7534165B2 (en) | 2007-06-13 | 2009-05-19 | Black & Decker Inc. | Sander |
US8821220B2 (en) | 2008-08-20 | 2014-09-02 | Black & Decker Inc. | Power tool with interchangeable tool head |
US8398457B2 (en) | 2008-08-20 | 2013-03-19 | Black & Decker Inc. | Multi-sander |
US8613644B2 (en) | 2008-08-20 | 2013-12-24 | Black & Decker Inc. | Multi-sander |
US9724799B2 (en) | 2008-08-20 | 2017-08-08 | Black & Decker Inc. | Power tool with interchangeable tool head |
US10906155B2 (en) | 2008-08-20 | 2021-02-02 | Black & Decker Inc. | Power tool with interchangeable tool head |
ITBO20090734A1 (en) * | 2009-11-10 | 2011-05-11 | Alfredo Coccagna | CONTROL AND MEASUREMENT GROUP, PARTICULARLY FOR ELECTRIC MOTORS. |
US9421682B2 (en) | 2011-07-18 | 2016-08-23 | Black & Decker Inc. | Multi-head power tool with reverse lock-out capability |
US9956677B2 (en) | 2013-05-08 | 2018-05-01 | Black & Decker Inc. | Power tool with interchangeable power heads |
US10661428B2 (en) | 2013-05-08 | 2020-05-26 | Black & Decker Inc. | Power tool with interchangeable tool heads |
CN105429418A (en) * | 2015-11-26 | 2016-03-23 | 深圳市瑞凌实业股份有限公司 | Motor and magnetic feedback based system for enabling rotating speed of motor to be constant |
CN105429418B (en) * | 2015-11-26 | 2018-04-13 | 深圳市瑞凌实业股份有限公司 | Motor and magnetic reaction type motor speed constant velocity system |
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