CH675047B5 - - Google Patents
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- Publication number
- CH675047B5 CH675047B5 CH3884/88A CH388488A CH675047B5 CH 675047 B5 CH675047 B5 CH 675047B5 CH 3884/88 A CH3884/88 A CH 3884/88A CH 388488 A CH388488 A CH 388488A CH 675047 B5 CH675047 B5 CH 675047B5
- Authority
- CH
- Switzerland
- Prior art keywords
- stator
- rotor
- branch
- external magnetic
- coil
- Prior art date
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 24
- 230000004907 flux Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/141—Stator cores with salient poles consisting of C-shaped cores
- H02K1/143—Stator cores with salient poles consisting of C-shaped cores of the horse-shoe type
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C13/00—Driving mechanisms for clocks by primary clocks
- G04C13/08—Secondary clocks actuated intermittently
- G04C13/10—Secondary clocks actuated intermittently by electromechanical step advancing mechanisms
- G04C13/11—Secondary clocks actuated intermittently by electromechanical step advancing mechanisms with rotating armature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/014—Shields associated with stationary parts, e.g. stator cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K37/16—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures having horseshoe armature cores
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
1 1
CH 675 047G A3 CH 675 047G A3
2 2
Description Description
La présente invention a pour objet un moteur pas à pas pour pièces d'horlogerie possédant des arrangements au niveau du circuit magnétique statori-que afin de permettre au moteur une plus grande résistance aux champs magnétiques externes. The present invention relates to a stepping motor for timepieces having arrangements at the level of the statori-magnetic circuit in order to allow the motor greater resistance to external magnetic fields.
Les moteurs pas à pas classiques utilisés dans les montres à quartz sont généralement assez sensibles aux champs magnétiques externes, surtout lorsque ces champs agissent dans la direction du noyau de bobine. Pour augmenter la tenue aux champs magnétiques externes, ces moteurs sont souvent équipés des pièces de protection formées par des tôles ferromagnétiques entourant entièrement ou partiellement le moteur. Ces pièces de protection magnétique ont comme inconvénient une augmentation du prix de fabrication, ainsi qu'une perte de place sur la hauteur totale du moteur. The classic stepping motors used in quartz watches are generally quite sensitive to external magnetic fields, especially when these fields act in the direction of the coil core. To increase the resistance to external magnetic fields, these motors are often fitted with protective parts formed by ferromagnetic sheets completely or partially surrounding the motor. These magnetic protection parts have the disadvantage of an increase in the manufacturing price, as well as a loss of space on the total height of the motor.
C'est le but de la présente invention de remédier aux inconvénients précités, en proposant un moteur avec une plus grande résistance aux champs magnétiques externes que les moteurs classiques, grâce aux moyens revendiqués. It is the object of the present invention to remedy the aforementioned drawbacks, by proposing a motor with greater resistance to external magnetic fields than conventional motors, using the means claimed.
L'invention sera mieux comprise à la lecture de la description qui va suivre, en se référant au dessin annexé, dans lequel: The invention will be better understood on reading the description which follows, with reference to the appended drawing, in which:
- La figure 1 représente un moteur pas à pas classique. - Figure 1 shows a conventional stepper motor.
- La figure 2 représente la répartition du champ magnétique externe dans un moteur classique. - Figure 2 shows the distribution of the external magnetic field in a conventional motor.
- La figure 3 représente la répartition du champ magnétique externe dans un type de moteur selon l'invention. - Figure 3 shows the distribution of the external magnetic field in a type of motor according to the invention.
- La figure 4 représente l'exemple d'une deuxième forme d'exécution du moteur selon l'invention. - Figure 4 shows the example of a second embodiment of the engine according to the invention.
- La figure 5 représente l'exemple d'une troisième forme d'exécution du moteur selon l'invention. - Figure 5 shows the example of a third embodiment of the engine according to the invention.
La figure 1 représente un moteur pas à pas classique possédant un noyau de bobine 1 autour duquel la bobine 2 est enroulée, deux pièces polaires stato-riques 3a et 3b séparées entre elles par deux zones à réluctances élevées 4a et 4b. Au repos, l'aimant de rotor 6, réalisé en un matériau à haute réma-nence, prend la position angulaire telle que son axe magnétique est perpendiculaire à celui passant par les encoches de positionnement 5a et 5b. Lorsqu'une impulsion électrique est appliquée à la bobine 2, le flux <J> créé par la dernière entre en interaction avec celui créé par l'aimant de rotor 6 et fait tourner le dernier de 180 degrés. FIG. 1 represents a conventional stepping motor having a coil core 1 around which the coil 2 is wound, two static pole pieces 3a and 3b separated from each other by two high reluctance zones 4a and 4b. At rest, the rotor magnet 6, made of a material with high remanence, takes the angular position such that its magnetic axis is perpendicular to that passing through the positioning notches 5a and 5b. When an electrical pulse is applied to the coil 2, the flux <J> created by the last one interacts with that created by the rotor magnet 6 and rotates the last one by 180 degrees.
La figure 2 représente la répartition du champ magnétique externe «Dext dans un moteur type classique. On constate qu'une partie de ce flux agit sur le rotor dans le sens opposé à celui créé par la bobine. De ce fait, dans un moteur classique, lorsque le champ magnétique externe atteint une certaine valeur, généralement de l'ordre d'une vingtaine de Oersteds, la rotation du moteur n'est plus assurée. FIG. 2 represents the distribution of the external magnetic field “Dext in a conventional motor. It can be seen that part of this flux acts on the rotor in the opposite direction to that created by the coil. Therefore, in a conventional motor, when the external magnetic field reaches a certain value, generally of the order of twenty Oersteds, the rotation of the motor is no longer ensured.
La figure 3 représente l'exemple d'une première forme d'exécution du moteur selon l'invention. Dans cet exemple, la pièce polaire statorique 3b est composée d'une première partie fonctionnelle 3b1 FIG. 3 represents the example of a first embodiment of the engine according to the invention. In this example, the stator pole piece 3b is composed of a first functional part 3b1
comme dans un moteur type classique et d'une deuxième partie fonctionnelle 3b2 destinée à atténuer l'interaction entre le champ magnétique externe et le champ créé par le rotor. Le moteur selon l'invention a de ce fait une meilleure résistance au champ magnétique externe que les moteurs classiques. as in a conventional motor and a second functional part 3b2 intended to attenuate the interaction between the external magnetic field and the field created by the rotor. The motor according to the invention therefore has better resistance to the external magnetic field than conventional motors.
En fabrication, les éléments 3a, 3b1 et 3b2 sont étampés. L'adjonction, par rapport au stator usuel, de la partie fonctionnelle 3b2 n'entraîne aucune difficulté supplémentaire de par le fait que ce bras est découpé simultanément avec le reste du pourtour du stator. Il n'y a pas non plus d'incidences sur les opérations de fabrication qui suivent l'étampage; de plus, il n'y a pas d'exigence particulière en ce qui concerne la tolérance de forme de ce bras. L'assemblage du stator selon l'invention se fait exactement dans les mêmes conditions qu'avec un stator classique. In manufacturing, the elements 3a, 3b1 and 3b2 are stamped. The addition, with respect to the usual stator, of the functional part 3b2 does not cause any additional difficulty due to the fact that this arm is cut out simultaneously with the rest of the periphery of the stator. There is also no impact on manufacturing operations following stamping; moreover, there is no particular requirement with regard to the shape tolerance of this arm. The assembly of the stator according to the invention is done in exactly the same conditions as with a conventional stator.
L'intérêt économique de la solution faisant l'objet de la présente invention est évident. En effet, les écrans magnétiques traditionnels sont des composants chers de par leur conception. De plus, ils nécessitent dans la plupart des cas des vis de fixation supplémentaires. Le gain apporté par la solution selon l'invention se situe donc à deux niveaux, à savoir: The economic benefit of the solution which is the subject of the present invention is obvious. Indeed, traditional magnetic screens are expensive components by design. In addition, in most cases they require additional fixing screws. The gain provided by the solution according to the invention therefore lies on two levels, namely:
- suppression d'un composant cher - removal of an expensive component
- économie du coût d'assemblage de l'écran magnétique. - saving the cost of assembling the magnetic screen.
La figure 4 représente l'exemple d'une autre forme d'exécution du moteur selon l'invention. Dans cet exemple, le bras supplémentaire faisant partie intégrante du stator se situe à l'extérieur de la bobine. FIG. 4 represents the example of another embodiment of the engine according to the invention. In this example, the additional arm forming an integral part of the stator is located outside the coil.
La figure 5 est une variante de la figure 4. Dans cet exemple, le bras supplémentaire fait partie intégrante du noyau de bobine. Avec cette solution, la bobine est rapportée sur le noyau après bobinage. Figure 5 is a variant of Figure 4. In this example, the additional arm is an integral part of the coil core. With this solution, the coil is attached to the core after winding.
Il va de soi que de nombreuses modifications peuvent être apportées aux exemples décrits et représentés sans sortir du cadre de l'invention. It goes without saying that numerous modifications can be made to the examples described and shown without departing from the scope of the invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH388488A CH675047GA3 (en) | 1988-10-19 | 1988-10-19 | Stepping motor for clock - includes additional pole piece to attenuate interaction between external magnetic field and rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH388488A CH675047GA3 (en) | 1988-10-19 | 1988-10-19 | Stepping motor for clock - includes additional pole piece to attenuate interaction between external magnetic field and rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CH675047GA3 CH675047GA3 (en) | 1990-08-31 |
| CH675047B5 true CH675047B5 (en) | 1991-02-28 |
Family
ID=4265577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH388488A CH675047GA3 (en) | 1988-10-19 | 1988-10-19 | Stepping motor for clock - includes additional pole piece to attenuate interaction between external magnetic field and rotor |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH675047GA3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT237213Y1 (en) * | 1995-10-12 | 2000-09-05 | Scaccabarozzi Marco | CLOCK WITH ELECTRONIC MECHANISM INCLUDED IN A SCREENING ELEMENT |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3564314A (en) * | 1969-07-11 | 1971-02-16 | Tri Tech | Rotor-stator capsule construction |
| JPS53102080A (en) * | 1977-02-17 | 1978-09-06 | Seiko Epson Corp | Magnetisum resistant structure of thin type crystal watch |
| JPS55133662A (en) * | 1979-04-03 | 1980-10-17 | Citizen Watch Co Ltd | Magnetism-resistant structure for step motor for watch |
-
1988
- 1988-10-19 CH CH388488A patent/CH675047GA3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH675047GA3 (en) | 1990-08-31 |
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