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WO2003049261A1 - Moteur pas-a-pas - Google Patents

Moteur pas-a-pas Download PDF

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Publication number
WO2003049261A1
WO2003049261A1 PCT/JP2002/012669 JP0212669W WO03049261A1 WO 2003049261 A1 WO2003049261 A1 WO 2003049261A1 JP 0212669 W JP0212669 W JP 0212669W WO 03049261 A1 WO03049261 A1 WO 03049261A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
stepping motor
gear
magnetic
magnetic pole
Prior art date
Application number
PCT/JP2002/012669
Other languages
English (en)
Japanese (ja)
Inventor
Takayuki Matsui
Yasuyuki Takemoto
Hiroyuki Maeno
Original Assignee
Fdk Corporation
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
Priority claimed from JP2001370559A external-priority patent/JP4031930B2/ja
Priority claimed from JP2001370558A external-priority patent/JP4072336B2/ja
Application filed by Fdk Corporation filed Critical Fdk Corporation
Publication of WO2003049261A1 publication Critical patent/WO2003049261A1/fr

Links

Classifications

    • 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

Definitions

  • the present invention relates to a technology that is effective when applied to a stepping motor, particularly a motor with a reduction mechanism that outputs the rotation of a rotor (rotor) composed of multi-polar magnetized permanent magnets by reducing the rotation with gears. It is used to drive the pointer of the indicating instrument.
  • a stepping motor particularly a motor with a reduction mechanism that outputs the rotation of a rotor (rotor) composed of multi-polar magnetized permanent magnets by reducing the rotation with gears. It is used to drive the pointer of the indicating instrument.
  • Indicating instruments are capable of displaying analog quantities such as speed in an intuitive and easy-to-understand manner based on the position of the pointer on the dial.
  • Steppping motors have been used to digitally control the position of the pointer.
  • the steering motor is used for positioning the pointer by open loop control. That is, by applying a forward or reverse rotation drive pulse to a stepping motor having a rotary output shaft connected to the pointer, the pointer can be moved in both directions and the rotation drive pulse can be applied. The amount of movement of the pointer can be controlled by the number of.
  • This type of stepping motor includes a circular rotor composed of multi-pole magnetized permanent magnets, as disclosed in, for example, US Pat. No. 5,959,378. And a gear reduction mechanism that reduces the rotational motion of the rotor that is rotationally driven by the rotating magnetic field and transmits the rotation to the output shaft.
  • FIG. 7A and 7B show an example of the configuration of a conventional stepping motor, and in particular, show a plan layout diagram (FIG. 7A) and a cross-sectional view (FIG. 7B) of the inside of the motor.
  • a rotor 20, a stator 30, and a gear reduction mechanism (62 to 68) are incorporated in a thin resin casing 10 having a substantially circular contour. .
  • the rotor 20 is a permanent magnet using a hard magnetic material. As shown in the figure, the rotor 20 has multiple poles such that the S pole and the N pole alternately appear at regular angular intervals (60 degrees) in the circumferential direction. It is magnetized.
  • the stator 30 is composed of stator yokes 3 a and 3 b and a coil 50.
  • the stator yokes 3a and 3b are made of soft magnetic material, and have a planar U-shaped (or C-shaped) planar shape. Both ends of the U-shape form a magnetic pole portion that is closely opposed to the outer peripheral surface of the rotor 20, that is, the magnetic pole passing surface.
  • the coil 50 is wound around a winding bobbin 40 fitted to an intermediate portion between the stator yokes 3a and 3b.
  • two sets of the stator yokes 3a and 3b and the coiler 50 are provided as shown in FIG.
  • the amount of rotation can be controlled by the number of times of application of the two-phase pulse drive current, that is, the number of pulses, and the direction of rotation can be controlled by the phase of the two-phase pulse drive current.
  • the gear reduction mechanism includes a first small gear 25 connected to the rotor 20 (coaxial connection), a first large gear 26 connected to the first small gear 25, and a first gear 26 connected to the first large gear 26. And a second large gear 28 connected to the second small gear 27, and the shaft of the second large gear 28 in the final high speed stage is the rotation output shaft 2 of the motor. It is derived as Case 9 outside Case 10.
  • first, smooth rotation is required in order to indicate analog amounts such as speed without a sense of incongruity. Due to the improved noise reduction characteristics, the required level of noise reduction has become particularly high.
  • a rotational torque is generated in the rotor each time the pulse drive current is applied.
  • a so-called detent torque due to the magnetic attraction force acting between the rotor and the stator, a force that pulls the rotor to a specific rotation position to stop the rotation, a so-called detent torque, generates torque ripple in the rotation output of the steering motor, and the motor In addition to hindering the continuous and smooth rotation of the motor, it may cause noise.
  • a so-called gear noise between gear teeth causes a large noise, but the gear noise increases due to the influence of the detent torque.
  • This detent torque can be reduced to some extent by devising the magnetic pole shape of the stator yoke or optimizing the relative position thereof.
  • the detent torque is reduced by imparting a predetermined magnetic pole shape to the stator yoke.
  • the shape of the magnetic pole is a complicated shape with partial curvature, and to form it with high reproducibility requires high-precision and troublesome processing, resulting in mass production and low cost.
  • the rotational torque is designed to be a necessary minimum in order to reduce the hitting noise at the gear teeth or the shaft.
  • the lubricating oil that can be used for the speed reduction mechanism is limited to low viscosity Therefore, it is necessary to reduce the amount used.
  • smooth rotation and low noise can be achieved by filling gaps such as gear teeth and shafts with high-viscosity grease. Then you can't do that.
  • the stepping motor when used, for example, for driving the pointer of the above-mentioned indicating instrument, the movement of the pointer is not smooth, and the analog amount such as the speed cannot be smoothly indicated without a sense of incongruity. Occurs.
  • the torque ripple causes vibration and noise, there is a problem that the torque ripple is not suitable for use where quietness is required.
  • this type of stepping motor is often used with a plurality of gears (gears) that transmit while reducing the rotation of the motor rotation shaft.
  • gears that transmit while reducing the rotation of the motor rotation shaft.
  • the noise due to the vibration of the torque ripple described above is used.
  • the present invention has been made in view of the above-described problems, and one object of the present invention is to efficiently reduce the detent torque in a stepping motor while improving productivity and cost. Another object of the present invention is to provide a stepping motor in which the rotation of a rotor composed of multi-pole magnetized permanent magnets is output at a reduced speed by means of a gear, for example, the positioning of a pointer can be performed by an open loop control. The aim is to achieve smoother rotation and lower noise with good reproducibility without impairing the original characteristics of the bing motor. Disclosure of the invention
  • One embodiment of the present invention provides a rotor having a permanent magnet multipolarly magnetized so that magnetic poles are alternately reversed along a circumferential direction, and a rotor having two or more phases arranged around the outer periphery of the rotor. It comprises two or more stator yokes forming a polyphase field, and an exciting coil for exciting the stator yoke, and the magnetic pole portion of the stator yoke passes through the magnetic pole of the permanent magnet.
  • a stepping motor arranged so as to be closely opposed to a surface, a predetermined position between two adjacent stators and a position which is closely opposed to a magnetic pole passage surface of the permanent magnet, a magnetic force is generated from the stator yokes on both sides.
  • an independent soft magnetic intermediate magnetic material is arranged, and the intermediate magnetic material is formed by punching a ferromagnetic metal sheet, and the sagged surface formed by the punching is located on the opposite side to the permanent magnet. It is characterized by being located.
  • a stepping motor with a reduction mechanism for reducing the rotation of a rotor composed of a multipolar magnetized permanent magnet by a gear and outputting the reduced gear, wherein a small gear is coaxially connected to the rotor, A fixed positional relationship is formed between the gear teeth of the pinion and the magnetic poles of the rotor.
  • 1A to 1D are a composite view showing an embodiment of a stepping motor according to one embodiment of the present invention by a plan view, a partial cross-sectional view thereof, and an enlarged view.
  • FIG. 2 is a plan view illustrating a configuration example in which the stepping motor according to one embodiment of the present invention is incorporated in a case together with a speed reduction mechanism including a plurality of gears.
  • FIG. 3 shows an embodiment of a stepping motor with a speed reduction mechanism according to another embodiment of the present invention.
  • FIG. 3A is a plan layout view of the inside of the motor
  • FIG. 3B is a sectional view thereof.
  • FIG. 4 shows an embodiment of the boss member used in the motor of FIG. 3, in particular, FIG. 4A is a side view thereof, FIG. 4B is a cross-sectional view, and FIG. 4C is an overall perspective view.
  • 5A to 5C are diagrams showing a positional relationship between a positioning portion formed on the boss member and the first small gear.
  • FIGS. 6A to 6C are views showing a setup state when performing multipolar magnetization of a rotor that is insert-molded integrally with a boss member.
  • FIG. 7 shows an example of the configuration of a conventional stepping motor.
  • FIG. 7A is a plan view of the inside of the motor
  • FIG. 7B is a cross-sectional view thereof.
  • FIG. 1A to 1D show an embodiment of a stepping motor according to the first embodiment of the present invention, in particular, a plan view of a main part thereof and a sectional view of each part.
  • a rotor (rotor) 20 is formed by an annular permanent magnet 22 axially connected (coaxially connected) to a rotating shaft 24.
  • the permanent magnet 22 is multi-pole magnetized so that the magnetic poles are alternately reversed at a pitch of 60 degrees along the circumferential direction, thereby forming a magnetic pole of 3 to 6 poles (3 pole pairs).
  • two stator yokes 3a, 3b are arranged.
  • Each stator yoke 3a, 3b has a deformed U-shaped (or substantially C-shaped) flat surface shape, and both ends of the U-shaped are magnetic pole portions 3al, 3a2, 3b1, 3b2.
  • the two stator yokes 3a and 3b have the same plane shape and face each other symmetrically, and the magnetic pole portions 3al, 3a2, 3b1, and 3b2 correspond to the permanent magnets 22. It is arranged so as to be closely opposed to the pole passing surface.
  • the tip surfaces of the magnetic pole portions 3 al, 3 a 2, 3 b 1, 3 b 2 are each formed in an arc shape along a concentric circle so as to closely face the outer peripheral surface of the permanent magnet 22, that is, the magnetic pole passage surface. Is formed.
  • the center between the magnetic pole portions 3a1 and 3a2 and between the magnetic pole portions 3b1 and 3b2 are centered on the rotation axis of the rotor 20 so as to match the magnetic pole pitch of the permanent magnet 22. It is arranged so as to be located at both ends of a sector arc with a 60-degree angle.
  • the magnetic poles 3a1 and 3b1 should be positioned at both ends of a 90-degree central arc around the rotation axis so that a phase difference of 90 degrees in electrical angle occurs. It is located.
  • each stator yoke 3a, 3b is provided with a winding bobbin 4 0 is attached.
  • An exciting coil 50 is wound on the bobbin 40 in advance.
  • a two-phase salient pole type stepping motor is formed in which one of the stator yokes 3a (or 3b) has an A phase and the other stator yoke 3b (or 3a) has a B phase.
  • Either of the two stator yokes 3a, 3b is located at an intermediate position between the magnetic poles 3al and 3bl of the two adjacent stator yokes 3a, 3b at a pitch angle of 90 degrees.
  • a magnetically independent intermediate magnetic body 60 is disposed without being in contact with the magnetic pole.
  • the intermediate magnetic material 60 is a ferromagnetic soft magnetic material, and is provided in a position and orientation such that it is in parallel and close to the magnetic pole passage surface of the permanent magnet 22 as in the case of the stators 3a and 3b. ing.
  • the intermediate magnetic body 60 has a function of significantly reducing the detent torrent generated by the magnetic attraction between the permanent magnet 22 and the stator yokes 3a and 3b.
  • the intermediate magnetic body 60 force magnetically separated from the stator yokes 3a and 3b suppresses the generation of detent torque due to the magnetic influence from the stator yokes
  • the magnetic field distribution state between the two adjacent stator yokes 3 a and 3 b is flattened by the intermediate magnetic body 60, so that the magnetic attraction force for drawing the rotor 20 to a specific rotation angle, that is, detent The torque is reduced.
  • the detent torque reduction effect of the intermediate magnetic body 60 can be optimized by the configuration described below.
  • the effect of reducing the detent torque by the intermediate magnetic body 60 can be further enhanced by the shape and arrangement of the intermediate magnetic body 60. That is, as shown in the cross-sectional shape (cross-sectional view taken in the direction of arrow A) in FIG. 1B, the intermediate magnetic body 60 forms a deformed U-shaped cross-section having a pair of parallel legs having different lengths.
  • This intermediate magnetic body 60 is formed by punching a soft magnetic metal ferromagnetic thin plate by press working, and bending the soft magnetic thin metal sheet twice by 90 degrees.
  • the pair of parallel legs having different lengths it is preferable that the outer surface of the shorter leg is closely opposed to and parallel to the magnetic pole passage surface of the permanent magnet 22.
  • the ratio of the axial length of the permanent magnet 22, that is, the thickness width t 2 of the near-facing portion to the thickness width t 1 of the magnetic pole passage surface is set to 12 or less (t 1 2 2 ⁇ t 2).
  • the magnetic field distribution that acts to reduce the detent torque can be optimized by moving the close opposing portion to one side of the width center (X) of the magnetic pole passage surface.
  • the rotor 20 is formed so as to cover the upper portion thereof. However, it is needless to say that a suitable effect can be obtained even if the device is formed to cover the lower portion of the rotor 20.
  • a punching die (or a punching blade) has a protruding end called a burr on the punching side, while the punching die has a penetrating side.
  • An obtuse angled crushed surface (R surface) is formed on the surface.
  • the sag and burr are peculiar to the stamped product, and can be made somewhat inconspicuous depending on the structure of the stamping die and the stamping conditions, but cannot be eliminated altogether. Also, the overhanging portion of the burr can be easily removed by barrel treatment or the like, but the sag surface generated by the crushing cannot be eliminated.
  • the intermediate magnetic body 60 one that has been punched by press working or that has been subjected to only a simple barrel treatment after the punching is used. For this reason, on the edge of the intermediate magnetic body 60, an enlarged view and a cross-sectional view (C section) of the portion are shown in the figure.
  • the sagging surface 7 1 and the burrs (or burrs) 72 remain, but the sagging surface 71 is located on the opposite side to the permanent magnet 22. Needless to say, even if the sagging surface is positioned on the permanent magnet side, a suitable effect is exhibited.
  • the magnetic field formation by the intermediate magnetic body 60 is concentrated on the magnetic pole passing surface side on which the burr 72 is formed, rather than on the side on which the sagging surface 71 is formed, thereby further optimizing the magnetic field distribution. Can be.
  • the effect of reducing the detent torque by the positional relationship between the sagging surface 71 and the screw 72 can be obtained also in the magnetic pole portions 3a1, 3a2, 3b1, 3b2 of the stator yokes 3a, 3b. be able to.
  • the stator yokes 3a and 3b like the intermediate magnetic body 60, can be formed easily and at low cost by stamping a soft magnetic and ferromagnetic thin metal plate such as permalloy, SUY, or SPC into a predetermined shape by pressing. Can be formed.
  • stator yokes 3a and 3b that have been punched by this press working or that have been subjected to only simple barrel processing after punching have their cross-sectional shapes (sections in the direction of arrow B) as shown in the figure.
  • a sagging surface 7 1 and burrs (or burrs) 7 2 are formed.
  • the sagging surface 71 is positioned on the opposite side to the intermediate magnetic body 60 to improve the detent torque reduction effect by optimizing the magnetic field distribution. Can be.
  • the width ends 73 of the magnetic pole portions 3a1, 3a2, 3b1, 3b2 of the stator yokes 3a, 3b are sharpened. It is effective to make the pin angle loose. This is because the magnetic field distribution is optimized by setting the pin angle. However, such pin angles cannot usually be formed by stamping with a press due to the structure of the mold. Therefore, when the stator yokes 3a and 3b used in the present invention are formed by punching from a ferromagnetic metal thin plate, the punching process is performed on the magnetic pole portions 3a1, 3a2, 3b1, and 3b2. This is done separately for the contour part that forms the tip surface (the surface facing the magnetic pole) and the other contour parts.
  • the above-mentioned pin angle can be formed at the intersection of the two punched contour lines.
  • the above-mentioned stepping motor has a configuration that is effective for reducing detent torque by using a shape that is stamped by press working or a shape that simply performs simple barrel processing after punching. be able to. As a result, the detent torque can be efficiently reduced while improving productivity and cost performance.
  • the stator yoke and the intermediate magnetic material punched by a press are formally used as they are or only in barrel processing. However, in order to remove distortion due to processing stress and to restore the magnetic properties of the soft magnetic material, magnetic annealing is performed. Processing may be performed.
  • FIG. 2 shows a configuration example in which the above-described stepping motor is incorporated in a case 10 together with a speed reduction mechanism composed of a plurality of gears.
  • the rotation output of the stepping motor is taken out from the rotation shaft 24 of the permanent magnet 22.
  • the rotational output is the first small gear 25 connected to the shaft 24 (coaxial connection), the first large gear 26 coupled to the first small gear 25, and the first large gear
  • the second small gear 27 connected to the second small gear 27 and the second large gear 28 connected to the second small gear 27 sequentially transmit the reduction gear, and finally the second small gear 28 is connected to the second large gear 28.
  • FIG. 3 shows an embodiment of a stepping motor with a speed reduction mechanism according to the second aspect of the present invention.
  • FIG. 3 shows a plan view of the inside of the motor (FIG. 3 ⁇ ) and a cutaway view (FIG. .
  • the stepping motor shown in the figure has a rotor 20, a stator 30, and a gear reduction mechanism (25 to 28) incorporated in a thin resin casing 10 having a substantially circular contour. I have.
  • the configurations of the rotor 20, the stator 30, and the gear reduction mechanism (25 to 28) are the same as those described with respect to the first embodiment of the present invention, and thus detailed description will be omitted.
  • Each of the gears 25 to 28 is a resin molded product, and the first small gear 25 is rotatably supported with the rotor 20.
  • This first small gear 25, as shown in FIG. It is integrally formed on one end (upper end) side of the substantially cylindrical resin boss member 80.
  • the first large gear 26 and the second small gear 27 are integrally formed with each other, and are rotatably supported by the shaft so as to be engaged with the first small gear 25 and the second large gear 28, respectively.
  • FIG. 4 shows an embodiment of the boss member 80, and in particular, shows a side view (FIG. 4A), a cross-sectional view (FIG. 4B), and a perspective view (C direction, FIG. 4C) of the whole.
  • the boss member 80 is an insert molded product integrated with the rotor 20 made of a permanent magnet during resin molding.
  • a through shaft hole 82 is formed in the cylindrical shaft center of the boss member 80.
  • the rotation support shaft 24 of the rotor 20 is fitted into the through shaft hole 82.
  • the support shaft 24 rotatably supports the rotor 20 integral with the boss member 80 and the first small gear 25.
  • the support shaft 24 is erected at a predetermined position in the case 10 (FIG. 1B).
  • a positioning portion 84 is formed in a body.
  • the positioning portion 84 is formed in a circular base protruding from the other end of the boss member 80.
  • a regular hexagonal groove that is concentric with the rotation center of the rotor 20 is formed in the base. The hexagonal groove is formed so that it can be used as a positioning reference in the rotation direction when fixing the boss member 80 to the jig.
  • the jig is used for positioning and fixing when the rotor 20 is multipolarly magnetized.
  • FIGS. 5A to 5C show the positional relationship between the positioning portion 84 formed on the boss member 80 and the first small tooth wheel 25.
  • the positioning portion 84 has a fixed positional relationship (angle) with respect to the gear teeth 25 a of the first small gear 25 formed integrally with one end of the boss member 80. ) Is formed. More specifically, as shown in the figure, one of the vertices of the regular hexagon of the positioning portion 84 coincides with the peak of the peak (or valley) of the gear tooth 25a (corresponding to the position). . Then, the rotor 20 is multipolar magnetized with the peak of the peak (or valley) of the gear teeth 25a as a position reference (angle).
  • FIG. 6A to 6C show a setup state when performing multipolar magnetization of the rotor 20 insert-molded integrally with the boss member 80.
  • Polar magnetization is performed using a magnetizing device 94 in a state where the boss member 80 integrated with the rotor 20 is fixed to a jig 92.
  • Multipolar magnetization by the magnetizing device 94 is performed in a fixed positional relationship with respect to the jig 92.
  • a fixed positioning state is ensured between the jig 92 and the boss member 80 by the positioning part 84.
  • the multipolar magnetization of the rotor 20 is always performed in a fixed positional relationship with the gear teeth of the first small gear 25.
  • the magnetic poles of the multi-polarized rotor 20 and the gear teeth of the reduction gear (the first small gear 25) rotating integrally with the rotor 20 rotating integrally with the rotor 20. And a certain positional relationship is formed. According to the inventor's knowledge, this positional relationship is significantly involved in smooth rotation and low noise, and it has been found that optimization of the rotation can achieve smoother rotation and low noise. did.
  • the rotor 20 is step-rotated by the application of the pulse drive current, and the rotation torque of the rotor 20 is determined by the magnetic pole of the rotor 20 and the magnetic poles of the stator yokes 3a and 3b. Due to the positional relationship between them, it fluctuates at a certain angle and generates torque ripple under the influence of detent torque. Although detent tonnolec can be reduced by optimizing the magnetic circuit structure, it is inevitable that some will remain. In order to make the rotation of the rotor 20 smooth, it is effective to make the drive current sinusoidal. However, since the detent torque remains slightly, the rotation angle in each energization step (microstep) becomes uneven. Occurs. As a result, it is inevitable that the rotation amount of the rotor 20 fluctuates depending on the rotation position of the rotor 20 and every one energization step.
  • the meshing between the gear teeth in the reduction gear mechanism has to take into account fluctuations in environmental conditions such as mechanical accuracy and temperature that can be actually obtained. Designed for For this reason, when the rotor rotates greatly where the meshing of the gear teeth becomes dense, the meshing of the gear teeth becomes There is a large difference in the amount of transmission of rotation between the case where the rotor rotates greatly in a sparse place, and when viewed from the output shaft 29 side, the movement becomes awkward when moving large or small.
  • the boss member 80 is made of an elastic resin such as TPEE (polyester thermoplastic elastomer), the sound of the rotor 20 hitting the support shaft 24 and the first small gear 25 and the The hitting sound between the first large gears 26, which corresponds to the above, can also be effectively buffered and reduced, thereby further reducing noise.
  • TPEE polyter thermoplastic elastomer
  • gear teeth of gears can be used as positioning parts.However, gear teeth of resin gears such as TPEE are flexible and easily deformed or damaged. Not suitable for mechanical positioning. However, if positioning means using non-mechanical means such as optical reading can be used, the gear teeth of a gear can be used as a positioning reference.
  • the positioning portion 84 may be not a hexagonal groove but a hexagonal protrusion or a polygon other than a hexagon.
  • a stepping motor capable of efficiently reducing detent torque while improving productivity and cost. Also, in a stepping motor that outputs the rotation of a rotor composed of multi-pole magnetized permanent magnets by decelerating the rotation with a gear, the inherent characteristics of the stepping motor, such as the ability to position the hands by open loop control, may be impaired. At the same time, smoother rotation and lower noise can be realized with good reproducibility.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Cette invention concerne un moteur pas-à-pas, caractérisé en ce qu'un corps magnétique intermédiaire magnétiquement indépendant des étriers de stator latéraux est disposé entre deux étriers adjacents de stator en un point spécifié où le corps magnétique est proximalement opposé à la surface de passage des pôles magnétiques d'un aimant permanent. Le corps magnétique s'obtient par estampage d'une tôle ferromagnétique, les faces repoussées obtenues par estampage étant positionnées sur le côté opposé de l'aimant permanent. Un pignon est relié co-axialement à un rotor et une relation de position déterminée est établie entre les dents du pignon et le pôles magnétiques du rotor.
PCT/JP2002/012669 2001-12-04 2002-12-03 Moteur pas-a-pas WO2003049261A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001-370559 2001-12-04
JP2001370559A JP4031930B2 (ja) 2001-12-04 2001-12-04 ステッピングモータ
JP2001-370558 2001-12-04
JP2001370558A JP4072336B2 (ja) 2001-12-04 2001-12-04 ステッピングモータ

Publications (1)

Publication Number Publication Date
WO2003049261A1 true WO2003049261A1 (fr) 2003-06-12

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PCT/JP2002/012669 WO2003049261A1 (fr) 2001-12-04 2002-12-03 Moteur pas-a-pas

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WO (1) WO2003049261A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0366575U (fr) * 1989-11-01 1991-06-27
JPH062468Y2 (ja) * 1984-02-27 1994-01-19 株式会社精工舎 小型ステップモ−タ
JPH06284680A (ja) * 1993-03-31 1994-10-07 Seikosha Co Ltd 時計用モータのステータの製造方法
US5959378A (en) * 1994-08-10 1999-09-28 Echkhart W. Haller Electromagnetic, two-phase pulse motor with two rotation directions
JP3134160B2 (ja) * 1991-06-06 2001-02-13 ムービング マグネット テクノロジーズ エス．アー． 低コストステッピングまたはシンクロモーター

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH062468Y2 (ja) * 1984-02-27 1994-01-19 株式会社精工舎 小型ステップモ−タ
JPH0366575U (fr) * 1989-11-01 1991-06-27
JP3134160B2 (ja) * 1991-06-06 2001-02-13 ムービング マグネット テクノロジーズ エス．アー． 低コストステッピングまたはシンクロモーター
JPH06284680A (ja) * 1993-03-31 1994-10-07 Seikosha Co Ltd 時計用モータのステータの製造方法
US5959378A (en) * 1994-08-10 1999-09-28 Echkhart W. Haller Electromagnetic, two-phase pulse motor with two rotation directions

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