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WO1998005114A1 - Moteur pas a pas - Google Patents

Moteur pas a pas Download PDF

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Publication number
WO1998005114A1
WO1998005114A1 PCT/JP1997/001701 JP9701701W WO9805114A1 WO 1998005114 A1 WO1998005114 A1 WO 1998005114A1 JP 9701701 W JP9701701 W JP 9701701W WO 9805114 A1 WO9805114 A1 WO 9805114A1
Authority
WO
WIPO (PCT)
Prior art keywords
annular
rotor
pole teeth
yokes
yoke
Prior art date
Application number
PCT/JP1997/001701
Other languages
English (en)
Japanese (ja)
Inventor
Kouichi Satoh
Hiroyasu Numaya
Kouichi Jinushi
Original Assignee
Nippon Seiki Co., Ltd.
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 Nippon Seiki Co., Ltd. filed Critical Nippon Seiki Co., Ltd.
Publication of WO1998005114A1 publication Critical patent/WO1998005114A1/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
    • H02K37/18—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 of homopolar type

Definitions

  • the present invention relates to a so-called permanent magnet type stepping motor, and more particularly to a stepping motor useful as a movement of an analog indicating instrument.
  • S are alternately magnetized at a constant pitch
  • the annular stator is formed with a plurality of pole teeth extending from the yoke into the hollow and facing the rotor magnetic poles in an annular comb-shaped arrangement with a constant pitch.
  • a yoke including pole teeth is magnetized by supplying a pulse signal to the excitation coil, and the rotor is rotated by a predetermined rotation angle by a magnetic action between the pole teeth and the magnetic poles of the rotor.
  • an analog indicating instrument such as a speedometer or an engine tachometer.
  • this type of stepping motor when used as a moving element of an analog indicating indicator, it is connected and fixed through a rotor, a pointer and a rotating shaft, and the rotor linked with the pointer is pulsed according to the measured amount.
  • the former using the speed reduction mechanism is disadvantageous in terms of productivity because the motor itself becomes larger and the number of parts increases, which is disadvantageous in terms of productivity.
  • problems such as brushing.
  • the latter micro-step drive the intermittent operation of the rotor (pointer) is visually observed by finely step-driving the mouth to a predetermined number of divisions. It is possible to alleviate the force to a level that does not cause discomfort due to the force; due to the imbalance of the magnetic circuit formed at each step between the magnetic pole of the rotor and the yoke including the pole teeth, etc.
  • the rotational angular velocity of the rotor tends to vary at each step, and the smoothness of the rotor operation is not sufficient.To ensure sufficient smoothness, the excitation coil must be Need to correct the pulse signal waveform itself according to the rotor operation
  • the present invention has been made in view of these points, and its purpose is to improve the smoothness of the rotation operation of the rotor itself by devising the pole teeth structure of the yoke, and to move the analog-to-analog indicating instrument.
  • it is possible to obtain the rotation of the pointer without feeling uncomfortable without using a deceleration mechanism, and when micro-step driving, stepping that requires almost no modification of the drive signal waveform DISCLOSURE OF THE INVENTION Which Does Not Provide a Motor
  • the present invention provides a combination of two sets of inner and outer yokes, and first and second annular bobbins on which first and second excitation coils are wound, respectively.
  • a rotor having a rotating shaft is rotatably supported in a hollow portion of a laminated body formed by concentrically laminating the annular stators, and the rotor is rotatably supported in each of the first and second annular stators.
  • a plurality of pole teeth which extend from the outer yoke into the hollow portion and are opposed to the rotor with an annular comb-like arrangement, are formed. The length of the pole teeth is determined by the length between the inner and outer yokes. Approximately 75 to 90% of the height dimension, the root width of the pole tooth is approximately 60 to 80% of the pole formation pitch, and the tip width of the pole tooth is approximately the inner and outer yoke plate thickness of approximately 6 to 80%. 0 ⁇ !
  • FIG. 1 is an external perspective view of a stepping motor according to an embodiment of the present invention
  • FIG. 2 is an exploded cross-sectional view of FIG. 1
  • FIG. 3 is a cross-sectional view of FIG. 1
  • FIG. FIG. 5 is a waveform diagram showing a waveform of a Hals signal supplied to an excitation coil
  • FIG. 6 is a table showing a rotation operation characteristic of a rotor.
  • FIG. 1] is a perspective view of the outer appearance of the stepping motor according to the embodiment of the present invention
  • FIG. 2 is an exploded sectional view showing the internal configuration of FIG. 1
  • FIG. 3 is a sectional view of FIG.
  • the steering motor according to the present embodiment includes a first and second annular stators 1 and 2, a rotor 4 having a rotating shaft 3 as a center, and a rotatably supported shaft through the rotating shaft 3. The first, the first
  • a first annular stator 1 has a first annular bobbin 12 in which a first exciting coil 11 is wound in an annular shape and has a hollow inside, and an annular shape having a through hole in the center.
  • the third annular bobbin 1′ ⁇ is disposed in a housed state between the outer and inner yokes 13 and 14, so that the outer and inner yokes 13 and 14 have the thickness of the first rectangular bobbin i2.
  • the outer and inner yokes 13 and 14 are provided with pole teeth 15 and 15 along the axial direction of the rotating shaft 3 of the rotor 4 on the periphery of each through hole. 16 are formed by a plurality of fixed hitches, and these pole teeth 15 and 1 are alternately combined in the hollow of the first annular bobbin 12 to form an annular comb-shaped arrangement. It has a row shape so that it faces the peripheral surface of the rotor 4.
  • the second annular stator 2 also has a structure similar to that of the first annular stator 1, and includes a second annular bobbin 22 having a second exciting coil 21 wound in an annular shape and having a hollow inside.
  • a cup-shaped outer work 23 formed in an annular shape having a through hole in the center, and a flat plate having a through hole in the center and arranged on the opening side of the outer yoke 23.
  • the second annular bobbin 22 is disposed in a housed state between the outer and inner yokes' 2: 5, 24, thereby forming the outer and inner yokes 2; , 24 are concentrically opposed to each other with an interval corresponding to the thickness of the second annular bobbin 22, and the rotation of the rotor 4 is also provided around the through-holes of the outer and inner yokes 2: 24.
  • Braid And has an annular comb-teeth arrangement so as to face the peripheral surface of the rotor 4.
  • the first and second annular stators 1.2 are arranged along the axis of the rotation axis' 3 of the rotor 4 so that the inner casings 14 and 24 are adjacent to each other.
  • annular stators 1 and 2 having a hollow portion S at the center
  • the rotor 4 rotates the first and second cylindrical magnets 41 and 42 made of, for example, magnets in a concentric manner and separated from each other through a magnet holder 4.
  • a plurality of magnetic poles extending in the axial direction of the rotating shaft 3 are alternately N and S at a constant pitch along the rotating direction on the peripheral surface of the first and second magnets 41, 42.
  • the magnetic pole phases in the magnets 41 and 42 match each other:
  • the rotor 4 is housed in the hollow portion S of the annular stator 1 and 2 laminates,
  • the first and second bearing plates 5 and 6 fixed to the annular stators 1 and 2 are rotatably held through first and second bearing plates 5 and 6, and the magnetic poles of the magnets 41 and 42 are connected to the inner and outer yokes 13 respectively. , 14, 2, 2, 4 oppose the pole teeth 15, 16, 25, 26 with a predetermined space (see Fig. 3) r —
  • FIG. 4 is an exploded view of the stators 1 and 2.
  • the pole teeth 15, 16, 25, and 26 are all formed in the same isosceles trapezoidal shape.
  • the length 11 in the rotation axis 3 direction to the tip of 6, 25, '26 is the length between the inner surfaces of the paired inner and outer yokes 14, 1, 1a, 24, 2, 2, ⁇ .
  • Root width in the rotating direction of the rotor 4 of the pole teeth 15, 16, 25, 26 set in the range of about 75 to 90% of the dimension H 0 and in the shape of an isosceles trapezoid Are the inner peripheral dimensions of the inner and outer yokes 14, 1, 2, 24, respectively.
  • the pole tooth forming hitches I) of the pole teeth 15, 16, 25, 26 at each of the inner and outer yokes 14, 1: 5, 24, 23 are The arrangement phases of the pole teeth 15 and 16 and the pole teeth 25 and 26 constituting each set are shifted in the direction of rotation of the 2P rotor 4, and are further shifted by ⁇ / 2P.
  • the arrangement phases of the pole teeth 15 and 16 and the pole teeth 25 and 26 (that is, the phases of the first and second stators 1 and 2) are shifted in the rotation direction of the rotor 2P. Therefore, the farthest pole tooth 1 ⁇ > and the pole tooth 26 will be displaced in the rotation direction of the rotor 4 by 1 / 4 ⁇ .
  • a drive circuit (not shown) supplies a Hals signal (voltage) having a waveform as shown in FIG. 5, for example, to the first and second excitation coils 11.2.11.
  • This Hals signal is generated by a mechanical step operation (mechanical operation) determined by the pitch ⁇ of the pole teeth 15, 16, 2, 2 of the outer and inner yokes 12, 1, 23, 24.
  • SIN and COS waveforms which are typical approximate waveforms for operating a micro-step (a rotation angle obtained by dividing a mechanical rotation angle into a predetermined number) by so-called micro-step driving
  • the micro-step drive enables the rotor 4 to rotate in the forward and reverse directions at a predetermined rotation angle determined according to the number of divisions.
  • Fixed and drive circuit By performing micro-step drive according to the measured amount of both speeds, etc., it can be used as a movement of an analog instrument
  • the value of the smoothness of 10% or less is, for example, rotation.
  • Axis The Sutetsu ping motor mounted guidance when used as a Ana port grayed formula indicating instrument for Mubume emissions Bok, Ru der which a measure (lower limit) that does not feel uncomfortable with rotation of the pointer.
  • first and second annular stators 1 and 2 are provided in combination with the first and second annular bobbins 12 and 22, and the annular stators 1 and 2 are concentrically laminated.
  • a rotor 4 having a rotating shaft 3 is rotatably supported in a hollow portion S of the body, and inner and outer yokes 14, 13, 24, 2 are respectively mounted on the first and second annular stators 1, 2.
  • Length dimension ⁇ for inner and outer yokes 14, Length between inner surfaces of 24, 23 Approximately 75% to 90% of ⁇ 0, pole teeth 15, 16, 25, 26
  • the root width W1 of the pole teeth is approximately 60 to 8 ()% of the pole tooth formation hitch ⁇ , pole teeth 15, 1 ⁇ , 25,
  • the tip width dimension W2 of 26 is approximately 60 to ⁇ 50% of the plate thickness dimension of the inner and outer yokes 14, 1, 24, and 23, the rotation of the rotor 4 is smooth.
  • the movement of the analog indicating instrument In the case of using a micro-step, it is possible to obtain a smooth and accurate rotation of the pointer without a sense of incongruity without using a deceleration mechanism. Industrial availability that can reduce the need for
  • the present invention has been described using a two-phase or four-phase permanent magnet type stepping motor as an example.
  • the present invention is not limited to this, and a single-phase or four-phase or more multi-phase permanent magnet type stepping motor is used. It can be applied to the structure of

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

L'invention concerne un moteur pas à pas dont le fonctionnement silencieux du rotor a été amélioré. Un premier stator annulaire (1) est constitué d'une culasse interne (14), d'une culasse externe (13) et d'une bobine annulaire (12) entourée d'un enroulement. Un second stator annulaire (2) est constitué d'une culasse interne (24), d'une culasse externe (23) et d'une bobine annulaire (22) entourée d'un enroulement. Les deux stators annulaires sont assemblés de manière concentrique. Le rotor (4) est tourillonné dans la partie creuse (S) de la structure empilée. Des dents polaires (15, 16) d'une forme approximativement trapézoïdale sont agencées sous forme d'un peigne annulaire, sur les culasses interne et externe de façon à faire face au rotor. Des dents polaires similaires (25, 26) de forme approximativement trapézoïdale sont également agencées sous forme d'un peigne annulaire sur les culasses interne et externe de façon à faire face au rotor. La hauteur (H) de chaque dent polaire représente entre 75 et 90 % la distance (HO) comprise entre la surface latérale interne de la culasse interne et la surface latérale interne de la culasse externe. La largeur (W1) de la base de chaque dent polaire représente entre 60 et 80 % le pas (P) de la dent. La largeur (W2) de l'extrémité de chaque dent polaire représente entre 60 et 150 % l'épaisseur (T) des culasses interne et externe.
PCT/JP1997/001701 1996-07-26 1997-05-20 Moteur pas a pas WO1998005114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/196821 1996-07-26
JP19682196A JPH1042541A (ja) 1996-07-26 1996-07-26 ステッピングモータ

Publications (1)

Publication Number Publication Date
WO1998005114A1 true WO1998005114A1 (fr) 1998-02-05

Family

ID=16364230

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/001701 WO1998005114A1 (fr) 1996-07-26 1997-05-20 Moteur pas a pas

Country Status (2)

Country Link
JP (1) JPH1042541A (fr)
WO (1) WO1998005114A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101017990B (zh) * 2006-02-08 2011-06-22 株式会社电装 具有简化结构的电动机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101121674B1 (ko) * 2009-12-15 2012-02-28 엘지이노텍 주식회사 스텝 모터
JP6463646B2 (ja) * 2015-02-26 2019-02-06 日本電産サンキョー株式会社 ステッピングモータ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136553A (ja) * 1987-11-20 1989-05-29 Sanyo Electric Co Ltd ステツピングモータ
JPH089621A (ja) * 1994-06-16 1996-01-12 Nippondenso Co Ltd ステップモータ
JPH08205510A (ja) * 1995-01-23 1996-08-09 Seiko Epson Corp ステッピングモーター
JPH0928072A (ja) * 1995-07-12 1997-01-28 Minebea Co Ltd モータ構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136553A (ja) * 1987-11-20 1989-05-29 Sanyo Electric Co Ltd ステツピングモータ
JPH089621A (ja) * 1994-06-16 1996-01-12 Nippondenso Co Ltd ステップモータ
JPH08205510A (ja) * 1995-01-23 1996-08-09 Seiko Epson Corp ステッピングモーター
JPH0928072A (ja) * 1995-07-12 1997-01-28 Minebea Co Ltd モータ構造

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101017990B (zh) * 2006-02-08 2011-06-22 株式会社电装 具有简化结构的电动机

Also Published As

Publication number Publication date
JPH1042541A (ja) 1998-02-13

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