JPS5883576A - Stepping motor - Google Patents
Stepping motorInfo
- Publication number
- JPS5883576A JPS5883576A JP17921681A JP17921681A JPS5883576A JP S5883576 A JPS5883576 A JP S5883576A JP 17921681 A JP17921681 A JP 17921681A JP 17921681 A JP17921681 A JP 17921681A JP S5883576 A JPS5883576 A JP S5883576A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- rotor
- projections
- pole plate
- stepping motor
- 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.)
- Granted
Links
- 230000004043 responsiveness Effects 0.000 abstract description 2
- 230000004323 axial length Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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
- H02K37/02—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type
- H02K37/06—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type with rotors situated around the stators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Lens Barrels (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、回転軸の軸線を含む平面内において磁気回路
を構成するユニポーラ形のステッピングモータに関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a unipolar stepping motor that configures a magnetic circuit within a plane that includes an axis of a rotating shaft.
従来、ユニポーラ形のステッピングモータでは、固定よ
に一対の歯部と該歯部の間に巻回されたコイルとを1組
として回転軸方向へ縦列的に3釦設け、回転子には前記
固定子の3対の歯部に対応する歯部をそれぞれ位相を1
/3ピツチずつずらせて配置し、前r固定子のコイルを
順次励磁することによって前記回転子を前記歯部のピッ
チの1/3ずつ歩進させるものが知られている。Conventionally, in a unipolar stepping motor, a pair of fixed teeth and a coil wound between the teeth are provided as a set, and three buttons are provided in tandem in the direction of the rotation axis, and the rotor is provided with three buttons arranged in tandem in the direction of the rotation axis. Set the phase of each of the teeth corresponding to the three pairs of teeth of the child to 1.
It is known to move the rotor by 1/3 of the pitch of the teeth by sequentially exciting the coils of the front r stator.
上述した従来のステッピングモータでは、南部を回転子
及び固定子にそ外ぞれ3対形成しなければならず、形状
、構造が複雛であつな。したがって、上記3対の歯部を
縦列的に配設する為に回転軸線方向の長さが長くなね、
また、歯部を互いて対向配置させる構造である為に外径
が大きくなるという欠点があっ六。In the above-mentioned conventional stepping motor, three pairs of southern parts must be formed on the rotor and the stator, and the shape and structure are complex. Therefore, in order to arrange the three pairs of teeth in tandem, the length in the direction of the rotation axis is long.
In addition, since the tooth portions are arranged opposite each other, there is a drawback that the outer diameter becomes large.
本発明は、上述の欠点に鑑み、固定子には隣接する磁極
板の突起の一部が互いに回転軸線方向へ重なり合う様に
配設された複数個の磁極板と、該磁極板の間に配置され
たコイルと、回転子にけ前配電なり合う部分の円弧長さ
に対応する円弧長さの極歯を形成し、以って形状、構造
を単純にしたステッピングモータを提供せんとするもの
である。In view of the above-mentioned drawbacks, the present invention provides a stator with a plurality of magnetic pole plates arranged such that some of the protrusions of adjacent magnetic pole plates overlap each other in the direction of the rotation axis, and a stator arranged between the magnetic pole plates. It is an object of the present invention to provide a stepping motor whose shape and structure are simplified by forming pole teeth with a circular arc length corresponding to the circular arc length of the coil and the portion where the power is distributed before the rotor.
以下、本発明を用いた一実施例について、図面を参照し
て詳細に説明する。第1図は本発明を用いたステッピン
グモータの原理的な構成を示す断皿
視図、第2図は一部切断して示す≠面図、第3図は作動
説明図である。これらのv面において、1は中空状のス
テータ軸、2は前記ステータ軸1に固着された複数個の
磁極板で、そねそれの磁極板21.22,23.24に
は半径方向へ突出する4個の突起21 a 、22 a
+ 23 a e 24 aがそれぞれ90c′毎に
一体的に形成されており、第1の磁極板21には開角が
300の突起21aが形成され、第2の磁極板22には
開角6ぽの突起22aが形成され、第3の磁極板23に
は開角6fの突起f3aが形成され、第4の磁極板24
には開角が3デの突起24aがそれぞれ形成されている
。Hereinafter, one embodiment using the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the basic structure of a stepping motor according to the present invention, FIG. 2 is a partially cutaway side view, and FIG. 3 is an operation explanatory view. In these V planes, 1 is a hollow stator shaft, 2 is a plurality of magnetic pole plates fixed to the stator shaft 1, and each of the magnetic pole plates 21, 22, 23, 24 has a radially protruding portion. Four protrusions 21a, 22a
+ 23 a e 24 a are integrally formed every 90 c', the first magnetic pole plate 21 has a protrusion 21 a with an opening angle of 300, and the second magnetic pole plate 22 has a projection 21 a with an opening angle of 6. A protrusion f3a with an opening angle of 6f is formed on the third magnetic pole plate 23, and a protrusion f3a with an opening angle of 6f is formed on the third magnetic pole plate 23.
A protrusion 24a having an opening angle of 3° is formed on each of the protrusions 24a.
即ち、第1の磁極板21の突起21a及び第4の磁極板
24の突起24aの円弧長さと、第2の磁極板22の突
起22a及び第3の磁極板23の突起23aの円弧長さ
との比が1:2匠なっている。That is, the arc length of the projection 21a of the first magnetic pole plate 21 and the projection 24a of the fourth magnetic pole plate 24, and the arc length of the projection 22a of the second magnetic pole plate 22 and the projection 23a of the third magnetic pole plate 23. The ratio is 1:2.
前記第1の磁極板21の突起21aはそれぞれ第2の磁
極板22の突起22aの左方部分22azと回転軸線方
向に重なり合い、前記第2の磁極板′22の突起223
の右方部分22a、はそれぞれ第3の磁極板23の突起
23aの左方部分23雫1と回転軸線方向に重々り合い
、前記第3の磁極板23の突起23aの右方部分23a
、は第4の磁極板24の突起24aと回転軸線方向に重
なり合っていZo
3.4.5はそれぞれ前記第1〜第4の磁極板21.2
2,23.24の間に配設された第1〜第3のコイルで
図示しない制御装置によって順次励磁されている。6は
前記磁極板2の外周に僅かな空隙を介して近接配置され
、前記ステータ軸1と相対的に回転し得る様に取付けら
れたリング状の回転子で、前記第1〜第4の磁極板21
,22.23.24が配列さt1fc回転軸線方向の長
さより長く、且つ前記磁極板2の突起が重なり合う部分
の円弧長さに対応する円弧長さ、即ち開角で30°の4
つの極歯6aがそれぞれ9デ間隔で形成されている。The protrusions 21a of the first magnetic pole plate 21 overlap the left portions 22az of the protrusions 22a of the second magnetic pole plate 22 in the rotational axis direction, and the protrusions 223 of the second magnetic pole plate '22
The right portion 22a of the third magnetic pole plate 23 overlaps the left portion 23a of the projection 23a of the third magnetic pole plate 23 in the rotation axis direction, and the right portion 23a of the projection 23a of the third magnetic pole plate 23
, overlap the protrusion 24a of the fourth magnetic pole plate 24 in the direction of the rotation axis, and Zo3.4.5 correspond to the first to fourth magnetic pole plates 21.2, respectively.
The first to third coils disposed between the coils 2, 23, and 24 are sequentially excited by a control device (not shown). Reference numeral 6 denotes a ring-shaped rotor that is disposed close to the outer periphery of the magnetic pole plate 2 with a slight gap therebetween and is attached so as to be able to rotate relative to the stator shaft 1, and is connected to the first to fourth magnetic poles. Board 21
.
Two pole teeth 6a are formed at intervals of 9 degrees.
次に作動について説明する。前記コイル3,4゜5への
通電を制御する図示しない制御装置は、公知の如く前記
回1子6に取付けられたマ示しない回転位置検出装置等
からの信号により、前記回転子の停止位置を検出して起
動時にかける歩進の狂いを無くすべく前記コイル3,4
,5の励磁を開始する前記コイル3,4.5を選択し、
あるいは、し
制御回路において停止させたときに励磁÷−71イルを
記憶して起動時に連続した次のコイルから励磁する様に
制御しておし、との様な励磁の制御によって起動時にお
ける一時的な逆回1、及び歩進数の狂いを生ずることな
くステッピングモータを駆動するものである。Next, the operation will be explained. A control device (not shown) that controls the energization of the coils 3, 4.5 determines the stop position of the rotor based on a signal from a rotational position detection device (not shown) attached to the rotor 6, as is well known. The coils 3 and 4 detect the
, 5, select the coil 3, 4.5 to start excitation of the coil 3, 4.5;
Alternatively, when the control circuit is stopped, excitation divided by -71 coils is memorized, and the next coil is energized at startup. This is to drive a stepping motor without causing a reverse rotation 1 or an error in the number of steps.
前記制御装置にtけ@1のコイル3から原に第2のボイ
ル41第3のコイル5へと順次励磁されるモノトすると
、第3図において回転子6が同図(A)に水子位置にあ
るときに、第1のコイルが励磁されると、第1の磁極板
21と第2の磁極板22が磁化され、磁気回路は第1の
磁極板21の突起21aどそれぞれ第2の磁極板22の
突起22aの左方部分22a 1と及び回転子6の極歯
6aとで磁気回路を構成しようとし、該回転子6は同図
(B)に示す様に右回転方向へ吸艙されて1歩進する。When the control device sequentially energizes the first coil 3 to the second coil 41 to the third coil 5, the rotor 6 in FIG. , when the first coil is excited, the first magnetic pole plate 21 and the second magnetic pole plate 22 are magnetized, and the magnetic circuit is connected to the second magnetic pole, such as the protrusion 21a of the first magnetic pole plate 21, respectively. A magnetic circuit is constructed by the left portion 22a1 of the protrusion 22a of the plate 22 and the pole teeth 6a of the rotor 6, and the rotor 6 is absorbed in the clockwise rotation direction as shown in FIG. Take one step forward.
第2の三イー4が励磁されると、l@2の磁極板22の
突起22aの右方部分22a9と第3の磁極板23の突
起23aの左m部分23a1と、及び回転子6の極歯6
aとにより磁気回路を構成しようとし、該極歯6aを吸
引して同図(C)の如く回転子6をさらに1歩鞭だけ右
回転方向へ回転させる。第3のコイルが励磁されると、
上述と同様に、第3の磁極板23の突起2,3aの右方
部分23a、と、第4の磁極板24の突起24aと、回
転子6の極歯6aとによって磁気回路を構成しようとし
、前記極歯6aを吸引して同図(2)の如く回転子6を
さらに一歩進だけ右回転方向へ回転させる。上述した如
く磁極板21 、2223.2♀孝!突起21 a、
22a 、23a 、24aはそれぞれ回転子6の
4個の極歯と互いに作用し合って、該回転子6を1歩進
ずつ右回転方向へ回転させている6また、前記第1〜第
3のコイルを励磁する順序を逆にして第3のコイル5か
ら第2のコイル4.第1のコイル3の順に通電させるこ
とによって容易に逆回転させることができる。When the second three E4 is excited, the right part 22a9 of the protrusion 22a of the magnetic pole plate 22 of l@2, the left m part 23a1 of the protrusion 23a of the third magnetic pole plate 23, and the pole of the rotor 6. tooth 6
a to form a magnetic circuit, and the pole teeth 6a are attracted to rotate the rotor 6 one more step in the clockwise rotation direction as shown in FIG. When the third coil is energized,
Similarly to the above, a magnetic circuit is constructed by the right portion 23a of the protrusions 2 and 3a of the third magnetic pole plate 23, the protrusion 24a of the fourth magnetic pole plate 24, and the pole teeth 6a of the rotor 6. , the pole teeth 6a are attracted and the rotor 6 is further rotated one step in the clockwise rotation direction as shown in FIG. 2(2). As mentioned above, the magnetic pole plate 21, 2223.2♀! Protrusion 21 a,
22a, 23a, and 24a each interact with the four pole teeth of the rotor 6 to rotate the rotor 6 one step at a time in the clockwise direction. The order in which the coils are energized is reversed, from the third coil 5 to the second coil 4. By energizing the first coil 3 in this order, reverse rotation can be easily achieved.
尚、上述したステッピングモータは、前述した一実施例
に限ることなく、例えば、本実施例とは逆に外側に磁極
板2及びコイル3,4.!iを固定し、内側に前記高桜
板2と対向する極歯を有する回転子を配置したものでも
本発明を適用することができる。また、本発明によるス
テッピングモータのステップ角度を小さくするには、固
定子の突起21a、22a、23a、24aのピッチ及
びこれに対応する回転子6の極歯6aのピッチを小さく
して前記突起21a、22a、23a、24a及び極歯
6aの数を増加させることKより、ステップ数が多い高
精度のステッピングモータと干ることが可能である。Note that the above-described stepping motor is not limited to the above-mentioned embodiment, and for example, contrary to the present embodiment, the magnetic pole plate 2 and the coils 3, 4 . ! The present invention can also be applied to a rotor in which i is fixed and a rotor having pole teeth facing the high cherry plate 2 is arranged inside. In addition, in order to reduce the step angle of the stepping motor according to the present invention, the pitch of the protrusions 21a, 22a, 23a, 24a of the stator and the corresponding pitch of the pole teeth 6a of the rotor 6 are reduced to reduce the step angle of the protrusion 21a. , 22a, 23a, 24a and the number of pole teeth 6a, it is possible to achieve the same performance as a high-precision stepping motor with a large number of steps.
本発明を用いたステッピングモータは、回転子6の一部
に窓を開け、残りの部分を極歯として用いることによっ
て回転子の半径方向の厚さを薄くすることができ、固定
子の直径をその分だけ大きくすることができるから、該
固定子の内部に空胴を設けることができる。よって、本
発明によるステッピングモータは、光学器機のレンズに
おけるオートフォーカス又は、オートズーム機構の駆動
源として、前記空胴内部に光学系を配置し、該ステッピ
ングモータにより前記機構を直接的に、あるいは減速機
構を介して駆動させ得るものに適用した場合に前記光学
系と一体的に組込むことができ、小形で且つ緒音等が少
ないから、前述したレンズの附属機構の駆動源として最
適である。In the stepping motor using the present invention, the thickness of the rotor in the radial direction can be reduced by opening a window in a part of the rotor 6 and using the remaining part as pole teeth, and the diameter of the stator can be reduced. Since the stator can be made larger by that amount, a cavity can be provided inside the stator. Therefore, the stepping motor according to the present invention has an optical system disposed inside the cavity as a driving source for an autofocus or autozoom mechanism in a lens of an optical device, and the stepping motor directly or decelerates the mechanism. When applied to something that can be driven via a mechanism, it can be integrated with the optical system, is small, and produces little noise, making it ideal as a drive source for the lens auxiliary mechanism described above.
以上述べた如く、本発明は、回転子に宮を開けたリング
状の回転子を用゛いたものであり、直径が大きい割合に
は慣性が小さいから応答性に優れ、直径が大きな部分で
磁気回路を構成するものであるから通電する電流の割合
には回転トルクを大きくすること氷でき、また、回転方
向を任意に制御できるという利点がある。さらに、磁極
板の厚さを小さくすることができる為、回転軸線方向の
長さを短かくすることができるという利点がある。As described above, the present invention uses a ring-shaped rotor with an opening in the rotor, and the large diameter portion has small inertia, so it has excellent responsiveness, and the large diameter portion is magnetic. Since it constitutes a circuit, it has the advantage that the ratio of current supplied can be adjusted by increasing the rotational torque, and the direction of rotation can be controlled arbitrarily. Furthermore, since the thickness of the magnetic pole plate can be reduced, there is an advantage that the length in the rotation axis direction can be shortened.
第1図は、本発明を用いた一実施例の要部構成を示す斜
視図、第2図は一部切断して示した正面図、第3図はそ
れぞれ異なる作動状態で示す作動説明Vである。
1・・・・・・ステータ軸、21・・・・・・第1の磁
極板、21a・・・・・・突起、22・・・・・・第2
の磁極板、22a・・・・・・突起、22a 、・・・
・・・左方部分、22a*・・・・・・右方部分、23
・・・・・・第3の突起、23a・・・・・・突起、2
3al・・・・・・左方部分、23a、・・・・・・右
方部分、24・・・・・・第3の磁極だ、24a・・・
・・・突起、3・・・・・・第1のコイル、4・・・・
・・第2のコイル、5・・・・・・第3のコイル、6・
・・・・・回転子、6a・・・・・・極歯。Fig. 1 is a perspective view showing the main structure of an embodiment using the present invention, Fig. 2 is a partially cutaway front view, and Fig. 3 is an operation explanation V showing different operating states. be. DESCRIPTION OF SYMBOLS 1... Stator shaft, 21... First magnetic pole plate, 21a... Protrusion, 22... Second
magnetic pole plate, 22a...protrusion, 22a,...
...Left part, 22a*...Right part, 23
...Third protrusion, 23a...Protrusion, 2
3al...Left part, 23a...Right part, 24...Third magnetic pole, 24a...
...Protrusion, 3...First coil, 4...
...Second coil, 5...Third coil, 6.
...Rotor, 6a...Pole teeth.
Claims (1)
数個の磁極板に半径方向へ突出させてそれぞれ一体的に
形成され、互いだ隣接する前記磁極板の間で一部分が回
転軸線方向へ重なり合い、且つ前配重なり合う部分が回
転方向へ順次移行する様にそねそれ形成された突起と、
前記磁極板のそねぞれの間に巻回された複数個のコイル
と、前記磁極板のそれぞれの突起の周面に僅かな空隙を
おいて前記磁極板と相対的に回転し得る様に配設され、
前記突起の互いに重なり合う部分の円弧長に対応する円
弧長の極歯を形成した回転子とからなることを特徴とす
るステッピングモータ。A plurality of magnetic pole plates arranged on the same axis at intervals in the direction of the rotation axis are each integrally formed so as to protrude in the radial direction, and portions of the adjacent magnetic pole plates overlap in the direction of the rotation axis. , and protrusions formed so that the overlapping portions of the front portion sequentially move in the rotation direction;
A plurality of coils wound between the twists of the magnetic pole plate and a circumferential surface of each protrusion of the magnetic pole plate are provided with a slight air gap so as to be able to rotate relative to the magnetic pole plate. arranged,
A stepping motor comprising: a rotor having pole teeth having an arc length corresponding to the arc length of the mutually overlapping portions of the projections.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17921681A JPS5883576A (en) | 1981-11-09 | 1981-11-09 | Stepping motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17921681A JPS5883576A (en) | 1981-11-09 | 1981-11-09 | Stepping motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5883576A true JPS5883576A (en) | 1983-05-19 |
JPH0158752B2 JPH0158752B2 (en) | 1989-12-13 |
Family
ID=16061962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17921681A Granted JPS5883576A (en) | 1981-11-09 | 1981-11-09 | Stepping motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5883576A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6399754A (en) * | 1986-10-15 | 1988-05-02 | Haiteku Kenkyusho:Kk | Multi-phase brushless motor |
EP0849867A1 (en) * | 1996-12-21 | 1998-06-24 | Robert Bosch Gmbh | Stepping motor and its application |
WO2001070552A1 (en) * | 2000-03-22 | 2001-09-27 | Robert Bosch Gmbh | Electromechanical wheel brake device |
KR100455262B1 (en) * | 2002-07-10 | 2004-11-06 | 삼성전기주식회사 | Step motor |
US7923880B2 (en) * | 2008-02-28 | 2011-04-12 | Minebea Motor Manufacturing Corporation | Stepping motor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0228550U (en) * | 1988-08-11 | 1990-02-23 |
-
1981
- 1981-11-09 JP JP17921681A patent/JPS5883576A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6399754A (en) * | 1986-10-15 | 1988-05-02 | Haiteku Kenkyusho:Kk | Multi-phase brushless motor |
EP0849867A1 (en) * | 1996-12-21 | 1998-06-24 | Robert Bosch Gmbh | Stepping motor and its application |
WO2001070552A1 (en) * | 2000-03-22 | 2001-09-27 | Robert Bosch Gmbh | Electromechanical wheel brake device |
US6806602B2 (en) * | 2000-03-22 | 2004-10-19 | Robert Bosch Gmbh | Electromechanical wheel brake device |
KR100455262B1 (en) * | 2002-07-10 | 2004-11-06 | 삼성전기주식회사 | Step motor |
US7923880B2 (en) * | 2008-02-28 | 2011-04-12 | Minebea Motor Manufacturing Corporation | Stepping motor |
Also Published As
Publication number | Publication date |
---|---|
JPH0158752B2 (en) | 1989-12-13 |
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