JPS59191468A - Step motor - Google Patents
Step motorInfo
- Publication number
- JPS59191468A JPS59191468A JP6322583A JP6322583A JPS59191468A JP S59191468 A JPS59191468 A JP S59191468A JP 6322583 A JP6322583 A JP 6322583A JP 6322583 A JP6322583 A JP 6322583A JP S59191468 A JPS59191468 A JP S59191468A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- pipe
- magnetic pole
- pole pieces
- step 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.)
- Pending
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ステップモータに関し、特にインナーロータ
型小電力用ステップモータに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a step motor, and more particularly to an inner rotor type small power step motor.
従来例の構成とその問題点
近年、ステップモータの産業界への進出には目ざましい
ものがあり、とりわけ、小型ステップモータｄ：、マイ
クロブ１）ンタ、マイクロプロッタ等の駆動用モータと
して利用されている。Conventional configurations and their problems In recent years, step motors have made remarkable advances in the industrial world, and in particular, small step motors are being used as drive motors for micrometers, microplotters, etc. .
以下、第１図〜第３図を参照しながら、従来のステップ
モータについて説明を行なう。図面にて示すように、ス
テ〜り部は主として、後述する外ヨーク１と内ヨーク２
および、それらの間に収容されるコイル３とからなり、
これらが２組積層結合されている。前記外ヨーク１は第
３図にて示すように内周縁から軸方向に多数の歯状極片
１ａを一定間隔毎に立設した形状である。また内ヨーク
２は外ヨーク１と同様の形状となっており内周縁には歯
状磁極片２ａを有する。Hereinafter, a conventional step motor will be explained with reference to FIGS. 1 to 3. As shown in the drawings, the stay section mainly consists of an outer yoke 1 and an inner yoke 2, which will be described later.
and a coil 3 accommodated between them,
Two sets of these are laminated and bonded. As shown in FIG. 3, the outer yoke 1 has a shape in which a large number of tooth-shaped pole pieces 1a are erected at regular intervals from the inner peripheral edge in the axial direction. The inner yoke 2 has the same shape as the outer yoke 1, and has tooth-like magnetic pole pieces 2a on its inner peripheral edge.
コイル３は外ヨーク１と内ヨーク２０間に挿入されてお
り、外ヨーク１と内ヨーク２はその磁極片１ａと２ａが
互いに食い違い合うような状態で嵌合される。このよう
な嵌合体２組を内ヨーク２同志が背中合せとなり、かつ
、それらの磁極片１２Ｌ 、２ａが磁極開角度の％だけ
っｔり第３図中ｅ１だけずれるような角度で組合せられ
る。The coil 3 is inserted between the outer yoke 1 and the inner yoke 20, and the outer yoke 1 and the inner yoke 2 are fitted in such a manner that their magnetic pole pieces 1a and 2a are offset from each other. Two sets of such fitting bodies are assembled at an angle such that the inner yokes 2 are placed back to back and their magnetic pole pieces 12L, 2a are offset by e1 in FIG. 3, which is exactly % of the magnetic pole opening angle.
ロータ部は主として、後述するシャフト４と環状永久磁
石５とからなっていて、前記組合せ体の中央１９］Ｓの
中空部内に収容されている。前記環状永久磁石５は、第
２図に示すように多極着磁されている。The rotor section mainly consists of a shaft 4 and an annular permanent magnet 5, which will be described later, and is housed in a hollow section at the center 19]S of the combination. The annular permanent magnet 5 is multi-pole magnetized as shown in FIG.
前記のような構成において、コイル３にパルス電流を供
給することにより生じる起磁力によりスデップ状に変位
する。In the above configuration, the coil 3 is displaced in a stepped manner due to the magnetomotive force generated by supplying a pulse current to the coil 3.
さて、ステータヨークの形状については、従来このよう
に、内周縁から軸方向に多数の歯状磁極片を一定間隔毎
に突設した形状となっており、寸だ、ロータ部について
は、ステータヨークの内部に収容されている。しかしな
がら、上記のような構成では、ステップモータの外径を
小さくするという小型化を図る場合、ロータ■１夕の外
径にコイルが巻いであると、それだけで外径が大きくな
り、前記形状で、外形を小さくしようとすると、コイル
の巻数が減少し、それゆえ、！・ルクのイ色下につなが
るという問題点を有していた。Now, regarding the shape of the stator yoke, conventionally it has a shape in which a large number of tooth-shaped magnetic pole pieces are protruded from the inner peripheral edge in the axial direction at regular intervals. is housed inside. However, with the above configuration, when downsizing the step motor by reducing the outer diameter, if the coil is wound around the outer diameter of the rotor, the outer diameter will increase by itself, and the shape described above will not work. , if we try to reduce the profile, the number of turns in the coil will decrease, and therefore!・There was a problem in that it connected to Ruku's iiroshita.
発明の目的
本発明は、上記従来の問題点に留意し、ステータヨーク
を改良することにより、外径を榎度に小さくできるステ
ップモータを提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to provide a step motor whose outer diameter can be made as small as possible by improving the stator yoke, taking into consideration the above-mentioned conventional problems.
発明の構成
前記目的を達成するため本発明は、外周部に一定間隔毎
に歯状磁極片を立設した外ヨークと、前記歯状磁極片の
長さを短かくした形状で、前記外ヨークと同一方向を向
いて組合せられる内ヨークと、前記外ヨークと前記内ヨ
ークを磁路として結ぶだめのパイプと、前記パイプと前
記外ヨークとの間に収容されるコイルとから成るステー
タ部と、前記ステータ部の歯状磁極片だけにより、両側
か・ら包み込才れるロータ部を備えたステップモータの
構成としたものであり、この構成により、外径の小型化
を可能にし、トルクの増加を図り、モータ外径に対して
ステップ数の多いものを容易に得ることができるもので
ある。Structure of the Invention In order to achieve the above-mentioned object, the present invention includes an outer yoke having tooth-shaped magnetic pole pieces erected at regular intervals on the outer periphery, and a shape in which the length of the tooth-shaped magnetic pole pieces is shortened. a stator portion comprising an inner yoke that is combined facing in the same direction as the stator, a pipe that connects the outer yoke and the inner yoke as a magnetic path, and a coil housed between the pipe and the outer yoke; The step motor has a rotor section that is wrapped around from both sides by only the toothed magnetic pole pieces of the stator section, and this structure makes it possible to reduce the outer diameter and increase torque. Therefore, it is possible to easily obtain a motor with a large number of steps relative to the outer diameter of the motor.
実施例の説明
以ｌ・−１本発明の一実施例について第４図〜第６図を
参照しながら説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.
第４図において、ステータ部は外ヨーク６、内ヨーク７
、パイプ８ とコイノＬ／９とからなり、これらが２組
結合されている。外ヨーク６は外周縁から軸方向に多数
の歯状磁極片６ａを一定間隔毎に立設した形状である。In Fig. 4, the stator section includes an outer yoke 6 and an inner yoke 7.
, pipe 8 and Koino L/9, two sets of which are connected. The outer yoke 6 has a shape in which a large number of tooth-shaped magnetic pole pieces 6a are erected at regular intervals from the outer periphery in the axial direction.
内ヨーク７は外ヨーク６とほぼ同形状である７ｉ″；歯
状磁極片７ａを歯状磁極片６ａより短かくした形状であ
る。・４イブ８は、外ヨーク６と内ヨーク７を磁路とし
て結ぶだめのものであり、このパイプ８にシャフト１ｏ
が通っている。コイル９は外ヨーク６とノシイブ８の間
に挿入されている。前記外ヨーク６と内ヨーク７は互い
に食い違い合うような状態で・シイプ８を介して結合さ
ね、るが、前記歯状磁極片＋３！Ｌ、７ａは向かい合う
形状ではなく、同一方向を向いた形状となっている。こ
のような嵌合体２組を第６図に示すように前記歯状磁極
片６ａ 、７ａが磁極角度の％だけずれるような角度で
、なおかつ、ロータ１１を前記歯状磁極片６ａ、７ａだ
けにより、両側から包み込む方式で組合せる。The inner yoke 7 has almost the same shape as the outer yoke 6 7i''; the toothed magnetic pole piece 7a is shorter than the toothed magnetic pole piece 6a. The four-way yoke 8 connects the outer yoke 6 and the inner yoke 7 with the magnetic It is a pipe that is connected as a pipe, and a shaft 1o is attached to this pipe 8.
is passing through. The coil 9 is inserted between the outer yoke 6 and the nozzle 8. The outer yoke 6 and the inner yoke 7 are connected to each other via a shaft 8 in a state where they are offset from each other, but the toothed magnetic pole piece +3! L and 7a do not have shapes facing each other, but have shapes facing the same direction. As shown in FIG. 6, these two sets of fitted bodies are arranged at an angle such that the toothed magnetic pole pieces 6a and 7a are deviated by % of the magnetic pole angle, and the rotor 11 is supported only by the toothed magnetic pole pieces 6a and 7a. , combine by wrapping from both sides.
以上のように、本実施例によれば、歯状磁極片５ａ、７
Ｎをステータヨークの内周縁でなく、外周縁より立設す
ることにより、ステップモータの外径は、ロータ径、エ
アギャップ、カバーの厚さを同一とすると考えた場合、
ロータ部の外側に内部にコイルを装填したステータ部を
設けてなる従来のものに比べ、コイルの厚みの分だけ薄
型化でき前記歯状磁極片の厚さの分だけですむことにな
る。As described above, according to this embodiment, the toothed magnetic pole pieces 5a, 7
By erecting N from the outer circumferential edge of the stator yoke instead of the inner circumferential edge, the outer diameter of the step motor is assumed to be the same as the rotor diameter, air gap, and cover thickness.
Compared to the conventional structure in which a stator section with a coil loaded inside is provided outside the rotor section, the stator section can be made thinner by the thickness of the coil, and only the thickness of the toothed magnetic pole piece is required.
なお、前記実施例において、パイプ８は外ヨーク６と内
ヨーク７」；り独立させた１ケの部品としだが、外ヨー
ク６あるいは内ヨーク了と一体にしてもよい。In the embodiment described above, the pipe 8 is made up of a single component with the outer yoke 6 and the inner yoke 7 separated from each other, but it may be integrated with the outer yoke 6 or the inner yoke.
発明の効果
以上のように、本発明は歯状磁極片をステータヨークの
外周縁より突設することにより、ステップモークの外径
を小さくするという小型化を図る場合、小型化するのに
非常に有利で、容易に組立てやすく、斗だ、トルクの増
大、あるいは、モータ外径にχｔ Ｉ、てステノブ数の
多いものを容易に得ることができ、その効果は犬なるも
のである０Effects of the Invention As described above, the present invention is extremely effective in downsizing when the outer diameter of the step moke is reduced by providing toothed magnetic pole pieces protruding from the outer periphery of the stator yoke. It is advantageous and easy to assemble, and it is easy to increase the torque or increase the number of steering knobs on the outer diameter of the motor, and the effect is amazing.
第１図ｄ］従来のステップモータの断面図、第２図シ１
．第１図の矢印Ａ−Ａ’断面図、第３図は第２図の矢印
Ｂ−Ｂ’断面図、第４図は本発明の一実施例のステップ
モ・−夕の断面図、第５図は内ヨークと外ヨークとパイ
プの組立図、第６図はステータ部イｊｊ１１面図である
。
６・・−・・外ヨーク、７ ・・・・内ヨーク、９・・
・・・・コイル、１Ｑ・・・・ンヤフト、８・・・・・
パイプ、１１・・・ロータ、６ａ、７２Ｌ・・−・・・
歯状磁極片。
代Ｉ′ｌｊｊ人の氏名 弁理士 中 尾 敏 男 ほか
１名第１図
Δ
第６図
血Fig. 1 d] Cross-sectional view of a conventional step motor, Fig. 2 d]
．． 1, FIG. 3 is a sectional view taken along arrow BB' in FIG. 2, FIG. 4 is a sectional view of a step motor according to an embodiment of the present invention, and FIG. 6 is an assembled view of the inner yoke, outer yoke, and pipe, and FIG. 6 is an 11-side view of the stator section. 6...Outer yoke, 7...Inner yoke, 9...
...Coil, 1Q...Nyaft, 8...
Pipe, 11... Rotor, 6a, 72L...
Toothed pole piece. Name of representative: Patent attorney Toshio Nakao and one other person Figure 1 Δ Figure 6 Blood
Claims (2)
間隔毎に第１の歯状磁極片を立設させ７外ヨークとなし
、第２の環状部材の外周面よシ垂直にしかも一定間隔毎
に、前記第１の歯状磁極片の長さより短い第２の歯状磁
極片を立設させて内ヨークとなし前記の外ヨークと前記
内ヨークの内周縁を連絡したパイプと、前記外ヨークと
ｉ１記内ヨークとの間に収容されたコイルとより成るス
テータ部を、２つ内ヨーク同志を背合わせし、前記ステ
ータ部内部には、ロータ部を備えたことを特徴とするス
テップモータ。(1) First tooth-shaped magnetic pole pieces are vertically provided at regular intervals from the outer circumferential surface of the first annular member to form an outer yoke, and a pipe connecting the inner periphery of the outer yoke and the inner yoke, wherein second tooth-shaped magnetic pole pieces shorter than the length of the first tooth-shaped magnetic pole pieces are erected at regular intervals to form an inner yoke; A stator section comprising a coil housed between the outer yoke and the inner yoke i1 is arranged with the two inner yokes back to back, and a rotor section is provided inside the stator section. step motor.
記外ヨークと、一体に形成したことを特徴とする特許請
求の範囲第１項記載のステップモータ。(2) The step motor according to claim 1, wherein the pipe is integrally formed with the inner yoke or the outer yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6322583A JPS59191468A (en) | 1983-04-11 | 1983-04-11 | Step motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6322583A JPS59191468A (en) | 1983-04-11 | 1983-04-11 | Step motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59191468A true JPS59191468A (en) | 1984-10-30 |
Family
ID=13223050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6322583A Pending JPS59191468A (en) | 1983-04-11 | 1983-04-11 | Step motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59191468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636381U (en) * | 1992-10-05 | 1994-05-13 | 日本ミニモーター株式会社 | Stepping motor |
-
1983
- 1983-04-11 JP JP6322583A patent/JPS59191468A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636381U (en) * | 1992-10-05 | 1994-05-13 | 日本ミニモーター株式会社 | Stepping motor |
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