JPS6122751A - Stepping motor - Google Patents
Stepping motorInfo
- Publication number
- JPS6122751A JPS6122751A JP59141770A JP14177084A JPS6122751A JP S6122751 A JPS6122751 A JP S6122751A JP 59141770 A JP59141770 A JP 59141770A JP 14177084 A JP14177084 A JP 14177084A JP S6122751 A JPS6122751 A JP S6122751A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- rotor
- stepping motor
- magnetic
- poles
- 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕本発明はプリンタ、りをすること
が要求されるステッピングモータに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stepping motor that is required to operate a printer.
〔従来技術と問題点〕従来のこの種のモータを第５図お
よび第６図について説明する。第５図は永久磁石回転子
（第６図）を備えた従来のステッピングモータを示して
いる。ｌは装置に固定される取付板、２は取付板ｌに保
持されたメタル、８はモーター底板４に保持されたメタ
ルで、メタル２．８によって回転軸５が回転自在に支持
されている。回転軸５には円筒状の回転子磁石（永久磁
石）６がスペーサ７を介して固着され、回転子を構成し
ている。８ａ、 ８ｂ、 ９ａ。[Prior Art and Problems] A conventional motor of this type will be explained with reference to FIGS. 5 and 6. FIG. 5 shows a conventional stepping motor with a permanent magnet rotor (FIG. 6). 1 is a mounting plate fixed to the device, 2 is a metal held on the mounting plate 1, 8 is a metal held on the motor bottom plate 4, and the rotary shaft 5 is rotatably supported by the metal 2.8. A cylindrical rotor magnet (permanent magnet) 6 is fixed to the rotating shaft 5 via a spacer 7 to constitute a rotor. 8a, 8b, 9a.
９ｂは回転子磁石６と空隙をおいて対向する固定子磁極
歯を有する固定子ヨーク群で、コイルボビン１０．１１
に巻回された２相分の環状コイル１２．１８と共に固定
子を構成している。回転子磁石６の外表面には第６図に
示すように、固定子磁極−の磁極に合せてＮ、Ｓの多極
着磁が施されておシ、この磁極の数によってステップの
角度が決定される。9b is a stator yoke group having stator magnetic pole teeth facing the rotor magnet 6 with a gap therebetween, and coil bobbin 10.11.
Together with the two-phase annular coils 12 and 18 wound around the stator. As shown in Fig. 6, the outer surface of the rotor magnet 6 is magnetized with N and S multi-poles to match the stator magnetic poles, and the step angle is determined by the number of magnetic poles. It is determined.
ところで上記従来のステッピングモータにおいて、ステ
ップの角度を小さくするためには回転子磁石の着磁ピン
チを小さくすればよいがとの着磁ピッチには限界があっ
て一般のステツピングモータにおいては、最小のステッ
プ角度は７．５度が限度であシ、ステップ角度をそれ以
上小さくするためには回転子の径を犬にするよりほかに
方法はない。しかしステッピングモータが大聖化するこ
とはこれを取付けて使用する機器の側からは不利であり
、また、大型のステッピングモータは小型のステッピン
グモータよシもステップ角度の実質的な精度が低い。By the way, in the above-mentioned conventional stepping motor, in order to reduce the step angle, it is necessary to reduce the magnetization pinch of the rotor magnet, but there is a limit to the magnetization pitch, and in a general stepping motor, the minimum The maximum step angle is 7.5 degrees, and the only way to make the step angle smaller than that is to make the rotor diameter narrower. However, the popularity of stepping motors is disadvantageous from the perspective of the equipment to which they are attached and used, and large stepping motors have substantially lower step angle accuracy than small stepping motors.
角度で高精度の動作をすることのできるステッピングモ
ータを提供することを目的とするものである。The object of the present invention is to provide a stepping motor that can operate with high precision in angles.
〔発明の構成〕本発明のステッピングモータは、所定の
ピッチで設けた多数のく、シ麿磁極を有する複数個の固
定子ヨークと、この複数個の固定子ヨークに結合される
各相用の複数個の環状固定子コイルとによって固定子を
構成し、前記クシ鹵磁極と対向するようその表面に所定
のピッチで凹溝と凸条とを交互に設けて前記凹溝に樹脂
磁石を充填した磁性体を回転子とすることを特徴とする
。[Structure of the Invention] The stepping motor of the present invention includes a plurality of stator yokes having a large number of parallel magnetic poles arranged at a predetermined pitch, and a plurality of stator yokes for each phase coupled to the plurality of stator yokes. A stator is constituted by a plurality of annular stator coils, and grooves and protrusions are alternately provided on the surface at a predetermined pitch so as to face the comb magnetic poles, and the grooves are filled with resin magnets. It is characterized by using a magnetic material as a rotor.
本発明の実施例を第１図ないし第４図について説明する
。本発明のステッピングモータの回転子は、第２図に示
すように、回転軸１４に円筒形の磁性体１５を固定して
形成されておシ、磁性体１５の円周面には一定のピッチ
で凹溝１６と突！！＝ １６’が交互に設けられ、凹溝
１６には樹脂磁石（粉末磁石を樹脂によって成形）１７
を充填して磁極を形成している。第１図は第２図の回転
子と対向する２相用の固定子を示している。この固定子
は、軸方向の断面形状がコ型の磁性体よりなり、その内
周面に一定のピッチで設けたくし曙磁極１９ａを有する
固定子ヨーク１８ａと、前記＜シ幽磁極１９ａと交互に
入シこむ同様なくし点磁極１９ｂを有するリング状の磁
性体よｐなる閉磁路ヨーク１８ｂと、ボビン２１に巻装
された環状固定子コイル２０と、前記固定子ヨーク１８
ａと同様な、くシ鹵磁極２８ａを有する固定子ヨーク２
２ａと、前記閉磁路ヨーク１８ｂと同様なくシー磁極２
８ｂを有する閉磁路ヨーク２２ｂと、ボビン２５に巻装
された環状固定子コイル２４とよりなり、環状固定コイ
ル２０は固定子ヨーク１８ａと閉磁路ヨーク１８ ｂと
の間に、環状固定子コイル２４は固定子ヨーク２２ａと
閉磁路ヨーク２２ｂとの間にそれぞれはめこまれて固定
子を構成する。２６．２７はコイル引出線の保護ブツシ
ュ２８．２９をはめこむ切欠である。Embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIG. As shown in FIG. 2, the rotor of the stepping motor of the present invention is formed by fixing a cylindrical magnetic body 15 to a rotating shaft 14, and the circumferential surface of the magnetic body 15 has a constant pitch. So it hits the concave groove 16! ! = 16' are provided alternately, and resin magnets (powder magnets molded with resin) 17 are placed in the grooves 16.
are filled to form magnetic poles. FIG. 1 shows a two-phase stator facing the rotor shown in FIG. 2. FIG. This stator is made of a magnetic material having a U-shaped cross section in the axial direction, and has a stator yoke 18a having combed magnetic poles 19a provided at a constant pitch on its inner circumferential surface, and the stator yoke 18a having alternating magnetic poles 19a. A closed magnetic path yoke 18b made of a ring-shaped magnetic material having similar comb-point magnetic poles 19b, an annular stator coil 20 wound around a bobbin 21, and the stator yoke 18
Stator yoke 2 having comb magnetic poles 28a similar to a
2a, and a sea magnetic pole 2 similar to the closed magnetic path yoke 18b.
8b, and an annular stator coil 24 wound around a bobbin 25. are respectively fitted between the stator yoke 22a and the closed magnetic circuit yoke 22b to form a stator. 26 and 27 are notches into which protective bushings 28 and 29 of the coil lead wire are fitted.
第８図は固定子と回転子の磁気的な相対関係を示してい
る。固定子コイル２０を励磁すると、くし鹵磁極１９ａ
、 １９ｂはそれぞれＮ極、Ｓ極となって固定子磁界を
形成する。一方、回転子僅、界は磁性体１５の凹溝１６
に充填した樹脂１７の極性と凸条１６’の極性が異なる
ように樹脂磁石１７に着磁しである。すなわち、樹脂磁
石１７はその外表面側の極性が同極（Ｎ極）となるよう
着磁される。FIG. 8 shows the relative magnetic relationship between the stator and rotor. When the stator coil 20 is excited, the comb magnetic pole 19a
, 19b serve as N poles and S poles, respectively, to form a stator magnetic field. On the other hand, when the rotor is small, the field is the concave groove 16 of the magnetic body 15.
The resin magnet 17 is magnetized so that the polarity of the resin 17 filled in the resin 17 and the polarity of the protrusions 16' are different. That is, the resin magnet 17 is magnetized so that its outer surface has the same polarity (N pole).
第４図は固定子ヨークの磁極の構成を示している。図中
の角度９０°〜８６０°は電気角である。FIG. 4 shows the configuration of the magnetic poles of the stator yoke. The angles 90° to 860° in the figure are electrical angles.
くし肉磁極１９ａと１９ｂおよび２８ａと２８ｂとは電
気角で１８０°の位置にある。また、クシ−磁極１９ｂ
と２８ｂとは電気角で９０°の位置、すなわち１９ａと
１９ｂおよび２８ａと２８ｂとの磁極間ピッチの半分だ
けずらした位置にある。The comb magnetic poles 19a and 19b and 28a and 28b are located at 180 degrees in electrical angle. In addition, the comb magnetic pole 19b
and 28b are located at 90 degrees in electrical angle, that is, shifted by half the pitch between the magnetic poles of 19a and 19b and 28a and 28b.
〔発明の効果〕本発明のステッピングモータは以上の構
成を有するので固定子コイル２０ヲ励磁するとくシ鹵磁
極１９ａ、 １９ｂはそれぞれＮ極、Ｓ極となり、との
Ｎ、 ８極に対応する位置に回転子の凸条１６’と樹脂
磁石１７を吸引する。そして励磁を固定子コイル２０か
ら固定子コイルＨに切換えるとくシ鹵磁極１９ａ、１９
ｂは消磁してくし鹵磁極２８ａ、 ２８ｂがそれぞれＮ
極、Ｓ極となシ、このＮ、 Ｓ極に対応する位置に回転
子磁石を吸引してステップ回転をする。[Effects of the Invention] Since the stepping motor of the present invention has the above configuration, when the stator coil 20 is excited, the magnetic poles 19a and 19b become N and S poles, respectively, and the positions corresponding to the N and 8 poles are The protrusions 16' of the rotor and the resin magnets 17 are attracted to each other. Then, when the excitation is switched from the stator coil 20 to the stator coil H, the magnetic poles 19a, 19
b is demagnetized so that the comb magnetic poles 28a and 28b are respectively N.
The rotor magnets are attracted to the positions corresponding to the north and south poles, and the rotor magnets are rotated in steps.
本発明の回転子は第６図の従来のＮＳ着磁の磁石回転子
と異なυ、磁極は磁性体１５に機械的工作によシ凸溝１
６と凸条１６’とを設けることに極を形成することがで
きるので、その結果ステツピングモータの精度を向上し
、かつ小型化することが可能になる。また、樹脂磁石１
７の飽和磁束密度以上の着磁磁場で着磁を行なうことに
よって磁界強度のむらをなくすることができる。The rotor of the present invention is different from the conventional NS magnetized magnet rotor shown in FIG.
Since the poles can be formed by providing the protrusions 6 and 16', the precision of the stepping motor can be improved and the stepping motor can be made smaller. In addition, resin magnet 1
By performing magnetization with a magnetizing magnetic field having a saturation magnetic flux density of 7 or more, it is possible to eliminate unevenness in the magnetic field strength.
さらに回転角度の精度およびトルク特性を向上するため
に回転子と固定子との間の空隙を一定にする研削処理が
回転体の表面に行なわれるが、その際に、凸条１６′に
発生するパリを容易に除去することができるなど、いく
だのすぐれた効果を有する。Furthermore, in order to improve rotation angle accuracy and torque characteristics, a grinding process is performed on the surface of the rotating body to make the gap between the rotor and stator constant, but at that time, ridges 16' are formed. It has excellent effects such as being able to easily remove paris.
第１Ｎ：本発明のステッピングモータの固定子の分解斜
視図
第２図二本発明のステッピングモータの回転子の斜視図
第８図二本発明のステッピングモータの固定子磁極と回
転子磁極の相対図
第４図：本発明のステッピングモータの固定子磁極の展
開図
第５図：従来のステッピングモータの断面図斜視図
１４・・・回転軸、１５・・・磁性体、１６・・・凹溝
、１６′・・・凸条、１７・・・樹脂磁石、１８ａ・・
・固定子ヨーク、１８ｂ・・・閉磁路ヨーク、１９ａ、
１９ｂ・・・くし鹵磁極、２０・・・固定子コイル、
２１・・・ボビン、２２ａ・・・固定子ヨーク、２２ｂ
・・・閉磁路ヨーク、２８ａ％２８ｂ・・・くし鹵磁極
、２４・・・固定子コイル、２５・・・ボビン、ｚ６．
２７・、・・切欠、２８．２９・・・保護ブツシュ第１
図
第２図1N: An exploded perspective view of the stator of the stepping motor of the present invention. Figure 2.2 A perspective view of the rotor of the stepping motor of the present invention. Figure 8.2 A relative view of the stator magnetic poles and rotor magnetic poles of the stepping motor of the present invention. Fig. 4: Developed view of stator magnetic poles of the stepping motor of the present invention Fig. 5: Cross-sectional view and perspective view of a conventional stepping motor 14...rotating shaft, 15...magnetic material, 16...concave groove, 16'...Convex strip, 17...Resin magnet, 18a...
- Stator yoke, 18b...Closed magnetic path yoke, 19a,
19b... Comb magnetic pole, 20... Stator coil,
21... Bobbin, 22a... Stator yoke, 22b
... Closed magnetic circuit yoke, 28a% 28b ... Comb magnetic pole, 24 ... Stator coil, 25 ... Bobbin, z6.
27...notch, 28.29...protective bushing 1st
Figure 2
Claims (1)
の固定子ヨークと、この複数個の固定子ヨークに結合さ
れる各相用の複数個の環状固定子コイルとによって固定
子を構成し、前記くし鹵磁極と対向するようその表面に
所定のピッチで凹溝と凸条とを交互に設けて前記凹溝に
樹脂磁石を充填した磁性体を回転子とすることを特徴と
するステッピングモータThe stator is composed of a plurality of stator yokes having a large number of comb magnetic poles arranged at a predetermined pitch, and a plurality of annular stator coils for each phase coupled to the plurality of stator yokes. , a stepping motor characterized in that the rotor is a magnetic material in which concave grooves and convex stripes are alternately provided at a predetermined pitch on the surface facing the comb magnetic poles, and the concave grooves are filled with resin magnets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59141770A JPS6122751A (en) | 1984-07-09 | 1984-07-09 | Stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59141770A JPS6122751A (en) | 1984-07-09 | 1984-07-09 | Stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6122751A true JPS6122751A (en) | 1986-01-31 |
Family
ID=15299766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59141770A Pending JPS6122751A (en) | 1984-07-09 | 1984-07-09 | Stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6122751A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01164258A (en) * | 1987-12-17 | 1989-06-28 | Canon Inc | Stepping motor |
| EP0341833A2 (en) * | 1988-05-10 | 1989-11-15 | Rover Group Limited | A power assisted steering system for a motor vehicle and control means therefor |
| JPH0236760A (en) * | 1988-07-27 | 1990-02-06 | Toshiba Corp | Stepping motor |
| JPH04344161A (en) * | 1991-05-20 | 1992-11-30 | Shinko Electric Co Ltd | Rotating pulse motor |
| JPH04344162A (en) * | 1991-05-20 | 1992-11-30 | Shinko Electric Co Ltd | Rotating pulse motor |
| JP2003020057A (en) * | 2001-07-09 | 2003-01-21 | Sumitomo Chem Co Ltd | Lid body of liquid agricultural chemical or liquid fertilizer vessel integrated with measuring vessel |
-
1984
- 1984-07-09 JP JP59141770A patent/JPS6122751A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01164258A (en) * | 1987-12-17 | 1989-06-28 | Canon Inc | Stepping motor |
| EP0341833A2 (en) * | 1988-05-10 | 1989-11-15 | Rover Group Limited | A power assisted steering system for a motor vehicle and control means therefor |
| EP0341833A3 (en) * | 1988-05-10 | 1992-10-21 | Rover Group Limited | A power assisted steering system for a motor vehicle and control means therefor |
| JPH0236760A (en) * | 1988-07-27 | 1990-02-06 | Toshiba Corp | Stepping motor |
| JPH04344161A (en) * | 1991-05-20 | 1992-11-30 | Shinko Electric Co Ltd | Rotating pulse motor |
| JPH04344162A (en) * | 1991-05-20 | 1992-11-30 | Shinko Electric Co Ltd | Rotating pulse motor |
| JP2003020057A (en) * | 2001-07-09 | 2003-01-21 | Sumitomo Chem Co Ltd | Lid body of liquid agricultural chemical or liquid fertilizer vessel integrated with measuring vessel |
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