JPH0511784U - Stepping motor - Google Patents
Stepping motorInfo
- Publication number
- JPH0511784U JPH0511784U JP5807191U JP5807191U JPH0511784U JP H0511784 U JPH0511784 U JP H0511784U JP 5807191 U JP5807191 U JP 5807191U JP 5807191 U JP5807191 U JP 5807191U JP H0511784 U JPH0511784 U JP H0511784U
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- stepping motor
- permanent magnet
- cylindrical permanent
- magnetic flux
- 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
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 ロストルクの低減ができると共に小型化可能
で安価な構成ができるステッピングモータを提供する。
【構成】 ＰＭ型ステッピングモータにおいて回転子１
０ａの１つの円筒状永久磁石１１ａの軸方向の一部分を
調整着磁、又は無着磁化し、２組のステータ部のヨーク
極歯部以外の部分と対向する回転子の部分の磁束密度を
図の軸方向表面磁束分布１２ａの如く弱くする。これに
よりこの部分のロストルクが低減でき、トルク特性及び
振動特性の向上が図れる。
(57) [Summary] (Correction) [Purpose] To provide a stepping motor that can reduce loss torque, can be downsized, and can be constructed at low cost. [Structure] Rotor 1 in PM type stepping motor
The magnetic flux density of the rotor portion facing the portions other than the yoke pole tooth portions of the two sets of stator portions by adjusting or non-magnetizing one axial portion of one cylindrical permanent magnet 11a of 0a is illustrated. The surface magnetic flux distribution 12a is weakened. As a result, the loss torque in this portion can be reduced, and the torque characteristics and vibration characteristics can be improved.
Description
【０００１】[0001]
本考案はビデオカメラ等に用いるレンズ駆動装置や、フロッピーディスクのヘ ッド駆動装置，各種ＯＡ機器駆動装置等に関するものである。 The present invention relates to a lens driving device used for a video camera, a floppy disk head driving device, and various OA equipment driving devices.
【０００２】[0002]
近年、機器の軽薄短小化に伴いその駆動用ステッピングモータも同様に小型と なり、モータとしての体積効率向上が求められている。 In recent years, along with the trend toward lighter, thinner, shorter, and smaller devices, the drive stepping motors have also become smaller, and there is a demand for improved volumetric efficiency as a motor.
【０００３】 以下、従来のＰＭ型ステッピングモータついて図面を参照しながら説明する。 図５は従来のＰＭ型ステッピングモータであり、第一のボビン１にリング状のコ イル２が巻かれ、そのボビン端面を一対のヨーク３ａ，３ｂによりおおわれ、ヨ ーク内周面には櫛歯状の極歯が配列されてなる第一のステータ部５ａと、第一の ステータ部と同様にしてなる第二のステータ部５ｂとから構成されるステータを 重ね合わせてモータフレーム６内に収め、上記２組のステータの内側のヨーク極 歯部４ａ，４ｂに対向して回転自在な外周に複数の着磁をほどこした１つの円筒 状永久磁石７を備えた回転子８を有した構成である。A conventional PM type stepping motor will be described below with reference to the drawings. FIG. 5 shows a conventional PM type stepping motor in which a ring-shaped coil 2 is wound around a first bobbin 1, the end surface of the bobbin is covered with a pair of yokes 3a and 3b, and the inner peripheral surface of the yoke is a comb. A stator composed of a first stator portion 5a in which tooth-shaped pole teeth are arranged and a second stator portion 5b formed in the same manner as the first stator portion are stacked and housed in the motor frame 6. The rotor 8 is provided with a single cylindrical permanent magnet 7 having a plurality of magnetized magnets on its outer circumference which faces the yoke pole teeth 4a and 4b inside the two sets of stators and is rotatable. is there.
【０００４】 また図６は、上記従来モータに使用されている１つの円筒状永久磁石７を備え た回転子８の軸方向の表面磁束分布９を表わしたものであり、軸方向に一様に着 磁されている。FIG. 6 shows a surface magnetic flux distribution 9 in the axial direction of a rotor 8 equipped with one cylindrical permanent magnet 7 used in the conventional motor described above, which is uniform in the axial direction. It is magnetized.
【０００５】 上記構成において、各ステータ部のコイルに逐次通電することによりヨークの 櫛歯状極歯が励磁され、これと対向する複数の着磁をほどこした回転子の吸引又 は反発により回転子が回転する。In the above structure, the comb-teeth pole teeth of the yoke are excited by sequentially energizing the coils of each stator, and a plurality of magnetized opposing rotors are attracted or repelled to cause rotor rotation. Rotates.
【０００６】[0006]
このような従来のＰＭ型ステッピングモータでは、ステータ部ヨークの極歯部 以外でこれと対向する回転子の磁束により発生トルクに寄与せずに、ディテント トルクだけを増加し、モータ効率の悪化を招いていた。 In such a conventional PM type stepping motor, the detent torque is increased without contributing to the generated torque due to the magnetic flux of the rotor opposite to the pole tooth part of the stator yoke, and the motor efficiency is deteriorated. Was there.
【０００７】 この対策として従来の他の例では、回転子の着磁をほどこした円筒状永久磁石 を２分割し、ロストルク発生部を無くした構成のモータもあるが構成上コスト高 となり、またモータのマグネット製造上小型化が難しいという問題があった。As another countermeasure against this, in another conventional example, there is a motor having a structure in which a cylindrical permanent magnet having a magnetized rotor is divided into two parts and a loss torque generating part is eliminated, but the cost is high in the structure, and the motor is expensive. There was a problem that it was difficult to miniaturize the magnet manufacturing.
【０００８】 本考案は上記課題を解決するもので、ロストルクを低減した小型のＰＭ型ステ ッピングモータを提供することを目的としている。The present invention solves the above problems, and an object thereof is to provide a small PM type stepping motor with reduced loss torque.
【０００９】[0009]
本考案は上記目的を達成するために、回転子を１つの円筒状永久磁石で構成し 円筒状永久磁石の軸方向の一部分を調整着磁、又は無着磁化したものである。 In order to achieve the above-mentioned object, the present invention is one in which a rotor is composed of one cylindrical permanent magnet, and a part of the cylindrical permanent magnet in the axial direction is adjusted magnetized or non-magnetized.
【００１０】[0010]
本考案は上記した構成により、ＰＭ型ステッピングモータのロストルクの低減 ができると共に構成が簡単なため安価なモータができる。 According to the present invention, the loss torque of the PM type stepping motor can be reduced by the configuration described above, and at the same time, the cost can be reduced because the configuration is simple.
【００１１】[0011]
以下、本考案の第１の実施例について図１を参照しながら説明する。 Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
【００１２】 図１において、１０ａはＰＭ型ステッピングモータの本考案の回転子で、本体 であるＰＭ型ステッピングモータの構成は従来と同様であり、前記従来と同じ部 分の説明は省略する。この回転子１０ａにおける円筒状永久磁石１１ａの軸方向 の一部分を調整着磁、又は無着磁し、図５に示す２組のステータ部５ａ，５ｂの ヨーク極歯部４ａ，４ｂ以外でこれと対向する回転子の軸方向表面磁束分布を弱 くし、図１のような軸方向表面磁束分布１２ａとした構成である。このように本 考案の実施例のＰＭ型ステッピングモータによれば、回転子を１つの円筒状永久 磁石の安価な構成とすることができ、２組のステータ部のヨーク極歯部以外でこ れと対向する回転子の磁束で発生するロストルクの低減が図れる。In FIG. 1, reference numeral 10a denotes a PM type stepping motor rotor according to the present invention. The structure of the PM type stepping motor, which is the main body, is the same as the conventional one, and the description of the same parts as those of the conventional one will be omitted. A part of the cylindrical permanent magnet 11a in the rotor 10a in the axial direction is magnetized or non-magnetized, and the two parts other than the yoke pole tooth parts 4a and 4b of the two stator parts 5a and 5b shown in FIG. This is a configuration in which the axial surface magnetic flux distribution of the opposing rotors is weakened to form the axial surface magnetic flux distribution 12a as shown in FIG. As described above, according to the PM type stepping motor of the embodiment of the present invention, the rotor can be configured as one cylindrical permanent magnet at a low cost, and the rotors other than the two yoke pole tooth portions of the two stator portions can be provided. It is possible to reduce the loss torque generated by the magnetic flux of the rotor opposed to.
【００１３】 図２は本考案の第２の実施例を示している。図２において、１０ｂはＰＭ型ス テッピングモータの本考案の回転子で、本体であるＰＭ型ステッピングモータの 構成は従来と同様である。この回転子１０ｂにおける円筒状永久磁石１１ｂの軸 方向の一部分に調整着磁、又は無着磁化をおこない、回転子の軸方向表面磁束分 布を２組のステータ部のそれぞれの中心と対向する位置を中心に前後を弱くし、 図２のような軸方向表面磁束分布１２ｂとした構成である。このように本考案の 実施例のＰＭ型ステッピングモータによれば、回転子を１つの円筒状永久磁石の 安価な構成とすることができ、回転子の磁束で発生するロストルクの低減が図れ 、滑らかな回転が得られる。FIG. 2 shows a second embodiment of the present invention. In FIG. 2, 10b is a rotor of the present invention of a PM type stepping motor, and the structure of the PM type stepping motor, which is the main body, is the same as the conventional one. The rotor 10b is subjected to adjustment magnetization or non-magnetization in a part of the axial direction of the cylindrical permanent magnet 11b so that the axial surface magnetic flux distribution of the rotor faces the centers of the two stator portions. 2 is weakened in the front and back to form an axial surface magnetic flux distribution 12b as shown in FIG. As described above, according to the PM type stepping motor of the embodiment of the present invention, the rotor can be configured with one cylindrical permanent magnet at a low cost, the loss torque generated by the magnetic flux of the rotor can be reduced, and the rotor can be smoothed. You can get a nice rotation.
【００１４】 図３は本考案の第３の実施例を示している。図３において、１０ｃはＰＭ型ス テッピングモータの本考案の回転子で、本体であるＰＭ型ステッピングモータの 構成は従来と同様である。本実施例はこの回転子１０ｃにおける円筒状永久磁石 １１ｃの軸方向の一部分に調整着磁、又は無着磁化をおこない、モータのトータ ル磁気特性を考慮して回転子の軸方向表面磁束分布１２ｃの無着磁部中心位置を ２組のステータ部の中心位置に対し図３のようにずらせて構成したものである。 このように本考案の実施例のＰＭ型ステッピングモータによれば、回転子を１つ の円筒状永久磁石の安価な構成とすることができ、回転子の磁束で発生するロス トルクを図４の特性図に示すように従来仕様に比べ大幅に低減することができ、 滑らかな回転が得られる。FIG. 3 shows a third embodiment of the present invention. In FIG. 3, 10c is a rotor of the present invention of a PM stepping motor, and the structure of the PM stepping motor, which is the main body, is the same as the conventional one. In the present embodiment, a part of the cylindrical permanent magnet 11c in the rotor 10c in the axial direction is subjected to adjustment magnetization or non-magnetization, and the axial magnetic flux distribution 12c of the rotor is taken into consideration in consideration of the total magnetic characteristics of the motor. 3, the center position of the non-magnetized part is displaced from the center positions of the two sets of stator parts as shown in FIG. As described above, according to the PM type stepping motor of the embodiment of the present invention, the rotor can be configured with one cylindrical permanent magnet at a low cost, and the loss torque generated by the magnetic flux of the rotor is shown in FIG. As shown in the characteristic diagram, it can be significantly reduced compared to the conventional specifications, and smooth rotation can be obtained.
【００１５】[0015]
以上の実施例から明らかなように、本考案によれば安価な構成にもかかわらず ロストルクの低減が図れ、トルク特性並びに振動特性の良好なステッピングモー タを提供できる。 As is apparent from the above-described embodiments, according to the present invention, it is possible to provide a stepping motor that can reduce loss torque and that has excellent torque characteristics and vibration characteristics despite its inexpensive structure.
【図１】本考案の第１の実施例のステッピングモータの
回転子及びその軸方向表面磁束分布を示す平面断面図FIG. 1 is a plan sectional view showing a rotor of a stepping motor according to a first embodiment of the present invention and its axial surface magnetic flux distribution.
【図２】本考案の第２の実施例の同平面断面図FIG. 2 is the same plane sectional view of the second embodiment of the present invention.
【図３】本考案の第３の実施例の同平面断面図FIG. 3 is the same plane sectional view of a third embodiment of the present invention.
【図４】本考案の第３の実施例の特性図FIG. 4 is a characteristic diagram of a third embodiment of the present invention.
【図５】ステッピングモータの平面断面図FIG. 5 is a plan sectional view of a stepping motor.
【図６】従来のステッピングモータの回転子及びその軸
方向表面磁束分布を示す同平面断面図FIG. 6 is a sectional plan view showing a rotor of a conventional stepping motor and a surface magnetic flux distribution in the axial direction thereof.
３ａ，３ｂ ヨーク ４ａ，４ｂ ヨーク極歯部 ５ａ，５ｂ ステータ部 ７，１１ 円筒状永久磁石 ８，１０ 回転子 ９，１２ 軸方向表面磁束分布 3a, 3b Yoke 4a, 4b Yoke pole tooth part 5a, 5b Stator part 7,11 Cylindrical permanent magnet 8,10 Rotor 9,12 Axial surface magnetic flux distribution
Claims (1)
れ、前記ボビン端面を相対向する一対のヨークによりお
おわれ、ヨーク内周面には櫛歯状の極歯が配列されてな
る第一のステータ部と第一のステータ部と同様にしてな
る第二のステータ部とから構成されるステータと、外周
に複数の着磁をほどこした円筒状永久磁石を備えた回転
子とで形成されるＰＭ型ステッピングモータにおいて、
前記回転子は１つの円筒状永久磁石から成り、円筒状永
久磁石の軸方向の一部分を調整着磁、又は無着磁化した
ステッピングモータ。[Claim 1] A ring-shaped coil is wound around a first bobbin, and the bobbin end surface is covered with a pair of yokes facing each other, and a comb-shaped pole is formed on the inner peripheral surface of the yoke. A stator composed of a first stator part in which teeth are arranged and a second stator part similar to the first stator part, and a cylindrical permanent magnet having a plurality of magnetized outer circumferences. In the PM type stepping motor formed with the rotor,
The rotor is composed of one cylindrical permanent magnet, and a part of the cylindrical permanent magnet in the axial direction is adjusted and magnetized or non-magnetized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5807191U JPH0511784U (en) | 1991-07-24 | 1991-07-24 | Stepping motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5807191U JPH0511784U (en) | 1991-07-24 | 1991-07-24 | Stepping motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0511784U true JPH0511784U (en) | 1993-02-12 |
Family
ID=13073680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5807191U Pending JPH0511784U (en) | 1991-07-24 | 1991-07-24 | Stepping motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0511784U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142994U (en) * | 1978-03-22 | 1979-10-04 | ||
| JPS6167736U (en) * | 1984-10-11 | 1986-05-09 | ||
| JPS63100038U (en) * | 1986-12-22 | 1988-06-29 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251352A (en) * | 1988-08-10 | 1990-02-21 | Minebea Co Ltd | Stepping motor |
-
1991
- 1991-07-24 JP JP5807191U patent/JPH0511784U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251352A (en) * | 1988-08-10 | 1990-02-21 | Minebea Co Ltd | Stepping motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54142994U (en) * | 1978-03-22 | 1979-10-04 | ||
| JPS6167736U (en) * | 1984-10-11 | 1986-05-09 | ||
| JPH038283Y2 (en) * | 1984-10-11 | 1991-02-28 | ||
| JPS63100038U (en) * | 1986-12-22 | 1988-06-29 |
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