JPS627362A - Ladder type inductor - Google Patents

Abstract

PURPOSE:To make a stator unit thin, by organizing the stator in a ladder type to make inductor teeth only confront a mover, and by making yoke sections smaller than the width of the mover, to be arranged at the side end sections along the moving directions of the mover. CONSTITUTION:To form a ladder type in the advancing direction of a mover 20, yokes 33a, 33b are arranged on the both sides of a stator 30, and a plurality of inductor teeth 31 are fixed at right angles to the yokes and at an equal pitch. The width W33 of the yokes 33a, 33b arranged at both side end sections along the moving direction is set, for example, to be one divided by several numbers of the width W20 of the mover 20. Even if the height h31 of the tooth on the central section of the inductor teeth 31 is made smaller than the height h33 of the tooth at the side end sections, the saturation of magnetic flux is not generated. By said organization, even if the thickness of the stator 30 for a linear motor is reduced, a motor is compacted.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば可動子が電磁石と永久磁石から形成さ
れ固定子が磁性体の誘導子からなるマシンにおける移動
方向と磁束の流れが平行な磁路構成の誘導子の改良に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to a machine in which the mover is formed of an electromagnet and a permanent magnet and the stator is a magnetic inductor, for example, in which the direction of movement and the flow of magnetic flux are parallel to each other. This paper relates to improvements in inductors with magnetic path configurations.

（従来技術と問題点） この種の従来例として、特開昭５７− １９６６４２号（昭和５７年１１月９日出願）リニヤス
テッピングモータがある。(Prior Art and Problems) A conventional example of this type is a linear stepping motor disclosed in Japanese Patent Application Laid-Open No. 196642/1983 (filed on November 9, 1987).

第５図はこの従来例の斜視図、第６図はその可動子電磁
石を第５図のＹ−Ｙ’軸を中心にして、θ方向に１８０
６回転して裏返して観た時の永久磁石の着磁パターンと
誘導子歯の関係図である。FIG. 5 is a perspective view of this conventional example, and FIG. 6 shows the mover electromagnet 180 degrees in the θ direction centered on the Y-Y' axis in FIG.
It is a relationship diagram between the magnetization pattern of the permanent magnet and the inductor teeth when viewed after turning over six times.

可動子電磁石ユニット（１相分）２０は、継鉄２に電機
子巻線１を巻回し、空隙を介して固定子に対向する面（
ｌｉｆｔ路断面部）には薄板状の永久磁石４が貼設され
ている。The mover electromagnet unit (for one phase) 20 includes an armature winding 1 wound around a yoke 2, and a surface facing the stator (
A thin plate-like permanent magnet 4 is attached to the lift road cross section).

固定子レール３０は移動軸ｚ−ｚ’方向に直角に等ピッ
チに歯３１（溝は３２）を設けた積層鉄心である。もっ
とも低速で使用するものはソリッドの鉄心でも良い。The stator rail 30 is a laminated iron core in which teeth 31 (grooves are 32) are provided at equal pitches at right angles to the movement axis zz' direction. However, a solid iron core may be used for those used at the lowest speed.

可動子の永久磁石４は、固定子レール３０の誘導子歯３
１と平行に、第６図のように着磁され、その着磁パター
ンは、電機子巻線１に囲まれるＡ部と、囲まれない８部
の磁極の極性は逆になるように着磁しである。The permanent magnet 4 of the mover is connected to the inductor tooth 3 of the stator rail 30.
1 is magnetized as shown in Figure 6, and the magnetization pattern is such that the polarity of the magnetic poles of the part A surrounded by the armature winding 1 and the part 8 not surrounded by the armature winding 1 are opposite. It is.

これを電動機として動作させるには、電機子巻線１に電
流を流し、巻線１のつくる起磁力が、永久磁石４を非可
逆的に減磁させることのないような値以下にすればよい
。In order to operate this as an electric motor, current should be passed through the armature winding 1 and the magnetomotive force generated by the winding 1 should be below a value that does not irreversibly demagnetize the permanent magnet 4. .

ところが第５図、第６図に示した誘導子固定子３０は、
第７図（ａ）の状態から、溝３２を深くし歯３１の高さ
を高く第７図（ｂ）のように形成す゛ると、パーミアン
ス変調率が改善され、特性が向上するが、ヨーク厚さり
、は一定なので、固定子３０の厚さくｈｔ＋ｈ、）が厚
くなり不具合であった。However, the inductor stator 30 shown in FIGS. 5 and 6,
If the groove 32 is made deeper and the height of the tooth 31 is made higher as shown in FIG. 7(b) from the state shown in FIG. 7(a), the permeance modulation rate is improved and the characteristics are improved, but the yoke thickness Since the thickness of the stator 30 is constant, the thickness of the stator 30 (ht+h) becomes thicker, which is a problem.

〔発明の目的〕[Purpose of the invention]

ここにおいて本発明は、従、来例の難点を克服し、固定
子継鉄を南部の下ではなく、側端部に設けることによっ
て、歯の高さり、を高くし、固定子厚さを薄クシた梯子
形ｆｌ　ｎ子を提供づることを、その目的とする。Here, the present invention overcomes the drawbacks of the conventional prior art and provides the stator yoke at the side end rather than under the southern part, thereby increasing the height of the teeth and reducing the thickness of the stator. Its purpose is to provide a combed ladder-shaped fln.

〔発明の概要〕[Summary of the invention]

本発明は、上記目的を達成するために、可動子は固定子
に相対する磁路断面部に薄板状の永久磁石を貼設した電
磁石とし、固定子は誘導子歯と継鉄より成るリニア誘導
子形同期モータにおいて、固定子を梯子形に構成し、歯
部のみを可動子に対向させ、継鉄部はその側端部に可動
子の幅より小さいたとえば数分の１にして、移動方向に
沿って配設することを特徴とする梯子形誘導子である。In order to achieve the above object, the present invention uses an electromagnet in which the mover is an electromagnet with a thin plate-like permanent magnet attached to the cross section of the magnetic path facing the stator, and the stator is a linear induction consisting of inductor teeth and a yoke. In a child-type synchronous motor, the stator is configured in the form of a ladder, with only the teeth facing the mover, and the yoke part has a width smaller than the mover at its side end, for example, a fraction of the width of the mover, so that the stator is configured in a ladder shape. This is a ladder-shaped inductor characterized by being arranged along the .

〔実施例〕〔Example〕

本発明の一実施例における構成図を第１図に表わし、（
ａ）は斜視図、（ｂ）は（ａ）のＹ−Ｙ′線に沿う一部
の側断面図である。A configuration diagram of an embodiment of the present invention is shown in FIG.
(a) is a perspective view, and (b) is a partial side sectional view taken along the line YY' in (a).

すべての図面において同一符号は同一もしくは相当部分
を示す。The same reference numerals indicate the same or corresponding parts in all drawings.

この一実施例は、可動子２０の進行方向に梯子を形成す
るように、両側に継鉄３３　．３３ｂを配設するととも
に、それに直角に等ピッチに誘導子歯３１を多数個固着
してなる。In this embodiment, yokes 33 . 33b, and a large number of inductor teeth 31 are fixed at equal pitches at right angles thereto.

磁束は、電磁石１→永久磁石４（Ｎ極）→空隙→誘導子
歯３１→継鉄３３　．３３ｂ−＋誘導子歯部 ３１→空隙→永久磁石４（Ｓ極）→電磁石１と流れる。The magnetic flux is as follows: Electromagnet 1 → Permanent magnet 4 (N pole) → Air gap → Inductor tooth 31 → Yoke 33 . The flow is as follows: 33b-+inductor tooth portion 31→air gap→permanent magnet 4 (S pole)→electromagnet 1.

Ｙ−Ｙ’断面をみるとわかるように、誘導子歯３１は満
３２の深さが等極内に無限大となるから、パーミアンス
変調率が大きい。As can be seen from the Y-Y' cross section, the depth of the inductor tooth 31 is infinite within the equipolar range, so the permeance modulation rate is large.

両側端部に移動方向に沿って配設した継鉄３３　．３３
ｂの幅ｗ３３は、可動子２ｏの幅ｗ２゜のたとえば数分
の１にしである。Yokes 33 are arranged along the movement direction at both ends. 33
The width w33 of b is, for example, a fraction of the width w2° of the movable element 2o.

しかして、誘導子歯３１の中心部では歯の高さｈ３１を
側端部の歯の高さｈ３３より低くしても、磁束の飽和は
生じない。Therefore, even if the height h31 of the tooth at the center of the inductor tooth 31 is lower than the height h33 of the tooth at the side end, saturation of the magnetic flux does not occur.

第２図は、本発明の他の実施例の傾斜図である。FIG. 2 is a perspective view of another embodiment of the invention.

この他の実施例は継鉄を片側の端部にのみ片側継鉄３３
ａを配設した手段である。In this other embodiment, the yoke is installed only at one end of the yoke 33.
This means that a is arranged.

この片側継鉄で回転モータに応用した例を第３図に表わ
す。（ａ）は一部の正断面図、（ｂ＞は側断面図である
。Figure 3 shows an example in which this one-sided yoke is applied to a rotating motor. (a) is a partial front sectional view, and (b> is a side sectional view).

この応用例は、電磁石１と誘導子歯３１が回転部にあり
永久磁石４を固定部に設けたモータに比べて、 （誘導子歯３１の高さ）−（永久磁石４の厚さ）だけ電
磁石１のコイルを収納する溝の深さを太きくできる。In this application example, compared to a motor in which the electromagnet 1 and the inductor tooth 31 are provided in the rotating part and the permanent magnet 4 is provided in the fixed part, the difference is (height of the inductor tooth 31) - (thickness of the permanent magnet 4). The depth of the groove in which the coil of the electromagnet 1 is housed can be increased.

誘導子歯部３１のパーミアンスをＰｔ、溝部３２のパー
ミアンスをＰ　とすると、 パーミアンス変調率（Ｐｔ−Ｐ、）／Ｐｔが大ぎくなる
。When the permeance of the inductor tooth portion 31 is Pt and the permeance of the groove portion 32 is P, the permeance modulation rate (Pt-P, )/Pt becomes large.

永久磁石４の幅を電機子２０積厚より大きくして、出力
の増大がはかれる。The output can be increased by making the width of the permanent magnet 4 larger than the thickness of the armature 20.

この実施例はＦ　Ｄ　Ｄ　（Ｎｏｐｙ　ｄｉｓｋ　ｄｒ
ｉｖｅ）　スピンドル用ブラシレスＤＣモータに適用で
きる構造である。This example is FDD (Nopy disk dr
ive) This structure can be applied to brushless DC motors for spindles.

本発明の別の実施例における一部の斜視図を第４図に示
す。A perspective view of a portion of another embodiment of the invention is shown in FIG.

この別の実施例は両側端部の継鉄３３ａ。This other embodiment has yokes 33a at both ends.

３３、に加えて、その両者の中間部位に中間継鉄部３３
ｏをさらに組み込んで格子状にＭ　ｌ子を形成しており
、この中間継鉄３３ｃの誘導子歯３１の相互間は可動子
２０と対向する而を窪まぜである。In addition to
The inductor teeth 31 of this intermediate yoke 33c, which face the movable element 20, are dimpled between the inductor teeth 31 of the intermediate yoke 33c.

（発明の効果〕 かくして本発明によれば、 誘導子山間の溝が等極内に無限大になるので、パーミア
ンス変調率が大きくなり、トルクつまみ推力が増大する リニアモータとしての固定子および回転モータとしての
回転子の厚さが減少してモータがコンパクトになる 構造自由変人である 等の効果かえられ、当該分野に寄与するところ多い。(Effects of the Invention) Thus, according to the present invention, the groove between the inductor peaks becomes infinitely large within the equipolar range, so that the permeance modulation rate increases and the torque knob thrust increases. The rotor thickness is reduced and the motor is made more compact.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の斜視図、Ｙ−Ｙ’に沿う一
部側断面図、第２図は本発明の他の実施例の一部斜視図
、第３図はその回転モータに応用した正断面図、側断面
図、第４図は本発明の別の実施例の一部の斜視図、第５
図〜第７図は従来例の説明図である。 １・・・電磁石（電機子巻線） ２・・・可動子継鉄 ４・・・永久磁石 ２０・・・可動子 ３０・・・固定子 ３１・・・誘導子歯 ３２・・・溝 ３３　．３３　　３３Ｃ・・・固定子継鉄。 ａ　　　　ｂ・ 出願人代理人　　佐　　藤　　−雄 下 」＼ぐｍ−・コ （ｂ） 第１図 ２◆−一−Ｚ′ 第２図 第３図 第４図 第５図 第６図 （ひっ 第７図Fig. 1 is a perspective view of one embodiment of the present invention, a partial side sectional view along Y-Y', Fig. 2 is a partial perspective view of another embodiment of the invention, and Fig. 3 is a rotating motor thereof. FIG. 4 is a perspective view of a part of another embodiment of the present invention, and FIG.
7 to 7 are explanatory diagrams of conventional examples. 1... Electromagnet (armature winding) 2... Mover yoke 4... Permanent magnet 20... Mover 30... Stator 31... Inductor tooth 32... Groove 33 ．． 33 33C...Stator yoke. a b. Applicant's agent Yushi Sato\gm-co (b) Fig. 1 2◆-1-Z' Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Figure 7

Claims (1)

【特許請求の範囲】 １、可動子は固定子に相対する磁路断面部に薄板状の永
久磁石を貼設した電磁石とし、固定子は誘導子歯と継鉄
より成るリニア誘導子形同期モータにおいて、 固定子を梯子形に構成し、誘導子歯のみを可動子に対向
させ、継鉄部はその側端部に可動子の幅より小さくして
可動子移動方向に沿つて配設することを特徴とする梯子
形誘導子。 ２、継鉄部を誘導子歯の両側端部にそなえる特許請求の
範囲第１項記載の梯子形誘導子。 ３、継鉄部を誘導子歯の中間に設けた特許請求の範囲第
２項記載の梯子形誘導子。[Claims] 1. The mover is an electromagnet with a thin plate-like permanent magnet attached to the magnetic path cross section facing the stator, and the stator is a linear inductor type synchronous motor consisting of inductor teeth and a yoke. In the stator, the stator is configured in a ladder shape, only the inductor teeth are opposed to the mover, and the yoke portion is smaller than the width of the mover at its side end and is arranged along the moving direction of the mover. A ladder-shaped inductor featuring: 2. The ladder-shaped inductor according to claim 1, wherein the yoke portions are provided at both ends of the inductor teeth. 3. The ladder-shaped inductor according to claim 2, wherein the yoke portion is provided between the inductor teeth.