JPH0583924A - Linear motor - Google Patents

Linear motor

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Publication number
JPH0583924A
JPH0583924A JP24103491A JP24103491A JPH0583924A JP H0583924 A JPH0583924 A JP H0583924A JP 24103491 A JP24103491 A JP 24103491A JP 24103491 A JP24103491 A JP 24103491A JP H0583924 A JPH0583924 A JP H0583924A
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JP
Grant status
Application
Patent type
Prior art keywords
permanent
magnet
magnetic
needle
foreign
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
Application number
JP24103491A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Takushima
義之 宅島
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Abstract

PURPOSE:To prevent the attraction of magnetic substance powder and magnetic metallic foreign matters by forming an air gap between a permanent magnet and a stator at both ends in the direction of movement of a needle so as to be made larger than that between the needle and the stator. CONSTITUTION:A needle 1 and a stator 2 are supported rectilinearly movably in the directions of the arrows D, E by a linear way 10, the needle 1 is composed of a sliding table 3, a yoke 4 and a permanent magnet 5, and permanent magnets are arranged at both ends in the direction of movement of the yoke 4. Structure in which the air gap I between the permanent magnet 5 and a core 6 is reduced as much as possible and motor efficiency is improved is formed, and the permanent magnet 9 attracts dust from surrounding environment. When the needle 1 is moved, magnetic metallic foreign matters in motor surrounding environment are attracted to the permanent magnet 9 having a large air gap with the core 6 of the stator 2, thus preventing the attraction of the magnetic metallic foreign matters to the permanent magnet 5. Accordingly, the damage of the permanent magnet 5 or the core 6 and a coil 7 due to magnetic metallic foreign matters in the fine air gap I section can be prevented.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は電磁力により推力を発生するリニアモータに関するものである。 The present invention relates to relates to a linear motor for generating a thrust by an electromagnetic force.

【0002】 [0002]

【従来の技術】可動子に永久磁石を、鉄心にコイルを巻回した電機子を固定子にもつ構造の従来のリニアモータの断面図を図5に示す。 The permanent magnets of the Prior Art mover, a cross-sectional view of a conventional linear motor structure having an armature wound with a coil core in the stator shown in FIG.

【0003】図5において2は固定子、1は固定子2に矢印A、B方向へ移動可能に支持されている可動子で、 [0003] 2 in FIG. 5 is a stator, 1 is a movable element which is movably supported on the stator 2 arrow A, the direction B,
可動子1はスライドテーブル3、ヨーク4、永久磁石5 Mover 1 is the slide table 3, the yoke 4, a permanent magnet 5
により構成されており、固定子2は鉄心6、コイル7、 Is constituted by the stator 2 core 6, the coil 7,
固定子ベース8により構成されている。 It is constituted by a stator base 8. 11はスライドテーブル3の移動方向両端に設けられた永久磁石5、鉄心6、コイル7を覆うジャバラである。 11 permanent magnets 5 disposed in the moving direction end of the slide table 3, the iron core 6, a bellows covering the coil 7.

【0004】以上のように構成されたリニアモータについて以下動作を説明する。 [0004] describing the operation below the linear motor configured as described above. 可動子1を構成する永久磁石5には固定子2を構成する鉄心6とこの鉄心6に巻回されたコイル7との電磁力により推力が発生し、可動子1 Thrust is generated by the electromagnetic force of the coil 7 is wound the core 6 wound with the core 6 forming the stator 2 to the permanent magnet 5 forming the movable element 1, the mover 1
が固定子2の上を移動する。 There moves over the stator 2.

【0005】この従来構造のリニアモータでは、モータの製造工程やモータが使用される環境での塵埃としての磁性体粉や、異物としての磁性金属を可動子1の永久磁石5が吸着し、この磁性体粉や磁性金属が可動子1と固定子2との間の微小空隙 I部で可動子1の永久磁石5 [0005] In the linear motor of this prior art structure, and magnetic powder as dust in the environment of manufacturing processes and the motor of the motor is used, the magnetic metal as foreign matter permanent magnet 5 of the mover 1 adsorbed, this permanent magnets with microvoids I portion of the movable element 1 between the magnetic powder and the magnetic metal is the mover 1 and the stator 2 5
や、固定子2の鉄心6あるいはコイル7に衝突して、永久磁石5や鉄心6、あるいはコイル7を破損する場合があった。 And, it collides with the core 6 or the coil 7 of the stator 2, there can damage the permanent magnet 5 and the core 6 or the coil 7,.

【0006】この破損防止の為、従来は、永久磁石5 [0006] because of this corruption prevention, conventional, permanent magnet 5
と、鉄心6、コイル7を覆うジャバラ11を取付けたり、モータ使用環境を制限したり、あるいはモータ効率を低下させてでも空隙 Iを大きくしたりしていた。 When iron core 6, or attach the bellows 11 covering the coil 7, or limit motor use environment, or has been or increasing the gap I even lowering the motor efficiency.

【0007】なお、図5は一例であり、可動子側に永久磁石ではなく、鉄心あるいは鉄心コイルを有する構造のリニアモータでも、同様な問題が発生する。 [0007] FIG. 5 is an example, rather than a permanent magnet to the movable member side, even in the linear motor structure having an iron core or iron core coils, similar problems may occur.

【0008】 [0008]

【発明が解決しようとする課題】すなわち、上記従来の構成では、微小な空隙を介して電磁力により推力を発生するリニアモータでは、上記空隙に発生する磁束により、磁性体粉や磁性金属異物が空隙に吸着され、リニアモータが破損するという問題点を有しており、この為従来は、モータにジャバラを取付けたり、モータ使用環境を制限したり、空隙Iを大きくする方法がとられていたが、モータの効率が低下するという新たな問題点を有していた。 [SUMMARY OF THE INVENTION That is, in the conventional configuration, the linear motor for generating thrust by the electromagnetic force through the minute gap, the magnetic flux generated in the gap, the magnetic powder or a magnetic metal foreign object is adsorbed in the voids, has a problem that the linear motor is damaged, Therefore conventionally, or attach the bellows to the motor, or to restrict the motor use environment, a method of increasing the gap I had taken but the efficiency of the motor had a new problem of a decrease.

【0009】本発明は上記以外の簡便な方法で、磁性体粉や、磁性金属異物の空隙への吸着を防止するのが目的である。 [0009] The present invention is a simple method other than the above, and magnetic powder, it is desired to prevent adsorption of the gap of the magnetic metal foreign substance.

【0010】 [0010]

【課題を解決するための手段】本発明は上記問題点を解決するため、可動子の移動方向の両端に永久磁石をこの永久磁石と固定子との空隙が、可動子と固定子との空隙より大きくなるよう設けた。 Since the present invention SUMMARY OF] is to solve the above problems, voids at both ends of the moving direction of the mover permanent magnets and the permanent magnet gap between the stator, the mover and the stator provided so as to be larger.

【0011】 [0011]

【作用】可動子が固定子上を直線的に往復運動する場合、周囲環境の塵埃としての磁性体粉や、磁性金属異物を、可動子両端の永久磁石が吸着し、可動子と固定子間の空隙に磁性粉体や磁性金属異物が入るのを防ぎ、モータの破損を防止することができる。 [Action] When the mover is linearly reciprocated on the stator, and magnetic powder as dust in the ambient environment, the magnetic metal foreign object, the movable element at both ends of the permanent magnet is attracted, between the mover and the stator the gap prevents from entering the magnetic powder or a magnetic metallic foreign matter, it is possible to prevent damage to the motor.

【0012】 [0012]

【実施例】図1に本発明の一実施例におけるリニアモータの断面図、図2は本発明の一実施例におけるリニアモータの図1を線C−Cで切断した状態の断面図である。 EXAMPLES sectional view of a linear motor in an embodiment of the present invention in FIG. 1, FIG. 2 is a cross-sectional view of a state in which the cutting to Figure 1 of the linear motor by a line C-C in an embodiment of the present invention.
図1、図2において、可動子1と固定子2は、リニアウェイ(空気軸受、磁気軸受)10によって、矢印D、E 1 and 2, the mover 1 and the stator 2 are linear way (air bearings, magnetic bearings) by 10, the arrows D, E
方向に直線移動可能に支持されている。 It is linearly movable in the direction.

【0013】可動子1はスライドテーブル3、ヨーク4、永久磁石5より構成され、ヨーク4の移動方向両端に永久磁石9が設置されている。 [0013] mover 1 is the slide table 3, yoke 4, is composed of the permanent magnet 5, the permanent magnet 9 is disposed in the moving direction ends of the yoke 4.

【0014】ここで、永久磁石5は、固定子2の鉄心6 [0014] Here, the permanent magnet 5, the iron core 6 of the stator 2
とこれに巻回したコイル7との電磁力により推力を発生する為の主永久磁石で、鉄心6との空隙 Iは可能なかぎり小さくして、モータ効率を上げる構造となっている。 And the main permanent magnet for generating a thrust by the electromagnetic force of the coil 7 wound to, as small as the gap I possible with the iron core 6 has a structure to increase the motor efficiency.

【0015】また、永久磁石9は、周囲環境からの塵埃としての磁性体粉や、磁性金属異物を吸着するためのもので、この永久磁石9と固定子2との空隙χが永久磁石5と固定子2との空隙 Iより大きくなるよう配設されている。 Further, the permanent magnet 9, and magnetic powder as dust from the environment, for the purpose of adsorbing the magnetic metallic foreign matter, voids χ between the permanent magnet 9 and the stator 2 and the permanent magnet 5 It is arranged to be greater than the gap I between the stator 2. この永久磁石9の配設形状の第1の実施例を図3 Figure 3 a first embodiment arrangement 設形 like of the permanent magnet 9
(a)に、第2の実施例を図3(b)に、第3の実施例を図3(c)に、また、永久磁石9の厚みを薄くし空隙χを大きくする第4の実施例を図4(a)、(b)に示す。 (A), the second embodiment in FIG. 3 (b), a third embodiment in FIG. 3 (c), also a fourth embodiment of increasing the reduced thickness of the permanent magnet 9 voids χ Figure 4 is an example (a), shown in (b).

【0016】なお、本実施例では、可動子1に永久磁石5を用いたが、鉄心のみ、あるいは鉄心にコイルを巻回したものを可動子とした構造の場合でも同様な吸着用永久磁石を有する構成とすることが可能である。 [0016] In the present embodiment uses a permanent magnet 5 to the movable element 1, the core only, or a similar permanent magnet for adsorption even in the case of the structure as the mover and by winding a coil core It may be configured to have.

【0017】上記構成において可動子1を移動させると、固定子2の鉄心7との空隙を大きくとった永久磁石9に、モータ周囲環境中の磁性金属異物が吸着し、永久磁石5への磁性金属異物の吸着が防止でき、微小空隙 I [0017] moving the mover 1 in the above structure, the permanent magnet 9 which took a large gap between the core 7 of the stator 2, the magnetic metal foreign substances motor surrounding environment is adsorbed, the magnetism of the permanent magnet 5 adsorption of the metal foreign object can be prevented, microvoids I
部での磁性金属異物による永久磁石5あるいは、鉄心6、コイル7の破損を防止することができる。 Permanent magnet 5 or by magnetic metallic foreign matter in parts, it is possible to prevent the iron core 6, damage to the coil 7.

【0018】 [0018]

【発明の効果】以上のように本発明は、可動子の移動方向の両端に永久磁石をこの永久磁石と固定子との空隙が、可動子と固定子との空隙より大きくなるよう設けたことにより、可動子が固定子上を直線的に往復運動する場合、周囲環境の塵埃としての磁性体粉や、磁性金属異物を、可動子両端の永久磁石が吸着し、可動子と固定子間の空隙に磁性粉体や磁性金属異物が入るのを防ぎ、モータの破損を防止することができる。 The present invention as described above, according to the present invention is that the voids of the permanent magnet at both ends in the moving direction of the mover and the permanent magnet and the stator, provided to be larger than the gap between the mover and the stator Accordingly, when the mover reciprocates linearly on the stator, and magnetic powder as dust in the ambient environment, the magnetic metal foreign object, the movable element at both ends of the permanent magnet is attracted, between the mover and the stator gap prevents from entering the magnetic powder or a magnetic metallic foreign matter, it is possible to prevent damage to the motor.

【0019】この方式により、リニアモータの効率を低下させることなく、悪環境下でのモータの使用を可能とし、また、ジャバラの取付が不要となるとともに、可動子の移動方向両端に設けられた永久磁石はモータの磁束量を増し、モータ性能を向上させることができる。 [0019] By this method, without reducing the efficiency of the linear motor, allows the use of the motor in a bad environment, also with the mounting of the bellows is not required, provided the moving direction end of the mover permanent magnet increases the magnetic flux amount of the motor, it is possible to improve the motor performance.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例におけるリニアモータの断面図 Sectional view of a linear motor according to an embodiment of the present invention; FIG

【図2】本発明の一実施例におけるリニアモータの図1 FIG linear motor according to an embodiment of the present invention; FIG 1
を線C−Cで切断した状態の断面図 Cross-sectional view of a state where a taken along the line C-C

【図3】(a)は本発明の第1の実施例におけるリニアモータの永久磁石の配設形状図 (b)は本発明の第2の実施例におけるリニアモータの永久磁石の配設形状図 (c)は本発明の第3の実施例におけるリニアモータの永久磁石の配設形状図 3 (a) is distribution 設形 like view of a permanent magnet of a linear motor according to a second embodiment of the arrangement 設形 like view of a permanent magnet linear motor (b) the present invention in a first embodiment of the present invention (c) the distribution 設形 like view of a permanent magnet of a linear motor according to a third embodiment of the present invention

【図4】(a)は本発明の第4の実施例におけるリニアモータの可動子の断面図 (b)は本発明の第4の実施例におけるリニアモータの永久磁石の配設形状図 4 (a) is a fourth cross-sectional view of the linear motor movable element in the embodiment (b) are distribution 設形 like view of a permanent magnet of a linear motor according to a fourth embodiment of the present invention of the present invention

【図5】従来のリニアモータの断面図 FIG. 5 is a cross-sectional view of a conventional linear motor

【符号の説明】 DESCRIPTION OF SYMBOLS

1 可動子 2 固定子 3 スライダテーブル 4 ヨーク 5 主永久磁石 6 鉄心 7 コイル 8 固定子ベース 9 吸着用永久磁石 10 リニアウェイ(あるいは空気軸受、磁気軸受) 11 ジャバラ 1 mover 2 stator 3 slider table 4 yoke 5 main permanent magnet 6 core 7 coil 8 stator base 9 attracting permanent magnet 10 linear way (or air bearings, magnetic bearings) 11 Bellows

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】電磁力により推力を発生する固定子と可動子とを有するリニアモータであって、前記可動子の移動方向の両端に、前記固定子と可動子との間の空隙より大きな空隙をもつよう永久磁石を配置したことを特徴とするリニアモータ。 1. A linear motor having a stator and a mover which generates a thrust by the electromagnetic force, the two ends of the moving direction of the mover, large voids than the gap between the stator and the mover linear motor, characterized in that a permanent magnet to have a.
JP24103491A 1991-09-20 1991-09-20 Linear motor Pending JPH0583924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24103491A JPH0583924A (en) 1991-09-20 1991-09-20 Linear motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24103491A JPH0583924A (en) 1991-09-20 1991-09-20 Linear motor

Publications (1)

Publication Number Publication Date
JPH0583924A true true JPH0583924A (en) 1993-04-02

Family

ID=17068343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24103491A Pending JPH0583924A (en) 1991-09-20 1991-09-20 Linear motor

Country Status (1)

Country Link
JP (1) JPH0583924A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6919660B2 (en) * 2001-04-09 2005-07-19 Bel Technologies, Inc. Linear brushless DC motor with ironcore composite armature assembly
US7362012B2 (en) 2001-04-09 2008-04-22 Bei Sensors And Systems Company, Inc. Ironcore linear brushless DC motor with reduced detent force
JP2009060730A (en) * 2007-08-31 2009-03-19 Hitachi Ltd Linear motor
JP2014217090A (en) * 2013-04-22 2014-11-17 日立金属株式会社 Linear motor
US20150143858A1 (en) * 2013-11-25 2015-05-28 Ashikawa Co., Ltd Obd connector protective cover

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6919660B2 (en) * 2001-04-09 2005-07-19 Bel Technologies, Inc. Linear brushless DC motor with ironcore composite armature assembly
US7362012B2 (en) 2001-04-09 2008-04-22 Bei Sensors And Systems Company, Inc. Ironcore linear brushless DC motor with reduced detent force
JP2009060730A (en) * 2007-08-31 2009-03-19 Hitachi Ltd Linear motor
JP2014217090A (en) * 2013-04-22 2014-11-17 日立金属株式会社 Linear motor
US20150143858A1 (en) * 2013-11-25 2015-05-28 Ashikawa Co., Ltd Obd connector protective cover

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