JP3582073B2 - Linear pulse motor - Google Patents

Linear pulse motor Download PDF

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Publication number
JP3582073B2
JP3582073B2 JP12957195A JP12957195A JP3582073B2 JP 3582073 B2 JP3582073 B2 JP 3582073B2 JP 12957195 A JP12957195 A JP 12957195A JP 12957195 A JP12957195 A JP 12957195A JP 3582073 B2 JP3582073 B2 JP 3582073B2
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Japan
Prior art keywords
pair
bias
magnetic pole
permanent magnet
pulse motor
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JP12957195A
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Japanese (ja)
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JPH08308207A (en
Inventor
義昭 久保田
健生 鈴木
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Description

【００１】
【産業上の利用分野】
本発明は、リニアパルスモータの電機子に関する。
【００２】
【従来の技術】
従来、磁気ヘッド駆動用のアクチュエータとして、扇形の断面をした磁性体コア外周面の円周方向に等角度ピッチで磁極歯をもつ磁極子と、磁極歯の外周面と、一定の空隙を保って、磁極子の磁極歯と等しい角度ピッチの磁極歯からなる複数の互いに位相の異なる磁極歯群を備えた固定子コアと、固定子コアの背面に設けたバイアス磁石と、固定子コアに巻装される巻線よりなる電機子を備えたものがある（例えば、特開昭６１−８５０５７号公報）。
【００３】
【発明が解決しようとする課題】
ところが、従来の技術では、バイアス磁石と巻線の作る磁束が、エッジ効果により端部の磁極歯と中央の磁極歯とでアンバランスになるため、停止時は可動子と固定子の磁極歯の相対位置により自己保持力が異なり、位置決め精度の低下のもととなるとともに、移動時は振動の原因となっていた。
そこで、本発明は、端部の磁極歯と中央の磁極歯で、磁束を均一化させるリニアパルスモータの電機子を提供することを目的とする。
【０００４】
【課題を解決するための手段】
上記問題を解決するために、請求項１の発明は、平板状のバックヨークと、このバックヨークに所定ピッチで設けた一対の矩形のバイアス磁石と、このバイアス磁石の下面に設けたＣ字形の脚部にコイルを巻回し、脚部の表面に移動方向と直交させて所定ピッチで磁極歯を設けた一対のコアよりなる電機子と、ベースヨークと、このベースヨークの表面に前記電機子の移動方向と直交させて所定ピッチで磁極歯を設けた磁極子を空隙を介し対向させたリニアパルスモータにおいて、前記コアの両端に面取りを設け、前記面取りのない部分に前記バイアス永久磁石１２を設けると共に、前記面取りのある部分に前記バイアス永久磁石の側面に密着させて梯形の補助バイアス永久磁石を設けたものである。
請求項２の発明は、円弧状に形成されたバックヨークと、前記バックヨークの両側に表面の直線部が円弧の中心に向かって浅く折り曲げように設けた張出部と、このバックヨークに形成してなる張出部に所定ピッチで設けた一対の矩形のバイアス磁石と、このバイアス磁石の下面に設けたＣ字形の脚部にコイルを巻回し、脚部の表面に移動方向と直交させて所定ピッチで磁極歯を設けた一対のコアよりなる電機子と、円弧状のベースヨークと、このベースヨークの表面に前記電機子の移動方向と直交させて所定ピッチで磁極歯を設けた磁極子を空隙を介し対向させたリニアパルスモータにおいて、前記コアの両端に面取りを設け、前記面取りのない部分に前記バイアス永久磁石１２を設けると共に、前記面取りのある部分に前記バイアス永久磁石の側面に密着させて梯形の補助バイアス永久磁石を設けたものである。
請求項３の発明は、請求項１または２に記載のリニアパルスモータにおいて、前記補助バイアス永久磁石一対を、前記バイアス永久磁石と同方向に着磁し、前記一対のコアの外側の両端に設けたものである。
請求項４の発明は、請求項１または２に記載のリニアパルスモータにおいて、前記補助バイアス永久磁石一対を、前記バイアス永久磁石と異方向に着磁し、前記一対のコアの内側の両端に設けたものである。
請求項５の発明は、請求項１または２に記載のリニアパルスモータにおいて、前記バイアス永久磁石と同方向に着磁した前記補助バイアス永久磁石一対を前記一対のコアの外側の両端に、前記バイアス永久磁石と異方向に着磁した前記補助バイアス永久磁石一対を前記一対のコアの内側の両端に設けたものである。
【００５】
【作用】
上記の構成により、補助バイアス永久磁石１６の作る磁束が、バイアス永久磁石１２およびコイル１７の作る磁束を強めたり弱めたりして、コア１４を流れる磁束を均一化する。
【００６】
【実施例】
以下、本発明の実施例を図１により説明する。
平板状のバックヨーク１１の下面には、上下方向に着磁した矩形のバイアス永久磁石１２、１２を、電機子１の移動方向に、隣合うもの同志の極性を異ならせて所定のピッチで設けてある。
バイアス永久磁石１２の下面には、両端に面取り１３、１３を設けたＣ字形の一対のコア１４、１４を設けてある。
コア１４のＣ字形の両脚には、コイル１７を巻き方向が逆になるように巻回し、直列に接続してある。
コア１４の両脚の表面には、電機子１の移動方向に直交させて、所定のピッチで複数の磁極歯１５を設けてある。
一対のコア１４、１４の両外側の面取り１３ｅ、１３ｅとバックヨーク１１の間には、バイアス永久磁石１２の端面に密着させて、バイアス永久磁石１２と同方向に着磁した梯形の補助バイアス永久磁石１６を設けてある。
バックヨーク１１、バイアス永久磁石１２、コア１４、コイル１７と補助バイアス永久磁石１６で電機子１を構成する。
ベースヨーク２２の表面には、電機子１の移動方向に直交させて、所定ピッチで磁極歯２１を設けてある。磁極歯２１の背面はベースヨーク２２で連絡してある。
磁極歯２１とベースヨーク２２で磁極子２を構成する。
電機子１の磁極歯１５と磁極子２の磁極歯２１を、空隙を介し対向させる。
なお、説明上は電機子１を移動側、磁極子２を固定側にしてあるが、逆にしてもよい。
【００７】
以下に、動作を説明する。
バイアス永久磁石１２の作る磁束φｂとコイルの作る磁束φｃは、図１に実線で示す磁路を流れる。補助バイアス永久磁石１６の作る磁束φａｄは、破線で示す磁路を流れる。従って、磁束は端部の磁極歯１５ｅ、１５ｅ部で磁束φａｄ分だけ強められる。その結果、エッジ効果が補償される。
なお、補助バイアス永久磁石１６の作る磁束φａｄの調整は、永久磁石の容積を変えたり、起磁力の大きさを変えること等によって行う。
【００８】
図２に第２の実施例を示す。
バイアス永久磁石１２と異なる方向に着磁した補助バイアス永久磁石１６を、一対のコア１４、１４の両内側の面取り１３ｉ、１３ｉ部に、対面させて設けてある。
この場合、バイアス永久磁石１２の作る磁束φｂおよびコイルの作る磁束φｃは、中央の磁極歯１５ｃ、１５ｃ部で、補助バイアス永久磁石１６の作る磁束φａｄにより弱められる。その結果、磁極歯１５を流れる磁束が均一化される。
【００９】
図３に第３の実施例を示す。
この実施例は、実施例と第２の実施例を合わせたもので、バイアス永久磁石１２と同じ方向に着磁した補助バイアス永久磁石１６をコア１４、１４の両外側の面取り１３ｅ、１３ｅに、バイアス永久磁石１２と異方向に着磁した補助バイアス永久磁石１６をコア１４の両内側の面取り１３ｉ、１３ｉに設けてある。
この場合、磁束は端部の磁極歯１５ｅ、１５ｅ部で強められ、中央の磁極歯１５ｃ、１５ｃ部で弱められる。
【０１０】
図４に第４の実施例を示す。
この実施例は、曲面リニアパルスモータの例である。
バックヨーク１１の両側には、表面の直線部が回転中心Ｏを向くように浅く折り曲げた張出部３１を設けてある。張出部３１の上面には、上下方向に着磁した矩形のバイアス永久磁石１２、１２を、電機子１の移動方向に、隣合うもの同志の極性を異ならせて所定のピッチで設けてある。
バイアス永久磁石１２、１２の上面には、両端に面取り１３、１３を設けたＣ字形のコア１４、１４一対を設けてある。
コア１４のＣ字形の両脚には、コイル１７を巻き方向が逆になるように巻回し、直列に接続してある。
コア１４のＣ字形の両脚の表面には、回転中心Ｏに向く円弧上に、複数の磁極歯３５を所定のピッチで設けてある。
一対のコア１４、１４の両外側の面取り１３ｅ、１３ｅと張出部３１の間には、バイアス永久磁石１２の端面に密着させて、梯形の補助バイアス永久磁石１６をバイアス永久磁石１２と同方向に着磁し設けてある。
バックヨーク３１、バイアス永久磁石１２、コア１４、コイル１７と補助バイアス永久磁石１６で電機子３を構成する。
ベースヨーク４２は回転中心Ｏを中心とする円弧状にしてあり、円弧上には複数の磁極歯４１を設けてある。ベースヨーク４２と磁極歯４１で磁極子４を構成する。
電機子３の磁極歯３５と磁極子４の磁極歯４１を空隙を介し対向させる。
動作は実施例と同じなので説明を省略する。
なお、補助バイアス永久磁石１６を第２の実施例および第３の実施例と同様に構成してもよい。
【０１１】
【発明の効果】
以上に述べたことから、本発明は下記の効果を有する。
コアを流れる磁束を均一化でき、エッジ効果が無くなるので、
（１）停止時は、自己保持力が可動子と固定子の磁極歯相対位置の影響を受けなくなり、停止精度を向上できる。
（２）移動時は推力リップルを低減できる。
【図面の簡単な説明】
【図１】本発明の実施例を示す側面図。
【図２】本発明の第２の実施例を示す側面図。
【図３】本発明の第３の実施例を示す側面図。
【図４】本発明の第４の実施例を示す側面図。
【符号の説明】
１、３ 電機子
１１ バックヨーク
１２ バイアス永久磁石
１３ 面取り
１４ コア
１５、２１、３５、４１ 磁極歯
１５ｅ、３５ｅ 端部の磁極歯
１５ｃ 中央の磁極歯
１６ 補助バイアス永久磁石
１７ コイル
２、４ 磁極子
２２、４２ ベースヨーク
３１ 張出部[0101]
[Industrial applications]
The present invention relates to an armature for a linear pulse motor.
[0092]
[Prior art]
Conventionally, as an actuator for driving a magnetic head, a constant gap is maintained between a magnetic pole having magnetic pole teeth at equal angular pitches in a circumferential direction of a magnetic core outer circumferential surface having a sector-shaped cross section, and a magnetic pole tooth outer circumferential surface. A stator core having a plurality of magnetic pole teeth of different phases, each having a magnetic pole tooth having the same angular pitch as the magnetic pole teeth of the magnetic pole, a bias magnet provided on the back surface of the stator core, and winding on the stator core. Some are provided with an armature composed of a wound winding (for example, Japanese Patent Application Laid-Open No. 61-85057).
[0093]
[Problems to be solved by the invention]
However, in the conventional technology, the magnetic flux generated by the bias magnet and the winding is unbalanced between the end magnetic pole teeth and the central magnetic pole teeth due to the edge effect. The self-holding force differs depending on the relative position, causing a decrease in positioning accuracy and causing vibration during movement.
Accordingly, it is an object of the present invention to provide an armature of a linear pulse motor in which magnetic flux is made uniform by end magnetic pole teeth and central magnetic pole teeth.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the invention of claim 1, and the back yoke flat plate-shaped, and a pair of rectangular bias magnet provided at a predetermined pitch in the back yoke, C-shaped provided on the lower surface of the bias magnet An armature composed of a pair of cores having a pair of cores provided with magnetic pole teeth at a predetermined pitch perpendicular to the moving direction on the surface of the leg, a base yoke, and the armature on the surface of the base yoke. In a linear pulse motor in which magnetic pole teeth provided with magnetic pole teeth at a predetermined pitch perpendicular to the direction of movement are opposed to each other via an air gap, chamfers are provided at both ends of the core, and the bias permanent magnet 12 is provided at a portion without the chamfer. provided with one in which the in close contact to the side surface of the biasing permanent magnet part component with the chamfered provided an auxiliary biasing permanent magnet of trapezoidal.
The invention according to claim 2 is characterized in that the back yoke is formed in an arc shape, an overhang portion provided on both sides of the back yoke so that a straight portion on the surface is bent shallowly toward the center of the arc, and the back yoke is formed on the back yoke. A coil is wound around a pair of rectangular bias magnets provided at a predetermined pitch on the overhang portion formed as described above, and a C-shaped leg provided on the lower surface of the bias magnet, and is orthogonal to the moving direction on the surface of the leg. An armature comprising a pair of cores provided with magnetic pole teeth at a predetermined pitch, an arc-shaped base yoke, and a magnetic pole provided with magnetic pole teeth at a predetermined pitch on the surface of the base yoke at right angles to the moving direction of the armature. In the linear pulse motor in which the cores are opposed to each other with a gap therebetween, chamfers are provided at both ends of the core, the bias permanent magnets 12 are provided at portions without the chamfers, and the bias permanent magnets are provided at In close contact to the side of the stone it is provided with a supplemental biasing permanent magnet of trapezoidal.
According to a third aspect of the present invention, in the linear pulse motor according to the first or second aspect, the pair of auxiliary bias permanent magnets are magnetized in the same direction as the bias permanent magnets, and are provided at both outer ends of the pair of cores. It is a thing.
According to a fourth aspect of the present invention, in the linear pulse motor according to the first or second aspect, the pair of auxiliary bias permanent magnets is magnetized in a different direction from the bias permanent magnets, and is provided at both inner ends of the pair of cores. It is a thing.
According to a fifth aspect of the present invention, in the linear pulse motor according to the first or second aspect, the pair of auxiliary bias permanent magnets magnetized in the same direction as the bias permanent magnets is provided at both ends on the outside of the pair of cores. A pair of the auxiliary bias permanent magnets magnetized in a different direction from the permanent magnets are provided at both inner ends of the pair of cores.
[0056]
[Action]
With the above configuration, the magnetic flux generated by the auxiliary bias permanent magnet 16 increases or decreases the magnetic flux generated by the bias permanent magnet 12 and the coil 17, and makes the magnetic flux flowing through the core 14 uniform.
[0086]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
On the lower surface of a flat back yoke 11, rectangular bias permanent magnets 12, 12 magnetized in the vertical direction are provided at a predetermined pitch in the moving direction of the armature 1 with different polarities between adjacent magnets. It is.
On the lower surface of the bias permanent magnet 12, a pair of C-shaped cores 14, 14 provided with chamfers 13, 13 at both ends are provided.
A coil 17 is wound around both C-shaped legs of the core 14 so that the winding direction is reversed, and connected in series.
A plurality of magnetic pole teeth 15 are provided on the surfaces of both legs of the core 14 at a predetermined pitch in a direction perpendicular to the moving direction of the armature 1.
Between the chamfers 13 e, 13 e on both outer sides of the pair of cores 14, 14 and the back yoke 11, a trapezoidal auxiliary bias permanent magnet that is magnetized in the same direction as the bias permanent magnet 12 is brought into close contact with the end face of the bias permanent magnet 12. A magnet 16 is provided.
The armature 1 is composed of the back yoke 11, the bias permanent magnet 12, the core 14, the coil 17, and the auxiliary bias permanent magnet 16.
Magnetic pole teeth 21 are provided on the surface of the base yoke 22 at a predetermined pitch in a direction perpendicular to the moving direction of the armature 1. The back surface of the magnetic pole teeth 21 is connected by a base yoke 22.
The magnetic pole teeth 2 and the base yoke 22 constitute the magnetic pole 2.
The magnetic pole teeth 15 of the armature 1 and the magnetic pole teeth 21 of the magnetic pole element 2 are opposed to each other via a gap.
In the description, the armature 1 is on the moving side and the magnetic pole 2 is on the fixed side, but may be reversed.
007
The operation will be described below.
The magnetic flux φb generated by the bias permanent magnet 12 and the magnetic flux φc generated by the coil flow through a magnetic path indicated by a solid line in FIG. The magnetic flux φad generated by the auxiliary bias permanent magnet 16 flows through a magnetic path indicated by a broken line. Therefore, the magnetic flux is strengthened by the magnetic flux φad at the magnetic pole teeth 15e at the end portions. As a result, edge effects are compensated.
The adjustment of the magnetic flux φad produced by the auxiliary bias permanent magnet 16 is performed by changing the volume of the permanent magnet, changing the magnitude of the magnetomotive force, or the like.
[0098]
FIG. 2 shows a second embodiment.
An auxiliary bias permanent magnet 16 magnetized in a direction different from that of the bias permanent magnet 12 is provided to face the chamfers 13i, 13i on both inner sides of the pair of cores 14, 14.
In this case, the magnetic flux φb generated by the bias permanent magnet 12 and the magnetic flux φc generated by the coil are weakened by the magnetic flux φad generated by the auxiliary bias permanent magnet 16 at the central magnetic pole teeth 15c, 15c. As a result, the magnetic flux flowing through the magnetic pole teeth 15 is made uniform.
[0099]
FIG. 3 shows a third embodiment.
This embodiment is a combination of the embodiment and the second embodiment. An auxiliary bias permanent magnet 16 magnetized in the same direction as the bias permanent magnet 12 is provided on both outer chamfers 13e, 13e of the cores 14, 14. Auxiliary bias permanent magnets 16 magnetized in a different direction from the bias permanent magnets 12 are provided on chamfers 13i, 13i on both inner sides of the core 14.
In this case, the magnetic flux is strengthened at the end magnetic pole teeth 15e and 15e, and weakened at the center magnetic pole teeth 15c and 15c.
[0102]
FIG. 4 shows a fourth embodiment.
This embodiment is an example of a curved linear pulse motor.
On both sides of the back yoke 11, overhang portions 31 are provided which are bent shallowly so that the straight portions on the surface face the rotation center O. On the upper surface of the overhang portion 31, rectangular bias permanent magnets 12, 12 magnetized in the vertical direction are provided at a predetermined pitch in the moving direction of the armature 1 so that adjacent ones have different polarities. .
On the upper surfaces of the bias permanent magnets 12, 12, a pair of C-shaped cores 14, 14 having chamfers 13, 13 at both ends are provided.
A coil 17 is wound around both C-shaped legs of the core 14 so that the winding direction is reversed, and connected in series.
A plurality of magnetic pole teeth 35 are provided on the surface of both C-shaped legs of the core 14 at a predetermined pitch on an arc directed to the rotation center O.
Between the chamfers 13 e, 13 e on both outer sides of the pair of cores 14, 14 and the overhanging portion 31, the trapezoidal auxiliary bias permanent magnet 16 is brought into close contact with the end face of the bias permanent magnet 12 in the same direction as the bias permanent magnet 12. It is magnetized and provided.
The armature 3 is constituted by the back yoke 31, the bias permanent magnet 12, the core 14, the coil 17, and the auxiliary bias permanent magnet 16.
The base yoke 42 has an arc shape centered on the rotation center O, and a plurality of magnetic pole teeth 41 are provided on the arc. The magnetic pole 4 is constituted by the base yoke 42 and the magnetic pole teeth 41.
The magnetic pole teeth 35 of the armature 3 and the magnetic pole teeth 41 of the magnetic pole element 4 are opposed to each other via a gap.
The operation is the same as in the embodiment, and the description is omitted.
Note that the auxiliary bias permanent magnet 16 may be configured in the same manner as in the second and third embodiments.
[0111]
【The invention's effect】
As described above, the present invention has the following effects.
Since the magnetic flux flowing through the core can be uniformed and the edge effect is eliminated,
(1) At the time of stopping, the self-holding force is not affected by the relative positions of the magnetic pole teeth of the mover and the stator, and the stopping accuracy can be improved.
(2) The thrust ripple can be reduced during movement.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a side view showing a second embodiment of the present invention.
FIG. 3 is a side view showing a third embodiment of the present invention.
FIG. 4 is a side view showing a fourth embodiment of the present invention.
[Explanation of symbols]
1, 3 Armature 11 Back yoke 12 Bias permanent magnet 13 Chamfer 14 Cores 15, 21, 35, 41 Magnetic pole teeth 15e, 35e End magnetic pole teeth 15c Center magnetic pole tooth 16 Auxiliary bias permanent magnet 17 Coil 2, 4 Magnetic pole 22, 42 Base yoke 31 Overhang

Claims (5)

平板状のバックヨークと、このバックヨークに所定ピッチで設けた一対の矩形のバイアス磁石と、このバイアス磁石の下面に設けたＣ字形の脚部にコイルを巻回し、脚部の表面に移動方向と直交させて所定ピッチで磁極歯を設けた一対のコアよりなる電機子と、ベースヨークと、このベースヨークの表面に前記電機子の移動方向と直交させて所定ピッチで磁極歯を設けた磁極子を空隙を介し対向させたリニアパルスモータにおいて、
前記コアの両端に面取りを設け、前記面取りのない部分に前記バイアス永久磁石１２を設けると共に、前記面取りのある部分に前記バイアス永久磁石の側面に密着させて梯形の補助バイアス永久磁石を設けたことを特徴とするリニアパルスモータ。 Flat and plate-shaped back yoke, a pair of rectangular bias magnet provided at a predetermined pitch in the back yoke, a coil wound around the legs of the C-shaped provided on the lower surface of the bias magnet, moves on the surface of the leg portion An armature consisting of a pair of cores provided with magnetic pole teeth at a predetermined pitch orthogonal to the direction, a base yoke, and magnetic pole teeth provided at a predetermined pitch on the surface of the base yoke at a right angle to the moving direction of the armature. In a linear pulse motor with magnetic poles facing each other via an air gap,
A chamfer provided at both ends of said core, said bias permanent magnet 12 is provided on the portion without the chamfer was provided an auxiliary biasing permanent magnet of trapezoidal with the in close contact with the side surface of the biasing permanent magnet part component with the chamfered A linear pulse motor characterized in that: 円弧状に形成されたバックヨークと、前記バックヨークの両側に表面の直線部が円弧の中心に向かって浅く折り曲げように設けた張出部と、このバックヨークに形成してなる張出部に所定ピッチで設けた一対の矩形のバイアス磁石と、このバイアス磁石の下面に設けたＣ字形の脚部にコイルを巻回し、脚部の表面に移動方向と直交させて所定ピッチで磁極歯を設けた一対のコアよりなる電機子と、円弧状のベースヨークと、このベースヨークの表面に前記電機子の移動方向と直交させて所定ピッチで磁極歯を設けた磁極子を空隙を介し対向させたリニアパルスモータにおいて、
前記コアの両端に面取りを設け、前記面取りのない部分に前記バイアス永久磁石１２を設けると共に、前記面取りのある部分に前記バイアス永久磁石の側面に密着させて梯形の補助バイアス永久磁石を設けたことを特徴とするリニアパルスモータ。 A back yoke formed in a circular arc shape, the back yoke and the swollen portion linear portion of the surface on both sides is provided as folding shallow I suited to the center of the arc of the overhang formed by forming on the back yoke A pair of rectangular bias magnets provided at a predetermined pitch on the portion, and a coil wound around a C-shaped leg provided on the lower surface of the bias magnet, and magnetic pole teeth at a predetermined pitch perpendicular to the moving direction on the surface of the leg. An armature composed of a pair of cores provided with a base, an arc-shaped base yoke, and a magnetic pole provided with magnetic pole teeth on a surface of the base yoke at a predetermined pitch perpendicular to the moving direction of the armature are opposed to each other via a gap. In the linear pulse motor
A chamfer is provided at both ends of the core, the bias permanent magnet 12 is provided at a portion without the chamfer, and a trapezoidal auxiliary bias permanent magnet is provided at the chamfered portion by closely contacting the side surface of the bias permanent magnet. A linear pulse motor. 前記補助バイアス永久磁石一対を、前記バイアス永久磁石と同方向に着磁し、前記一対のコアの外側の両端に設けた請求項１または２に記載のリニアパルスモータ。3. The linear pulse motor according to claim 1, wherein the pair of auxiliary bias permanent magnets are magnetized in the same direction as the bias permanent magnets, and are provided at both outer ends of the pair of cores. 4. 前記補助バイアス永久磁石一対を、前記バイアス永久磁石と異方向に着磁し、前記一対のコアの内側の両端に設けた請求項１または２に記載のリニアパルスモータ。The linear pulse motor according to claim 1, wherein the pair of auxiliary bias permanent magnets is magnetized in a different direction from the bias permanent magnet, and is provided at both ends inside the pair of cores. 前記バイアス永久磁石と同方向に着磁した前記補助バイアス永久磁石一対を前記一対のコアの外側の両端に、前記バイアス永久磁石と異方向に着磁した前記補助バイアス永久磁石一対を前記一対のコアの内側の両端に設けた請求項１または２に記載のリニアパルスモータ。The pair of auxiliary bias permanent magnets magnetized in the same direction as the bias permanent magnets are provided at both outer ends of the pair of cores, and the pair of auxiliary bias permanent magnets magnetized in the opposite direction to the bias permanent magnets are provided in the pair of cores. The linear pulse motor according to claim 1, wherein the linear pulse motor is provided at both ends inside.
JP12957195A 1995-04-27 1995-04-27 Linear pulse motor Expired - Fee Related JP3582073B2 (en)

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