JP5555858B2 - Finite angle motor - Google Patents

Finite angle motor Download PDF

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JP5555858B2
JP5555858B2 JP2008175911A JP2008175911A JP5555858B2 JP 5555858 B2 JP5555858 B2 JP 5555858B2 JP 2008175911 A JP2008175911 A JP 2008175911A JP 2008175911 A JP2008175911 A JP 2008175911A JP 5555858 B2 JP5555858 B2 JP 5555858B2
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stator
magnetic pole
finite angle
angle motor
tip
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JP2010017017A (en
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邦彦 飯島
康浩 片岡
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Tamagawa Seiki Co Ltd
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Description

本発明は、有限角モータに関し、特に、パーマロイにより固定子を構成することで、固定子の保磁力を小さくでき、可動子が往復運動する際の駆動トルクのバラツキを低減できるようにするための新規な改良に関するものである。   The present invention relates to a finite angle motor, and in particular, by configuring a stator by permalloy, the coercive force of the stator can be reduced, and variation in driving torque when the mover reciprocates can be reduced. It relates to new improvements.

従来用いられていたこの種の有限角モータとしては、例えば特許文献１等に示されている有限角モータが用いられている。このような有限角モータでは、固定子に設けられたコイルと、可動子に設けられた永久磁石との間で発生する反発力により、前記可動子が駆動軸を中心に所定の有限角で駆動される。すなわち、有限角モータでは、コイルに流れる電流の向きが順方向と逆方向とで交互に切り換えられることで、前記可動子が往復運動される。   As this type of finite-angle motor conventionally used, for example, a finite-angle motor shown in Patent Document 1 or the like is used. In such a finite angle motor, the mover is driven at a predetermined finite angle around the drive shaft by a repulsive force generated between a coil provided on the stator and a permanent magnet provided on the mover. Is done. That is, in the finite angle motor, the mover is reciprocated by alternately switching the direction of the current flowing in the coil between the forward direction and the reverse direction.

特開２００２−３３５６６３号公報JP 2002-335663 A

ここで、前記固定子は磁性体により構成されるので、前記固定子の磁気特性にはヒステリシスループが存在する。一般的に、上記のような従来の有限角モータでは、電磁鋼板により固定子が構成されるので、保磁力が５０Ａ／ｍと大きくなり、前記ヒステリシスループに広がりが生じる。このため、前記可動子が往復運動される際に、残留磁気の影響により所望の磁束が得られず、駆動トルクにバラツキが生じてしまう。   Here, since the stator is made of a magnetic material, a hysteresis loop exists in the magnetic characteristics of the stator. In general, in the conventional finite angle motor as described above, since the stator is composed of electromagnetic steel plates, the coercive force is as large as 50 A / m, and the hysteresis loop is expanded. For this reason, when the mover is reciprocated, a desired magnetic flux cannot be obtained due to the influence of residual magnetism, and the drive torque varies.

本発明は、上記のような課題を解決するためになされたものであり、その目的は、固定子の保磁力を小さくでき、可動子が往復運動する際の駆動トルクのバラツキを低減できる有限角モータを提供することである。   The present invention has been made in order to solve the above-described problems, and its purpose is to reduce the coercive force of the stator and to reduce the variation in driving torque when the mover reciprocates. It is to provide a motor.

本発明に係る有限角モータは、固定子基部、前記固定子基部の基部端面から突出された第１磁極、及び前記基部端面から突出されるとともに前記第１磁極の両側に配置された一対の第２磁極を有する固定子と、前記第１磁極と前記各第２磁極との間のスロットに配設されたコイルと、前記第１磁極の第１先端部及び前記各第２磁極の第２先端部に対向し、駆動軸を中心に回動可能な可動子と、前記可動子に設けられた永久磁石とを備え、前記コイルと前記永久磁石との間に発生する反発力によって、前記可動子が前記駆動軸を中心に所定の有限角で駆動される有限角モータであって、前記各第２磁極の前記第２先端部には、該第２先端部の内側面から前記第１磁極に向かって突出する縁部がそれぞれ設けられているとともに、前記各第２磁極の前記第２先端部の外側面は平面状に形成されており、前記固定子がパーマロイにより構成されており、前記固定子の保磁力が１０Ａ／ｍとされている。 A finite angle motor according to the present invention includes a stator base, a first magnetic pole protruding from a base end face of the stator base, and a pair of first poles protruding from the base end face and disposed on both sides of the first magnetic pole. A stator having two magnetic poles , a coil disposed in a slot between the first magnetic pole and each second magnetic pole, a first tip of the first magnetic pole, and a second tip of the second magnetic pole A movable element that faces the portion and is rotatable about a drive shaft, and a permanent magnet provided on the movable element, and the movable element is formed by a repulsive force generated between the coil and the permanent magnet. Is a finite angle motor driven at a predetermined finite angle around the drive shaft, and the second tip of each second magnetic pole is connected to the first magnetic pole from the inner surface of the second tip. Edge portions projecting toward each other, and the second magnetic poles An outer surface of the second tip portion is formed in a planar shape, the stator is constituted by a permalloy, the coercive force of the stator is a 10A / m.

本発明の有限角モータによれば、前記固定子がパーマロイにより構成され、前記固定子の保磁力が１０Ａ／ｍとされているので、電磁鋼板により固定子を構成する場合に比べて固定子の保磁力を小さくでき、可動子が往復運動する際の駆動トルクのバラツキを低減できる。   According to the finite angle motor of the present invention, the stator is made of permalloy, and the stator has a coercive force of 10 A / m. The coercive force can be reduced, and variations in driving torque when the mover reciprocates can be reduced.

以下、本発明を実施するための最良の形態について、図面を参照して説明する。
実施の形態１．
図１は本発明の実施の形態１による有限角モータを示す正面図であり、図２は図１の有限角モータを示す側面図であり、図３は図２の有限角モータを示す上面図である。図において、有限角モータは、固定子１０、コイル１５、及び可動子２０により構成されている。前記固定子１０には、板状の固定子基部１１が設けられており、この固定子基部１１の基部端面１１ａからは第１磁極１２と一対の第２磁極１３とが内方へ突出されている。前記第１磁極１２は前記固定子基部１１の幅方向Ａに沿う中央に配置されており、前記各第２磁極１３は前記第１磁極１２の両側に配置されている。具体的には、前記各第２磁極１３は、前記固定子基部１１の両側の側端部１１ｂに配設されている。 The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing a finite angle motor according to Embodiment 1 of the present invention, FIG. 2 is a side view showing the finite angle motor of FIG. 1, and FIG. 3 is a top view showing the finite angle motor of FIG. It is. In the figure, the finite angle motor is composed of a stator 10, a coil 15, and a mover 20. The stator 10 is provided with a plate-like stator base 11, and a first magnetic pole 12 and a pair of second magnetic poles 13 project inward from a base end face 11 a of the stator base 11. Yes. The first magnetic pole 12 is disposed at the center along the width direction A of the stator base 11, and the second magnetic poles 13 are disposed on both sides of the first magnetic pole 12. Specifically, each of the second magnetic poles 13 is disposed on the side end portions 11 b on both sides of the stator base portion 11.

前記第１磁極１２と前記各第２磁極１３との間にはスロットが設けられており、このスロットにはコイル１５が配設されている。すなわち、図３に示すように、コイル１５の中心孔１５ａに前記第１磁極１２が挿通されており、コイル１５の両側に前記各第２磁極１３が接している。なお、この実施の形態では、前記コイル１５は例えば自動巻線機等により前記第１磁極１２に巻回されたものである。   A slot is provided between the first magnetic pole 12 and each of the second magnetic poles 13, and a coil 15 is disposed in the slot. That is, as shown in FIG. 3, the first magnetic pole 12 is inserted into the center hole 15 a of the coil 15, and the second magnetic poles 13 are in contact with both sides of the coil 15. In this embodiment, the coil 15 is wound around the first magnetic pole 12 by, for example, an automatic winding machine.

図１に戻り、前記第１磁極１２及び前記各第２磁極１３は第１及び第２先端部１６，１７を有している。前記第１先端部１６には、この第１先端部１６の両側面から前記各第２磁極１３に向かって突出する第１縁部１６ａが設けられており、前記各第２先端部１７には、各第２先端部１７の内側面から前記第１磁極１２に向かって突出する第２縁部１７ａがそれぞれ設けられている。第１及び第２先端部１６，１７の端面には、円弧状の固定子側曲面１８が形成されている。なお、前記各第２先端部１７の第２先端部１７の外側面は平面状に形成されている。   Returning to FIG. 1, the first magnetic pole 12 and the second magnetic poles 13 have first and second tip portions 16 and 17. The first tip end portion 16 is provided with first edge portions 16 a that protrude from both side surfaces of the first tip end portion 16 toward the second magnetic poles 13. The second edge portions 17a projecting from the inner surface of each second tip portion 17 toward the first magnetic pole 12 are provided. Arc-shaped stator side curved surfaces 18 are formed on the end surfaces of the first and second tip portions 16 and 17. The outer surface of the second tip 17 of each second tip 17 is formed in a flat shape.

前記可動子２０は、前記固定子１０に対向して配置されており、扇状の可動子基部２１と永久磁石２２とにより構成されている。前記可動子基部２１は、前記固定子側曲面１８に対向する円弧状の可動子側曲面２３を有しており、駆動軸２４を中心に回動可能に設けられている。前記永久磁石２２は、可動子基部２１の内面すなわち可動子側曲面２３に貼り付けられており、具体的には、互いに異なる極が前記固定子側曲面１８に対向するように配置された一対の磁石片により構成されている。   The mover 20 is disposed so as to face the stator 10, and includes a fan-shaped mover base 21 and a permanent magnet 22. The mover base 21 has an arcuate mover-side curved surface 23 facing the stator-side curved surface 18, and is provided to be rotatable about a drive shaft 24. The permanent magnet 22 is affixed to the inner surface of the mover base 21, that is, the mover-side curved surface 23, and specifically, a pair of poles arranged so that different poles face the stator-side curved surface 18. It is comprised by the magnet piece.

前記コイル１５に通電されると、前記コイル１５と前記永久磁石２２との間に反発力が発生し、この反発力によって、前記可動子基部２１が前記駆動軸２４を中心に駆動される。すなわち、前記コイル１５に流れる電流の向きが順方向と逆方向とで交互に切り換えられることで、前記可動子２０が往復運動される。   When the coil 15 is energized, a repulsive force is generated between the coil 15 and the permanent magnet 22, and the movable element base 21 is driven around the drive shaft 24 by the repulsive force. That is, the direction of the current flowing through the coil 15 is switched alternately between the forward direction and the reverse direction, so that the mover 20 is reciprocated.

次に、図４は、図１の固定子１０の磁気特性を示す説明図である。なお、図４において実線で示すヒステリシスループが固定子１０の磁気特性を示すものであり、点線で示すヒステリシスループは従来の有限角モータにおける固定子の磁気特性を示している。ここで、従来の有限角モータにおける固定子は、電磁鋼板により構成されているので、従来の固定子の保磁力ＣＦｐは図４に示すように５０Ａ／ｍ程度である。このため、電磁鋼板により固定子が構成されると、電流の向きが切り換えられた場合でも磁束密度Ｂが高い状態で保持され、コイル１５に供給される電流値によっては、残留磁気の影響により所望の磁束を得られない。   Next, FIG. 4 is an explanatory diagram showing magnetic characteristics of the stator 10 of FIG. In FIG. 4, the hysteresis loop indicated by the solid line indicates the magnetic characteristic of the stator 10, and the hysteresis loop indicated by the dotted line indicates the magnetic characteristic of the stator in the conventional finite angle motor. Here, since the stator in the conventional finite angle motor is made of an electromagnetic steel plate, the coercive force CFp of the conventional stator is about 50 A / m as shown in FIG. For this reason, when the stator is constituted by the electromagnetic steel plate, the magnetic flux density B is maintained in a high state even when the direction of the current is switched. The magnetic flux cannot be obtained.

これに対して、この実施の形態の固定子１０は、鉄及びニッケルの合金からなるパーマロイで構成されており、この固定子１０の保磁力ＣＦは１０Ａ／ｍまで抑えられている。すなわち、この実施の形態の固定子１０のヒステリシスループの幅は狭く、電流の向きが切り換えられた場合に磁束密度Ｂが感度良く変化される。これにより、従来構成の問題点、すなわち、コイル１５に供給する電流の向きを切り換えた場合に、残留磁気の影響により所望の磁束を得られないという問題点を解消でき、前記可動子２０が往復運動する際の駆動トルクのバラツキを低減できる。   On the other hand, the stator 10 of this embodiment is made of permalloy made of an alloy of iron and nickel, and the coercive force CF of the stator 10 is suppressed to 10 A / m. That is, the width of the hysteresis loop of the stator 10 of this embodiment is narrow, and the magnetic flux density B is changed with high sensitivity when the direction of the current is switched. As a result, the problem of the conventional configuration, that is, the problem that the desired magnetic flux cannot be obtained due to the influence of the residual magnetism when the direction of the current supplied to the coil 15 is switched can be solved. It is possible to reduce variations in driving torque when exercising.

本発明の実施の形態１による有限角モータを示す正面図である。It is a front view which shows the finite angle motor by Embodiment 1 of this invention. 図１の有限角モータを示す側面図である。It is a side view which shows the finite angle motor of FIG. 図３は図２の有限角モータを示す上面図である。FIG. 3 is a top view showing the finite angle motor of FIG. 図１の固定子１０の磁気特性を示す説明図である。It is explanatory drawing which shows the magnetic characteristic of the stator 10 of FIG.

符号の説明Explanation of symbols

１０ 固定子
１２，１３ 第１及び第２磁極
１５ コイル
１６，１７ 第１及び第２先端部
２０ 可動子
２２ 永久磁石
２４ 駆動軸
ＣＦ 保磁力 DESCRIPTION OF SYMBOLS 10 Stator 12, 13 1st and 2nd magnetic pole 15 Coil 16,17 1st and 2nd front-end | tip part 20 Movable element 22 Permanent magnet 24 Drive shaft CF Coercive force

Claims (1)

固定子基部（１１）、前記固定子基部（１１）の基部端面（１１ａ）から突出された第１磁極（１２）、及び前記基部端面（１１ａ）から突出されるとともに前記第１磁極（１２）の両側に配置された一対の第２磁極（１３）を有する固定子（１０）と、
前記第１磁極（１２）と前記各第２磁極（１３）との間のスロットに配設されたコイル（１５）と、
前記第１磁極（１２）の第１先端部（１６）及び前記各第２磁極（１３）の第２先端部（１７）に対向し、駆動軸（２４）を中心に回動可能な可動子（２０）と、
前記可動子（２０）に設けられた永久磁石（２２）と
を備え、
前記コイル（１５）と前記永久磁石（２２）との間に発生する反発力によって、前記可動子（２０）が前記駆動軸（２４）を中心に所定の有限角で駆動される有限角モータであって、
前記各第２磁極（１３）の前記第２先端部（１７）には、該第２先端部（１７）の内側面から前記第１磁極（１２）に向かって突出する縁部（１７ａ）がそれぞれ設けられているとともに、前記各第２磁極（１３）の前記第２先端部（１７）の外側面は平面状に形成されており、
前記固定子（１０）がパーマロイにより構成されており、前記固定子（１０）の保磁力（ＣＦ）が１０Ａ／ｍとされていることを特徴とする有限角モータ。 A stator base (11), a first magnetic pole (12) protruding from a base end face (11a) of the stator base (11), and a first magnetic pole (12) protruding from the base end face (11a) A stator (10) having a pair of second magnetic poles (13) disposed on both sides thereof,
A coil (15) disposed in a slot between the first magnetic pole (12) and each second magnetic pole (13) ;
A mover that faces the first tip (16) of the first magnetic pole (12) and the second tip (17) of each second magnetic pole (13 ) and is rotatable about a drive shaft (24). (20) and
A permanent magnet (22) provided on the mover (20),
A finite angle motor in which the movable element (20) is driven at a predetermined finite angle about the drive shaft (24) by a repulsive force generated between the coil (15) and the permanent magnet (22). There,
The second tip portion (17) of each second magnetic pole (13) has an edge portion (17a) projecting from the inner surface of the second tip portion (17) toward the first magnetic pole (12). The outer surface of the second tip portion (17) of each second magnetic pole (13) is formed in a flat shape.
A finite angle motor, wherein the stator (10) is made of permalloy, and the coercive force (CF) of the stator (10) is 10 A / m .
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