JP2005124259A - Magnetic sensor and motor with brake - Google Patents

Magnetic sensor and motor with brake Download PDF

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JP2005124259A
JP2005124259A JP2003353800A JP2003353800A JP2005124259A JP 2005124259 A JP2005124259 A JP 2005124259A JP 2003353800 A JP2003353800 A JP 2003353800A JP 2003353800 A JP2003353800 A JP 2003353800A JP 2005124259 A JP2005124259 A JP 2005124259A
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magnetic
magnetic sensor
electromagnetic brake
rotor
brake
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Mutsumi Matsumoto
松元　　睦
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor capable of reducing the effect of leakage flux from an electromagnetic brake on the magnetic sensor section of a detector. <P>SOLUTION: A motor comprising a rotor provided with a permanent magnet 8 and a shaft 7 made of a magnetic material, and a stator applied with winding 9 is further provided with a rotational position detector 4 consisting of a magnetic body on the rotor side and a magnetic sensor 5 on the stator side reacting on the magnetism from the magnetic body, and an electromagnetic brake 1 consisting of a core yoke 1a on the stator side, a winding 1e for exciting the core yoke 1a, a movable armature 1b being attracted through excitation of the core yoke 1a, and a rotary disc 1d on the rotor side being pressed by the armature 1b to move in the axial direction of the rotor wherein a heat conduction interrupting plate 3 made of a magnetic material is disposed between the electromagnetic brake 1 and the magnetic sensor 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、永久磁石と磁性材質製シャフトを備えた回転子と、巻線を備えた固定子とを有する電動機に関するもので、特にさらに磁気センサを用いた回転位置検出器と電磁ブレーキとを有する電動機に関する。   The present invention relates to an electric motor having a rotor having a permanent magnet and a shaft made of a magnetic material, and a stator having a winding, and more particularly, includes a rotational position detector using a magnetic sensor and an electromagnetic brake. It relates to an electric motor.

固定子側に設けられた巻線埋設鉄心ヨークおよび該鉄心ヨークの励磁により吸引され可動するアーマチュアと、回転子側に設けられ前記アーマチュアに押圧されて回転子の軸方向に可動する回転円板とから成る電磁ブレーキとを有する電動機は公知である（例えば、特許文献１参照）。
特開平５−３１６６８５号公報 A winding-buried iron core yoke provided on the stator side, an armature that is attracted and moved by excitation of the iron core yoke, and a rotating disk that is provided on the rotor side and that is pressed by the armature and moves in the axial direction of the rotor An electric motor having an electromagnetic brake is known (for example, see Patent Document 1).
JP-A-5-316685

上記特許文献１に記載の電磁ブレーキは、無励磁作動形円板ブレーキ装置の制動状態の固定鉄心と可動鉄心の間隙を容易に調整できるようにするもので、固定鉄心を間隔管と円周方向に長い挿通穴を設けた環状板とを介してスタッドで固定し、環状板の挿通穴部に間隔管を差し替え可能な深さの異なる複数の座ぐり穴を設け、固定鉄心を緩め環状板を円周方向に移動させて間隔管を適当な他の座ぐり穴に差し替えるようにしたものである。
ところが、このような従来技術の電磁ブレーキは、巻線を埋設した鉄心ヨークとアーマチュアとの閉回路となっており、小型化に対応した構成のため鉄心ヨークの一部に磁気飽和が発生して、鉄心ヨークとアーマチュアを囲むように磁束が漏れ出している。このように電磁ブレーキから漏れ磁束が発生すると、これがシャフト端部にある磁気センサの検出器に達して誤動作をさせる虞があった。
そこで従来は磁気回路を遮断することを目的として、回転子シャフト材質を全部または検出器側の一部をＳＵＳ３０４等の非磁性材質にした構成としていた。 The electromagnetic brake described in the above-mentioned Patent Document 1 makes it possible to easily adjust the gap between the stationary iron core and the movable iron core in the braking state of the non-excitation actuated disc brake device. Fixed with a stud through an annular plate provided with a long insertion hole, and provided with a plurality of counterbore holes with different depths in the insertion hole of the annular plate to allow the interval tube to be replaced. It is moved in the circumferential direction so that the interval tube is replaced with another suitable counterbore.
However, such an electromagnetic brake of the prior art has a closed circuit of an armature yoke and an armature in which windings are embedded, and magnetic saturation occurs in a part of the iron core yoke because of the configuration corresponding to miniaturization. The magnetic flux leaks around the iron core yoke and armature. When leakage magnetic flux is generated from the electromagnetic brake in this way, this may reach the detector of the magnetic sensor at the end of the shaft and cause a malfunction.
Therefore, conventionally, for the purpose of shutting off the magnetic circuit, the rotor shaft is made entirely or partially on the detector side with a non-magnetic material such as SUS304.

図３は電磁ブレーキを有する従来の電動機の要部拡大図である。
図において、１は電磁ブレーキ、１ａは電磁ブレーキ１を構成する鉄心ヨーク、１ｂは同じく電磁ブレーキ１を構成するアーマチュア、２は反負荷側ブラケット（非磁性アルミ）、３は熱伝導遮断板、４は検出器、５は磁気センサ部、６は内扇ファン、７は回転子シャフト、７ａは回転子シャフト７の磁性部、７ｂは回転子シャフト７の非磁性（ＳＵＳ）部、１０は反負荷側軸受である。
電磁ブレーキ１は、常時（非励磁時）アーマチュア１ｂを介して回転円板１ｄをその他側面と対向する制動円板１ｆに押しつけることにより制動作用を行い、励磁によりアーマチュア１ｂを吸引しこれにより制動面を引き離してブレーキを釈放するようになっている。
検出器４は、回転子シャフト７の端部に設けられた回転ディスクに円周方向に交互に異極になるように着磁した多数の磁性体５ａを、固定子側の磁気センサ部５で検出することにより、回転子シャフト７の位置を検出している。
図において、電磁ブレーキ１からの漏れ磁束が磁気センサ部５に行かないように遮断するため、回転子シャフト７は全部または検出器側の一部を非磁性材質（特にＳＵＳ）にした構成としている。このようにすることにより、漏れ磁束は矢印で示すように磁束が磁気センサ部５に行かないようになる。
しかしながら、回転子シャフトには電動機の出力を伝達するため強度が必要であり、そのために非磁性ＳＵＳシャフトが採用されると素材が高価でかつ切削加工時間がかかり、費用がかかるという欠点があった。
また、漏れ磁束の大きさによって、あるいは、電磁ブレーキと磁気センサ部の距離によっては、その影響が許容値を超えるという問題点も抱えていた。 FIG. 3 is an enlarged view of a main part of a conventional electric motor having an electromagnetic brake.
In the figure, 1 is an electromagnetic brake, 1a is an iron core yoke that constitutes the electromagnetic brake 1, 1b is an armature that also constitutes the electromagnetic brake 1, 2 is an anti-load side bracket (nonmagnetic aluminum), 3 is a heat conduction blocking plate, 4 Is a detector, 5 is a magnetic sensor, 6 is an internal fan, 7 is a rotor shaft, 7a is a magnetic part of the rotor shaft 7, 7b is a non-magnetic (SUS) part of the rotor shaft 7, and 10 is an anti-load. Side bearing.
The electromagnetic brake 1 performs a braking action by pressing the rotating disk 1d against the braking disk 1f opposed to the other side surface through the armature 1b at all times (non-excitation), and attracts the armature 1b by excitation, thereby causing the braking surface. To release the brake.
The detector 4 includes a plurality of magnetic bodies 5a magnetized so as to have different polarities in the circumferential direction alternately on a rotating disk provided at the end of the rotor shaft 7 by a magnetic sensor unit 5 on the stator side. By detecting, the position of the rotor shaft 7 is detected.
In the figure, in order to block leakage magnetic flux from the electromagnetic brake 1 so as not to go to the magnetic sensor unit 5, the rotor shaft 7 has a configuration in which all or part of the detector side is made of a nonmagnetic material (especially SUS). . By doing so, the magnetic flux leakage does not go to the magnetic sensor unit 5 as indicated by arrows.
However, the rotor shaft needs strength to transmit the output of the electric motor. For this reason, when a non-magnetic SUS shaft is used, the material is expensive, and it takes time for cutting and costs. .
In addition, depending on the magnitude of the leakage magnetic flux or the distance between the electromagnetic brake and the magnetic sensor unit, there is a problem that the influence exceeds the allowable value.

そこで、本発明はこのような問題点に鑑みてなされたものであり、従来装置の備えた部品の元来の機能を失わせることなく、機能を付加することにより、回転子シャフトを標準材質にすることが出来、安価で性能、品質ともに優れた磁気遮蔽構造の電動機を提供することを目的とする。   Therefore, the present invention has been made in view of such problems, and by adding functions without losing the original functions of the parts of the conventional apparatus, the rotor shaft is made of a standard material. An object of the present invention is to provide an electric motor having a magnetic shielding structure that is inexpensive, excellent in performance and quality.

上記問題を解決するため、請求項１記載の磁気センサおよびブレーキ付き電動機の発明は、永久磁石と磁性材質製シャフトを備えた回転子と、巻線を備えた固定子とを有する電動機であって、前記回転子側に設けられた磁性体と前記固定子側に設けられ前記磁性体からの磁気に反応する磁気センサとから成る回転位置検出器と、前記固定子側に設けられた鉄心ヨーク並びに該鉄心ヨークを励磁する巻線および該鉄心ヨークの励磁により吸引され可動するアーマチュアと、前記回転子側に設けられ前記アーマチュアに押圧されて回転子の軸方向に可動する回転円板とから成る電磁ブレーキと、を有する電動機において、前記電磁ブレーキと前記磁気センサとの間に磁性材質の熱伝導遮断板を配置したことを特徴とする。
請求項２記載の発明は、請求項１記載の磁気センサおよびブレーキ付き電動機において、前記磁性材質製熱伝導遮断板が磁性樹脂及び／又は磁性金属を埋設したものであることを特徴とする。
請求項３記載の発明は、請求項１又は２記載の磁気センサおよびブレーキ付き電動機において、前記電磁ブレーキと前記検出器との間に配置した冷却用内扇ファンを磁性材質としたことを特徴とする。 In order to solve the above problem, the invention of the magnetic sensor and the motor with brake according to claim 1 is an electric motor having a rotor having a permanent magnet and a shaft made of a magnetic material, and a stator having a winding. A rotational position detector comprising a magnetic body provided on the rotor side and a magnetic sensor provided on the stator side and reacting to magnetism from the magnetic body; an iron core yoke provided on the stator side; An electromagnetic comprising a winding for exciting the iron core yoke, an armature that is attracted and moved by the excitation of the iron core yoke, and a rotating disk that is provided on the rotor side and that is pressed by the armature and moves in the axial direction of the rotor. In an electric motor having a brake, a heat conduction blocking plate made of a magnetic material is disposed between the electromagnetic brake and the magnetic sensor.
According to a second aspect of the present invention, in the magnetic sensor and the electric motor with brake according to the first aspect, the heat conduction blocking plate made of a magnetic material has a magnetic resin and / or magnetic metal embedded therein.
According to a third aspect of the present invention, in the magnetic sensor and the electric motor with a brake according to the first or second aspect, the cooling internal fan disposed between the electromagnetic brake and the detector is made of a magnetic material. To do.

以上のように、請求項１に記載の発明によれば、電磁ブレーキと検出器との間の電磁ブレーキの鉄心ヨークの反アーマチュア側に設置された熱伝導率が低く、磁性材質の熱伝導遮断板で電磁ブレーキの漏れ磁束が磁気センサに与える影響を小さくしたので、鉄心ヨークとアーマチュアを囲むように流れる漏れ磁束を積極的に吸収することが出来、磁気センサ部への漏れ磁束の影響を小さくすることが出来る。
請求項２に記載の発明によれば、磁性材質製熱伝導遮断板が磁性樹脂あるいは磁性金属を埋設したものであるので、漏れ磁束を積極的に吸収することが出来、磁気センサ部への漏れ磁束の影響を小さくすることが出来る。
請求項３の発明によれば、磁性材質の冷却用内扇ファンを併用することで、回転子シャフトに流れる漏れ磁束を、前記磁性熱伝導遮断板にさらに積極的に流す効果があり、電磁ブレーキの漏れ磁束が磁気センサに与える影響を小さくすることが出来る。
以上のように、本発明によれば、回転子シャフトは磁性の標準的で安価なものが適用できる。なお、漏れ磁束の影響が大きい場合には従来の方式と併用も可能である。このように、回転子シャフトを標準材質にすることが出来、安価で性能、品質ともに優れた磁気遮蔽構造が得られるという効果がある。 As described above, according to the first aspect of the present invention, the thermal conductivity of the electromagnetic brake disposed between the electromagnetic brake and the detector on the non-armature side of the iron core yoke is low, and the heat conduction of the magnetic material is cut off. Since the influence of the leakage magnetic flux of the electromagnetic brake on the magnetic sensor is reduced by the plate, the leakage magnetic flux flowing around the iron core yoke and the armature can be actively absorbed, and the influence of the leakage magnetic flux on the magnetic sensor is reduced. I can do it.
According to the second aspect of the present invention, since the heat conduction blocking plate made of a magnetic material is embedded with magnetic resin or magnetic metal, it can actively absorb the leakage magnetic flux and leak to the magnetic sensor unit. The influence of magnetic flux can be reduced.
According to the invention of claim 3, by using the cooling fan made of a magnetic material together, there is an effect of more actively flowing the leakage magnetic flux flowing through the rotor shaft to the magnetic heat conduction blocking plate. The influence of the leakage magnetic flux on the magnetic sensor can be reduced.
As described above, according to the present invention, the standard and inexpensive magnetic rotor shaft can be applied. In addition, when the influence of the leakage magnetic flux is large, the conventional method can be used together. In this way, the rotor shaft can be made of a standard material, and there is an effect that a magnetic shielding structure excellent in performance and quality can be obtained at low cost.

以下、本発明の具体的実施例を図に基づいて説明する。
図１は本発明に係る電動機全体の構造を示す一部縦断面図である。
図において、１は電磁ブレーキ、１ａは電磁ブレーキ１を構成する鉄心ヨーク、１ｂは同じく電磁ブレーキ１を構成するアーマチュア、２は反負荷側ブラケット（非磁性アルミ）、３は熱伝導遮断板、４は検出器、５は磁気センサ部、６は内扇ファン、７は回転子シャフト、７ａは回転子シャフト７の磁性部、８は永久磁石、９は固定子巻線、1０は反負荷側軸受、１１は負荷側軸受である。
電磁ブレーキ１は、無励磁で作動するタイプの円板型ブレーキ装置を示している。反負荷側ブラケット２の端面に電磁ブレーキ１の鉄心ヨーク１ａが設けられ、アーマチュア１ｂは、反負荷側ブラケット２の端部で反負荷側軸受１０によって回転可能に支持されている回転子シャフト７に嵌着したセンタハブ１ｃの外周にスプラインでかみ合って軸方向に移動可能にはめ込んだ回転円板１ｄの一側面側にこれと軸方向に対向して、軸方向に移動可能に設けられている。
また、この鉄心ヨーク１ａのアーマチュア１ｂ側端面部に設けてアーマチュア１ｂを回転円板１ｄに向け常時押圧する制動ばね（図示なし）が設けられ、この制動ばねの押圧力で回転円板１ｄを制動円板１ｆに押圧し、回転子シャフト７に制動をかけている。可動鉄心側端面部には環状の電磁コイル１ｅが設けられ、これの励磁によってアーマチュア１ｂは鉄心ヨーク１ａ側に吸引され、ブレーキ動作が解除となる。
このようにこの電磁ブレーキ１は、制動ばねでアーマチュア１ｂを介して回転円１ｄをその他側面と対向する制動円板１ｆに押しつけることにより制動作用を行い、この状態で電磁コイル１を励磁するとこれに伴うアーマチュア１ｂの電磁吸引力で前記制動ばねの押圧力に抗してアーマチュア１ｂを吸引しこれにより制動面を引き離してブレーキを釈放するようになっている。
検出器４は、回転子シャフト７の端部に設けられた回転ディスクに円周方向に交互に異極になるように着磁した多数の磁性体（磁石）５ａであり、これを反負荷側ブラケット２の端部に熱伝導遮断板３を介して取り付けられた磁気センサ部５で検出することにより、回転子シャフト７の位置を検出している。
また、電動機から発生する多数の熱を外部に放出するため、通常、内扇ファン６が回転子シャフト７に設けられ、回転子シャフト７の回転中は内扇ファン６も回転して電動機から発生する多数の熱を外部に放出している。 Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial longitudinal sectional view showing the entire structure of an electric motor according to the present invention.
In the figure, 1 is an electromagnetic brake, 1a is an iron core yoke that constitutes the electromagnetic brake 1, 1b is an armature that also constitutes the electromagnetic brake 1, 2 is an anti-load side bracket (nonmagnetic aluminum), 3 is a heat conduction blocking plate, 4 Is a detector, 5 is a magnetic sensor unit, 6 is an internal fan, 7 is a rotor shaft, 7a is a magnetic part of the rotor shaft 7, 8 is a permanent magnet, 9 is a stator winding, and 10 is an anti-load side bearing. , 11 are load side bearings.
The electromagnetic brake 1 is a disk type brake device that operates without excitation. The iron yoke 1a of the electromagnetic brake 1 is provided on the end face of the anti-load side bracket 2, and the armature 1b is supported on the rotor shaft 7 rotatably supported by the anti-load side bearing 10 at the end of the anti-load side bracket 2. It is provided on one side of the rotating disk 1d that is engaged with the outer periphery of the fitted center hub 1c by a spline so as to be movable in the axial direction so as to be axially opposed to the rotating disk 1d.
Further, a brake spring (not shown) is provided on the armature 1b side end surface portion of the iron core yoke 1a to constantly press the armature 1b toward the rotating disk 1d, and the rotating disk 1d is braked by the pressing force of the braking spring. The rotor shaft 7 is braked by pressing against the disc 1f. An annular electromagnetic coil 1e is provided on the end surface of the movable iron core, and the armature 1b is attracted to the iron yoke 1a side by excitation thereof, and the brake operation is released.
In this way, the electromagnetic brake 1 performs a braking action by pressing the rotating circle 1d against the braking disk 1f facing the other side surface via the armature 1b with a braking spring, and when the electromagnetic coil 1 is excited in this state, The armature 1b is attracted against the pressing force of the braking spring by the electromagnetic attraction force of the armature 1b, and the braking surface is separated to release the brake.
The detector 4 is a large number of magnetic bodies (magnets) 5a magnetized on the rotating disk provided at the end of the rotor shaft 7 so as to have different polarities alternately in the circumferential direction. The position of the rotor shaft 7 is detected by detecting with the magnetic sensor part 5 attached to the end part of the bracket 2 via the heat conduction blocking plate 3.
Further, in order to release a large amount of heat generated from the electric motor to the outside, the inner fan fan 6 is usually provided on the rotor shaft 7, and the inner fan fan 6 also rotates and is generated from the electric motor while the rotor shaft 7 is rotating. A lot of heat is released to the outside.

図２は、図１における本発明の要部拡大図である。
図において、電磁ブレーキ１から発生される磁束の流れを多数の矢印で示している。電磁ブレーキ１が励磁されると、鉄心ヨーク１ａにアーマチュア１ｂが吸引され、回転円板１ｄは制動円板１ｆとの拘束を解かれブレーキが釈放される。
本発明によれば、熱伝導遮断板３と内扇ファン６とを磁性材質で構成した点が特徴である。このように熱伝導遮断板３と内扇ファン６の材質を磁性にしたので、電磁ブレーキ１から発生する漏れ磁束の多くは矢印で示す方向に回転子シャフト７ａへ流れ、そこから内扇ファン６を経由し、さらに熱伝導遮断板３を通って鉄心ヨーク１ａに戻る。したがって、空隙を通って磁気センサ部５へ進む磁束は激減し、漏れ磁束の影響を低減させることができる。
磁性材質製の熱伝導遮断板３としては磁性樹脂及び／又は磁性金属を埋設したものを使用するのが有利である。
したがって、回転子シャフト７は図３に示す高価な非磁性ＳＵＳシャフトにする必要がなく、ごく標準的な磁性体を使用することができる。このように回転子シャフトを標準材質にすることが出来るので、安価で性能・品質ともに優れた磁気遮蔽ができるという効果がある。 FIG. 2 is an enlarged view of a main part of the present invention in FIG.
In the figure, the flow of magnetic flux generated from the electromagnetic brake 1 is indicated by a number of arrows. When the electromagnetic brake 1 is energized, the armature 1b is attracted to the iron core yoke 1a, the rotating disc 1d is released from the restraint with the braking disc 1f, and the brake is released.
The present invention is characterized in that the heat conduction blocking plate 3 and the inner fan 6 are made of a magnetic material. Since the material of the heat conduction blocking plate 3 and the inner fan 6 is made magnetic in this way, most of the leakage magnetic flux generated from the electromagnetic brake 1 flows to the rotor shaft 7a in the direction indicated by the arrow, and from there the inner fan 6 Through the heat conduction blocking plate 3 and return to the iron core yoke 1a. Therefore, the magnetic flux traveling to the magnetic sensor unit 5 through the gap is drastically reduced, and the influence of the leakage magnetic flux can be reduced.
As the heat conduction blocking plate 3 made of a magnetic material, it is advantageous to use a magnetic resin and / or magnetic metal embedded.
Therefore, the rotor shaft 7 does not need to be an expensive nonmagnetic SUS shaft shown in FIG. 3, and a very standard magnetic material can be used. Thus, since the rotor shaft can be made of a standard material, there is an effect that magnetic shielding with excellent performance and quality can be performed at low cost.

本発明に係る電動機全体の構造を示す一部縦断面図である。It is a partial longitudinal cross-sectional view which shows the structure of the whole electric motor concerning this invention. 図１における本発明の要部の拡大図である。It is an enlarged view of the principal part of this invention in FIG. 電磁ブレーキを有する従来の電動機の要部拡大図である。It is a principal part enlarged view of the conventional electric motor which has an electromagnetic brake.

符号の説明Explanation of symbols

１ 電磁ブレーキ
１ａ 鉄心ヨーク
１ｂ アーマチュア
２ 反負荷側ブラケット（非磁性アルミ）
３ 熱伝導遮断板
４ 検出器
５ 磁気センサ部
５ａ 磁性体（磁石）
６ 内扇ファン
７ 回転子シャフト
７ａ 磁性部
７ｂ 非磁性部
８ 永久磁石
９ 固定子巻線
１０ 反負荷側軸受
１１ 負荷側軸受 1 Electromagnetic brake 1a Iron yoke 1b Armature 2 Anti-load side bracket (Nonmagnetic aluminum)
3 Heat conduction blocking plate 4 Detector 5 Magnetic sensor unit 5a Magnetic body (magnet)
6 Inner fan 7 Rotor shaft 7a Magnetic part 7b Non-magnetic part 8 Permanent magnet 9 Stator winding 10 Anti-load side bearing 11 Load side bearing

Claims (3)

永久磁石と磁性材質製シャフトを備えた回転子と、巻線を備えた固定子とを有する電動機であって、
前記回転子側に設けられた磁性体と前記固定子側に設けられ前記磁性体からの磁気に反応する磁気センサとから成る回転位置検出器と、
前記固定子側に設けられた鉄心ヨーク並びに該鉄心ヨークを励磁する巻線および該鉄心ヨークの励磁により吸引され可動するアーマチュアと、前記回転子側に設けられ前記アーマチュアに押圧されて回転子の軸方向に可動する回転円板とから成る電磁ブレーキと、を有する電動機において、
前記電磁ブレーキと前記磁気センサとの間に磁性材質の熱伝導遮断板を配置したことを特徴とする磁気センサおよびブレーキ付き電動機。 An electric motor having a rotor having a permanent magnet and a shaft made of a magnetic material, and a stator having a winding,
A rotational position detector comprising a magnetic body provided on the rotor side and a magnetic sensor provided on the stator side and reacting to magnetism from the magnetic body;
An iron core yoke provided on the stator side, a winding for exciting the iron core yoke, an armature that is attracted and moved by excitation of the iron core yoke, and a shaft of the rotor that is provided on the rotor side and pressed by the armature In an electric motor having an electromagnetic brake composed of a rotating disk movable in a direction,
A magnetic sensor and a brake-equipped electric motor, wherein a heat conduction blocking plate made of a magnetic material is disposed between the electromagnetic brake and the magnetic sensor. 前記磁性材質製の熱伝導遮断板は磁性樹脂及び／又は磁性金属を埋設したものであることを特徴とする請求項１記載の磁気センサおよびブレーキ付き電動機。   2. A magnetic sensor and an electric motor with brake according to claim 1, wherein the heat conduction blocking plate made of a magnetic material is embedded with magnetic resin and / or magnetic metal. 前記電磁ブレーキと前記検出器との間に配置した冷却用内扇ファンを磁性材質としたことを特徴とする請求項１又は２記載の磁気センサおよびブレーキ付き電動機。   3. A magnetic sensor and an electric motor with a brake according to claim 1, wherein the cooling internal fan disposed between the electromagnetic brake and the detector is made of a magnetic material.
JP2003353800A 2003-10-14 2003-10-14 Magnetic sensor and motor with brake Pending JP2005124259A (en)

Priority Applications (1)

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Publications (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107669A2 (en) 2008-03-31 2009-10-07 Sanyo Denki Co., Ltd. Motor with an electromagnetic brake
JP2011050129A (en) * 2009-08-25 2011-03-10 Yaskawa Electric Corp Motor with electromagnetic brake
JP2011193673A (en) * 2010-03-16 2011-09-29 Nsk Ltd Motor with brake
WO2016056122A1 (en) * 2014-10-10 2016-04-14 株式会社安川電機 Motor and motor encoder
EP2228886B1 (en) * 2009-03-13 2016-05-04 Dunkermotoren GmbH Electric motor
JP2017017826A (en) * 2015-06-30 2017-01-19 日本電産サンキョー株式会社 Motor with brake

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107669A2 (en) 2008-03-31 2009-10-07 Sanyo Denki Co., Ltd. Motor with an electromagnetic brake
EP2107669A3 (en) * 2008-03-31 2010-09-15 Sanyo Denki Co., Ltd. Motor with an electromagnetic brake
US8013485B2 (en) 2008-03-31 2011-09-06 Sanyo Denki Co., Ltd. Motor with an electromagnetic brake
KR101615154B1 (en) 2008-03-31 2016-04-25 산요 덴키 가부시키가이샤 Motor with an electromagnetic brake
EP2228886B1 (en) * 2009-03-13 2016-05-04 Dunkermotoren GmbH Electric motor
JP2011050129A (en) * 2009-08-25 2011-03-10 Yaskawa Electric Corp Motor with electromagnetic brake
JP2011193673A (en) * 2010-03-16 2011-09-29 Nsk Ltd Motor with brake
WO2016056122A1 (en) * 2014-10-10 2016-04-14 株式会社安川電機 Motor and motor encoder
CN106165266A (en) * 2014-10-10 2016-11-23 株式会社安川电机 Motor and motor encoder
JP6057036B2 (en) * 2014-10-10 2017-01-11 株式会社安川電機 Motor and encoder for motor
JP2017017826A (en) * 2015-06-30 2017-01-19 日本電産サンキョー株式会社 Motor with brake

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