JPH0155327B2 - - Google Patents
Info
- Publication number
- JPH0155327B2 JPH0155327B2 JP56040079A JP4007981A JPH0155327B2 JP H0155327 B2 JPH0155327 B2 JP H0155327B2 JP 56040079 A JP56040079 A JP 56040079A JP 4007981 A JP4007981 A JP 4007981A JP H0155327 B2 JPH0155327 B2 JP H0155327B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- armature
- permanent magnet
- excitation coil
- magnetic
- 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.)
- Expired
Links
- 230000004907 flux Effects 0.000 claims abstract description 39
- 230000005284 excitation Effects 0.000 claims description 43
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/10—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
- F16D27/108—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members
- F16D27/112—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D27/004—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with permanent magnets combined with electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
- F16D2027/008—Details relating to the magnetic circuit, or to the shape of the clutch parts to achieve a certain magnetic path
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は主として永久磁石の吸引力によつて駆
動側と被被動側のの回転体相互を動力的に結合さ
せ或は被制動体に制動をかけ、その結合、および
制動の解除を電磁コイルによる励磁によつて行な
う所調永久磁石作動形の電磁クラツチ、またはブ
レーキの磁石部として用いられる磁気吸着装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention mainly utilizes the attractive force of permanent magnets to dynamically couple rotating bodies on the driving side and driven side, or to apply braking to the braked bodies, and the coupling and The present invention relates to an electromagnetic clutch of a controlled permanent magnet operation type in which braking is released by excitation of an electromagnetic coil, or to a magnetic attraction device used as a magnet part of a brake.
例えば上記永久磁石作動形電磁ブレーキの場合
永久磁石による磁束にもとづきアーマチユアを吸
引させてブレーキ力を発生させる一方ブレーキ力
の開放は、励磁コイルに電流を供給し、これによ
つて生じる磁束を永久磁石の磁束方向と反対方向
に発生させ、永久磁石によるブレーキ力を打ち消
し、そのブレーキトルクを零にするようにしてい
る。 For example, in the case of the above permanent magnet actuated electromagnetic brake, the armature is attracted based on the magnetic flux of the permanent magnet to generate braking force, while the brake force is released by supplying current to the excitation coil, and the magnetic flux generated by this is transferred to the permanent magnet. The magnetic flux is generated in the opposite direction to the magnetic flux direction of the permanent magnet, thereby canceling out the braking force caused by the permanent magnet and reducing the braking torque to zero.
しかし励磁コイルによる励磁電流を、永久磁石
による磁束が完全に打ち消された後、更に増加さ
せると、これについてその励磁力によるブレーキ
トルクが発生してくることとなる。そして両電磁
力が丁度打ち消し合うのは互の磁力が全く等しい
ときのみであり、何れかがわずかでも大きいと、
その差だけ磁束を発生してアーマチユアが吸引さ
れるのでブレーキトルクは完全に零とならない。 However, if the excitation current from the excitation coil is further increased after the magnetic flux from the permanent magnet has been completely canceled out, a braking torque will be generated due to the excitation force. And the two electromagnetic forces exactly cancel each other out only when the mutual magnetic forces are exactly equal, and if one of them is even slightly larger,
Since magnetic flux is generated by the difference and the armature is attracted, the brake torque does not become completely zero.
つまり、発生ブレーキトルクを完全に零とする
励磁電流値の巾はほとんど皆無に近く、ために永
久磁石特性等のわずかのバラツキ等により、上記
発生ブレーキトルクを零値にする励磁電流値が変
化することとなり、ブレーキ作用の安定を欠くこ
ととなる。 In other words, the width of the excitation current value that makes the generated brake torque completely zero is almost non-existent, and therefore, due to slight variations in the permanent magnet characteristics, etc., the excitation current value that makes the generated brake torque become zero value changes. As a result, the braking action becomes unstable.
本発明は発生ブレーキトルクを零とするべき励
磁コイルによる励磁電流値に巾を持たせ、永久磁
石特性等に多少のばらつきがあつても安定したブ
レーキ特性を有せしめることのできるその磁石部
となる磁気吸着装置を提供するものである。 The present invention provides a range of excitation current values by an excitation coil that should reduce the generated brake torque to zero, and provides a magnet portion that can provide stable braking characteristics even if there are slight variations in permanent magnet characteristics. A magnetic adsorption device is provided.
以下図示する実施例について本発明を説明する
に、各図面は夫々ブレーキに本発明を実施した場
合を示すもので、先づ第１図に示す実施例におい
て１は円盤状のアーマチユアで被制御軸（図示せ
ず）に嵌着され軸方向に対して不動となつてい
る。２，３は夫々同心的に径方向に配置された筒
状のヨークで両者の両端に亘るフエーシング４で
機械的に結合され、かつ内方のヨーク３の内周に
おいて支持筒５上にスプライン結合され、この支
持筒上を軸方向へ摺動できるようになつている。
なお、ヨーク２，３の左端は磁極となつており、
この磁極面においてフエーシングと共に上記アー
マチユアの側面に対向している。支持筒５は斯る
ブレーキを備える機械等の適所に固定される。６
は内、外周面を磁端面とする環状の永久磁石で外
方磁極部においてヨーク２の右端内周に固着され
る。７は永久磁石６の左方にあつて両ヨーク２，
３間に収容された励磁コイルで支持筒５上に軸受
８を介して支承された支持腕９に固着される。本
実施例はクラツチ兼用形のブレーキに本発明を実
施した場合を示すものでクラツチとして用いる場
合、支持筒５は駆動側或は被動側の回転体となる
ので、その都合支持筒５上に励磁コイル７を軸受
８の介在によつてその支持筒５と相対回転可能に
支承させるようにしたがブレーキ専用の場合は、
軸受８を省略し、支持腕９を支持筒５に直接取り
付けてもよい。 To explain the present invention with reference to the embodiments shown below, each drawing shows a case in which the present invention is applied to a brake. First, in the embodiment shown in FIG. (not shown) and is fixed in the axial direction. 2 and 3 are cylindrical yokes that are arranged concentrically in the radial direction, and are mechanically connected by facings 4 extending over both ends thereof, and are spline-connected on the support cylinder 5 at the inner periphery of the inner yoke 3. It is designed to be able to slide on this support cylinder in the axial direction.
Note that the left ends of yokes 2 and 3 are magnetic poles,
This magnetic pole face faces the side surface of the armature together with the facing. The support tube 5 is fixed in place on a machine or the like equipped with such a brake. 6
is an annular permanent magnet whose inner and outer circumferential surfaces are magnetic end faces, and is fixed to the inner circumference of the right end of the yoke 2 at the outer magnetic pole portion. 7 is on the left side of the permanent magnet 6, and both yokes 2,
The excitation coil housed between 3 and 3 is fixed to a support arm 9 supported on a support cylinder 5 via a bearing 8. This embodiment shows the case where the present invention is applied to a brake that also serves as a clutch. When used as a clutch, the support cylinder 5 becomes a rotating body on the driving side or the driven side. Although the coil 7 is supported so as to be rotatable relative to the support tube 5 through the interposition of a bearing 8, when the coil 7 is used exclusively for brakes,
The bearing 8 may be omitted and the support arm 9 may be directly attached to the support cylinder 5.
本発明の１実施例は以上で構成され、励磁コイ
ル７に電流が供給されていないときには永久磁石
６により、この永久磁石から出てヨーク２、アー
マチユア１、ヨーク３、および支持腕９の部分を
通つて永久磁石６に戻る経路で流れる磁束Φ1を
生じ、これに基づく電磁吸引力がヨーク２，３の
磁端部とアーマチユア１間に働きのでヨーク２，
３はアーマチユア１側に引き付けられ、このアー
マチユアとフエージング４との接触摩擦によつて
そのアーマチユア、従つてこれに結合された被制
動体に制動がかけられる。 One embodiment of the present invention is constructed as described above, and when no current is supplied to the excitation coil 7, the permanent magnet 6 moves the yoke 2, the armature 1, the yoke 3, and the support arm 9 from the permanent magnet. The magnetic flux Φ 1 that flows through the path and returns to the permanent magnet 6 is generated, and the electromagnetic attractive force based on this acts between the magnetic ends of the yokes 2 and 3 and the armature 1, so that the yokes 2 and
3 is attracted toward the armature 1, and the contact friction between this armature and fading 4 applies braking to the armature and, therefore, to the braked body connected thereto.
また、励磁コイル７に電流を、この電流によつ
て生じる軸束Φ2が永久磁石６によつて生じる磁
束Φ1を打ち消す方向に供給し、かつ、この電流
の大きさを漸次増大させて行くと、ヨーク２，３
の磁極部とアーマチユア１間の電磁吸引力は次第
に減少するので、それに応じ発生ブレーキトルク
も漸減する。そして、励磁コイル７と永久磁石６
とを軸方向に相対的に移動しないよう一体的に結
合すると同時にヨーク２，３を固定し、更にアー
マチユアをそのヨークに対して近接、離間できる
ようにした通常の従来構造のものであれば、上記
両磁束Φ1とΦ2が等しくなつたときブレーキトル
クは零となり、ブレーキが解決されることにな
り、更に励磁電流を増加させて行けばこれによる
磁束Φ2が増大し、これに基づく吸引力により再
びブレーキがかけられるのであるが、本実施例に
おいてはアーマチユア１側を被制動軸に固定する
ことによりそのアーマチユアを軸方向に対して不
動状態にし、そのアーマチユア、および励磁コイ
ルに対し、ヨーク２，３側を永久磁石６と共に軸
方向へ移動できるようにしたので励磁コイル７に
よつて発生する磁束Φ1の漸減過程で、その磁速
Φ2が永久磁石６による磁束Φ1と等しくなる以前
においてブレーキが解放されることとなる。 Further, a current is supplied to the excitation coil 7 in a direction in which the axial flux Φ 2 generated by this current cancels the magnetic flux Φ 1 generated by the permanent magnet 6, and the magnitude of this current is gradually increased. and yokes 2 and 3
Since the electromagnetic attractive force between the magnetic pole part and the armature 1 gradually decreases, the generated brake torque also gradually decreases accordingly. Then, the excitation coil 7 and the permanent magnet 6
If it has a normal conventional structure in which the yokes 2 and 3 are fixed together so that they do not move relative to each other in the axial direction, and the armature can be moved close to and separated from the yoke, When the above-mentioned magnetic fluxes Φ 1 and Φ 2 become equal, the brake torque becomes zero, and the brake is resolved.If the exciting current is further increased, the magnetic flux Φ 2 due to this increases, and the attraction based on this increases. The brake is applied again by force, but in this embodiment, the armature 1 side is fixed to the shaft to be braked to make the armature immobile in the axial direction, and the yoke is applied to the armature and the excitation coil. Since the 2 and 3 sides are made to be able to move in the axial direction together with the permanent magnet 6, in the process of gradual decrease of the magnetic flux Φ 1 generated by the excitation coil 7, its magnetic velocity Φ 2 becomes equal to the magnetic flux Φ 1 due to the permanent magnet 6. The brake will be released before.
即ち、永久磁石６によつて生じる磁束としては
上記磁束Φ1の外に同図に波線で示す空間を通る
磁束が発生しており、また励磁コイル７によつて
励磁した場合、これによつて生じる上記磁束Φ1
の外同図に波線で示す空間を通る磁束Φ4が発生
しており、この磁束Φ4と、特に上記永久磁石に
よつて生じる空間磁束のうちの励磁コイル側を通
る磁束Φ3に注目した場合、これ等両磁束Φ3とΦ4
は同一空幅を共有し、その方向は同一なので永久
磁石と励磁コイル間に軸方向に反発力を生じるこ
ととなり、そしてこの反撥力は、励磁コイル７の
励磁電流を増大させるにつれて、その空間を通る
上記磁束Φ3Φ4は大きくなるので増大することと
なる。なお、磁束Φ3，Φ4は上記従来の通常形の
永久磁石作動形の電磁ブレーキにおいても生じ、
これに基づく反撥力が励磁コイルと永久磁石間に
働らくが、従来のものではその励磁コイルと永久
磁石とは機械的に一体化されているのでその反発
力は外部に何ら影響を及ぼさない。しかし、本発
明では励磁コイル７と、永久磁石６、従つてこれ
と一体に結合されたヨーク２，３部分とは相対的
に軸方向へ移動できるようになつており、かつ、
アーマチユア１は軸方向に対して移動しないよう
に固定されているので上記反撥力はヨーク２，３
をアーマチユア１から引き離す方向の力として作
用することとなる。そしてこの力をF2とし、上
記のアーマチユア１にヨーク２，３を引き付ける
力をF1とした場合、ブレーキトルクを左右する
アーマチユア１とデイスク４間の摩擦面圧力Ｐ
は、Ｐ＝F1−F2となる。従つて、励磁コイル７
による磁束Φ1の増大過程においてこの磁束Φ1が
永久磁石による磁束Φ1に等しくなる以前にヨー
ク２，３部分がアーマチユアから離間し、ブレー
キは解放され、またこの解放が行われた後におい
ては、上記反撥力に加えヨーク２，３側に磁極面
とアーマチユア１間の磁気空隙は最大限に開かれ
るので励磁コイルによる磁束Φ2を相当大きくし
ないかぎり、ヨーク２，３をアーマチユアに引き
付けさせ、そのデイスクをアーマチユアに圧接さ
せることができない。 That is, as the magnetic flux generated by the permanent magnet 6, in addition to the above-mentioned magnetic flux Φ 1 , a magnetic flux passing through the space indicated by the broken line in the same figure is generated, and when excited by the excitation coil 7, this causes The above magnetic flux generated Φ 1
Outside of this, a magnetic flux Φ 4 is generated that passes through the space indicated by the dotted line in the same figure, and we focused on this magnetic flux Φ 4 and especially the magnetic flux Φ 3 that passes through the excitation coil side of the spatial magnetic flux generated by the above permanent magnet. In this case, both magnetic fluxes Φ 3 and Φ 4
share the same air width and are in the same direction, so a repulsive force is generated in the axial direction between the permanent magnet and the excitation coil, and as the excitation current of the excitation coil 7 increases, this repulsion force expands the space. The magnetic flux Φ 3 Φ 4 passing through becomes large, so it increases. Note that the magnetic fluxes Φ 3 and Φ 4 are also generated in the above-mentioned conventional normal permanent magnet actuated electromagnetic brake.
A repulsive force based on this acts between the excitation coil and the permanent magnet, but in the conventional type, the excitation coil and the permanent magnet are mechanically integrated, so the repulsive force does not have any influence on the outside. However, in the present invention, the excitation coil 7, the permanent magnet 6, and the yokes 2 and 3 integrally connected thereto are relatively movable in the axial direction, and
Since the armature 1 is fixed so as not to move in the axial direction, the above repulsive force is absorbed by the yokes 2 and 3.
This acts as a force in the direction of separating the armature from the armature 1. If this force is F2 , and the force that attracts the yokes 2 and 3 to the armature 1 is F1 , then the friction surface pressure P between the armature 1 and the disc 4, which affects the brake torque, is
becomes P=F 1 -F 2 . Therefore, the excitation coil 7
In the process of increasing the magnetic flux Φ 1 caused by the permanent magnet, the yokes 2 and 3 separate from the armature before this magnetic flux Φ 1 becomes equal to the magnetic flux Φ 1 due to the permanent magnet, and the brake is released, and after this release, In addition to the above repulsive force, the magnetic gap between the magnetic pole surface and the armature 1 on the yokes 2 and 3 side is opened to the maximum, so unless the magnetic flux Φ 2 by the excitation coil is made considerably large, the yokes 2 and 3 will be attracted to the armature, The disk cannot be pressed against the armature.
よつて、上記従来のものでは励磁コイル７に基
づく磁束Φ2と永久磁石に基づく磁束Φ1とわずか
に違うだけでアーマチユアとデイスク間の摩擦面
圧力Ｐが発生したが上記構成のものでは磁束Φ1
とΦ2が等しいときは勿論のこと磁束Φ2が若干上
回つても摩擦面圧力Ｐは生じないこととなり、ブ
レーキトルクを零ならしめる励磁コイルによる励
磁電流値の巾乃範囲を広げることができることと
なる。 Therefore, in the conventional system described above, frictional surface pressure P between the armature and the disk occurs due to a slight difference between the magnetic flux Φ 2 based on the excitation coil 7 and the magnetic flux Φ 1 based on the permanent magnet, but in the above configuration, the magnetic flux Φ 1
Of course, when and Φ 2 are equal, even if the magnetic flux Φ 2 slightly exceeds, no friction surface pressure P will occur, and the range of the excitation current value by the excitation coil that makes the brake torque zero can be expanded. becomes.
第２図は他の実施例を示すもので、この実施例
では永久磁石６を固着したヨーク２，３を励磁コ
イル７に対し、軸方向へ移動させる支承手段とし
て外側ヨーク２の間壁にその周方向に複数個の支
承窓１０を設けると共に、これに対応するコイル
支持腕９を半径方向に夫々設け、これ等支持腕を
上記各窓１０に係合させることにより、ヨーク
２，３部分が窓１０の部分において支持腕９に支
持されたまゝ軸方向へ摺動できるようにしたもの
でその作用効果においては上記第１図に示すもの
と同様である。なお、励磁コイル７は各支持腕９
の先端を本発明によるブレーキを備える図示しな
い相手機械の適所に固定される。 FIG. 2 shows another embodiment, in which a support means is provided on the partition wall of the outer yoke 2 as a support means for moving the yokes 2 and 3 to which a permanent magnet 6 is fixed in the axial direction relative to the excitation coil 7. By providing a plurality of support windows 10 in the circumferential direction, providing corresponding coil support arms 9 in the radial direction, and engaging these support arms with the windows 10, the yokes 2 and 3 can be The window 10 is configured to be able to slide in the axial direction while being supported by the support arm 9, and its operation and effect are similar to those shown in FIG. 1 above. Note that the excitation coil 7 is attached to each support arm 9.
The tip of the brake is fixed in place on a mating machine (not shown) equipped with a brake according to the present invention.
また第２図に示すように磁性板１１を、励磁コ
イル７の、永久磁石６と反対側の端面近傍にあつ
て内、外面ヨーク２，３に亘つて設け、これによ
り励磁コイルによつて発生する磁速のバイパスを
作れば上記の反撥力をより高め、ブレーキトルク
を零ならしめる励磁コイルの励磁電流値の巾を一
層大きくさせることができる。 In addition, as shown in FIG. 2, a magnetic plate 11 is provided near the end face of the excitation coil 7 on the opposite side from the permanent magnet 6, and extends over the inner and outer yokes 2 and 3. By creating a bypass with a magnetic velocity of 1, it is possible to further increase the above-mentioned repulsive force and further increase the width of the excitation current value of the excitation coil that makes the brake torque zero.
なお、実施例はブレーキに本発明を実施した場
合について説明したが、クラツチの場合、第１図
に示すアーマチユア１と支持筒５の、その一方を
駆動側とし、その他方を被動側とするのみである
からその連結トルクを零とする励磁電流値の巾を
大きくする作用については上記ブレーキの場合と
異なるところはない。またブレーキ、またはクラ
ツチの外に磁性材の吸着、釈放に電磁力を利用す
る装置に利用し、その被吸着物の釈放を容易に行
わせることができることは明らかである。 In addition, although the embodiment has been described in the case where the present invention is applied to a brake, in the case of a clutch, only one of the armature 1 and the support tube 5 shown in FIG. 1 is used as the driving side, and the other is used as the driven side. Therefore, the effect of increasing the width of the excitation current value that makes the coupling torque zero is no different from the case of the brake described above. It is clear that the present invention can also be used in a device that uses electromagnetic force to attract and release magnetic materials outside of brakes or clutches, so that the object to be attracted can be easily released.
本発明は上記のように軸方向に固定された励磁
コイル並びにアーマチユア等の被吸着物に対して
これに磁極部を対向させたヨークを永久磁石とと
もに軸方向へ相対的に移動できるようにしたもの
でこの結果、励磁コイルと永久磁石間に生じる反
発力を、ブレーキ或はクラツチの結合トルクの釈
放に作用させ、その結合力を零とする励磁コイル
の励磁電流値の巾を広大させ、ブレーキ、クラツ
チ等の解放特性を安定させることのできる電磁吸
着装置を提供することができる。 As described above, the present invention has an excitation coil fixed in the axial direction and a yoke with a magnetic pole facing an object to be attracted such as an armature, which is movable in the axial direction together with a permanent magnet. As a result, the repulsive force generated between the excitation coil and the permanent magnet acts on the release of the coupling torque of the brake or clutch, and the width of the excitation current value of the excitation coil that makes the coupling force zero is widened. It is possible to provide an electromagnetic adsorption device that can stabilize the release characteristics of a clutch or the like.
図面は本発明の実施例を示すもので、第１図は
１実施例を、第２図は他の実施例を夫々示す断面
図である。
１……アーマチユア、２，３……ヨーク、６…
…永久磁石、７……励磁コイル。
The drawings show embodiments of the present invention; FIG. 1 is a sectional view of one embodiment, and FIG. 2 is a sectional view of another embodiment. 1... Armature, 2, 3... Yoke, 6...
...Permanent magnet, 7...Exciting coil.
Claims (1)
発生させる励磁コイルを設けた磁気吸着装置にお
いて、上記励磁コイルと、アーマチユアの如き被
吸着体とを軸方向に対して不動ならしめ、これ等
励磁コイル並びに被吸着体に対し、この被吸着体
に磁極部を対向させたヨークを上記永久磁石と共
に軸方向へ相対的に移動可能に支承し、上記永久
磁石と励磁コイル間に生じる磁気反発力を、上記
被吸着体とヨークの磁極間に働らく電磁吸引力に
基づく吸着力に対抗させたことを特徴とする電磁
吸着装置。1. In a magnetic attraction device equipped with an excitation coil that generates magnetic flux in a direction that cancels out the magnetic flux produced by a permanent magnet, the excitation coil and an object to be attracted, such as an armature, are made immobile in the axial direction, and these excitation coils and A yoke with a magnetic pole facing the attractable body is supported so as to be movable relative to the permanent magnet in the axial direction, and the magnetic repulsion force generated between the permanent magnet and the excitation coil is controlled by the magnetic repulsion force generated between the permanent magnet and the excitation coil. An electromagnetic adsorption device characterized in that an adsorption force based on an electromagnetic attractive force acting between an object to be adsorbed and a magnetic pole of a yoke is opposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56040079A JPS57154555A (en) | 1981-03-18 | 1981-03-18 | Magnetic adsorption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56040079A JPS57154555A (en) | 1981-03-18 | 1981-03-18 | Magnetic adsorption device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57154555A JPS57154555A (en) | 1982-09-24 |
| JPH0155327B2 true JPH0155327B2 (en) | 1989-11-24 |
Family
ID=12570900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56040079A Granted JPS57154555A (en) | 1981-03-18 | 1981-03-18 | Magnetic adsorption device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57154555A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496922A (en) * | 1983-12-05 | 1985-01-29 | Warner Electric Brake & Clutch Company | Electromagnetically released coupling |
| US20080283352A1 (en) * | 2007-05-17 | 2008-11-20 | Purvines Stephen H | Electromagnetic actuator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS612829Y2 (en) * | 1979-05-31 | 1986-01-29 |
-
1981
- 1981-03-18 JP JP56040079A patent/JPS57154555A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57154555A (en) | 1982-09-24 |
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