JPH075611Y2 - Electromagnetic device - Google Patents
Electromagnetic deviceInfo
- Publication number
- JPH075611Y2 JPH075611Y2 JP12243289U JP12243289U JPH075611Y2 JP H075611 Y2 JPH075611 Y2 JP H075611Y2 JP 12243289 U JP12243289 U JP 12243289U JP 12243289 U JP12243289 U JP 12243289U JP H075611 Y2 JPH075611 Y2 JP H075611Y2
- Authority
- JP
- Japan
- Prior art keywords
- iron core
- fixed iron
- exciting coil
- movable
- movable iron
- 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 - Lifetime
Links
Landscapes
- Electromagnets (AREA)
Description
【考案の詳細な説明】 A.産業上の利用分野 本考案は、フラットな動作力が得られる電磁装置に関す
るものである。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an electromagnetic device capable of obtaining a flat operating force.
B.考案の概要 本考案は、筒状励磁コイル中に挿通される可動鉄心を上
記励磁コイルの付勢によって直線駆動する電磁装置にお
いて、上記励磁コイルの一方開口端に設けられた固定鉄
心に一方端が接離される可動鉄心の他方端部に小径部を
形成し、上記励磁コイルの他方開口端に可動鉄心の段部
を接離させる補助固定鉄心を設けることにより、最大負
荷以上の磁気吸引力で可動鉄心の動作性能を補償するこ
とが可能となり、操作電圧や負荷曲線に依存しない安定
した動作が得られ、かつ可動鉄心の衝撃力を良好に緩和
できるようにしたものである。B. Outline of the Invention The present invention relates to an electromagnetic device in which a movable iron core inserted in a cylindrical exciting coil is linearly driven by the bias of the exciting coil, and a fixed iron core provided at one opening end of the exciting coil is used. By forming a small diameter part at the other end of the movable iron core whose end is contacted and separated, and by providing an auxiliary fixed iron core that connects and disconnects the step part of the movable iron core to the other open end of the excitation coil, the magnetic attraction force above the maximum load. With this, it is possible to compensate the operation performance of the movable core, obtain stable operation that does not depend on the operating voltage and load curve, and sufficiently reduce the impact force of the movable core.
C.従来の技術 周知のように励磁コイルの励磁により可動鉄心を直線方
向に動作させる電磁装置として、第２図に示すように筒
状の励磁コイル21の中空部に可動鉄心22を可動自在に設
けるとともに、この可動鉄心22の一端に操作桿23を設
け、上記励磁コイル21を磁気ヨーク24で囲み、操作桿23
を励磁コイル21の一方開口部に設けた固定鉄心25に貫通
させて、可動鉄心22の可動に応じて操作桿23により負荷
を駆動するようにしたものがある。C. Prior Art As is well known, as an electromagnetic device for moving a movable iron core in a linear direction by exciting a magnetic exciting coil, a movable iron core 22 is movable in a hollow portion of a cylindrical exciting coil 21 as shown in FIG. An operating rod 23 is provided at one end of the movable iron core 22, and the exciting coil 21 is surrounded by a magnetic yoke 24.
There is a type in which a load is driven by an operating rod 23 according to the movement of the movable iron core 22 by penetrating a fixed iron core 25 provided in one opening of the exciting coil 21.
この電磁装置は、励磁コイル21を励磁することにより固
定鉄心25と可動鉄心22との間に磁気吸引力が作用し、固
定鉄心25に可動鉄心22が吸引される。この可動鉄心22の
動作速度は操作電圧に依存し、第３図の実線で示す特性
を有する。この特性によれば、操作電圧に比例して動作
速度が上がるため、操作電圧の許容変動幅の下限電圧で
可動鉄心22の動作性能を補償した場合、操作電圧の許容
変動幅の上限電圧において、可動鉄心22が加速されて固
定鉄心25に過大な機械的衝撃力が加わる。In this electromagnetic device, by exciting the exciting coil 21, a magnetic attraction force acts between the fixed iron core 25 and the movable iron core 22, and the movable iron core 22 is attracted to the fixed iron core 25. The operating speed of the movable iron core 22 depends on the operating voltage and has the characteristic shown by the solid line in FIG. According to this characteristic, since the operating speed increases in proportion to the operating voltage, when the operating performance of the movable iron core 22 is compensated by the lower limit voltage of the allowable fluctuation range of the operating voltage, at the upper limit voltage of the allowable fluctuation range of the operating voltage, The movable iron core 22 is accelerated and an excessive mechanical impact force is applied to the fixed iron core 25.
ところが、実際の使用状態においては可動鉄心22に負荷
が連結されるために、可動鉄心22の動作速度は負荷曲線
に依存することになる。例えば、この電磁装置を遮断器
等の開閉機器の投入用電磁石として用いた場合、固定鉄
心25と可動鉄心22間のギャップＸが最大の時には負荷は
小さく、可動鉄心22が図示左方向に移動しギャップＸの
中間位に達した時に負荷が急激に増大する。However, since the load is connected to the movable core 22 in an actual use state, the operating speed of the movable core 22 depends on the load curve. For example, when this electromagnetic device is used as a closing electromagnet for a switching device such as a circuit breaker, the load is small when the gap X between the fixed iron core 25 and the movable iron core 22 is maximum, and the movable iron core 22 moves to the left in the figure. The load increases rapidly when the middle of the gap X is reached.
このように可動鉄心22が充分に加速されていない状態で
負荷が急激に増大すると、負荷急増位置にて可動鉄心22
の動作速度が極度に低下する。このため、一定速度の運
動が必要な開閉機器に用いる場合には、負荷特性を変更
したり、可動鉄心22の質量を増して慣性力を大きくする
などの対策が必要となる。If the load suddenly increases while the movable iron core 22 is not sufficiently accelerated in this way, the movable iron core 22 is moved to the sudden load increasing position.
The operating speed of is extremely reduced. Therefore, when it is used in a switchgear that requires a constant speed of movement, it is necessary to take measures such as changing the load characteristic or increasing the mass of the movable iron core 22 to increase the inertial force.
D.考案が解決しようとする課題 従来技術の電磁装置は可動鉄心22の動作速度が操作電圧
に依存するために、操作電圧の許容変動幅の上限電圧に
おいて過大な機械的衝撃力が発生するおそれがあり、こ
れにより電磁装置および駆動される負荷側機構部の機械
的寿命が低下する問題がある。しかも、この電磁装置は
可動鉄心22の動作速度が負荷曲線に依存するため、負荷
が急増すると可動鉄心22の動作速度が極度に低下し動作
が不安定になる問題がある。D. Problem to be Solved by the Invention In the electromagnetic device of the prior art, since the operating speed of the movable iron core 22 depends on the operating voltage, an excessive mechanical impact force may occur at the upper limit voltage of the allowable fluctuation range of the operating voltage. Therefore, there is a problem that the mechanical life of the electromagnetic device and the driven load side mechanical unit is reduced. Moreover, since the operating speed of the movable iron core 22 depends on the load curve in this electromagnetic device, there is a problem that the operating speed of the movable iron core 22 is extremely reduced and the operation becomes unstable when the load is rapidly increased.
また一定速度の運動が必要とされる遮断器等において
は、最大負荷時に安定した動作速度が得られるように負
荷特性を変更したり、一定の動作速度が得られるように
可動鉄心22の質量を増やすなどの対策が必要とされてい
る。ところが、このような対策を行うと、消費電力が増
えるとともに小形軽量化を図るうえで不利になるなどの
２次的な問題が発生し得策ではない。For circuit breakers that require constant speed motion, change the load characteristics so that a stable operating speed is obtained at maximum load, or change the mass of the movable iron core 22 so that a constant operating speed is obtained. Measures such as increase are needed. However, if such measures are taken, secondary problems such as increased power consumption and disadvantage in reducing the size and weight are generated, which is not a good idea.
本考案は上記の問題点に着目してなされたもので、操作
電圧や負荷曲線に依存しない安定した動作力が得られ、
かつ可動鉄心の衝撃力を良好に緩和し得る電磁装置を提
供することを目的とする。The present invention was made by focusing on the above-mentioned problems, and a stable operating force independent of the operating voltage and the load curve can be obtained.
Moreover, it is an object of the present invention to provide an electromagnetic device capable of satisfactorily reducing the impact force of the movable iron core.
E.課題を解決するための手段 本考案は上記目的を達成するために、筒状の励磁コイル
と、この励磁コイルの一方開口端に設けられた固定鉄心
と、この固定鉄心に一方端が接離されるように上記励磁
コイルの中空部に可動自在に設けられ他方端部に小径部
を形成した可動鉄心と、上記励磁コイルの他方開口端に
設けられ上記可動鉄心の小径部が挿通されその段部が接
離される補助固定鉄心と、上記励磁コイルを囲むように
設けられた磁気ヨークにより電磁装置を構成する。E. Means for Solving the Problems In order to achieve the above object, the present invention provides a cylindrical exciting coil, a fixed iron core provided at one open end of the exciting coil, and one end of the fixed iron core. A movable core provided movably in the hollow portion of the exciting coil so as to be separated from each other and having a small diameter portion at the other end thereof, and a small diameter portion of the movable iron core provided at the other open end of the exciting coil and inserted through the step. An electromagnetic device is constituted by an auxiliary fixed iron core whose parts are brought into contact with and separated from each other and a magnetic yoke provided so as to surround the exciting coil.
F.作用 補助固定鉄心に可動鉄心の段部が接触しているときに
は、その間の磁気抵抗が固定鉄心と可動鉄心との間の磁
気抵抗に比べて充分に小さくなるために、補助固定鉄心
側に作用する磁気吸引力により可動鉄心は補助固定鉄心
に磁気吸引されて保持される。この状態において、操作
電圧を徐々に上げ固定鉄心側に最大負荷を上回る磁気吸
引力が発生する操作コイル電流が流れると、補助固定鉄
心と可動鉄心との間を透過する磁束が飽和し、補助鉄心
側の磁気吸引力が抑制される。それ以後は、固定鉄心側
の磁気吸引力だけが増大し、補助固定鉄心側の磁気吸引
力に抗して固定鉄心側の磁気吸引力により可動鉄心は固
定鉄心に磁気吸引される。F. Action When the stepped part of the movable iron core is in contact with the auxiliary fixed iron core, the magnetic resistance between them is sufficiently smaller than the magnetic resistance between the fixed iron core and the movable iron core. The movable iron core is magnetically attracted and held by the auxiliary fixed iron core by the magnetic attraction force acting. In this state, the operating voltage is gradually increased, and when an operating coil current that causes a magnetic attraction force exceeding the maximum load flows on the fixed iron core side, the magnetic flux passing between the auxiliary fixed iron core and the movable iron core is saturated, and the auxiliary iron core is saturated. The magnetic attraction force on the side is suppressed. After that, only the magnetic attraction force on the fixed iron core side increases, and the movable iron core is magnetically attracted to the fixed iron core by the magnetic attraction force on the fixed iron core side against the magnetic attraction force on the auxiliary fixed iron core side.
G.実施例 以下、本考案を第１図に示す実施例に基づいて説明す
る。G. Embodiment Hereinafter, the present invention will be described based on an embodiment shown in FIG.
第１図は本考案の一実施例を示す概略的構成図であり、
本図において１は絶縁銅線等を円筒状に巻装した励磁コ
イルで、この励磁コイル１の中空部には、円柱状の基部
2aに段部2bを介して小径部2cを一体に形成してなる可動
鉄心２が可動自在に設けらえている。この可動鉄心２の
基部端面2dと相対向する励磁コイル１の一方開口端に固
定鉄心３が設けられ、また段部2bと相対向する励磁コイ
ル１の他方開口端に補助固定鉄心４が設けられている。
この補助固定鉄心４の透孔に可動鉄心２の小径部2cを挿
通させる。この場合、固定鉄心３の磁極面を補助固定鉄
心４の磁極面に比べて大きく設定し、かつ操作コイル電
流が規定値以上になったとき、補助固定鉄心４を透過す
る磁束が飽和するように補助固定鉄心４の磁極面積を設
定する。すなわち、固定鉄心３側に最大負荷を上回る磁
気吸引力が発生する操作コイル電流が流れたときに、補
助固定鉄心４を透過する磁束が飽和するように設計す
る。図示例では、励磁コイル１の周囲に設けられた磁気
ヨーク５の両端を励磁コイル１の端面に延出し、この延
出部5a,5bに上述の固定鉄心３と補助固定鉄心４を一体
に形成したが、組立が容易になるように固定鉄心３と補
助固定鉄心４を別体に形成するとよい。FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention,
In the figure, reference numeral 1 denotes an exciting coil in which an insulated copper wire or the like is wound in a cylindrical shape. The hollow portion of the exciting coil 1 has a cylindrical base portion.
A movable iron core 2 in which a small-diameter portion 2c is integrally formed on a step 2b on a step 2a is movably provided. A fixed iron core 3 is provided at one open end of the exciting coil 1 facing the base end surface 2d of the movable iron core 2, and an auxiliary fixed iron core 4 is provided at the other open end of the exciting coil 1 facing the stepped portion 2b. ing.
The small diameter portion 2c of the movable iron core 2 is inserted into the through hole of the auxiliary fixed iron core 4. In this case, the magnetic pole surface of the fixed iron core 3 is set to be larger than the magnetic pole surface of the auxiliary fixed iron core 4, and when the operating coil current exceeds a specified value, the magnetic flux passing through the auxiliary fixed iron core 4 is saturated. The magnetic pole area of the auxiliary fixed iron core 4 is set. That is, the magnetic flux passing through the auxiliary fixed core 4 is designed to be saturated when an operating coil current that causes a magnetic attraction force exceeding the maximum load flows on the fixed iron core 3 side. In the illustrated example, both ends of the magnetic yoke 5 provided around the exciting coil 1 are extended to the end face of the exciting coil 1, and the fixed iron core 3 and the auxiliary fixed iron core 4 are integrally formed on the extended portions 5a and 5b. However, it is preferable to form the fixed iron core 3 and the auxiliary fixed iron core 4 separately so as to facilitate the assembly.
一方、可動鉄心２の基部端面2dには、固定鉄心３の透孔
より外部に導出させ、図示しない負荷に連結される操作
桿６が一体に形成されている。On the other hand, the base end surface 2d of the movable iron core 2 is integrally formed with an operating rod 6 which is led out from the through hole of the fixed iron core 3 and is connected to a load (not shown).
次に、この実施例の作用を説明する。Next, the operation of this embodiment will be described.
第１図に示すように、可動鉄心２の段部2bが補助固定鉄
心４に接触した状態で励磁コイル１を励磁すると、磁気
ヨーク5,固定鉄心3,基部2a,補助固定鉄心４からなる磁
気回路にφ1の磁束が透過され、また磁気ヨーク5,固定
鉄心3,基部2a,小径部2c,補助固定鉄心４からなる磁気回
路にφ2の磁束が透過される。動作前は補助固定鉄心４
に可動鉄心２の段部2bが接しているために、段部2bと補
助固定鉄心４との間のギャップＧによる磁気抵抗は基部
2aと固定鉄心３との間のギャップＸによる磁気抵抗に比
べて非常に小さくなる。この状態で励磁コイル１を励磁
すると、操作コイル電流が規定の電流値に達するまでの
間は、補助固定鉄心４側に作用する磁気吸引力の方が固
定鉄心３側に作用する磁気吸引力よりも大きくなる。こ
の補助固定鉄心４側に作用する磁気吸引力により、可動
鉄心２は固定鉄心３側の磁気吸引力に抗して補助固定鉄
心４に磁気吸引され図示位置に保持される。As shown in FIG. 1, when the exciting coil 1 is excited with the stepped portion 2b of the movable iron core 2 in contact with the auxiliary fixed iron core 4, the magnetic yoke 5, the fixed iron core 3, the base 2a, and the auxiliary fixed iron core 4 are magnetically coupled. The magnetic flux of φ 1 is transmitted to the circuit, and the magnetic flux of φ 2 is transmitted to the magnetic circuit including the magnetic yoke 5, the fixed iron core 3, the base portion 2a, the small diameter portion 2c, and the auxiliary fixed iron core 4. Auxiliary fixed iron core 4 before operation
Since the stepped portion 2b of the movable iron core 2 is in contact with, the magnetic resistance due to the gap G between the stepped portion 2b and the auxiliary fixed iron core 4 is
It becomes much smaller than the magnetic resistance due to the gap X between 2a and the fixed iron core 3. When the exciting coil 1 is excited in this state, the magnetic attraction force acting on the auxiliary fixed iron core 4 side is larger than the magnetic attraction force acting on the fixed iron core 3 side until the operating coil current reaches the specified current value. Also grows. Due to the magnetic attraction force acting on the auxiliary fixed core 4 side, the movable iron core 2 is magnetically attracted to the auxiliary fixed iron core 4 against the magnetic attraction force on the fixed iron core 3 side and held at the position shown in the figure.
この状態から操作電圧を徐々に上げ励磁コイル１に流れ
る操作コイル電流が規定値に達すると、補助固定鉄心４
と可動鉄心２の段部2bとの間を透過する磁束φ1が飽和
し、補助固定鉄心４側の磁気吸引力が抑制される。この
とき、固定鉄心３側に最大負荷を上回る磁気吸引力が発
生する。そして、操作コイル電流が規定値以上になる
と、磁束φ1＋φ2により固定鉄心３側に作用する磁気吸
引力のみが増大し、可動鉄心２は図示左方向へと動きだ
す。このとき、ギャップＸが小さくなるにしたがってギ
ャップＸの磁気抵抗は減少し、ギャップＧが大きくなる
にしたがってギャップＧの磁気抵抗は増大するために、
可動鉄心２の動作はは磁束φ2による磁気吸引力により
支配されることになる。これにより、可動鉄心２は補助
固定鉄心４側の磁気吸引力に抗して固定鉄心３に磁気吸
引される。From this state, when the operating voltage is gradually increased and the operating coil current flowing through the exciting coil 1 reaches a specified value, the auxiliary fixed iron core 4
The magnetic flux φ 1 passing between the movable core 2 and the step portion 2b of the movable core 2 is saturated, and the magnetic attraction force on the auxiliary fixed core 4 side is suppressed. At this time, a magnetic attraction force exceeding the maximum load is generated on the fixed iron core 3 side. Then, when the operation coil current exceeds the specified value, only the magnetic attraction force acting on the fixed iron core 3 side due to the magnetic fluxes φ 1 + φ 2 increases, and the movable iron core 2 starts to move to the left in the drawing. At this time, the magnetic resistance of the gap X decreases as the gap X decreases, and the magnetic resistance of the gap G increases as the gap G increases.
The operation of the movable iron core 2 is governed by the magnetic attraction force due to the magnetic flux φ 2 . As a result, the movable iron core 2 is magnetically attracted to the fixed iron core 3 against the magnetic attraction force on the auxiliary fixed iron core 4 side.
一方、この電磁装置を遮断器等の開閉機器の投入用電磁
石として用いた場合、可動鉄心２が図示左側方向に移動
しギャップＸの中間位に達したときに、操作桿６を介し
て可動鉄心２に負荷が加わることになる。このとき、ギ
ャップＸが小さくなり、固定鉄心３側に作用する磁気吸
引力が最大負荷を充分に上回るために、可動鉄心２の動
作速度は負荷急増位置で極度に低下することなくスムー
ズな動作となる。On the other hand, when this electromagnetic device is used as a closing electromagnet for a switching device such as a circuit breaker, when the movable iron core 2 moves to the left side in the drawing and reaches the middle position of the gap X, the movable iron core 2 is moved through the operating rod 6. 2 will be loaded. At this time, the gap X becomes smaller, and the magnetic attraction force acting on the fixed iron core 3 side sufficiently exceeds the maximum load, so that the operating speed of the movable iron core 2 does not extremely decrease at the load sudden increase position, and smooth operation is achieved. Become.
したがって、このような構成によれば、固定鉄心３側の
磁気吸引力が最大負荷に達するまで補助固定鉄心４側の
磁気吸引力で保持させておくことにより、可動鉄心２を
最大負荷以上の磁気吸引力で動作させることが可能とな
る。また、規定値を越える一定の操作コイル電流によ
り、動作性能を補償することができる。これにより、第
３図破線で示すように、動作速度がフラットで操作電圧
の変動や負荷曲線に依存しない安定した特性を得ること
ができるため、一定速度の運動が必要とされる遮断器等
の投入特性が安定し機器の信頼性を向上することができ
るとともに、過大な機械的衝撃力を受けることがなく機
械的寿命を向上させることができる。Therefore, according to such a configuration, the movable iron core 2 is retained by the magnetic attraction force of the auxiliary fixed iron core 4 side until the magnetic attraction force of the fixed iron core 3 side reaches the maximum load, so that the movable iron core 2 is magnetized above the maximum load. It is possible to operate with suction force. Further, the operating performance can be compensated by the constant operating coil current exceeding the specified value. As a result, as shown by the broken line in FIG. 3, it is possible to obtain a stable characteristic that the operating speed is flat and does not depend on the fluctuation of the operating voltage and the load curve. The loading characteristics are stable and the reliability of the device can be improved, and the mechanical life can be improved without receiving an excessive mechanical impact force.
また、可動鉄心２の段部2bと相対向する励磁コイル１の
他方開口端に補助固定鉄心４を設けることにより、従来
のように負荷特性を変更したり、また可動鉄心の質量を
増やすなどの特別の対策が不要となるため、小形軽量化
を容易に図り得るととに価格的にも安価にできる。Further, by providing the auxiliary fixed iron core 4 at the other open end of the exciting coil 1 facing the stepped portion 2b of the movable iron core 2, the load characteristics can be changed as in the conventional case, and the mass of the movable iron core can be increased. Since no special measures are required, the size and weight can be easily reduced and the price can be reduced.
なお、本考案は上記実施例に限定されるものではなく、
要旨を変更しない範囲において種々変形して実施するこ
とができる。The present invention is not limited to the above embodiment,
Various modifications can be implemented without changing the gist.
H.考案の効果 以上に述べたように本考案によれば、最大負荷を上回る
磁気吸引力が発生する一定の操作コイル電流により可動
鉄心の動作性能を補償することが可能となり、操作電圧
や負荷曲線に依存しない安定した動作力が得られる。ま
た、可動鉄心の動作速度をほぼ一定にすることができる
ので、可動鉄心の衝撃力を良好に緩和することができ
る。H. Effect of the Invention As described above, according to the present invention, it becomes possible to compensate the operating performance of the movable iron core by the constant operation coil current that generates the magnetic attraction force exceeding the maximum load, and thus the operation voltage and load. A stable motion force independent of the curve can be obtained. Moreover, since the operating speed of the movable core can be made substantially constant, the impact force of the movable core can be moderated favorably.
第１図は本考案の一実施例を示す概略的構成図、第２図
は従来の電磁装置を示す概略的構成図、第３図は本考案
および従来の電磁装置を説明するための特性図である。 １……励磁コイル、２……可動鉄心、2a……基部、2b…
…段部、2c……小径部、2d……基部端面、３……固定鉄
心、４……補助固定鉄心、５……磁気ヨーク、5a,5b…
…延出部、６……操作桿。FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing a conventional electromagnetic device, and FIG. 3 is a characteristic diagram for explaining the present invention and a conventional electromagnetic device. Is. 1 ... Excitation coil, 2 ... Movable iron core, 2a ... Base, 2b ...
… Step, 2c …… Small diameter part, 2d …… Base end face, 3 …… Fixed iron core, 4 …… Auxiliary fixed iron core, 5 …… Magnetic yoke, 5a, 5b…
… Extension part, 6 …… Operation stick.
Claims (1)
方開口端に設けられた固定鉄心と、この固定鉄心に一方
端が接離されるように上記励磁コイルの中空部に可動自
在に設けられ他方端部に小径部を形成した可動鉄心と、
上記励磁コイルの他方開口端に設けられ上記可動鉄心の
小径部が挿通されその段部が接離される補助固定鉄心
と、上記励磁コイルを囲むように設けられた磁気ヨーク
とを具備したことを特徴とする電磁装置。1. A tubular exciting coil, a fixed iron core provided at one open end of the exciting coil, and a movable core provided in the hollow portion of the exciting coil so that one end thereof is brought into contact with and separated from the fixed iron core. And a movable iron core with a small diameter portion formed on the other end,
An auxiliary fixed iron core provided at the other open end of the exciting coil, through which a small diameter portion of the movable iron core is inserted, and a step portion thereof is brought into contact with and separated from the exciting coil, and a magnetic yoke provided so as to surround the exciting coil. And electromagnetic devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12243289U JPH075611Y2 (en) | 1989-10-19 | 1989-10-19 | Electromagnetic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12243289U JPH075611Y2 (en) | 1989-10-19 | 1989-10-19 | Electromagnetic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0361311U JPH0361311U (en) | 1991-06-17 |
| JPH075611Y2 true JPH075611Y2 (en) | 1995-02-08 |
Family
ID=31670432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12243289U Expired - Lifetime JPH075611Y2 (en) | 1989-10-19 | 1989-10-19 | Electromagnetic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075611Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017154720A1 (en) * | 2016-03-11 | 2017-09-14 | 三菱電機株式会社 | Electromagnetic actuator and switch device |
-
1989
- 1989-10-19 JP JP12243289U patent/JPH075611Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0361311U (en) | 1991-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2907900B2 (en) | Magnetic trip device | |
| US4306207A (en) | Self-sustaining solenoid | |
| US3419739A (en) | Electromechanical actuator | |
| US6870454B1 (en) | Linear switch actuator | |
| US2436354A (en) | Electromagnet with armature | |
| CA2304184A1 (en) | Electromagnetic actuator | |
| EP0198085A1 (en) | Electromagnetic actuator | |
| EP0871192A2 (en) | Magnetic actuator | |
| US7078833B2 (en) | Force motor with increased proportional stroke | |
| US4940958A (en) | Polarized electromagnetic apparatus | |
| US7482902B2 (en) | Linear magnetic drive | |
| US4409576A (en) | Method and apparatus which change magnetic forces of a linear motor | |
| JPH075611Y2 (en) | Electromagnetic device | |
| US4236130A (en) | Solenoid actuator having a long stroke | |
| JP2613904B2 (en) | Polarized electromagnet | |
| JPH073609Y2 (en) | Electromagnetic device | |
| JPS595941Y2 (en) | solenoid electromagnet | |
| KR100262659B1 (en) | Circuit breaker | |
| CN214505174U (en) | Quick-response large-stroke electromagnet | |
| JPH0117797Y2 (en) | ||
| JPS6346967B2 (en) | ||
| JPS5811087B2 (en) | Denjisha Yakuuchi | |
| JPS5932086Y2 (en) | polarized electromagnetic solenoid | |
| JPH01315920A (en) | Electromagnet with single stable pole | |
| JPS5922695Y2 (en) | Polar relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |