WO2011033654A1 - Releasing type electromagnet device - Google Patents
Releasing type electromagnet device Download PDFInfo
- Publication number
- WO2011033654A1 WO2011033654A1 PCT/JP2009/066387 JP2009066387W WO2011033654A1 WO 2011033654 A1 WO2011033654 A1 WO 2011033654A1 JP 2009066387 W JP2009066387 W JP 2009066387W WO 2011033654 A1 WO2011033654 A1 WO 2011033654A1
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- WIPO (PCT)
- Prior art keywords
- plunger
- release
- yoke
- iron core
- fixed iron
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
Definitions
- the present invention relates to a release type electromagnet device used as a tripping device for a circuit breaker, for example.
- the release-type electromagnet device is composed of a plunger, a yoke, a permanent magnet, a release coil, a release spring, and the like. Is. During tripping operation, if the trip current is applied to the release coil with a polarity that weakens the magnetic force of the permanent magnet, and the attractive force is smaller than the biasing force of the release spring, the plunger is separated from the U-shaped yoke by the force of the release spring. The circuit breaker is tripped.
- the release type electromagnet device used for the circuit breaker is a key part for sending a trip command to the circuit breaker.
- the conventional release type electromagnet device for example, as shown in Patent Document 1, It is known that there is no fixed iron core, and the plunger is disposed so as to penetrate the release coil and / or the ring-shaped permanent magnet and be directly attracted to a U-shaped yoke or pole piece disposed at the end of the coil.
- Patent Document 1 since the plunger slides in a bobbin formed of a molding resin having a limit in machining accuracy, the end yoke through hole is formed by inclining the plunger by looseness in the bobbin. There has been a problem that the operating characteristics are deteriorated due to the generation of sliding frictional force and magnetic attraction force generated between the plunger and the end yoke due to the contact.
- a solenoid type electromagnet that moves a spool of a hydraulic valve is known as shown in Patent Document 2.
- a pipe made of a cylindrical non-magnetic material is provided around the fixed iron core and the movable iron core, and the movable iron core is slid within the pipe.
- the sliding friction force is reduced because the movable iron core (plunger) slides inside the metal pipe, but when using bobbins with the same hollow diameter, the fixed iron core is inserted by the pipe thickness by inserting the pipe.
- the diameter of the movable iron core has to be reduced, and the magnetic resistance increases accordingly, and the operation efficiency decreases.
- the tripping current is applied to the release coil with a polarity that attracts the plunger to the fixed iron core only with the holding force of the permanent magnet and weakens the magnetic force of the permanent magnet during the tripping operation. Therefore, tripping operation of a circuit breaker with high operating efficiency can be realized.
- it is necessary to set the adsorption force in a steady state so that it does not easily malfunction due to vibration impact such as dropping. In other words, in order to be able to maintain the suction state without releasing even a large impact, it is necessary to secure an extra load margin for the plunger suction force with respect to the release spring force which is the release direction of the suction force.
- This load margin depends on the product specifications that require a force 50 to 100 times that of the plunger's own weight (for example, malfunction does not occur even when the vibration resistance is 50 to 100G) and the required value that comes from operational reliability. Accordingly, the release operation current value greatly depends on the load margin, and it goes without saying that, for example, reducing the plunger weight as much as possible leads to the reduction of the load margin and the improvement of the operation efficiency.
- the present invention has been made in view of the technical problems of the above-described conventional apparatus, and realizes a shortened and lighter plunger without reducing the plunger diameter, and the sliding frictional force of the plunger without increasing the magnetic resistance. It is an object of the present invention to obtain a release-type electromagnet device for a circuit breaker that reduces load margin, reduces operating load, has high operating efficiency, and has stable release characteristics.
- a release type electromagnet device includes a bobbin around which a release coil is wound, a fixed iron core and a plunger that are inserted into the inner peripheral portion of the bobbin and arranged to face each other, the bobbin, the fixed iron core, and a U that houses the plunger.
- the plunger is held at the attracting position against the release spring provided on the end yoke by the magnet, and a demagnetizing field is applied to the permanent magnet by the flow of the release current to the release coil to release the plunger.
- the plunger includes a large-diameter portion disposed opposite to the fixed iron core, and one end projecting outward from the large-diameter portion.
- a non-magnetic material between the inner peripheral wall of the bobbin and the large-diameter portion of the plunger.
- a cylindrical pipe made of is inserted, and is configured to be sandwiched between opposed end surfaces of the end yoke and the fixed iron core.
- a release-type electromagnet device having a relatively simple structure, further improving the operation efficiency as compared with the conventional one, and having a stable release characteristic.
- FIG. 1 is a cross-sectional view showing a release electromagnet device according to Embodiment 1 of the present invention.
- the release type electromagnet apparatus 1 has a release coil 3 wound around a hollow bobbin 2 and is housed in a U-shaped yoke 4.
- An end yoke 5 is combined with the opening of the U-shaped yoke 4 and is fixed to the U-shaped yoke 4 by a method such as caulking.
- a permanent magnet 7 magnetized in the thickness direction for attracting and holding the plunger 6 and a fixed plate 8 for positioning the permanent magnet 7 are disposed at the bottom of the U-shaped yoke 4.
- a transfer yoke 9 is provided on the permanent magnet 7, and a fixed iron core 11 is placed on the transfer yoke 9 while being inserted into the bobbin 2.
- the transfer yoke 9 has an attractive force so that a part of the magnetic flux flowing from the release coil 3 through the plunger 6, the end yoke 5, the U-shaped yoke 4, the permanent magnet 7, and the fixed iron core 11 bypasses the permanent magnet 7. Fine-tuning and well-known.
- the plunger 6 configured to be able to protrude onto the end yoke 5 is composed of a large-diameter portion 6a disposed so as to face the fixed iron core 11, and a small-diameter portion 6b projecting to the outside continuously. .
- the end yoke 5 is provided with a flange portion 5b having a through hole 5a for inserting the plunger 6.
- a plate 13 holding a release spring 10 that urges the plunger 6 in the protruding direction (A direction) is fixed to the outer end portion of the plunger 6 by a fixing ring 14, and between the plate 13 and the trapezoidal portion 6a of the plunger.
- a plate spring 15 is provided.
- a cylindrical pipe 12 made of a non-magnetic material is inserted between the hollow inner wall of the bobbin 2 and the large diameter portion 6 a of the plunger 6, and between the opposing surfaces of the end yoke 5 and the fixed iron core 11. It is pinched. That is, the fixed iron core 11 is sandwiched and fixed in a state of being pressed by the pipe 12 toward the transfer yoke 9.
- the operation of the release type electromagnet device of the present invention configured as described above will be described.
- the plunger 6 is pushed into the illustrated reset position by the reset operation of a circuit breaker (not shown) (in the direction opposite to the arrow A)
- the permanent magnet 7 is attracted and held at this position.
- the magnetic flux ⁇ m of the permanent magnet 7 returns from the N pole to the S pole via the transfer yoke 9, the fixed iron core 11, the plunger 6, the end yoke 5, and the U-shaped yoke 4 (path X).
- the spring force of the release spring 10 is Fs
- the plunger 6 is adsorbed by the force of Fm-Fs.
- the circuit breaker When the plunger 6 protrudes, the circuit breaker is tripped (not shown).
- An actuator (not shown) that opens the main body mechanism part pushes the plate 13 in the direction opposite to A, and attracts the plunger 6 to the fixed iron core 11, so that the release electromagnet apparatus 1 is reset as described above. Is done. Since the plate 13 can be moved in the direction of the central axis of the plunger 6 by the plate spring 15, the actuator is prevented from being pushed too much into the plate 13 and destroying the plate 13 during the resetting operation of the actuator.
- the length of the plunger can be shortened by sandwiching the pipe 12 between the fixed iron core 11 and the end yoke 5, and the release operation is performed without increasing the magnetic resistance. Can be made possible.
- the plunger is always placed in a metal pipe with high work accuracy and slides with a low sliding frictional force, so that play and manufacturing errors can be reduced, and the looseness and plunger of the fixed iron core 11 during release operation And the gap between the end yokes can be suppressed.
- the gap between the end yoke and the plunger may be set so as to be a value that is equal to or greater than the assembly error when the intersection of the plunger and the pipe is ⁇ 0.1 mm (a value defined by the integration intersection or the like).
- the attracting force Fm needs to be larger than the release spring force Fs which is the releasing direction.
- the plunger is shortened and reduced in weight and the plunger's own weight is reduced in the component configuration and operation principle described above, thereby reducing the load margin and improving the operation efficiency.
- the contact surface of the plunger 6 and the fixed iron core 11 may be arranged near the center of the coil where the density of the magnetic flux ⁇ generated by energizing the coil is the highest. Of course, it contributes to the improvement of operation efficiency.
- FIG. FIG. 2 is a sectional view showing a release electromagnet device according to Embodiment 2 of the present invention.
- the same reference numerals as those in FIG. 1 denote the same or corresponding parts. 2 differs from FIG. 1 in that
- a transfer yoke 9 is provided on the permanent magnet 7, and a fixed iron core 11 is placed on the transfer yoke 9 while being inserted into the bobbin 2, but in FIG. 2, the fixed iron core 11 is placed on the transfer yoke. 9 and integrated. Thereby, it is not necessary to prepare a transfer yoke separately, and the fixing core 11 can be fixed reliably and easily.
- FIG. 3 is a partially enlarged sectional view showing a release type electromagnet device according to Embodiment 3 of the present invention.
- the same reference numerals as those in FIG. 1 denote the same or corresponding parts. 3 differs from FIG. 1 in that the nonmagnetic pipe 12 is fitted between the opposing surfaces between the end yoke 5 and the fixed iron core 11 in FIG.
- a pipe fixing spacer 16 is inserted between the bobbin 2 and the bobbin 2, and the nonmagnetic pipe 12 is sandwiched between the pipe fixing spacer 16 and the fixed iron core 11.
- the pipe fixing spacer 16 is made of a nonmagnetic material, and is fitted and fixed to the bobbin 2 through a hole formed in a part thereof as shown in the figure. This facilitates molding of the end yoke 5 and leads to a reduction in manufacturing cost.
- 1 release electromagnet device 2 bobbin, 3 Release coil, 4 U-shaped yoke, 5 end yoke, 5a end yoke through hole, 6 Plunger part, 6a Large diameter part of the plunger, 6b Small diameter part of the plunger, 7 Permanent magnet, 8 fixed plate, 9 transfer yoke, 10 release spring, 11 fixed iron core, 12 non-magnetic pipes, 13 plates, 14 fixing ring, 15 plate spring, 16 Spacer for fixing pipes.
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- Electromagnetism (AREA)
- Electromagnets (AREA)
- Breakers (AREA)
Abstract
Description
以下、本発明の実施形態について、添付図面を参照しながら詳細に説明する。
図1はこの発明の実施の形態1における釈放形電磁石装置を示す断面図である。
図中、釈放形電磁石装置1は、中空状のボビン2に釈放コイル3が巻線され、U字形ヨーク4に収納されている。U字形ヨーク4の開口部には端部ヨーク5が組み合わされ、かしめ等の方法によりU字形ヨーク4に固定されている。U字形ヨーク4の底部にはプランジャ6を吸引保持する厚さ方向に磁化された永久磁石7、永久磁石7の位置決めを行う固定プレート8が配置されている。
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a cross-sectional view showing a release electromagnet device according to
In the drawing, the release
トランスファーヨーク9は釈放コイル3からプランジャ6、端部ヨーク5、U字形ヨーク4、永久磁石7、固定鉄心11を介して流れる磁束の一部が永久磁石7をバイパスするようにしてその吸着力を微調整するもので周知ものである。 A
The
先ず、回路遮断器(図示せず)のリセット操作でプランジャ6を図示のリセット位置に押し込む(矢印Aと反対方向)と、永久磁石7の磁力Fmによりこの位置に吸引保持される。この状態では永久磁石7の磁束φmはN極からトランスファーヨーク9、固定鉄心11、プランジャ6、端部ヨーク5、U字形ヨーク4を経由してS極に戻る(経路X)。釈放バネ10のバネ力をFsとすると、プランジャ6はFm-Fsの力で吸着されている。 Next, the operation of the release type electromagnet device of the present invention configured as described above will be described.
First, when the
このように設定することにより、ガタツキによって発生するプランジャの固定鉄心への吸着姿勢の傾斜やずれによる吸着力および摺動摩擦力のばらつきや、プランジャと端部ヨーク間が一部の箇所で密着して磁気的な吸着力に起因する摩擦力の増加も抑制することができ、これによって生じる動作効率の低減を抑制して安定した釈放動作特性を確保することが可能になる。 The general intersection of the JIS standard is defined as ± 0.1 mm for members of 6 mm or less. Therefore, the gap between the end yoke and the plunger may be set so as to be a value that is equal to or greater than the assembly error when the intersection of the plunger and the pipe is ± 0.1 mm (a value defined by the integration intersection or the like).
By setting in this way, variations in adsorption force and sliding frictional force due to inclination and deviation of the adsorption posture of the plunger to the fixed iron core caused by rattling, and the plunger and the end yoke are in close contact with each other in some places. It is also possible to suppress an increase in frictional force due to magnetic attraction force, and to suppress a reduction in operation efficiency caused thereby, and to secure stable release operation characteristics.
図2はこの発明の実施の形態2における釈放形電磁石装置を示す断面図である。図中、図1と同一符号は同一又は相当部分を示している。図2において、図1と異なる部分は、
図1では永久磁石7の上にトランスファーヨーク9が設けられ、トランスファーヨーク9上にはボビン2に挿入された状態で固定鉄心11が載置されているが、図2では固定鉄心11がトランスファーヨーク9と一体化したものである。これにより、トランスファーヨークを別途準備する必要がなく、しかも固定鉄心11の固定が確実且つ容易となるものである。
FIG. 2 is a sectional view showing a release electromagnet device according to
In FIG. 1, a
図3はこの発明の実施の形態3における釈放形電磁石装置を示す一部拡大断面図である。図中、図1と同一符号は同一又は相当部分を示している。図3において、図1と異なる部分は、図1では非磁性パイプ12が端部ヨーク5と固定鉄心11との間の対向面間に嵌め込む構造となっているが、図3では端部ヨーク5とボビン2との間にパイプ固定用スペーサ16を介挿し、これと固定鉄心11との間に非磁性パイプ12を挟持する構造となっている。パイプ固定用スペーサ16は非磁性材料で構成され、図のようにその一部に形成された孔を介してボビン2と嵌め合い固定されている。これにより端部ヨーク5の成型が容易になり製作コストの低減につながる。
FIG. 3 is a partially enlarged sectional view showing a release type electromagnet device according to
3 釈放コイル、 4 U字形ヨーク、
5 端部ヨーク、 5a 端部ヨーク貫通穴、
6 プランジャ部、 6a プランジャの大径部、
6b プランジャの小径部、 7 永久磁石、
8 固定プレート、 9 トランスファーヨーク、
10 釈放バネ、 11 固定鉄心、
12 非磁性パイプ、 13 プレート、
14 固定リング、 15 プレートバネ、
16 パイプ固定用スペーサ。 1 release electromagnet device, 2 bobbin,
3 Release coil, 4 U-shaped yoke,
5 end yoke, 5a end yoke through hole,
6 Plunger part, 6a Large diameter part of the plunger,
6b Small diameter part of the plunger, 7 Permanent magnet,
8 fixed plate, 9 transfer yoke,
10 release spring, 11 fixed iron core,
12 non-magnetic pipes, 13 plates,
14 fixing ring, 15 plate spring,
16 Spacer for fixing pipes.
Claims (6)
- 釈放コイルが巻回されたボビンと、上記ボビンの内周部に挿入され互いに対向配置された固定鉄心とプランジャ、上記ボビン、固定鉄心、プランジャを収納するU字形ヨークと、上記U字形ヨークの開口部に上記プランジャの上端部が外部に突出可能に固定された端部ヨークと、上記U字形ヨークの底部に取り付けられた永久磁石を備え、常時は上記永久磁石により上記端部ヨークに設けられた釈放バネに抗してプランジャを吸引位置に保持しておき、上記釈放コイルへの釈放電流の通流により上記永久磁石に反磁界を与えて上記プランジャの釈放動作を行わせるようにした釈放形電磁石装置において、上記プランジャは上記固定鉄心と対向配置された大径部と、これと連続して一端が外部側へ突出している小径部とから構成され、上記プランジャと固定鉄心の吸着面は、実質的に上記釈放コイルの中央部に位置し、上記ボビンの内周壁とプランジャの大径部との間に、非磁性材からなる筒状のパイプを挿入し、これが上記端部ヨークと固定鉄心との対向端面間で挟持されるように構成したことを特徴とする釈放形電磁石装置。 A bobbin around which a release coil is wound, a fixed iron core and a plunger that are inserted into the inner peripheral portion of the bobbin and arranged to face each other, a U-shaped yoke that houses the bobbin, the fixed iron core, the plunger, and an opening of the U-shaped yoke The upper end of the plunger is fixed to the part so that the upper end of the plunger can be protruded to the outside, and a permanent magnet attached to the bottom of the U-shaped yoke, and is always provided on the end yoke by the permanent magnet. A release-type electromagnet which holds the plunger against the release spring in the suction position and applies a demagnetizing field to the permanent magnet by the flow of the release current to the release coil to cause the plunger to release. In the apparatus, the plunger is composed of a large-diameter portion arranged to face the fixed iron core, and a small-diameter portion having one end projecting to the outside continuously. The adsorption surface of the jaw and the fixed iron core is substantially located at the center of the release coil, and a cylindrical pipe made of a non-magnetic material is inserted between the inner peripheral wall of the bobbin and the large diameter portion of the plunger. A release-type electromagnet device characterized in that this is sandwiched between opposing end surfaces of the end yoke and the fixed iron core.
- 上記端部ヨークとボビンとの間にパイプ固定用スペーサを介挿し、これと固定鉄心との間において上記パイプが挟持されるように構成したことを特徴とする請求項1に記載の釈放形電磁石装置。 2. The release electromagnet according to claim 1, wherein a pipe fixing spacer is interposed between the end yoke and the bobbin, and the pipe is sandwiched between the end yoke and the bobbin. apparatus.
- 固定鉄心とプランジャとの吸着面が実質的に釈放コイルの中央部に位置するようにしたことを特徴とする請求項1あるいは2に記載の釈放形電磁石装置。 3. The release type electromagnet device according to claim 1, wherein the attracting surface between the fixed iron core and the plunger is substantially located at the center of the release coil.
- U字形ヨークの底部にはプランジャを吸引保持する厚さ方向に磁化された永久磁石が固定され、上記永久磁石の上には、トランスファーヨークが設けられ、トランスファーヨーク上には上記固定鉄心がボビンに挿入された状態で載置されていることを特徴とする請求項3に記載の釈放形電磁石装置。 A permanent magnet magnetized in the thickness direction for attracting and holding the plunger is fixed to the bottom of the U-shaped yoke. A transfer yoke is provided on the permanent magnet, and the fixed iron core is mounted on the bobbin on the transfer yoke. 4. The release type electromagnet device according to claim 3, wherein the release type electromagnet device is placed in an inserted state.
- 固定鉄心とトランスファーヨークとは一体化成形されることを特徴とする請求項4に記載の釈放形電磁石装置。 The release-type electromagnet device according to claim 4, wherein the fixed iron core and the transfer yoke are integrally formed.
- プランジャと端部ヨーク間の空隙は、プランジャとパイプの交差の組立誤差以上の値となるように設定することを特徴とする請求項1に記載の釈放形電磁石装置。 2. The release type electromagnet device according to claim 1, wherein the gap between the plunger and the end yoke is set to be a value equal to or larger than an assembly error at the intersection of the plunger and the pipe.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2009/066387 WO2011033654A1 (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
CN2009801601050A CN102473561A (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
JP2011531727A JP5124048B2 (en) | 2009-09-18 | 2009-09-18 | Release-type electromagnet device |
DE112009005252T DE112009005252T5 (en) | 2009-09-18 | 2009-09-18 | ELECTROMAGNETIC RELEASE DEVICE |
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PCT/JP2009/066387 WO2011033654A1 (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
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WO2011033654A1 true WO2011033654A1 (en) | 2011-03-24 |
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PCT/JP2009/066387 WO2011033654A1 (en) | 2009-09-18 | 2009-09-18 | Releasing type electromagnet device |
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CN (1) | CN102473561A (en) |
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Cited By (3)
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CN102568741A (en) * | 2011-12-30 | 2012-07-11 | 成都威特电喷有限责任公司 | Quick electromagnet with armature ram |
EP3128523A4 (en) * | 2014-04-03 | 2018-01-31 | Mitsubishi Electric Corporation | Release-type electromagnet device and production method therefor |
WO2022201373A1 (en) * | 2021-03-24 | 2022-09-29 | 三菱電機株式会社 | Electromagnetic actuator |
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CN103337424B (en) * | 2013-06-19 | 2016-01-20 | 邳州市国龙电器有限公司 | A kind of permanent magnet releaser |
CN104347225A (en) * | 2013-08-05 | 2015-02-11 | 宝鸡烽火工模具技术有限公司 | Electromagnet capable of preventing permanent attraction and clamping stagnation |
CN106971812B (en) * | 2017-04-12 | 2019-07-16 | 宁波兴茂电子科技有限公司 | A kind of super-silent electromagnet |
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2009
- 2009-09-18 CN CN2009801601050A patent/CN102473561A/en active Pending
- 2009-09-18 JP JP2011531727A patent/JP5124048B2/en not_active Expired - Fee Related
- 2009-09-18 DE DE112009005252T patent/DE112009005252T5/en not_active Withdrawn
- 2009-09-18 WO PCT/JP2009/066387 patent/WO2011033654A1/en active Application Filing
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JPH01262604A (en) * | 1988-04-14 | 1989-10-19 | Matsushita Electric Ind Co Ltd | Electromagnetic actuator |
JPH08185788A (en) * | 1994-12-27 | 1996-07-16 | Mitsubishi Electric Corp | Circuit breaker with under-voltage trip device |
JP2005166429A (en) * | 2003-12-02 | 2005-06-23 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic solenoid |
JP2007258150A (en) * | 2006-02-27 | 2007-10-04 | Fuji Electric Fa Components & Systems Co Ltd | Release type electromagnetic device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102568741A (en) * | 2011-12-30 | 2012-07-11 | 成都威特电喷有限责任公司 | Quick electromagnet with armature ram |
EP3128523A4 (en) * | 2014-04-03 | 2018-01-31 | Mitsubishi Electric Corporation | Release-type electromagnet device and production method therefor |
WO2022201373A1 (en) * | 2021-03-24 | 2022-09-29 | 三菱電機株式会社 | Electromagnetic actuator |
JP7435899B2 (en) | 2021-03-24 | 2024-02-21 | 三菱電機株式会社 | electromagnetic actuator |
Also Published As
Publication number | Publication date |
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CN102473561A (en) | 2012-05-23 |
JP5124048B2 (en) | 2013-01-23 |
JPWO2011033654A1 (en) | 2013-02-07 |
DE112009005252T5 (en) | 2013-01-03 |
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