Polarized Electromagnet Patents (Class 335/230)
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Patent number: 11691513Abstract: The invention relates to an operating unit for a vehicle, provided with an operating element (12) having an operating interface (14) with multiple symbol fields (16), to which are assigned operating functions that can be triggered with the actuation of the operating element (12). The operating element (12) is arranged on a support structure (18) such that it can be pressed down in a resettable manner and by means of an actuation object, in particular by means of the finger of a hand.Type: GrantFiled: May 11, 2020Date of Patent: July 4, 2023Assignee: BEHR-HELLA THERMOCONTROL GMBHInventors: Matthias Stallein, Winfried Fust, Bastian Bandlow
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Patent number: 11527946Abstract: A haptic engine includes a haptic actuator having a double-wound driving coil in which the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in which the two windings are connected with each other in series, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding, and without having to sense a driving current through the double-wound driving coil. By using the double-wound driving coil in which the two windings are connected with each other in parallel, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.Type: GrantFiled: June 12, 2020Date of Patent: December 13, 2022Assignee: Apple Inc.Inventors: Riccardo Tarelli, Yumeng Liu, Shingo Yoneoka
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Patent number: 11515112Abstract: An electromagnetic relay includes an electromagnet unit, an armature supported so as to be pivotable relative to a yoke by a hinge spring, a contact including a first contact and a second contact, which can switch, in accordance with pivoting of the armature, between a closed contact state and an open contact state, an elastic member which elastically deforms in accordance with pivoting of the armature, and applies a contact force between the first contact and the second contact in the closed contact state, and a magnet which generates an attractive force for retaining the armature in an open contact position corresponding to the open contact state, wherein the armature is retained in the open contact position by a resultant force of a restoring force applied to the armature by the hinge springe, and the attractive force of the magnet.Type: GrantFiled: May 17, 2019Date of Patent: November 29, 2022Assignee: FUJITSU COMPONENT LIMITEDInventor: Daiei Iwamoto
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Patent number: 11398332Abstract: To obtain an electromagnetic actuator capable of improving a thrust force of a movable element. Provided is an electromagnetic actuator, including: a stator, which has a first surface at one end in an axial direction and a second surface at another end in the axial direction, and is made of a soft magnetic material having a tubular space formed in the axial direction; and a movable element, which is disposed in the tubular space, and is configured to move along the axial direction, wherein the stator includes: a coil; a core portion; and a protrusion portion, wherein the movable element includes a movable element core made of a soft magnetic material and a permanent magnet, and wherein at least one of a radially inner side and a radially outer side of the permanent magnet is covered by a movable element core.Type: GrantFiled: January 2, 2020Date of Patent: July 26, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shoji Ishikawa, Toru Ogawa, Kazumasa Ito, Ryuichi Takiguchi
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Patent number: 11322782Abstract: A control module is arranged side by side with a battery module. The control module includes a bus bar by which the battery module and an electric load are electrically connected to each other; a switch by which an electrical connection between the bus bar and the electric load is switched on and off; a current sensor by which a current of the bus bar is detected; and a shielding part. The current sensor detects current passing through the bus par by converting, to an electrical signal, a magnetic field generated by the current passing though the bus bar. The switch generates a magnetic field to switch over connections between the bus bar and the electric load based on the generated magnetic field. The shielding part is arranged between the current sensor and the switch.Type: GrantFiled: May 8, 2018Date of Patent: May 3, 2022Assignee: DENSO CORPORATIONInventor: Yoshimitsu Inoue
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Patent number: 11296392Abstract: A magnetic structure for an electromagnetic resonator is provided. The magnetic structure comprises at least a solenoid and a permanent magnet, wherein the solenoid and the permanent magnet are concentrically arranged to each other such that the magnetic field lines provided by the permanent magnet are at least essentially perpendicular to magnetic field lines of a magnetic field generated by the solenoid. The arrangement of the permanent magnet and the solenoid may be housed by an element with a high magnetic permeability.Type: GrantFiled: September 17, 2020Date of Patent: April 5, 2022Assignee: ROHDE & SCHWARZ GMBH & CO. KGInventor: Florian Huber
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Patent number: 10529522Abstract: A circuit breaker includes a current entry which conducts an electrical current via a wound coil conductor strip of a first coil to a first fixed contact, and includes a contact rocker which can be moved between two switching positions. The contact rocker includes mutually connected contact limbs. A first switching position of the contact rocker, electrically connects the first fixed contact with a second fixed contact which is connected via a wound coil conductor strip of a second coil to a current exit for dissipating an electrical current flowing through the contact limbs of the contact rocker and the coil conductor strips of the coils to a current exit of the circuit breaker.Type: GrantFiled: June 1, 2016Date of Patent: January 7, 2020Assignee: WÖHNER GMBH & CO. KG ELEKTROTECHNISCHE SYSTEMEInventors: Philipp Steinberger, Hubert Lenker
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Patent number: 10431407Abstract: Systems, methods, techniques and apparatuses of contactors are disclosed. One exemplary embodiment is a contactor including an electric pole, a pair of plungers, and a pair of opening springs. The electric pole includes a fixed yoke member and a movable yoke member arranged respectively at a proximal position and a distal position with respect to a movable contact. The fixed yoke member includes a pair of through holes. The pair of second plungers are inserted in a corresponding through hole passing through the fixed yoke member and symmetrically positioned with respect to a main symmetry plane of the contactor, which is parallel to a displacement axis of the movable contact and perpendicular to a displacement plane of the movable contact. The pair of opening springs are symmetrically positioned with respect to the main symmetry plane.Type: GrantFiled: June 13, 2017Date of Patent: October 1, 2019Assignee: ABB Schweiz AGInventors: Andrea Delpozzo, Emanuele Morelli, Osvaldo Prestini, Veronica Biagini, Christian Simonidis
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Patent number: 10404150Abstract: An energy harvesting device includes a core portion, a first magnet, and a second magnet. The core portion has an electrical output and can move from a first disposition to a second disposition. The first magnet is disposed to provide first magnetic field lines therethrough in a first direction. The second magnet is disposed to provide second magnetic field lines therethrough in a second direction. The core portion, the first magnet and the second magnet are arranged such that externally applied vibrations in a third direction normal to the first direction cause the core portion to oscillate between the first disposition and the second disposition.Type: GrantFiled: January 12, 2017Date of Patent: September 3, 2019Assignee: United States of America as represented by the Secretary of the NavyInventors: Paul D. Swanson, Brian B. Dick, Maxwell Kerber, Alex G. Phipps
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Patent number: 10217554Abstract: A bistable electromagnetic actuator device, a permanent magnet means (12; 12a, 12b), as well as an armature unit (18) with an elongate plunger unit (10) extending along a moving direction, wherein said armature unit can be moved into at least one of two end and/or stop positions that are stable in the deenergized state by means of stationary electromagnetic driving means (22), wherein stationary magnetic field detector means (34; 34a, 34b) are assigned to a housing (20), which at least sectionally encloses the armature unit, for the contactless interaction with the permanent magnet means in at least one of the end or stop positions provided for the armature position detection, wherein the plunger unit features a terminal contact and/or engagement section (28) for interacting with an actuating partner in a contacting and non-positive fashion such that a non-positive contact and/or actuation by the actuating partner causes a motion of the armature unit into one of the end or stop positions, in which the armaturType: GrantFiled: September 17, 2015Date of Patent: February 26, 2019Assignee: ETO Magnetic GmbHInventors: Oliver Thode, Joerg Buerssner
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Patent number: 10199192Abstract: An improved bi-stable electrical solenoid switch comprising a solenoid being wound with coil windings. The solenoid having a central aperture defined therein, and the coil windings, which when engaged by a power source, generates a magnetic field. A magnetic coupling member mounted on the solenoid. A plunger partially disposed in the central aperture for movement into and out of the central aperture. A conductive plate coupled to the plunger and provided with contacts on each end of the conductive plate. The conductive plate configured to electrically engage and disengage the solenoid upon respective application of power to the solenoid. The magnetic coupling member configured to reduce the force needed by the solenoid to remain in an open position when selectively energized for moving and retaining the conductive plate of the plunger against the solenoid for allowing wide operating voltage and reduced operating power.Type: GrantFiled: December 30, 2014Date of Patent: February 5, 2019Assignee: LITTLEFUSE, INC.Inventors: Chad Beauregard, Justin Kaufman, Brent Glad
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Patent number: 9966215Abstract: The disclosure relates to a permanent magnet actuator comprising: a stator iron core having a space therein-side, and having a first wall and a second wall opposing the first wall; a movable element moving reciprocally between the first wall and the second wall, along a moving axis which connects the first wall and the second wall inside the space; a first magnetomotive force supplying body and a second magnetomotive force supplying body disposed respectively on the first wall and the second wall, so as to supply a magnetomotive force to the movable element for the reciprocal movement thereof, wherein, at least one of the first magnetomotive force supplying body and the second magnetomotive force supplying body selectively produces a bidirectional magnetomotive force; a permanent magnet disposed between the first magnetomotive force supplying body and the second magnetomotive force supplying body, and providing a coercive force to the movable element for maintaining the state thereof; and a driving circuit coType: GrantFiled: May 24, 2013Date of Patent: May 8, 2018Assignee: Entec Electric and Electronic Co., Ltd.Inventors: Young Bong Bang, Chang Hyuk Lee, Ji Won Choi, Young Il Kim, Heung Ryeol Koh, Myeong Seob Choi
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Patent number: 9934924Abstract: A bistable relay and a bistable actuator are provided. The bistable actuator includes a magnetic latching mechanism and an electromagnet. The magnetic latching mechanism includes a rotation shaft, a pillar-shaped permanent magnet, a columnar hollow magnetic conductor and two shells, and operates between a first and second stable states. The columnar hollow magnetic conductor surrounds the pillar-shaped permanent magnet wrapping the rotation shaft, and maintains a gap with the pillar-shaped permanent magnet. The electromagnet is connected to the columnar hollow magnetic conductor for driving the pillar-shaped permanent magnet to rotate, so as to switch the magnetic latching mechanism to the stable state. During a process that the magnetic latching mechanism is switched to the stable state, the rotation shaft rotates synchronously along with the magnetic latching mechanism to drive an impact system to move relative to a contact system, so as to contact or disconnect the contact points.Type: GrantFiled: August 12, 2014Date of Patent: April 3, 2018Inventor: Chih-Chuan Liang
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Patent number: 9765738Abstract: A fuel injector includes a fuel valve with a valve seat and a movable valve needle, a calibration spring and an electromagnetic actuator with a solenoid and a movable armature. The calibration spring exerts a pressing force on the valve needle for pressing the valve needle in a closing direction towards the valve seat. When the solenoid is electrically energized, the electromagnetic actuator is operable to transfer a lifting force to the valve needle by engagement with the armature for lifting the valve needle from the valve seat to a fully open position against the pressing force of the calibration spring. The calibration spring and the electromagnetic actuator are configured such that the lifting force equals the pressing force in the fully open position.Type: GrantFiled: March 11, 2015Date of Patent: September 19, 2017Assignee: CONTINENTAL AUTOMOTIVE GMBHInventors: Ivano Izzo, Marco Mechi
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Patent number: 9761396Abstract: The present invention provides a magnet, which comprises a body having a first and a second section, and a slide arranged to be movable relative to the body between a first and a second position. The slide comprises a permanent magnet, and a first and a second pole piece that are attached to opposite magnetic pole surfaces of the permanent magnet. The first section comprises a hole that opens into a first cavity of the body, the bottom of the first cavity being delimited at least partly by the second section. The slide is movably arranged in the hole so that the second pole piece is directed towards the bottom of the first cavity, wherein at the first position of the slide, magnetic flux generated by the permanent magnet is short-circuited by the first section, and at the second position of the slide, magnetic flux generated by the permanent magnet is directed through the first and the second section.Type: GrantFiled: January 30, 2015Date of Patent: September 12, 2017Assignee: Ixtur OYInventor: Reijo Nätti
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Patent number: 9711269Abstract: A torque motor actuator includes a first magnetic pole piece, a second magnetic pole piece, an armature, and an armature stop. The second magnetic pole piece is spaced apart from the first magnetic pole piece to define an armature gap. The armature is disposed in the armature gap and is spaced apart from the first and second magnetic pole pieces. The armature includes a magnetically permeable material and has a central portion, a first arm, and a second arm. The armature is rotationally mounted at the central portion, and the first and second arms extend, in opposite directions, from the central portion. The armature stop extends from the first arm, and comprises a non-magnetic material. The armature stop is configured, upon rotation of the armature, to selectively engage one of the first or second magnetic pole pieces to thereby limit armature rotation.Type: GrantFiled: January 8, 2014Date of Patent: July 18, 2017Assignee: HONEYWELL INTERNATIONAL INC.Inventors: James Williams, Douglas Klontz, Dan Carter
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Patent number: 9677774Abstract: A convection oven is disclosed. The convection oven comprises a housing having an oven cavity and an oven door for access to the oven cavity, at least one air blower for generating heated air, one or more air channels for directing the heated air from the air blower toward the oven cavity, and one or more removable air plenums, wherein each removable air plenum is connected to one of the one or more air channels, comprises an air intake edge for receiving the heated air from the air channel, defines the top or the bottom of a cooking chamber within the oven cavity, and comprises a plurality of air vents for directing the heated air into the cooking chamber. The convection oven may further comprise a control panel for separately and independently controlling each of the cooking chambers defined by the removable air plenums.Type: GrantFiled: June 8, 2015Date of Patent: June 13, 2017Assignee: Alto-Shaam, Inc.Inventors: Philip R. McKee, Lee Thomas VanLanen, Todd Coleman
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Patent number: 9530552Abstract: A magnetic circuit switching device with single-sided attraction includes a housing with a first side and a second side individually arranged at either side, where the first side has an attraction surface to attract an iron core; a permanent magnet having a first type magnetic pole and a second type magnetic pole individually arranged at inner and outer side with opposite properties; a nonconductive axial tube for the iron core to engage, having an opening at the right side extending to the second side of the housing; and a spring providing elastic force for the iron core to displace. With a magnetic path alteration function and the elastic force from the spring, the structure is able to keep the iron core in a pre-determined position. Therefore the iron core has a wider stretching range for operation, increasing the possibilities of wider application and ensuring in-time adjusting in case of deviation and wear and tear of the device.Type: GrantFiled: November 27, 2015Date of Patent: December 27, 2016Inventors: Yu-Chiao Shen, Tung-Po Wu
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Patent number: 9472367Abstract: An electrical switching apparatus includes a ferromagnetic frame having first and opposite second portions, a ferromagnetic core disposed therebetween, a permanent magnet disposed on the first portion, a first tapered portion on the opposite second portion; a coil disposed about the core; and a ferromagnetic or magnetic armature including a first portion, an opposite second portion and a pivot portion pivotally disposed on the core between the portions of the armature. The armature opposite second portion has a complementary second tapered portion therein. In a first armature position, the armature first portion is magnetically attracted by the permanent magnet and the first and second tapered portions are moved apart with the coil de-energized. In a second armature position, the armature opposite second portion is magnetically attracted by the opposite second portion of the frame and the first tapered portion is moved into the second tapered portion with the coil energized.Type: GrantFiled: February 27, 2013Date of Patent: October 18, 2016Assignee: LABINAL, LLC.Inventors: Patrick W. Mills, James M. McCormick, Richard G. Benshoff, Robert J. Innes
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Patent number: 9418811Abstract: A relay includes a fixed contact point, a movable contact member and an electromagnetic device. The electromagnetic device includes a bobbin, a coil, a movable iron core, a first armature, a second armature, and a ferromagnetic member. The first armature has a first hole to which a first end portion of the movable iron core is insertion-fitted. The second armature has a second hole to which a second end portion of the movable iron core is insertion-fitted. The bobbin has a first rib formed on each of facing surfaces of a pair of first side pieces and a second rib formed on each of facing surfaces of a pair of second side pieces. The first armature is interposed between the first ribs of the pair of first side pieces and the second armature is interposed between the second ribs of the pair of second side pieces.Type: GrantFiled: July 10, 2015Date of Patent: August 16, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tomoaki Sasaki, Takafumi Imai
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Patent number: 9368304Abstract: A polarized relay comprising an electromagnet, a two-pole or three-pole permanent magnet, an armature, and switches, which are mounted in and on a shelf-like support component. The support component accommodates magnetic flux pieces and the permanent magnet in an upper cavity, and the permanent magnet is magnetized while the electromagnet is still outside the support component. Subsequently, the electromagnet is inserted into lower cavity of the support component and the rest of the components of the relay are mounted.Type: GrantFiled: March 27, 2013Date of Patent: June 14, 2016Assignee: Phoenix Contact GmbH & Co. KGInventors: Jens Heinrich, Christian Mueller, Ralf Hoffmann
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Patent number: 9275815Abstract: An electromechanical relay is provided, comprising a magnetic system and a pivotable armature. A diagnostic switch is arranged on one side of the relay, and the set of contacts of the diagnostic switch is driven by the adjacent leg of the armature. A load switch is arranged on the bottom side of the relay and is driven by the second leg of the armature via an insulating coupling member.Type: GrantFiled: March 27, 2013Date of Patent: March 1, 2016Assignee: Phoenix Contact GmbH & Co. KGInventors: Ralf Hoffmann, Jens Heinrich, Christian Mueller, Olaf Abel, Thomas Kuehne
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Patent number: 9153403Abstract: The present invention provides an electromagnet device including a horizontal portion of a yoke arranged near one end portion of an iron core, a movable iron piece which pivotably supported on a leading end edge portion of a vertical portion of the yoke which serves as a fulcrum, an end portion of the movable iron piece adapted to be attracted to a magnetic pole portion by a main magnetic circuit, the magnetic pole portion is arranged in the other end portion of the iron core. The main magnetic circuit is formed by applying a voltage to a coil wound around a periphery of the iron core and an auxiliary magnetic circuit formed in parallel with the main magnetic circuit, the auxiliary circuit including a permanent magnet is arranged near the one end portion of the iron core and a magnetic resistance portion, in which a magnetic flux of the permanent magnet is magnetically saturated.Type: GrantFiled: July 30, 2013Date of Patent: October 6, 2015Assignee: OMRON CorporationInventors: Toshifumi Sumino, Masaaki Yamamoto, Ichinori Sakai, Mitsuhiro Kawai, Shinichi Furusho
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Patent number: 9053885Abstract: Bistable high-performance miniature relay, comprising an insulating housing having a first housing chamber (1b) with a single-phase contact assembly (4) with two current bars (8a, 8b) and a contact spring (13). The contact spring (13) being permanently connected with one leg end a current bar (8a). In a second housing chamber (1a), a bistable magnetic actuator assembly (3) with a pivotable armature (11) is placed. The contact assembly (4) and the actuator assembly (3) are located in one or two planes in the insulation material housing, the contact assembly (4) is provided with a multiplate contact spring (13) bent U-shaped to a current loop, and the actuator assembly (3) is provided with a one-part U-shaped yoke (14) with an excitation coil (17) per yoke leg and a yoke central leg (16), borne by a flat permanent magnet, supporting a rocker armature (11) formed in a slightly V-shaped.Type: GrantFiled: April 11, 2011Date of Patent: June 9, 2015Assignee: Johnson Electric Dresden GMBHInventors: Jörg Gassmann, Steffen Schnitter, Marcus Herrmann, Matthias Kulke
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Patent number: 8912871Abstract: An electromagnetic actuator comprising a core moving between a latched position and an open position, a permanent magnet, a coil designed to generate a first magnetic control flux to move the core from an open position to a latched position, and a second magnetic control flux designed to facilitate movement of the moving core from the latched position to the open position. The permanent magnet is positioned on the moving core so as to be at least partly outside the fixed magnetic circuit in which the first magnetic control flux flows in the open position, and to be at least partly inside the fixed magnetic circuit used for flow of a magnetic polarization flux of the magnet in the latched position.Type: GrantFiled: November 15, 2010Date of Patent: December 16, 2014Assignee: Schneider Electric Industries SASInventors: Michel Lauraire, Jean Pierre Kersusan, Bernard Loiacono
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Patent number: 8786387Abstract: A magnetic actuator includes a coil bobbin that has electrical wire wound around a core. The magnetic actuator also includes a plunger located in a central portion of the magnetic actuator and configured to move within a bore located in the central portion, and at least one spring located adjacent the central portion. When electrical current is provided to the electrical wire, an electromagnetic field causes the plunger to move from a first position to a second position, and stored energy associated with the spring aids in moving the plunger to the second position. The magnetic actuator further includes a linking portion coupled to the plunger, wherein the linking portion is configured to initiate an action based on movement of the plunger.Type: GrantFiled: June 19, 2012Date of Patent: July 22, 2014Assignee: Thomas & Betts International, Inc.Inventors: Robert Fong, Geoffrey Reed
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Patent number: 8760248Abstract: The invention relates to an electromagnetic actuator to be mounted in a haptic-feedback control device (1) for transmitting a haptic feedback to a user, wherein said actuator (5a, 5b) comprises a fixed portion (9) and a mobile portion (11), said fixed (9) and mobile (11) portions forming a magnetic circuit defining at least one air gap (e) between said fixed (9) and mobile (11) portions. According to the invention, the actuator (5a, 5b) further comprises: at least two permanent magnets (23a, 23b) respectively generating first (B1) and second (B2) opposite magnetic fields; and an electric coil (25) provided between said magnets (23a, 23b) such that the winding of said coil (25) extends successively through said first (B1) and second (B2) opposite magnetic fields so that, when a current flows through said coil (25), the actuator (5a, 5b) is submitted to a resulting actuation force in a common driving direction for translating said mobile part (11) in said air gap (e).Type: GrantFiled: April 20, 2009Date of Patent: June 24, 2014Assignee: DAVInventor: Bruno Marie
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Patent number: 8729992Abstract: An electromagnetic actuator device has a core unit with a coil device designed to cooperate with armature units displaceably guided relative to the core unit in response to current applied to the coil device, wherein the core unit is designed to cooperate with a plurality of spatially separated plunger units of the armatures so that an electromagnetic interaction takes place with the plurality of plunger units in response to current applied to a coil of the coil device.Type: GrantFiled: November 25, 2009Date of Patent: May 20, 2014Assignee: ETO Magnetic GmbHInventors: Thomas Schiepp, Oliver Thode
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Patent number: 8729994Abstract: The invention refers to a Rotary Solenoid comprising a stator and rotor that can rotate around a rotational axis. The rotor has a rotor shaft on which a rotor disc is arranged. The rotor disc is, seen in the direction of the circumference, polarized alternating magnetically. The stator carries at least one coil. On the coil windings of electrically conducting wire are provided. For guiding the magnetic flow of the magnetic field generated by the coil a pole face consisting of several partial pole faces is provided.Type: GrantFiled: December 20, 2010Date of Patent: May 20, 2014Assignee: SVM Schultz Verwaltungs-GmbH & Co. KGInventors: Winfried Willburger, Daniel Kreuzer
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Patent number: 8704625Abstract: An electromagnetic energy transducer configured to convert mechanical energy into electrical energy comprises two magnetic elements including a permanent magnetic element and a soft-magnetic element and an electrical coil. The permanent magnetic element and the soft-magnetic element are arranged to form a magnetic circuit and one of the two magnetic elements is movable in relation to the other of the two magnetic elements. The electrical coil surrounds a part of the soft magnetic element. The movable magnetic element is held in a first position by a spring force and moved into a second position by applying an external mechanical force exceeding the spring force, and at the first position the magnetic flux within the soft magnetic element is different than the flux at the second position.Type: GrantFiled: July 23, 2012Date of Patent: April 22, 2014Assignee: EnOcean GmbHInventor: Frank Schmidt
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Patent number: 8692636Abstract: Exemplary embodiments are directed to a bistable magnetic actuator for a medium voltage circuit breaker arrangement, including at least one electrical coil for switching a ferromagnetic armature between a first limit position and a second limit position effected by an electromagnetic field, at least one permanent magnet for holding the armature in one of the two limit positions corresponding to an open and a closed electrical switching position respectively of the mechanically connected circuit breaker. The armature includes an upper plunger resting on a ferromagnetic core element of the one electrical coil for static holding the armature in the first limit position, which is attached to a plunger rod extending through the ferromagnetic core element and through the permanent magnet for mechanically coupling the actuator to the circuit breaker arrangement.Type: GrantFiled: April 16, 2012Date of Patent: April 8, 2014Assignee: ABB Technology AGInventor: Christian Reuber
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Publication number: 20140028420Abstract: A moving magnet actuator (MMA) includes a magnetically conductive end-ring that is spaced from a magnet pole piece. The end-ring is constructed and spaced to provide a desired counter or anti-cogging force when the MMA is in a powered state. The MMA is also constructed such that a central portion of its armature stroke is axially displaced from a radial centerline of the magnetically conductive conduit enclosing the MMA components.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: Woodward Governor CompanyInventor: Matthew J. Scanlon
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Patent number: 8497754Abstract: The electromagnetic actuator is a linear electromagnetic actuator in which the relative position between a slide table that supports permanent magnets thereon and a guide rail that supports a coil, which is arranged in confronting relation to the permanent magnets, is displaced by means of a thrust force generated by a current flowing through the coil. The coil is disposed on the guide rail through a low coercive force magnetizable material body, the coercive force of which is lower than a predetermined value. Consequently, generation of residual magnetization can be suppressed, and an influence on the thrust force caused by such residual magnetization can also be suppressed.Type: GrantFiled: February 21, 2013Date of Patent: July 30, 2013Assignee: SMC Kabushiki KaishaInventors: Nobuhiro Fujiwara, Hisashi Yajima
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Patent number: 8421564Abstract: The electromagnetic actuator is a linear electromagnetic actuator in which the relative position between a slide table that supports permanent magnets thereon and a guide rail that supports a coil, which is arranged in confronting relation to the permanent magnets, is displaced by means of a thrust force generated by a current flowing through the coil. The coil is disposed on the guide rail through a low coercive force magnetizable material body, the coercive force of which is lower than a predetermined value. Consequently, generation of residual magnetization can be suppressed, and an influence on the thrust force caused by such residual magnetization can also be suppressed.Type: GrantFiled: August 30, 2010Date of Patent: April 16, 2013Assignee: SMC Kabushiki KaishaInventors: Hisashi Yajima, Nobuhiro Fujiwara
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Patent number: 8355524Abstract: A magnetic circuit includes a cylindrical yoke member having an inner circumferential surface and a collar formed at one end thereof and turned back substantially at right angles, and a plurality of permanent magnet segments of a partially circular arc in cross section. Each of the permanent magnets has an outer surface attracted magnetically to the inner circumferential surface of the cylindrical yoke member, and one end face attracted magnetically to the collar of the cylindrical yoke member. The magnetic circuit is applied to an actuator or a speaker.Type: GrantFiled: June 11, 2010Date of Patent: January 15, 2013Assignee: TDK CorporationInventors: Shigeo Saitou, Mitsutoshi Tanaka, Kouji Mitake
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Patent number: 8339225Abstract: An electromagnetic actuating device (1) having a housing (2) and two actuator pins (3, 4) that are supported in the housing so as to be movable independently of each other between a retracted rest position and an extended working position, and locking pins (7, 8) that hold the actuator pins in the rest position via locking mechanisms and that can be moved relative to the actuator pins in the movement direction of the actuator pins. A force is applied to the locking pins in the extension direction by further spring elements (15), and the locking pins are moved in the retraction direction by electromagnetic force application in order to unlock the locking mechanisms. The actuating device is an electromagnet (22) associated with the locking pins in common and having a reversible direction of the magnetic field, and the end sections (19) of the locking pins facing away from the actuator pins are provided with bipolar permanent magnets (20, 21) that are oriented with opposite polarities in the movement direction.Type: GrantFiled: February 11, 2010Date of Patent: December 25, 2012Assignee: Schaeffler Technologies AG & Co. KGInventor: Andreas Nendel
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Patent number: 8237527Abstract: A permanent magnetic actuator includes a flux inducing unit having a hollow space therein and formed by laminating a plurality of plates, a movable element disposed in the hollow space of the flux inducing unit to be reciprocated, permanent magnets installed at inner walls of the hollow space, and guide members located between the permanent magnets and the movable element and configured to guide reciprocating motion of the movable element.Type: GrantFiled: May 25, 2011Date of Patent: August 7, 2012Assignee: LSIS Co., Ltd.Inventor: Young Gyu An
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Patent number: 8228149Abstract: An electromagnetic control mechanism (1) with an actuating element (15) which can move longitudinally and can be retained in three stable positions. By way of two coils (3, 4), the actuating element (15) can be switched to a first or to a second stable position, namely, the two opposed end positions. The actuating element (15) comprises an actuator rod (7) with a permanent magnet (8) arranged on the actuator rod (7), such that the actuating element (15) can be retained magnetically in the third stable position by the permanent magnet (8).Type: GrantFiled: February 11, 2009Date of Patent: July 24, 2012Assignee: ZF Friedrichshafen AGInventors: Thomas Puth, Reiner Keller, Michael Pantke
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Patent number: 8228151Abstract: An electromagnetic energy transducer configured to convert mechanical energy into electrical energy comprises two magnetic elements including a permanent magnetic element and a soft-magnetic element and an electrical coil. The permanent magnetic element and the soft-magnetic element are arranged to form a magnetic circuit and one of the two magnetic elements is movable in relation to the other of the two magnetic elements. The electrical coil surrounds a part of the soft magnetic element. The movable magnetic element is held in a first position by a spring force and moved into a second position by applying an external mechanical force exceeding the spring force, and at the first position the magnetic flux within the soft magnetic element is different than the flux at the second position.Type: GrantFiled: February 9, 2011Date of Patent: July 24, 2012Assignee: Enocean GmbHInventor: Frank Schmidt
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Patent number: 8212640Abstract: A magnetically driven tool includes a shaft having a bottom application end including a contacting surface, at least one support around a portion of the shaft for supporting components positioned outside the shaft that float with respect to the shaft. A first magnet is affixed to the shaft. An electromagnet secured to the support is positioned outside the shaft and floats with respect to the shaft above the first magnet. At least one bearing is provided for sliding the shaft in an axial direction and optionally rotating the shaft. For pushing operations, the direction of current through the electromagnet is applied so that like poles relative to the first magnet face one another to provide a repulsive force, while for pulling operations unlike poles face one another. The magnitude of the current sets a force applied by the contacting surface to a workpiece.Type: GrantFiled: July 26, 2011Date of Patent: July 3, 2012Inventor: Jerome Tuschner
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Patent number: 8111121Abstract: The invention relates to an actuator comprising a leaf spring attached to a carrier in at least one point of attachment, means for providing a magnetic field and means for guiding the magnetic field so as to provide a magnetic flux loop. A movable part of the leaf spring is movable relative to the means for providing the magnetic field. The actuator further comprises a drive core attached to the movable part of the leaf spring, which is incorporated in the flux loop, for imparting the relative movement to the movable part. The drive core is so positioned that the magnetic properties of the flux loop are changed under the influence of said relative movement for gearing the magnetic force on the drive core and the spring force of the leaf spring to each other.Type: GrantFiled: July 12, 2006Date of Patent: February 7, 2012Assignee: Technische Universiteit EindhovenInventors: Roger Franciscus Mattheus Maria Hamelinck, Petrus Carolus Johannes Nicolaas Rosielle
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Publication number: 20110248804Abstract: A multistable electromagnetic actuator is provided which addresses a need for a more robust, reliable and energy efficient actuation device. It comprises an armature (10) having a permanent magnet (8), wherein the armature is movable between first and second stable positions, and two electric coils (14a,14b) disposed on opposing sides of the armature along its direction of movement, with their axes substantially aligned with said direction. A magnetic flux container (2) substantially surrounds the armature and the coils to contain magnetic flux generated thereby and to shield its interior from external magnetic flux. In each stable position magnetic flux generated by the permanent magnet (8) extends around a magnetic circuit path including the container so as to retain the armature in its stable position. Energising the coils (14a,14b) causes the armature (10) to move from one stable position to the other. It is suitable for a broad range of applications, including fluid flow control for example.Type: ApplicationFiled: December 8, 2009Publication date: October 13, 2011Applicant: CAMCON OIL LIMITEDInventor: Wladyslaw Wygnanski
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Publication number: 20110214239Abstract: Disclosed is an actuator that realizes reciprocal rotational motion of an electric toothbrush, for example, without utilizing a drive transmission mechanism that is separate from the drive source. In the actuator, a fixed body (120) has a coil (128) that is disposed around a magnet (160) and faces the magnetic planes with different polarities within the magnet (160) at individual prescribed distances, and an outer yoke (150) that covers the outer periphery of the coil (128). The fixed body (120) rotatably supports a movable body (110), which holds the magnet (160), via a coil spring that is an elastic member (130) made from a wire. An alternating current supplying part (140) supplies an alternating current having roughly the same resonance frequency as that of the fixed body (120) to the coil (128) to cause the movable body (110) to vibrate in a reciprocal rotational motion. The coil spring that is the elastic member (130) uniformly disperses stress generated by the vibration.Type: ApplicationFiled: November 10, 2009Publication date: September 8, 2011Inventors: Masaharu Kagami, Kazutaka Sakaguchi, Yuki Takahashi, Shigenori Inamoto
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Publication number: 20110210809Abstract: A linear solenoid includes a pair of soft iron pole members which are in a spaced apart linear arrangement. A permanent magnet is attached to the end of a plunger which rides between the pole members. When a first of two electro-magnet coils is energized the plunger which is latched to one of the pole members is repelled to the opposite pole member and latched. When the second coil is energized the plunger returns to the original pole member and is latched.Type: ApplicationFiled: April 16, 2010Publication date: September 1, 2011Inventor: Victor Nelson
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Publication number: 20110187483Abstract: The invention refers to a Rotary Solenoid comprising a stator and rotor that can rotate around a rotational axis. The rotor has a rotor shaft on which a rotor disc is arranged. The rotor disc is, seen in the direction of the circumference, polarized alternating magnetically. The stator carries at least one coil. On the coil windings of electrically conducting wire are provided. For guiding the magnetic flow of the magnetic field generated by the coil a pole face consisting of several partial pole faces is provided.Type: ApplicationFiled: December 20, 2010Publication date: August 4, 2011Inventors: Winfried WILLBURGER, Daniel Kreuzer
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Patent number: 7982567Abstract: An actuator comprising: a fixed part comprising a ferromagnetic yoke and a magnetized assembly mounted on a face of the yoke and extending substantially over the whole dimension of said face parallel to the axis of movement of a moving part, the moving part comprising a ferromagnetic element comprising a first air-gap surface to form a magnetic air-gap of variable thickness and a second air-gap surface parallel to the axis of movement to form a residual magnetic air-gap of constant thickness with a corresponding air-gap surface of the magnetized assembly. an excitation coil. An electric switch apparatus equipped with the actuator.Type: GrantFiled: August 14, 2008Date of Patent: July 19, 2011Assignee: Schneider Electric Industries SASInventors: Christophe Cartier Millon, Christian Bataille, Philippe Pruvost
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Publication number: 20110107864Abstract: An assembly for actuating a synchronizer includes a shift fork, a shift rail, and a permanent magnet connected to the shift rail. A first control coil is disposed in proximity to the permanent magnet. The first control coil is operable to produce a magnetomotive force on the permanent magnet in a first direction when a current is applied to the first control coil. A second control coil is disposed in proximity to the permanent magnet. The second control coil is operable to produce a magnetomotive force on the permanent magnet in a second direction when a current is applied to the second control coil. The permanent magnet is moved to a first position when the current is applied to the first control coil and the permanent magnet is moved to a second position when the current is applied to the second control coil. Movement of the magnet in turn moves the synchronizer between engaged positions.Type: ApplicationFiled: November 9, 2009Publication date: May 12, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Shushan Bai, Vijay A. Neelakantan, Paul G. Otanez
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Publication number: 20110037546Abstract: The invention relates to an electromagnetic actuator to be mounted in a haptic-feedback control device (1) for transmitting a haptic feedback to a user, wherein said actuator (5a, 5b) comprises a fixed portion (9) and a mobile portion (11), said fixed (9) and mobile (11) portions forming a magnetic circuit defining at least one air gap (e) between said fixed (9) and mobile (11) portions. According to the invention, the actuator (5a, 5b) further comprises: at least two permanent magnets (23a, 23b) respectively generating first (B1) and second (B2) opposite magnetic fields; and an electric coil (25) provided between said magnets (23a, 23b) such that the winding of said coil (25) extends successively through said first (B1) and second (B2) opposite magnetic fields so that, when a current flows through said coil (25), the actuator (5a, 5b) is submitted to a resulting actuation force in a common driving direction for translating said mobile part (11) in said air gap (e).Type: ApplicationFiled: April 20, 2009Publication date: February 17, 2011Applicant: DAVInventor: Bruno Marie
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Patent number: 7843293Abstract: Disclosed is a magnetic drive for an electrical switch, including a linear armature (26) displaceable between two ends positions, a shunt body (27) mounted at a distance from said armature and means (24, 25, 30, 31) for generating a magnetic field. The magnetic field exerts a force on the armature (26) retaining the latter in the end positions. By joining the shunt body (27) with the armature (26), the course of the flow lines of the magnetic field are changed in such a way that the retaining force exerted on the armature (26) is reduced and the latter is displaced to the other end position, optionally by a force exerted externally on the armature (26), and retained in the position by the magnetic field. Disconnection is effected by the shunt body (27), were after being joined with the shunt body (27) the armature (26) is moved from the end position opposite the shunt body (27) to the end position facing the shunt body (26).Type: GrantFiled: February 18, 2000Date of Patent: November 30, 2010Assignee: E.I.B.S.A.Inventors: Marc Bonjean, Roger Nicolaye
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Patent number: 7817001Abstract: In actuating devices such as, e.g., multifunctional actuators, it is necessary in many cases to block at least one specific direction of movement. A simple and reliably operating device is proposed for this purpose, which uses an electromagnet to bring a ball from a rest position into a blocking position. In the blocking position, the ball mechanically blocks the relative movement between two parts.Type: GrantFiled: December 3, 2007Date of Patent: October 19, 2010Assignee: Preh GmbHInventor: Andreas Kramlich