Plural Stators Or Movable Elements Patents (Class 310/12.15)
  • Patent number: 11387728
    Abstract: A linear motor is provided. The linear motor according to an embodiment of the present disclosure may comprise: a primary member including a plurality of armature modules, each armature module including a magnet core including two or more protruding portions and a coil; and a secondary member including at least one magnet module. The primary member may be fixed and a movable member composed of the secondary member moves by generated thrust. And, along the moving direction, a first interval between first armature modules disposed in a first section may be different from a second interval between second armature modules disposed in a second section after the first section.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: July 12, 2022
    Assignees: KOVERY CO., LTD.
    Inventor: Houng Joong Kim
  • Patent number: 11303175
    Abstract: An electromagnetic motor is described, the electromagnetic motor comprising: a magnet assembly configured to generate a two-dimensional alternating magnetic field having a pitch Pm1 in a first direction and a pitch Pm2 in a second direction; a coil assembly configured to co-operate with the magnet assembly to generate a first force in the first direction and a second force in the second direction, wherein the coil assembly comprises a first coil set comprising a plurality of first coils for generating the first force and a second coil set comprising a plurality of second coils for generating the second force, wherein a ratio R1 of a coil pitch Pc1 in the first coil set in the first direction over Pm1 is different from a ratio R2 of a coil pitch Pc2 in the second coil set in the second direction over Pm2.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 12, 2022
    Assignee: ASML Netherlands B.V.
    Inventors: Maarten Hartger Kimman, Dave Braaksma, Peter Michel Silvester Maria Heijmans, Christiaan Alexander Hoogendam
  • Patent number: 11012019
    Abstract: An electric linear motor, an elevator and a method for controlling rotation of a mover with respect to a stator beam are presented. The electric linear motor includes a number of stator beams, wherein at least one of them includes stators extending in a longitudinal direction of the beam. The motor also includes a number of movers, wherein at least one them includes armatures, wherein each armature is adapted for establishing an electromagnetic coupling with a corresponding stator for moving the mover. The motor also includes an air gap regulator for regulating movement of the mover with respect to the stator beam, wherein the air gap regulator includes guide element(s) arranged for limiting the rotation of the mover with respect to the stator beam.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: May 18, 2021
    Assignee: KONE CORPORATION
    Inventors: Jussi Lähteenmäki, Tuukka Korhonen, Tero Purosto, Tero Hakala
  • Patent number: 10947066
    Abstract: A conveying system includes a plurality of carriers and circuitry. The plurality of carriers has a power source generating thrust in accordance with supply of power and moves along a conveying path. The circuitry is configured to execute detection of a collision between the carriers based on an increase in the thrust in the carriers.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 16, 2021
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Minoru Koga, Hiromitsu Akae, Yuki Honda, Mina Orii, Go Yamaguchi, Sohei Oga, Hidenori Hara
  • Patent number: 10845219
    Abstract: A linear encoder has a stationary part and a moving part, and measures and encodes a relative displacement between the stationary part and the moving part along a linear extent of displacement. The encoder comprises multiple machine sensible elements arranged on one of the parts in a predetermined, pattern; and multiple evenly placed sensors arranged along the other part along the entire linear extent, thereby to measure and encode the displacement. The encoder may be an absolute encoder and may be based on magnetic or optical or any other kind of sensing.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: November 24, 2020
    Assignee: Servosense (SMC) Ltd.
    Inventors: Markus Erlich, Yves Villaret
  • Patent number: 10454345
    Abstract: A linear motor device comprising: a path member including a magnet extending in a movement direction; and a moving body including a coil that is movably mounted on the path member; the linear motor device generates thrust in the movement direction between the magnet and the coil by current being passed through the coil; the moving body further includes a magnetic shielding target object, and a magnetic shielding member formed from strongly magnetic material that shields the magnetic shielding target. The magnetic shielding member includes a parallel shielding plate provided parallel to the movement direction between the magnetic shielding target object and the magnet, and a perpendicular shielding plate provided extending away from the magnet in a direction perpendicular to the movement direction at at least one of a front edge and a rear edge of the parallel shielding plate in the movement direction.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: October 22, 2019
    Assignee: FUJI CORPORATION
    Inventors: Ryo Nagata, Takashi Kido, Yoshihiro Shirakawa, Masaki Kurono
  • Patent number: 10355574
    Abstract: This disclosure discloses a linear motor including a stator, a mover, and a plurality of teeth. The stator includes a stator curved part having an arc shape in a longitudinal direction. The mover is arranged facing the stator and is moved in the longitudinal direction of the stator. The plurality of teeth are arranged in parallel along the longitudinal direction so that a pitch of the teeth at an outer-peripheral side is larger than the pitch of the teeth at an inner-peripheral side on the stator curved part.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: July 16, 2019
    Inventors: Shogo Makino, Toru Shikayama, Masanobu Kakihara, Masayuki Hirayama, Haruki Yahara
  • Patent number: 10158279
    Abstract: An armature includes: an integrated core with multiple split cores coupled to each other; a coupling member for coupling the multiple split cores; a coil attached to the integrated core; a block attachment part provide to a machine attachment side of the integrated core; a protection sheet having ability to be impregnated with resin and covering a surface of the integrated core and a surface of the block attachment part; a block attached to the block attachment part and having a machine attachment surface arranged at the block attachment side of the integrated core; and a resin layer covering the protection sheet covering the integrated core. The machine attachment surface of the block is exposed from the resin layer.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 18, 2018
    Assignee: FANUC CORPORATION
    Inventor: Suguru Takamizawa
  • Patent number: 10135324
    Abstract: An armature for linear motor having excellent precision in attachment to a machine and capable of reducing the likelihood of trouble in a resin layer, entry of a foreign material, and the like is provided. An armature comprises: a block attachment part provided to a machine attachment side of a core; a protection sheet having ability to be impregnated with resin and covering a surface of the core and a surface of the block attachment part; a block attached to the block attachment part and having a machine attachment surface arranged at the block attachment side of the core; and a resin layer covering the protection sheet covering the core. The machine attachment surface of the block is exposed from the resin layer.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 20, 2018
    Assignee: FANUC CORPORATION
    Inventor: Suguru Takamizawa
  • Patent number: 10107276
    Abstract: A linear compressor includes a cylinder defining a compression space for a refrigerant, a piston reciprocated in an axis direction within the cylinder, and a linear motor providing power to the piston. The linear motor includes an inner stator disposed outside the cylinder, the inner stator including a center core and a side core disposed on at least one side of the center core, an outer stator disposed to be spaced outward from the inner stator in a radius direction, a permanent magnet movably disposed in an air gap defined between the inner stator and the outer stator, and a deformation prevention device for preventing the inner stator from being deformed.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: October 23, 2018
    Assignee: LG Electronics Inc.
    Inventors: Sangsub Jeong, Jongkoo Lee, Jehoon Kim, Ochang Gwon
  • Patent number: 9973065
    Abstract: A method for manufacturing a coil module for a stator for a tubular linear motor includes placing a plurality of bobbins and spacers on a winding mandrel and winding the plurality of bobbins with a single length of wire to form a set of coils. Three sets of such coils are interleaved on an encapsulation mandrel. A plurality of metal comb shaped elements, each including a longitudinal spine and a plurality of teeth are distributed about the circumference of the three interleaved sets of coils to form a coil module. The coil module and the mandrel are surrounded with an encapsulation mold. An encapsulating material is introduced into the encapsulation mold. The encapsulated coil module is removed from the encapsulating mold and the encapsulation mandrel after setting of the encapsulating material.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: May 15, 2018
    Assignee: ZiLift Holdings, Ltd.
    Inventors: Alan Charles McAleese, Richard Edward Clark, Sarah Duggan, Michael Hautop Nielsen
  • Patent number: 9871434
    Abstract: A moving body includes a first position detector configured to detect a position of the moving body by detecting poles of magnets and a second position detector disposed in a different position from a position of the first position detector in a moving direction of the moving body, and configured to detect the position of the moving body. A controller of the moving body determines the position of the moving body on a basis of a position detected by the second position detector when the first position detector is located in an irregular section in which the poles of the magnets are not disposed regularly.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: January 16, 2018
    Assignee: MURATA MACHINERY, LTD.
    Inventors: Yasutake Yamada, Yoshiyuki Azuma
  • Patent number: 9853530
    Abstract: A linear motor unit includes at least one first linear motor in which an armature is disposed spaced from a shaft guide supporting section which is provided at a distal end of a frame, and a shaft guide is disposed on a proximal side of the shaft guide supporting section; and at least one second linear motor in which an armature is disposed in contact with the proximal side the shaft guide supporting section which is provided at the distal end of the frame, and the shaft guide is disposed on the distal side of the shaft guide supporting section, wherein the first linear motors and the second linear motors are alternatively arranged in a width direction of the frame with the respective shaft guides of the linear motors aligned with each other, the shaft guide is rotated by a rotary motor.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 26, 2017
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Yuqi Tang, Kazuhito Yamaura
  • Patent number: 9621097
    Abstract: A linear conveyor includes: a linear motor stator which includes a plurality of electromagnets and in which each predetermined section can be individually controlled for conduction; a plurality of conveyance carriages each of which includes a linear motor mover; a linear scale which includes scale members secured to each of the conveyance carriages, and detectors disposed along a conveyance path; a plurality of motor controllers which individually controls conduction of electromagnets for each section based on the results of detecting the scale members by the detectors; and a data storage unit which stores position correction data for each conveyance carriage, determined based on the movement error of each conveyance carriage measured in advance using a common measurement jig. Each motor controller controls conduction of the electromagnets using the position correction data stored in the data storage.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: April 11, 2017
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Katsuyuki Takagi
  • Patent number: 9157412
    Abstract: The invention relates to a stator frame (12) for a submerged linear generator. According to the invention the stator frame (12) includes a cylindrical tube of metal with mounting means (13, 14, 15, 16) for mounting stator packages to the inside wall of the tube. The stator frame (12) also is the external circumferential wall of the linear generator. The invention also relates to the use of such a stator frame (12) and to a method for manufacturing a linear generator with such a stator frame (12).
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 13, 2015
    Assignee: Seabased AB
    Inventors: Mats Leijon, Erik Doré, Fredrik Axelsson, Rafael Waters
  • Patent number: 9112395
    Abstract: Various electric motor systems are provided to minimize irradiation of harmful (or first) electromagnetic waves. More particularly, an electric motor system is provided with one or more counter units which minimize irradiation of such harmful (or first) waves by suppressing such waves to (or toward) their sources and/or by emitting counter (or second) electromagnetic waves capable of canceling a desired portion of the harmful (or first) waves. Such counter units may then be incorporated into various locations for opposing magnetic poles of basic rotor units and/or basic stator units of the system. Various methods are also provided to minimize irradiation of such harmful (or first) waves by suppressing the harmful (or first) waves toward their sources and/or by canceling such harmful (or first) waves with the counter (or second) waves.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: August 18, 2015
    Inventor: Youngtack Shim
  • Patent number: 9024488
    Abstract: A drive section for a substrate transport arm including a frame, at least one stator mounted within the frame, the stator including a first motor section and at least one stator bearing section and a coaxial spindle magnetically supported substantially without contact by the at least one stator bearing section, where each drive shaft of the coaxial spindle includes a rotor, the rotor including a second motor section and at least one rotor bearing section configured to interface with the at least one stator bearing section, wherein the first motor section is configured to interface with the second motor section to effect rotation of the spindle about a predetermined axis and the at least one stator bearing section is configured to effect at least leveling of a substrate transport arm end effector connected to the coaxial spindle through an interaction with the at least one rotor bearing section.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: May 5, 2015
    Assignee: Brooks Automation, Inc.
    Inventors: Ulysses Gilchrist, Martin Hosek, Jairo Terra Moura, Jay Krishnasamy, Christopher Hofmeister
  • Patent number: 9000626
    Abstract: A thrust generation mechanism includes magnetic pole teeth which are arranged so as to sandwich and hold permanent magnets disposed on movers, cores which serially connect the magnetic pole teeth which sandwich and hold the magnets, armature winding wires which are collectively wound around the cores, and the movers having the magnets arranged such that the different magnetic poles thereof alternately face the front side and the rear side. The magnetic pole teeth which are arranged so as to sandwich and hold the permanent magnets and the armature iron cores which have cores serially connecting the magnetic pole teeth which hold the magnets are arranged in the longitudinal direction of the movers, and armature iron cores have a common winding wire.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: April 7, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Aoyama, Yoshitaka Iwaji
  • Publication number: 20150076929
    Abstract: The present document discloses motors and motor components that are constructed on a planar substrate. In some implementations, the planar substrate is made from rigid or semi-rigid sheet material, such as a printed circuit board (“PCB”). One or more coils are formed using spiral-shaped conductive traces that overlay the front and/or back surfaces of the substrate. In one implementation, a plurality of alternating right-hand and left-hand spiral-shaped conductive traces are separated by insulating layers, and connected with conductive vias to form inductive coils. Alternative coil-configurations include single-drive counter-wound coils and coils having a central ferrous or magnetic core.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 19, 2015
    Applicant: RESONANT SYSTEMS, INC.
    Inventors: Robin Elenga, Brian Pepin, Dan Knodle
  • Patent number: 8947640
    Abstract: A positioning device for positioning an object within a lithographic apparatus, including a support structure for supporting the object, at least two short-stroke units, each connected to the support structure, and a long-stroke unit. In the arrangement, each of the short-stroke units includes a short-stroke actuator system configured to provide independently at least one actuation force between the short-stroke unit and the long-stroke unit, and the long-stroke unit includes a long-stroke actuator system configured to provide at least one actuation force between the long-stroke unit and a reference structure of the lithographic apparatus.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: February 3, 2015
    Assignee: ASML Netherlands B.V.
    Inventors: Raymond Wilhelmus Louis Lafarre, Henrikus Herman Marie Cox, Antonius Franciscus Johannes De Groot, Johannes Petrus Martinus Bernardus Vermeulen
  • Publication number: 20140375146
    Abstract: A linear drive and its use for machining an optical workpiece are proposed, the linear drive having a linear movable rotor, a linearly movable compensating body and an electrical compensating drive for movement of the compensating body opposite to the rotor and the rotor extending into the compensating drive and/or a first bearing arrangement mounting the rotor in a torsionally stiff manner and a second bearing arrangement pivotally mounting the rotor.
    Type: Application
    Filed: February 6, 2013
    Publication date: December 25, 2014
    Applicant: Schneider GmbH & Co. KG
    Inventors: Gunter Schneider, Ulf Börner, Klaus Hofmann
  • Publication number: 20140368062
    Abstract: Disclosed is a linear synchronous motor comprising an elongate stator extending in a longitudinal direction and having a plurality of coil windings, and a runner having a multiplicity of successive magnets disposed along the length thereof the longitudinal direction. The elongate stator has a plurality of elongate-stator segments arranged successively in the longitudinal direction, with each elongate-stator segment separated from the next successive elongate-stator segment by a gap. A total section length of one elongate-stator segment and an adjacent gap is a constant value over a plurality of successive elongate-stator segments, wherein a runner length measured in the longitudinal direction across all magnets successively disposed on the runner, is an integer multiple of the total section length.
    Type: Application
    Filed: December 3, 2012
    Publication date: December 18, 2014
    Applicant: ThyssenKrupp Elevator AG
    Inventors: Friedrich Loeser, Qinghua Zheng
  • Patent number: 8884473
    Abstract: A mover configured such that a plate-like magnet magnetized in one longitudinal direction, a soft magnetic element, a plate-like magnet magnetized in the other longitudinal direction, and the soft magnetic element are alternately stacked in the order mentioned above continuously is passed through an armature having a configuration in which a first subunit having core portions extending from a yoke portion in a thickness direction of the mover and a second subunit having core portions extending from a yoke portion in a width direction of the mover are alternately disposed to thereby constitute a linear motor. Windings and are collectively wound around the core portions of the second subunit.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: November 11, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventor: Makoto Kawakami
  • Patent number: 8878399
    Abstract: A multi-shaft linear motor formed by a plurality of single-shaft linear motors is disclosed. Each of the single-shaft linear motors is provided with a magnetic body and an armature. Each of the single-shaft linear motors includes a base plate. The base plate has a base surface defining the moving direction, wherein the stator is fixed onto the base surface along the moving direction, and the mover is attached onto the base surface in a movable manner reciprocating along the moving direction and in opposed relation to the stator. The single-shaft linear motors are stacked in a stacking direction perpendicular to the base surface in such a way that the single-shaft linear motors are individually detachable as a unit, the base plate thereof contains the stator and the mover.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: November 4, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Naoki Hanamura, Kiyotaka Sakai
  • Publication number: 20140320058
    Abstract: A linear conveyor includes: a linear motor stator which includes a plurality of electromagnets and in which each predetermined section can be individually controlled for conduction; a plurality of conveyance carriages each of which includes a linear motor mover; a linear scale which includes scale members secured to each of the conveyance carriages, and detectors disposed along a conveyance path; a plurality of motor controllers which individually controls conduction of electromagnets for each section based on the results of detecting the scale members by the detectors; and a data storage unit which stores position correction data for each conveyance carriage, determined based on the movement error of each conveyance carriage measured in advance using a common measurement jig. Each motor controller controls conduction of the electromagnets using the position correction data stored in the data storage.
    Type: Application
    Filed: October 5, 2012
    Publication date: October 30, 2014
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Katsuyuki Takagi
  • Publication number: 20140265645
    Abstract: A linear controlled motion system comprises a track formed from one or more track sections and having at least one mover mounted to the track and effective for receiving articles at one location and transporting the articles to another location. The system includes at least one magnetic linear motion motor for providing a magnetic field effective for moving each mover in a controlled motion along the track and a magnetic flux bridge for reducing changes in the magnetic flux that reduces the efficiency or interferes with the operation of the controlled motion system.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC
    Inventors: Keith G. Jacobs, Glen C. Wernersbach
  • Patent number: 8794934
    Abstract: A linear compressor for producing a driving force by magnetic induction and naturally modulating a cooling capacity according to a load includes a fixed member provided with a compression space, a movable member which linearly reciprocates inside the fixed member to compress refrigerant, a plurality of springs installed to elastically support the movable member in a motion direction, a first stator through which a current flows, a conductor member magnetically induced by the first stator to make the movable member linearly reciprocate, and a control unit which controls supply of a current with respect to the first stator.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: August 5, 2014
    Assignee: LG Electronics Inc.
    Inventors: Kye-Lyong Kang, Jong-Kwon Kim, Shin-Hyun Park, Hyun Kim, Hee-Dong Kang, Jeong-Uk Lee, Yang-Hoon Jung
  • Publication number: 20140203668
    Abstract: In a linear motor, one of a field system and an armature is configured as a mover and the other is configured as a stator. The field system relatively moves with respect to the armature. The field system includes two yoke boards which are arranged facing each other, a yoke base to which one side ends of the two yoke boards are to be fixed, a plurality of permanent magnets respectively fixed to facing surfaces of the two yoke boards and arranged along a moving direction of the mover, and an elastic member configured to apply force the facing surfaces of the two yoke boards in directions that other side ends of the two yoke boards move away from each other.
    Type: Application
    Filed: June 28, 2013
    Publication date: July 24, 2014
    Inventors: Keiji YANAGI, Tatsuhiko KOBA
  • Patent number: 8786141
    Abstract: Magnetic linear actuator (MLA) and use. The MLA includes a driver portion with motor and rotating mount with a first magnet (M1) having poles aligned in a plane, and an actuator portion, having a frame with a second magnet (M2) proximate to a first end of the frame with a specified pole facing the frame's center, and a third magnet (M3) proximate to a second end of the frame with the specified pole facing the frame's center. The frame holds M2 and M3 collinear with M1, in the plane, and on opposite sides of the M1, and is constrained to move along an axis collinear with M1, M2, and M3. During operation, the motor rotates M1 through a first orientation where M1 attracts M2 and repels M3, then a second orientation where M1 repels M2 and attracts M3, in response to which the frame moves back and forth, e.g., reciprocates.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: July 22, 2014
    Assignee: National Instruments Corporation
    Inventor: David E. Wilson
  • Patent number: 8766496
    Abstract: A linear electric motors including a housing, a first armature movable on a first essentially linear path with respect to the housing, and a second armature movable on a second essentially linear path with respect to the housing, wherein the first armature is mounted to the housing by a first mounting spring, wherein the first armature and the second armature are coupled to each other by a coupling spring, and wherein the second armature is mounted to the housing by a second mounting spring.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: July 1, 2014
    Assignee: Braun GmbH
    Inventors: Frank Ziegler, Robert Schaefer, Uwe Schober, Thomas Meinke
  • Publication number: 20140175910
    Abstract: A multi-shaft linear motor formed by a plurality of linear motors each provided with a magnetic body and an armature and adapted to produce a force causing the magnetic body and the armature to be relatively displaced along a given linear moving direction by interaction of magnetic fluxes generated between the magnetic body and the armature during an operation of supplying electric power to the armature. Each of the single-shaft linear motors includes a base plate. Base plate has a base surface defining the moving direction, wherein the stator is fixed onto the base surface along the moving direction, and the mover is attached onto the base surface in a movable manner reciprocating along the moving direction and in opposed relation to the stator. Single-shaft linear motors are stacked in a stacking direction perpendicular to the base surface such that the single-shaft linear motors are individually detachable as a unit.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 26, 2014
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Naoki HANAMURA, Kiyotaka SAKAI
  • Patent number: 8674561
    Abstract: A multi-head linear motor with cores according to an embodiment includes a permanent magnet field and an armature. The permanent magnet field includes P pieces of permanent magnets. The armature is arranged so as to face the permanent magnet field through a magnetic air gap and includes M pieces of armature coils. Any one of the armature and the permanent magnet field constitutes a mover, the other constitutes a stator, and the mover is arranged in plurality to be lined up over a single piece of the stator to individually drive the movers relative to the stator. Moreover, the movers each include a large thrust mover and a small thrust mover that have different relationships each determined with a magnetic pole number P of the permanent magnets and a number M of the armature coils relative to the stator.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: March 18, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Toshiyuki Hoshi
  • Patent number: 8664808
    Abstract: A linear motor coil assembly includes a base plate (1), a line of iron cores affixed longitudinally on the upper surface of the base plate, multiple coils respectively provided for the iron cores, and a first cooling tube being in contact with contacts the multiple coils and through which a first refrigerant passes. The lower surface of the base plate can be attached to a precision table of a machine tool or a semiconductor manufacturing apparatus. A groove (8) that extends longitudinally in linear fashion is formed on the lower surface of the base plate. A second cooling tube (92, 94), through which a second refrigerant passes, provided within the groove is additionally provided in the linear motor coil assembly.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: March 4, 2014
    Assignee: Sodick Co., Ltd.
    Inventors: Hiroshi Koshimoto, Satoru Tajima
  • Publication number: 20140035393
    Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 6, 2014
    Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
    Inventors: Shi Uk CHUNG, Do Hyun KANG, Byung Chul WOO, Ji Won KIM, Ji Young LEE, Seung Ryul MOON
  • Patent number: 8624446
    Abstract: Disclosed herein is a linear, curved or rotary electric machine. The electric machine includes first and second movers which are adjacent to each other and have a phase angle difference of 60° therebetween. The first mover includes phases U, V and W and the second mover includes phases /U, /V and /W. The electric machine of the present invention can reduce pulsations of thrust caused by end effect. In particular, in the case where the stator includes permanent magnets having the same poles and salient poles which alternate with the permanent magnets, the number of permanent magnets used can be reduced to half of that of a conventional linear electric machine.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: January 7, 2014
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Shi Uk Chung, Do Hyun Kang, Byung Chul Woo, Ji Won Kim, Ji Young Lee, Seung Ryul Moon
  • Patent number: 8624445
    Abstract: This stage apparatus includes a movable table to hold a sample, a levitation unit to operate the movable table at least in a vertical direction, and a linear motor to operate the movable table in a first horizontal direction in a horizontal plane, including a linear motor movable element arranged inside the movable table and a linear motor stator arranged inside the movable table.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: January 7, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Youichi Motomura, Toshiyuki Kono, Yoshiaki Kubota
  • Patent number: 8575792
    Abstract: A stage comprising a first translation platform having a first axis of motion, and a second translation platform having a second axis of motion, a first linear drive motor for driving the first translation platform in the first axis of motion, and a second linear drive motor for driving the second translation platform in the second axis of motion, wherein each linear drive motor further comprises a coil assembly enclosing a rod stator, and wherein the coil assembly is fixed and the rod stator is movable within the coil assembly.
    Type: Grant
    Filed: October 16, 2010
    Date of Patent: November 5, 2013
    Assignee: Thorlabs, Inc.
    Inventors: Jeffrey S. Brooker, Paulo Chaves, Keith Dhese, Robin Eddington
  • Patent number: 8569916
    Abstract: A mover includes a permanent magnet array including permanent magnets magnetized in a perpendicular direction perpendicular to a motion direction of the mover such that magnetic poles having different polarities alternately appear on magnetic pole surfaces of the permanent magnets along the motion direction. A stator includes first and second magnetic pole portion assemblies disposed on both sides of the permanent magnet array in the perpendicular direction and each including magnetic pole portions facing the magnetic pole surfaces, and a single phase winding that excites the magnetic pole portions forming the first and second magnetic pole portion assemblies. The winding has a hollow structure formed by winding a winding conductor into a coil such that the magnetic pole portions included in the first magnetic pole portion assembly and the magnetic pole portions included in the second magnetic pole portion assembly are located in an internal space of the winding.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: October 29, 2013
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Satoshi Sugita, Yasushi Misawa, Yuqi Tang
  • Patent number: 8558486
    Abstract: A d.c. charged particle accelerator comprises accelerator electrodes separated by insulating spacers defining acceleration gaps between adjacent pairs of electrodes. Individually regulated gap voltages are applied across each adjacent pair of accelerator electrodes. In embodiments, the individually regulated gap voltages are generated by electrically isolated alternators mounted on a common rotor shaft driven by an electric motor. Alternating power outputs from the alternators provide inputs to individual regulated d.c. power supplies to generate the gap voltages. The power supplies are electrically isolated and have outputs connected in series across successive pairs of accelerator electrodes. The described embodiment enables an ion beam to be accelerated to high energies and high beam currents, with good accelerator stability.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: October 15, 2013
    Assignee: GTAT Corporation
    Inventors: Theodore H. Smick, Geoffrey Ryding, William H. Park, Ronald Horner
  • Patent number: 8536742
    Abstract: A stator core unit of a linear synchronous motor is divided into a plurality of divided cores. The divided cores each include a pair of connected portions. The pairs of connected portions are disposed along a first direct drive shaft and a second direct drive shaft to form a pair of connected portion arrays. A yoke is constituted from a pair of yoke elements which are formed of a magnetic conductive material and magnetically connect the connected portions of the pair of connected portion arrays. A first array of permanent magnets and a second array of permanent magnets are disposed to be shifted from each other by an electrical angle of 180°. A first array of windings and a second array of windings are excited with the first and second arrays of windings being shifted by an electrical angle of 180°.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 17, 2013
    Assignee: Sanyo Denki Co. Ltd.
    Inventors: Yuqi Tang, Satoshi Sugita
  • Patent number: 8502421
    Abstract: The moving magnet type linear motor according to the present invention comprises a stator comprising a plurality of coils arranged in a single direction and having a both ends support structure supporting both ends of the stator in a direction perpendicular to said single direction, a pair of movers comprising a plurality of permanent magnets arranged opposing the sides of the stator respectively and capable of relative movement in said single direction with respect to each other, and guidance mechanisms guiding both the movers independently and movably in said single direction, and one of the movers is connected to a load.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 6, 2013
    Assignees: Sabanci University, Fujitec Co., Ltd.
    Inventors: Sandor Markon, Ender Kazan, Ahmet Onat
  • Patent number: 8487484
    Abstract: A magnetic drive apparatus includes first and second magnet carriers carrying first and second permanent magnet arrangements. An intermediate magnet carrier disposed between the first and second magnet carriers carries a third permanent magnet arrangement. The magnet carriers are arranged for rotation relative to each other such that the magnet arrangements produce magnetic interactions that result in power stroke forces causing the magnet carriers to undergo relative reciprocation in first and second stroke directions during power zone portions of the relative rotation. The magnetic interactions impart substantially no power stroke forces during dead zone portions of the relative rotation. The dead zones include magnet carrier relative rotation positions wherein opposing magnetic poles are mutually coaxially aligned but produce a substantially equal balance of push and pull magnetic forces.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: July 16, 2013
    Assignee: Torque Multipliers, LLC
    Inventors: Harold L. Miller, Jr., Andrew E. Colson, Jr.
  • Publication number: 20130142364
    Abstract: A linear interleaved magnetic motor in which the B-field flows between a plurality of motor cell elements, creating a long, serpentine gap. The motor is used with at least one flex circuit as a drive coil. The motor can be used as a drive motor for a loudspeaker transducer. Multiple loudspeaker transducers can be connected together to make a loudspeaker frame or system.
    Type: Application
    Filed: December 2, 2012
    Publication date: June 6, 2013
    Inventor: Thomas Paul Heed
  • Patent number: 8456059
    Abstract: An electric generator includes an electric-power generating mechanism of an electrostatic induction type or an electromagnetic induction type, a first rectification portion, an electricity accumulation portion, an outer positive electrode, and an outer negative electrode. The electric-power generation mechanism has a first electrode and a second electrode, and the first rectification portion has input terminals electrically connected to the first electrode and the second electrode respectively, and has an output portion including positive and negative terminals. The electricity accumulation portion has an inner positive electrode electrically connected to the positive terminal, and an inner negative electrode electrically connected to the negative terminal. The outer positive electrode is electrically connected to the inner positive electrode, and the outer negative electrode is electrically connected to the inner negative electrode.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: June 4, 2013
    Assignee: Panasonic Corporation
    Inventor: Masaharu Matsumoto
  • Patent number: 8427015
    Abstract: A multihead-type coreless linear motor includes a permanent field magnet having P permanent magnets that are arranged such that different magnetic poles appear alternately, and an armature having M armature coils that are closely wounded and connected in three phases. One of the armature and the permanent field magnet is configured as a moving part and the other is configured as a stator. A plurality of moving parts are arranged on the same stator and are driven separately. In this multihead-type coreless linear motor, the plurality of moving parts includes a large-thrust moving part and a small-thrust moving part that are different in relationship with the stator, the relationship being determined by the number of magnetic poles P of the permanent magnets and the number of armature coils M.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: April 23, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Toshiyuki Hoshi
  • Publication number: 20130093264
    Abstract: The present invention provides a linear motor where a load onto a supporting mechanism and the ripple of force are lessened and the ripple can be adjusted. As a leakage flux between the magnetic poles can be reduced by being configured by plural magnetic poles arranged with a magnet arranged on a mover held between them, a core that continuously connects the magnetic poles that holds the magnet of the mover between them, windings are integrally wound onto the plural magnetic poles and the mover formed by a row of magnets the magnetic poles of which are alternately arranged or a row of magnets the polarity of which is alternately arranged and magnetic materials, by arranging the plural magnetic poles arranged with the magnet held between and the plural magnetic poles provided with the core that continuously connects the magnetic poles.
    Type: Application
    Filed: June 9, 2010
    Publication date: April 18, 2013
    Applicant: HITACHI LTD
    Inventors: Yasuaki Aoyama, Yoshitaka Iwaji, Kohji Maki
  • Publication number: 20130093265
    Abstract: An electric motor including: a first and second linear actuator, each linear actuator including a first and second coil respectively, a rotational shaft, a cam assembly mounted on the rotational shaft for translating linear movement of the two linear actuators to rotational movement of the rotational shaft, a controller programmed to generate during operation a first and second drive signal for first coil and second coil respectively, wherein the first drive signal causes the first linear actuator to generate a first torque on the rotational shaft that varies periodically over a complete rotation of the shaft and the second drive signal causes the second linear actuator to generate a second torque on the rotational shaft that varies periodically over a complete rotation of the shaft, and wherein the sum of the first and second torques produces a total torque that is substantially constant throughout the complete rotation of the shaft.
    Type: Application
    Filed: August 16, 2012
    Publication date: April 18, 2013
    Applicant: Nucleus Scientific, Inc.
    Inventors: Ian W. HUNTER, Serge LAFONTAINE, Timothy A. FOFONOFF
  • Publication number: 20130076159
    Abstract: The present invention relates to a doubly salient permanent magnet electric machine that has a winding structure in which series-connected windings are included in the phase windings of a mover, and that has a stator implemented as an iron core having a plurality of permanent magnets and a plurality of stator salient poles neighboring the permanent magnets, thus reducing the number of permanent magnets by half. An electric machine is configured such that a mover moves while facing a stator and includes an N (a number of power phases) multiple number of teeth and phase windings wound around the teeth, and one or more pairs of phase windings of the mover mutually having a phase difference of 180° are connected in series, and the stator includes permanent magnets in depressions between individual stator salient poles of an iron core in which the stator salient poles are formed.
    Type: Application
    Filed: March 31, 2011
    Publication date: March 28, 2013
    Applicant: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
    Inventors: Shi Uk Chung, Yeon Ho Jeong, Byung Chul Woo, Ji Young Lee
  • Patent number: 8400044
    Abstract: An electromotive machine (200, 900) comprises a rotor (230; 800; 920) and a stator (210, 220; 500; 600; 700; 910, 920). The stator (210, 220; 500; 600; 700; 910, 920) comprises a first group of primary windings (260a, 240b, 240d; 520; 640a, 640b, 650a, 650b, 660a, 660b; 930a, 930b, 933a, 933b, 937a, 937b), which are concentrated windings, arranged on a first side of the rotor (230; 800; 920) and a second group of primary windings (240a, 250a, 240c; 530; 740a, 740b, 750a, 750b, 760a, 760b; 941a, 941b, 943a, 943b, 947a, 947b) that are concentrated windings arranged on a second, opposite, side of the rotor (230; 800; 920). The primary windings of each group comprise a plurality of coils that, in use, are supplied with current and produce a magnetic field.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 19, 2013
    Assignee: Force Engineering Limited
    Inventor: John Frederick Eastham
  • Patent number: 8384251
    Abstract: A linear and curvilinear motor system includes: linear and curvilinear guiding devices movably guiding and respectively supporting right and left of a slider, each having a guide rail configured by linear tracks and a circular arc track and slider blocks; a motor unit having a stator with a stator linear section and a stator circular arc section and a mover with a linear section and provided for the slider and away from the stator with a gap interposed therebetween; and an encoder head and a hole sensor detecting positions of the linear tracks and the circular arc track. When a magnetic pole pitch of the linear section of the stator is a distance ?m and a magnetic pole pitch of the circular arc section of the stator is an angle ?m, a radius r of the circular arc track at the position detection point is defined as r=?m/?m.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Denki
    Inventors: Toru Shikayama, Mikio Oshima, Kenichi Sadakane, Shogo Makino