Shape Or Spacing (e.g., Multiple Phase Winding) Patents (Class 310/12.22)
  • Patent number: 10836261
    Abstract: An inductor unit according to one embodiment includes a first inductor comprising a first core and a first winding wound around the first core; and a second inductor comprising a second core and a second winding wound around the second core. The first inductor and the second inductor are disposed so that an angle is larger than 0 degree and smaller than 90 degrees. The angle is formed by: a first straight line coupling a first intersection point of a first center line in parallel with a first magnetic flux direction of the first core and a second center line perpendicular to the first magnetic flux direction, and a second intersection point of a third center line in parallel with the second magnetic flux direction of the second core and a fourth center line perpendicular to the second magnetic flux direction; and the first center line.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: November 17, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsu Shijo, Kenichirou Ogawa, Akiko Yamada, Noriaki Oodachi, Shuichi Obayashi
  • Patent number: 10651718
    Abstract: An Electrical Linear Motor having a number of electrical windings with long linear sections arranged parallel to the linear path of the motor. A row of equidistant magnets parallel to the linear path and having alternating magnetic field direction perpendicular to the linear path of the motor is provided. A number of magnetic circuits each enclose some of the long linear winding sections, further referred as “set of long linear sections”. Any two of these magnetic circuits enclose a different set of long linear sections. Each magnetic circuit is provided with an opening receiving the magnet row. The magnet row and the magnetic circuits slide along the linear path relatively to each other to vary working force. A required force value is obtained by controlling the current in the windings for each position of the moving row relative to the magnetic circuits.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: May 12, 2020
    Assignee: MOTX Ltd.
    Inventor: Yves Villaret
  • Patent number: 10532908
    Abstract: An elevator system includes a lane and at least one rail extending along the lane. An elevator car is arranged in the lane and is operatively coupled to the at least one rail. The elevator car has a predetermined alignment relative to the at least one rail. A propulsion system is operatively connected between the elevator car and the at least one rail. A thrust and moment control system is operatively connected to the propulsion system. The thrust and moment control system selectively controls the propulsion system to substantially maintain the predetermined alignment of the elevator car relative to the at least one rail.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: January 14, 2020
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Randall Roberts, David Ginsberg, Konda Reddy Chevva, Walter Thomas Schmidt
  • Patent number: 10523139
    Abstract: A power tool is provided including: an electric brushless direct current (BLDC) motor having rotor and a stator defining phases; a power unit including a first switch circuit connected electrically between a first power supply and the motor, and a second switch circuit connected electrically between a second power supply and the motor; and a controller configured to control a switching operation of the first switch circuit and the second switch circuit to regulate a supply of power from at least one of the first power supply and/or the second power supply to the motor.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: December 31, 2019
    Assignee: Black & Decker Inc.
    Inventor: John D. Cox
  • Patent number: 10512937
    Abstract: A vibration motor includes a stationary portion, a vibrating body, an elastic member, and a damper member. The elastic member includes a first extending portion, a second extending portion, a first connection portion, a second connection portion, a third extending portion, a fourth extending portion, a third connection portion, a fourth connection portion, and a fifth connection portion. The damper member includes a first longitudinal portion and a second longitudinal portion. An inner section including the first extending portion, the third extending portion, and the fifth connection portion directly opposes an upper surface of a weight in plan view in an up-down direction.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: December 24, 2019
    Assignee: NIDEC SEIMITSU CORPORATION
    Inventors: Zendi Mori, Mitsuru Murata
  • Patent number: 10411134
    Abstract: A display device includes a gate electrode on a substrate of a semiconductor device, a gate insulating film over the gate electrode, an active layer comprising an oxide including indium, zinc and gallium on the gate insulating film, and overlapping the gate electrode, and a source electrode and a drain electrode that are spaced apart from each other, wherein the active layer is formed from a zinc-rich target material, and an atomic % ratio of indium, zinc and gallium in the active layer is different from an atomic % ratio of the zinc-rich target material.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: September 10, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Min-Cheol Kim, Youn-Gyoung Chang, Kwon-Shik Park, So-Hyung Lee, Ho-Young Jung, Ha-Jin Yoo, Jeong-Suk Yang
  • Patent number: 10381954
    Abstract: An MSM actuator system, comprising at least one expansion unit (22) having a magnetic shape memory material (MSM); coil means (27) for creating the magnetic flux; and flux-conducting means (10 to 16) made from a magnetically conductive material, the flux-conducting means constructed for enclosing by means of the coil means and magnetically flux-conducting contacting of the expansion unit by means of mutually opposite end sections (18, 20).
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: August 13, 2019
    Assignee: ETO MAGNETIC GmbH
    Inventors: Thomas Schiepp, Markus Laufenberg
  • Patent number: 10343503
    Abstract: Linear motor actuated moonroofs are provided to include first and second channels and a glass sheet with a first and second edge each contained in the first and second channel, respectively. Each of the first and second channel has a plurality of magnets, which are configured to interact with a plurality of coils positioned on the top and/or bottom surface of the glass sheet proximate to the first and second edges. The plurality of coils are selectively energized by a control module to induce a movement of the glass sheet relative to the first and second channels. In some examples, the moonroof and associated components are contained within a cassette. The plurality of coils are preferably affixed to the glass sheet surfaces by a lithographic or silk-screen printing process.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: July 9, 2019
    Assignee: Ford Global Technologies LLC
    Inventors: Andrew Louey, Graeme Cameron
  • Patent number: 10110107
    Abstract: A linear vibration motor includes a housing with an accommodation space; a vibration system in the accommodation space; an elastic part supporting the vibration system; and a magnetic circuit system with a magnetic gap for driving the vibration system to vibrate. The vibration system includes a connecting part including a first support portion, a plurality of second support portions extending respectively from the first support portion for fixing the weights, a coil suspended by the elastic part in the magnetic gap, two weights located symmetrically about the coil and fixed by the connecting part, and at least two clamping portions extending from the first support portion and connected respectively to two weights at the side near the coil for limiting the movement of two weights relative to the coil.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 23, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventor: Shun Guo
  • Patent number: 10063128
    Abstract: The present disclosure relates to a linear vibrator including a bottom plate, a voice coil fixed on the bottom plate, a mass block which has a receiving space and located above the voice coil, a magnet array in the receiving space, the magnet array including odd number of longitudinally magnetized first magnets and even number of transversely magnetized second magnets, the first magnets and the second magnets being arranged alternately in a row, and the adjacent first magnets in opposite magnetization direction and the adjacent second magnets in opposite magnetization direction.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: August 28, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Hongxing Wang, Fei Hou, Lubin Mao, Shun Guo
  • Patent number: 9933055
    Abstract: The invention is a driving mechanism for exerting a pre-determined torque characteristic, comprising a stepper motor (12) having a motor shaft, a rotation measuring device detecting the angular position of the motor shaft (14), a motor control unit effecting the torque characteristic on the basis of the angular position of the motor shaft (14), a drive shaft (10) exerting the torque characteristic and an essentially backlash-free transmission connecting the drive shaft (10) with the motor shaft (14), and the motor control unit is a local motor control unit providing operating signals to the stepper motor (12) and being programmable in at least one parameter.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: April 3, 2018
    Assignee: Jedik Innovation KFT.
    Inventors: Jozsef Veres, Akos Sandor Tar, Gyorgy Gabor Cserey
  • Patent number: 9281735
    Abstract: Advantageous motors, such as flux-switching linear synchronous motors (FSLSMs) are provided. In an FSLSM, all magnets can be magnetized in the same direction. In addition, an FSLSM can be yokeless and can have two stators displaced from one another by half a pole pitch. FSLSMs of the subject invention are cost-effective and provide high thrust, and can operate well even under fault conditions.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: March 8, 2016
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Arun Gandhi, Leila Parsa
  • Patent number: 9118237
    Abstract: A mover for a linear motor includes an armature having a plurality of teeth arranged along a line and wound with coils. The mover further includes a main-pole magnet array arranged at a side of the armature at which the teeth exist. The main-pole magnet array includes a plurality of main-pole magnets with different polarities alternately arranged along an arranging direction of the teeth. The mover further includes at least one auxiliary-pole magnet arranged adjacent to one end or both ends of the main-pole magnet array.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: August 25, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Shogo Makino, Toru Shikayama
  • Patent number: 8987951
    Abstract: Disclosed is a linear vibrator, the linear vibrator including a stator having first and second coil blocks coupled to a bottom plate of a casing, a vibrator having a magnet disposed at a position corresponding to the first and second coil blocks, and an elastic member elastically supporting the magnet.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 24, 2015
    Assignee: EM-Tech Co., Ltd
    Inventor: Youngil Park
  • 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
  • Publication number: 20140312717
    Abstract: A ironless magnetic motor (21-23) employs a magnetic track (30) and a forcer (40). The forcer (40) is orientated in relations to a magnetic field (?) across a linear air gap of the magnetic track (30) to generate a drive force (FX) parallel to the X drive axis and orthogonal to the Z levitation axis in response to a commutation drive current (IX) and to generate a force (FZ, FY) orthogonal to the X drive axis in response to a commutation coil current (IZ, IY) being superimposed on and phase shifted from the commutation drive current (IX). To this end, a set of levitating turns of the coil (41) parallel to the X drive axis and orthogonal to the Z levitation axis may be internal or external to magnetic field (?), and the forcer (40) may be centered or offset from a center X-Z longitudinal axis (CP) of the linear air gap.
    Type: Application
    Filed: July 3, 2014
    Publication date: October 23, 2014
    Inventors: Georgo Zorz Angelis, David Biloen
  • Patent number: 8860260
    Abstract: A system contains a first actuator half containing a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a first metallic backing. A second actuator half is also providing within the system, which contains a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a second metallic backing. The system also contains a mechanical flexure suspension having at least one flexure supporting a permanent magnet that is capable of moving, wherein the mechanical flexure suspension is located between the first actuator half and the second actuator half.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: October 14, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Ian MacKenzie
  • Patent number: 8853894
    Abstract: Cogging forces of a cylindrical linear motor are reduced with a linear motor having a rotor with eight poles and a stator with 36 toroidal coils (optionally multiples of eighteen toroidal coils) inserted into slots (N1 to N36) (or a multiple of 36 slots). The toroidal coils extend in the circumferential direction of the stator, are of equal size, and are arranged axially one behind the other. All the terminals of the toroidal coils are located in an axially extending connector channel. The two terminals of each coil are connected according to a specific connection scheme.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: October 7, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Fick, Armin Stäblein, Rolf Vollmer
  • Patent number: 8849482
    Abstract: A passenger transportation system having at least one rail extending along a path; at least one trolley movable along the rail; an actuating device having a linear electric motor, in turn having at least one slide fitted to the trolley, and a linear stator extending at least partly along the path, and having an elongated body, and a quantity of power windings embedded in the elongated body; and a quantity of sensors configured to control the position of the trolley, the sensors being fitted to the elongated body and so positioned as to minimize noise generated by the power windings on the sensors.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 30, 2014
    Assignee: Rolic International S.AR.L.
    Inventors: Walter Sonnerer, Giuseppe Conte
  • Patent number: 8810082
    Abstract: The invention relates to a small size and lightweight linear motor having small thrust ripples, in which the magnetic attraction working between an armature and a mover is canceled out and therefore is small. A thrust generation mechanism includes a stator (3) and a mover (5). The mover (5) includes permanent magnets (4) installed in a row so that the magnetic poles at the front and backsides of the magnets are alternately reversed along the traveling direction. The stator (3) includes upper and lower pole teeth (6), (7) having a plurality of magnetic poles (2) and arranged so as to sandwich the permanent magnets (4) of the mover (5), cores for connecting the pole teeth, and a winding (1) wound around a set of a plurality of the cores. Thrust ripples are reduced by adjusting the magnetic pole pitch (Pc) of the magnetic poles (2).
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: August 19, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Aoyama, Yoshitaka Iwaji
  • Patent number: 8803372
    Abstract: An ironless magnetic motor includes a magnetic track and a forcer. The forcer is oriented in a magnetic field across a linear air gap of the magnetic track to generate a drive force parallel to the X drive axis and orthogonal to the Z levitation axis in response to a commutation drive current and to generate a force orthogonal to the X drive axis in response to a commutation coil current being superimposed on and phase shifted from the commutation drive current. To this end, a set of levitating turns of the coil parallel to the X drive axis and orthogonal to the Z levitation axis may be internal or external to magnetic field, and the forcer may be centered or offset from a center X-Z longitudinal axis (CP) of the linear air gap.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: August 12, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Georgo Angelis, David Biloen
  • Patent number: 8791607
    Abstract: The present invention relates to an electric linear drive, particularly for a rotary-lifting motor. Such a linear drive includes a winding system including a plurality of wound coils which are arranged to be coaxial to each other and successive in axial direction, and a magnet system which is movable in axial direction relative to the winding system and includes a plurality of axially successive permanent magnets. The winding system is normally fed by a controlled converter. The coils of the winding system and the permanent magnets of the magnet system define an air gap thereinbetween. Furthermore, a sensor is provided for detecting the relative movement of winding system and magnet system and for detecting the relative position of the two systems, the sensor being used for scanning a timing ruler mounted on the outer circumference of the magnet system.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: July 29, 2014
    Assignee: Maxon Motor AG
    Inventors: Alexis Boletis, Hugo Fritschy, Remo Hofstetter, Jens Oliver Schulze, Raniero Pittini, David Ramon, Max Erick Busse-Grawitz
  • Patent number: 8742632
    Abstract: A linear motor includes an assembly of two magnets separated by a non-magnetic spacer wherein the assembly is coaxially affixed inside of a housing, which results in an air gap therebetween. The magnets are positioned to have a same direction of magnetization. A first embodiment of the motor includes a coil carrier having a single electrical coil of two sections wound in the same direction and positioned into the corresponding two winding areas of the carrier. The coil carrier is movably positioned into the air gap and further to surround the assembly, thereby moving along an axial direction of the motor. A second embodiment includes two coils that wound in a same direction with the respective separated wires and positioned into the respective two winding areas of the coil carrier.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: June 3, 2014
    Assignee: Moticont
    Inventors: Fariborz Aaron Eghbal, Joseph Benjamin Hanukaai, Vahid David Hannani
  • Patent number: 8729745
    Abstract: A linear switched reluctance motor comprises a movable coil bracket including first and second coil assemblies. Each of the first and second coil assemblies further comprises a plurality of coils separately wound around a plurality of motor coil cores, each of the coils being configured to receive a sinusoidal current at a different phase from other coils comprised in the same coil assembly. Tooth members of a stator track are located adjacent to the motor coil cores such that a magnetic flux path is created which passes through the motor coil core, the stator track and an air gap between the motor coil core and the stator track. A multiple-phase motor driver electrically connected to the first and second coil assemblies generates symmetric multiple-phase sinusoidal currents for driving the motor.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: May 20, 2014
    Assignee: ASM Assembly Automation Ltd
    Inventors: Wai Chuen Gan, Gary Peter Widdowson, Siu Yan Ho
  • Publication number: 20140132088
    Abstract: A primary part of an ironless linear motor includes a cooling plate on which flat coils are disposed, each having a central opening. The coils are pressed onto the cooling plate by holding pieces which taper toward the cooling plate and engage in the openings in the coils. In this manner, an especially good contact is produced between the flat coils of the primary part and the cooling plate prior to encapsulating the primary part with a synthetic resin, the cooling effect of the preferably actively cooled cooling plate thereby being increased markedly.
    Type: Application
    Filed: November 14, 2013
    Publication date: May 15, 2014
    Applicant: ETEL S.A.
    Inventor: Jean-Pierre Morel
  • Patent number: 8680721
    Abstract: A positioning device includes a planar motor having a stator and a translator, one of the stator and the translator including a periodic magnet structure and another of the stator and the translator including at least one coil that is adapted to carry an electric current, wherein the coil includes a wound strip of sheet-like electrically conductive material, and wherein an edge of the coil is provided with a rounded profile.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 25, 2014
    Assignee: ASML Netherlands B.V.
    Inventors: Juraj Makarovic, Rody Koops, Tom Van Zutphen
  • Publication number: 20130264893
    Abstract: Disclosed is a stator device adapted to be arranged in an electrical machine, where the electrical machine further includes a moving device, where the stator device is a multi-phase stator device, where the phases are arranged side-by-side in a direction perpendicular to direction of motion of the moving device, and where each phase comprises a first stator core section having a set of teeth, a second stator core section having a set of teeth, and a coil, and where the teeth are arranged to protrude towards the moving device; and wherein at least two neighboring phases share a stator core section, so that the first stator core section of a first phase and a second stator core section of a second phase is formed as a single unit.
    Type: Application
    Filed: April 12, 2013
    Publication date: October 10, 2013
    Applicant: HOGANAS AB (PUBL)
    Inventors: GLYNN JAMES ATKINSON, ALAN G. JACK, BARRIE MECROW
  • 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: 8422173
    Abstract: A dual pole linear actuator includes a dual pole magnet assembly that is moved by providing a bi-directional analog DC control signal to a dual wound coil. The dual pole magnet assembly includes a permanent magnet that is flanked by top and bottom pole pieces. The dual wound coil is assembled to an actuator housing with a top part of the coil being wound in one rotary direction, while the bottom part of the coil is wound in the opposite rotary direction.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: April 16, 2013
    Assignee: Oracle International Corporation
    Inventors: Darryl W. Yeakley, Frank A. Goodknight
  • Patent number: 8358039
    Abstract: A system contains a first actuator half containing a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a first metallic backing. A second actuator half is also providing within the system, which contains a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a second metallic backing. The system also contains a mechanical flexure suspension having at least one flexure supporting a permanent magnet that is capable of moving, wherein the mechanical flexure suspension is located between the first actuator half and the second actuator half.
    Type: Grant
    Filed: October 17, 2009
    Date of Patent: January 22, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Ian MacKenzie
  • Patent number: 8283815
    Abstract: The invention relates to an electrical machine (1, 110), which is in particular a synchronous machine, which has a primary part (3, 130) and a secondary part (5, 120), wherein the primary part (3, 130) has a) a first means (9) for producing a first magnetic field and b) a further means (17, 27, 29) for producing a further magnetic field, which in particular is an exciter field, and wherein the first means (9) has at least one winding, and the further means (17, 27, 29) is arranged in the region of an active air gap (21) of the electrical machine between the primary part and the secondary part and has magnetic poles, each having at least one permanent magnet (17).
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: October 9, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rolf Vollmer
  • Patent number: 8264311
    Abstract: A magnet unit includes a first magnetic pole (7a), a second magnetic pole (7b) and a third magnetic pole (7c) at a center between the first magnetic pole (7a) and the second magnetic pole (7b), providing an E-shaped configuration. In the magnet unit, a first magnet is defined between the first magnetic pole (7a) and the third magnetic pole (7c) by connecting two electromagnets (71aa, 73aa) with each other through a permanent magnet (72a), while a second magnet is defined between the second magnetic pole (7b) and the third magnetic pole (7c) by connecting two electromagnets (71ba, 73ba) with each other through a permanent magnet (72b). With this configuration, it is possible to reduce a deviation in the length of respective magnetic paths from the permanent magnets (72a, 72b) up to their respective magnetic poles. By controlling exciting currents to the respective electromagnets (71aa, 73aa, 71ba, 73ba), it is also possible to adjust fluxes (or flux density) in respective directions x, y individually.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: September 11, 2012
    Assignee: Toshiba Elevator Kabushiki Kaisha
    Inventors: Hiroaki Ito, Mimpei Morishita, Yosuke Tonami
  • Patent number: 8232689
    Abstract: An electromagnetic machine (1) comprises an electrical conductor vane (7) disposed between two magnetic arrays (3). The electrical conductor vane (7) comprises a plurality of electrically insulated conductors (35), wherein when the conductors (35) are disposed in magnetic fields produced by the magnetic arrays (3) and when current flows in the conductors (35), an electromagnetic force is induced to cause movement of the magnetic arrays (3) relative to the electrical conductor vane (7) and wherein the set of conductors (35) substantially fills the gap between the magnetic arrays (3) through which the magnetic fields pass.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: July 31, 2012
    Assignee: Guilden Limited
    Inventor: Phillip Raymond Michael Denne
  • Publication number: 20120170153
    Abstract: A dual pole linear actuator includes a dual pole magnet assembly that is moved by providing a bi-directional analog DC control signal to a dual wound coil. The dual pole magnet assembly includes a permanent magnet that is flanked by top and bottom pole pieces. The dual wound coil is assembled to an actuator housing with a top part of the coil being wound in one rotary direction, while the bottom part of the coil is wound in the opposite rotary direction.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 5, 2012
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Darryl W. Yeakley, Frank A. Goodknight
  • Patent number: 8159093
    Abstract: A motor apparatus includes a movable portion including a coil and a tooth-like salient pole and a platen opposed to the movable portion. The movable portion and the platen move relative to each other by using a magnetic field generated by supplying a current to the coil. The platen includes a base material having a surface on which convex portions and first concave portions are periodically arranged, a first thermally sprayed layer formed on the surface of the base material by thermal spraying such that second concave portions are formed inside the first concave portions, and a resin filled in the second concave portions.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: April 17, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Iwatani, Yoshikazu Miyajima
  • Publication number: 20120086287
    Abstract: A linear motor includes a field magnet and an armature. The field magnet includes a pair of opposing field magnet yokes. A yoke base is disposed on a first end of each field magnet yoke in a Y axis direction. Between the field magnet yokes, a first magnet row is disposed including, along an X axis direction, a plurality of opposing pairs of first magnets having different polarities. Between the field magnet yokes, a second magnet row is disposed to a first side or a second side of the first magnet row in the Y axis direction. The second magnet row includes a pair of opposing second magnets having different polarities and forming a single row in the Y axis direction on the field magnet yokes. The armature includes a first armature coil opposite the first magnet row and a second armature coil opposite the second magnet row.
    Type: Application
    Filed: September 21, 2011
    Publication date: April 12, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Toshiyuki HOSHI, Kenji Watanabe
  • Patent number: 8154156
    Abstract: A coil assembly for a linear motor includes a coil unit which has multiple adjacently arranged coils, a base, and a resin encapsulated layer. The coils have two corresponding vertical action sides, a first non-action side, and a second non-action side. The coils further form multiple interlaced first bending sections on the first non-action side. Plural conducting wires disposed on the second non-action side could connect to an external cable on an end section of the coil unit. The base has a receiving slot thereon. The cross-section of the receiving slot corresponds in shape to that of the first bending sections for insertion of the coils. The resin encapsulated layer covering the coils and sealing the receiving slot of the base increases the contacting area between the coils and the inner wall of the receiving slot of the base to enhance the heat dissipation rate.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: April 10, 2012
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Patent number: 8149520
    Abstract: A rotary actuator includes a multi-polar magnet, in which north and south poles are alternately arranged in a circumferential direction, the multi-polar magnet being shaped into one of a circular ring and a circular arc member; and a coil body having coils which are provided around the multi-polar magnet to be capable of moving in the circumferential direction of the multi-polar magnet, each of the coils substantially lying on a plane that extends in a radial direction of the multi-polar magnet and orthogonal to the circumferential direction of the multi-polar magnet. The north and south poles of the multi-polar magnet are positioned apart from each other by a predetermined interval in the circumferential direction. Dimensions of each coil are predetermined so that length of each coil in the circumferential direction is associated with the predetermined interval. Predetermined currents are passed through the coils in a properly phased manner.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: April 3, 2012
    Assignee: Pentax Ricoh Imaging Company, Ltd.
    Inventor: Yuichi Kurosawa
  • Patent number: 8115348
    Abstract: The present invention discloses a unit coil, a coil assembly and a coreless type linear motor. The unit coil includes bent subcoils arranged adjacent to one another and disposed on a non-acting side axially. The coil assembly includes tri-phase unit coil modules arranged in an operating direction, and the tri-phase unit coil module is composed of three identical unit coils alternately stacked and sealed by a resin layer, and the unit coil is formed by bending and stacking sub-coils. The bent sub-coils are stacked to a sufficient thickness or arranged to a sufficient width to achieve the desired driving force, and then a magnetic rail is provided to form a coreless type linear motor. In the aforementioned structure, the unit coil composed by an alternately overlapping layout method effectively reduces the required space of the coil assembly, and the sub-coils can be manufactured easily and will not be damaged easily.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: February 14, 2012
    Assignee: Chieftek Precision Co., Ltd.
    Inventors: Ming-Che Hsu, Chi-Wen Chung, Yung-Ho Hsiao, Wen-Jeng Wu
  • Patent number: 8115581
    Abstract: Embodiments of the present invention provide an apparatus, comprising a field emission source having polarities and positions in accordance with a code, a plurality of connected coils adapted to move proximate to said field emission source and having positions in accordance with said code, and wherein an electrical pulse is created when said field emission source is aligned with said plurality of connected coils according to said code.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: February 14, 2012
    Assignee: Correlated Magnetics Research, LLC
    Inventors: Larry W. Fullerton, Mark D. Roberts
  • Patent number: 8110950
    Abstract: A coreless linear motor having a high rigidity, a high heat radiation effect, and a light weight is provided. The coreless linear motor includes a fixed member and a movable member moving relative with respect to the fixed member. The fixed member has a yoke and groups of permanent magnets arranged in the yoke. The movable member has a coil assembly. The groups of permanent magnets include first and second groups of permanent magnets arranged so as to face each other. Each of the first and second groups of permanent magnets has a plurality of magnets along a longitudinal direction of the yoke. In the plurality of magnets, magnetic poles of magnets facing along the longitudinal direction of the yoke alternate. Magnetic poles of the permanent magnets along the longitudinal direction of the yoke are the same.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: February 7, 2012
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Tsuyoshi Moriyama, Ikuma Naruyoshi, Tomoyuki Hoshikawa
  • Patent number: 8102085
    Abstract: The invention relates to a short stroke linear motor. In order to improve the dynamics of such a short stroke linear motor, the primary part (12) of the motor is provided with a single-strand winding. The primary part (12) and the secondary part (1) have essentially the same pole pitch (tZ=tM). In this way, a very high motor torque is produced in a limited range of displacement. In order to be able to reach a plurality of working positions without an inactive intermediate position, a short stroke linear motor having a double-strand winding is additionally provided, both strands being operated at a phase difference of <90°. The pole pitch of the primary part and the secondary part are again essentially the same.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: January 24, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Zeljko Jajtic, Markus Knorr
  • Patent number: 8076804
    Abstract: The invention relates to a primary component (2) for an electric motor (1), said primary component (2) being formed from at least one bundle of laminations (3) and comprises at least one flux guiding element (10) on one or both front faces (S1, S2) to reduce the ripple effect, said primary component (2) being separated from a secondary component (7) by a first air gap (?1). The primary component (2) has at least one section (?2) in the region of the flux guiding element (10), said section (?2) being electrically non-conducting (Kel=0) and having a negligibly low magnetic permeability (?r?1).
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: December 13, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Zeljko Jajtic, Christian Volmert
  • Patent number: 8067863
    Abstract: An apparatus comprises a linear electromagnetic actuator which has a series of ferromagnetic poles, coils, and a series of permanent magnets to interact with the poles to induce movement of the actuator along a path. The poles have non-uniform configurations.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: November 29, 2011
    Assignee: Bose Corporation
    Inventor: Marco Giovanardi
  • Publication number: 20110227423
    Abstract: A coil assembly for a linear motor includes a coil unit which has multiple adjacently arranged coils, a base, and a resin encapsulated layer. The coils have two corresponding vertical action sides, a first non-action side, and a second non-action side. The coils further form multiple interlaced first bending sections on the first non-action side. Plural conducting wires disposed on the second non-action side could connect to an external cable on an end section of the coil unit. The base has a receiving slot thereon. The cross-section of the receiving slot corresponds in shape to that of the first bending sections for insertion of the coils. The resin encapsulated layer covering the coils and sealing the receiving slot of the base increases the contacting area between the coils and the inner wall of the receiving slot of the base to enhance the heat dissipation rate.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 22, 2011
    Inventor: Ming-che Hsu
  • Patent number: 8008814
    Abstract: A sliding system with onboard moving-coil linear motor is disclosed in which an armature assembly is a printed-circuit board, armature windings of flat configuration and coil stay having a stay and any number of cores made integral with the stay. The armature assembly is held by virtue of the stay at a preselected location inside an interval defined between field magnet arrays and, therefore, is small and compact in height in transverse section. A bed formed in an angled hook-like configuration in a transverse section contributes to shrinkage of the sliding system in either of height and width in transverse section or most compactness of the sliding system in transverse dimension. Moreover, the bed can be selected in length at discretion according to the purpose of usage to provide any desirable stroke length for a single table of a preselected length, getting the sliding system convenient for usage.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 30, 2011
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Eiji Ida, Satoshi Sasaki
  • Publication number: 20110198944
    Abstract: The invention relates to a conductor arrangement (10), to a method for the production thereof, and to a method for using a conductor arrangement, wherein the conductor arrangement for an electric machine, particularly an electric motor, can be moved relative to magnetically active components of the electric machine, wherein the conductor arrangement comprises at least one electrical conductor (12, 13, 14, 15) and a carrier (11) for spatially positioning the conductor, wherein the conductor comprises at least one conductor strand (18, 19, 20, 21) and is arranged in the manner of a coil, and wherein the conductor strand comprises conductor sections (27, 28, 29, 30) that are arranged, at least in sections, perpendicular and parallel to a direction of motion of the carrier or the components, and wherein at least one outer conductor section (27, 28) arranged parallel to the direction of motion has a cross section that is larger than the cross section of the other conductor sections (29, 30).
    Type: Application
    Filed: October 7, 2009
    Publication date: August 18, 2011
    Applicant: ITK DR. KASSEN GMBH
    Inventor: Folkert Kassen
  • Patent number: 7973435
    Abstract: An electrical linear drive device comprises an outer housing consisting of a housing tube and two housing covers disposed at the ends thereof The outer housing defines in the interior thereof a receiving space, into which the drive part of a drive unit in the form of an electrodynamic linear direct drive like a cartridge is placed, and an output drive rod extends outward through the front housing cover. From a drive coil arrangement of the drive unit an electrical operation cable extends to an central electrical interface means. The electrical interface means is disposed laterally on the housing tube and the operation cable and the signal cable extend in a cable channel formed in the wall of the housing tube.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: July 5, 2011
    Assignee: Festo AG & Co. KG
    Inventors: Matthias Finkbeiner, Jurgen Guckel
  • Patent number: 7973436
    Abstract: In the field of electrical linear motors, it is known to make more than one laminate core (20) having teeth (22), wherein grooves (24) are designed between the teeth (22). Until now, coils assigned to the laminate core are arranged on each laminate core. The invention is based on this background. Instead, each coil (18) is arranged with a first section in a groove (24) of a first laminate core (20a) and with a second section in a groove (24) of a second laminate core (20b). The coils are consequently wound in an entirely different direction and now lie in a plane perpendicular to the direction of movement of the secondary part of the electrical linear motor.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: July 5, 2011
    Assignee: Siemens Aktiengedellschaft
    Inventor: Michael Menhart
  • Patent number: 7960877
    Abstract: An electric reciprocating motion device includes a motor having a rotary shaft for outputting a reciprocating rotational power and a motion head coupling with the rotary shaft and being driven to move in a reciprocating motion along an axis of the rotary shaft and in a predetermined swing angle range. The motor is a spring motor including a motor unit and a torsion spring having two ends affixing at a motor housing and to the rotary shaft respectively. After the rotary shaft outputs a mechanical torque at one rotational direction, the torsion spring applies a spring force against the rotary shaft to drive the rotary shaft to rotate backward for generating the reciprocating rotational power. Using the spring motor in the electric reciprocating motion device, the device achieves the goals of simple mechanical structure, small volume, easy to install, and low in cost.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: June 14, 2011
    Inventor: Ming Luo