Magnet Or Pole Structure Patents (Class 310/12.24)
  • Patent number: 10965177
    Abstract: A motor includes a plurality of ends, including a first end and an opposing second end, an outer surface of the magnetic carrier extends between the ends, and a plurality of magnetic poles including a first magnetic pole and a second magnetic pole, the plurality of magnetic poles disposed on the magnet carrier, extending between the ends, and being adjacent on the outer surface of the magnet carrier, wherein each of the plurality of poles comprising an array of magnets, each magnet in the array of magnets being a permanent magnet, each array of magnets comprising a plurality of magnets including a first magnet and a second magnet, the plurality of magnets differing from each other in one or more of material and magnetic field strength (MGOe), wherein the first plurality of magnets and the second plurality of magnets are adjacently disposed within the array of magnets.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: March 30, 2021
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Beata I. Wawrzyniak, Jagadeesh Kumar Tangudu
  • Patent number: 10903732
    Abstract: A movable core-type reciprocating motor and a reciprocating compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including a movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: January 26, 2021
    Assignee: LG Electronics Inc.
    Inventor: Sangsub Jeong
  • Patent number: 10784760
    Abstract: A core-type linear motor includes: a stator extending in an axial direction, with magnets arranged at intervals in the axial direction, wherein each magnet and its spacing from an adjacent magnet constitute a magnet unit; and a rotor opposite the stator and linearly movable in the axial direction, with coil assemblies arranged side by side in the axial direction. Each coil assembly includes a core with an active portion wound with a coil and a supporting portion. Three coil assemblies have substantially the same length in the axial direction as four magnet units. When the length of each magnet unit is defined as 1, the length of each active portion is 0.3 to 0.5, and the height of each supporting portion, 0.28 to 0.38. These size ratios help increase the motor constant, lower the cogging force, and reduce positive attraction between the rotor and the stator.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 22, 2020
    Assignee: Chieftek Precision Co., Ltd.
    Inventors: Ming-Che Hsu, Hsuan-Chun Wu, Hsun-Han Liu
  • Patent number: 10666122
    Abstract: Provided is an impact type vibration actuator including a permanent magnet having a stopper insertion portion; a linear guide surrounding the permanent magnet; a stopper protruding into the linear guide and inserted into the stopper insertion portion; and coils provided on at least one end of the permanent magnet to provide alternately attraction and repulsion to the permanent magnet. According to the present invention, since a permanent magnet is not connected to the vibration mass, it is possible to adjust the vibration frequency in a very wide range by adjusting the frequency of the power source applied to the coil, and to adjust vibration intensity by appropriately selecting current intensity, a stopper interval, an elastic means, and the like. In addition, through this, it is possible to provide much more various haptic feedbacks than the prior art.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: May 26, 2020
    Assignees: IMAGIS CO., LTD., KOREA UNIVERSITY OF TECHNOLOGY AND EDUCATION INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Won Hyeong Park, Yong Jin Cho, Ho Pil Ahn, Eun Jae Shin, Sang Youn Kim
  • Patent number: 10658914
    Abstract: A magnetic balance guided linear vibration motor comprising a housing (1, 2), a vibrator, and a stator fixedly connected with the housing. The vibrator comprises a counterweight (31) and a vibrating block embedded and fixed in the counterweight, wherein a pair of first balancing magnets (61a, 61b) are respectively arranged on vertical sidewalls at two ends of the counterweight, second balancing magnets (62a, 62b) corresponding to the first balancing magnets are respectively arranged on the housing at positions corresponding to the two ends of the counterweight, and the second balancing magnets and the corresponding first balancing magnets are attracted to each other. The vibration motor provides the vibrator with vibration balance in a motor vibration space, overcomes the problem of wearing, deformation and balance error and the like due to motor mechanical balance means, and reduces motor noise, thus increasing the product quality and stability of the motor.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: May 19, 2020
    Assignee: GOERTEK INC.
    Inventors: Fenglei Zu, Chunfa Liu
  • Patent number: 10594199
    Abstract: An actuator (202) includes a stick-shaped center yoke (1) inserted through a cylindrical outer yoke (10), a support member that supports the outer yoke (10) such that the outer yoke (10) is linearly movable in an axial direction of the center yoke (1), a first coil (2), a second coil (3), and a third coil (4) wound around the center yoke (1), a first magnet array (11) and a second magnet array (12) disposed on an inner periphery of the outer yoke (10) in such a manner as to face the first coil (2), the second coil (3), and the third coil (4), a flat base plate (13) disposed at a first end portion of the center yoke (1), and a heat radiation member touching the base plate (13).
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: March 17, 2020
    Assignee: Azbil Corporation
    Inventor: Shigeru Kawase
  • Patent number: 10532891
    Abstract: For a flexibly configurable and easily expandable transport route of a long stator linear motor with transport route modules, it is provided that, in a two-sided route section with a transport route module on both sides, an intermediate space is provided between two transport route modules in transverse direction, and the transport unit is arranged at least partially in this intermediate space. In this way, a movement path is formed midway of this intermediate space in transverse direction that the transport unit follows during movement in longitudinal direction by the guidance on the transport route modules, and the movement path is arranged by the arrangement of the transport route module in transverse direction at a distance of (r·a) from the starting point and ending point, where r is an odd, whole number.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: January 14, 2020
    Assignee: B&R INDUSTRIAL AUTOMATION GMBH
    Inventors: Dominic Walter, Christoph Obermair, Stefan Huber
  • Patent number: 10530198
    Abstract: An R-T-B based sintered magnet includes a first main surface and a first side surface. The first main surface has a coercivity that is higher than that of the first side surface. ?HcjM?60 kA/m is satisfied, where ?HcjM is a difference in coercivity between a portion having a highest coercivity on the first main surface and a portion having a lowest coercivity on the first main surface. ?HcjG?60 kA/m is satisfied, where ?HcjG is a difference in coercivity between a portion having a highest coercivity on a first cross section and a portion having a lowest coercivity on the first cross section and the first cross section is a cross section parallel to the first main surface and spaced from the first main surface at a predetermined length or more.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 7, 2020
    Assignee: TDK CORPORATION
    Inventors: Naoto Tsukamoto, Hiroshi Miyasaka, Makoto Iwasaki, Takahiro Kawashima, Chikara Ishizaka
  • Patent number: 10505436
    Abstract: A reduction in thickness and a reduction in size in the width direction are enabled while enjoying the benefits of enabling stabilized vibration and superior physical shock durability through the provision of stationary shafts. The linear vibration motor comprises: a movable element that is equipped with a magnet portion and a weight portion; a frame for enclosing the movable element; a coil that is secured to the frame, for driving the magnet portion along the axial direction; an elastic member for applying, to the movable element, an elastic force for repelling the driving force that acts on the magnet portion; and a pair of guide shafts that is arranged along an axial direction, having one end secured to a frame and the other end supporting slidably the movable element.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: December 10, 2019
    Assignee: Nidec Copal Corporation
    Inventor: Yoshinori Katada
  • Patent number: 10411576
    Abstract: A primary for a linear induction motor having a core, electrical winding coils and a cooling system. The core extends longitudinally and has slots extending laterally in a first face thereof. Electrical winding coils inserted in the slots have end turns that extend laterally beyond each side of the core. The electrical winding coils are aligned sequentially along a length of the core. The cooling system, which is adapted to receive a cooling fluid, includes a serpentine tubing assembly and two lateral tubes. The serpentine tubing assembly is at least partially in contact with the core so as to transfer heat from the core to the environment. Each one of the two lateral tubes extend longitudinally along a different side of the core and within a respective longitudinal alignment of the end turns of the electrical winding coils.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: September 10, 2019
    Assignee: Bombardier Transportation GmbH
    Inventors: Peter Edward Timan, Evan Chou
  • Patent number: 10393548
    Abstract: A linear motor system that includes a field system in which magnets are arrayed such that polarities are alternately different, armatures, a magnetic detector which includes first, second and third hall elements, and in which an electrical angle phase of the third hall element is shifted from that of the first hall element by 90° and an electrical angle phase of the second hall element is shifted from that of the first hall element by 180°, and a calculator which calculates a first electrical angle from outputs of the first and the third hall elements, calculates a second electrical angle from outputs of the second and the third hall elements, and calculates an estimated value of an electrical angle by weighting is provided. An electrical angle with a larger amplitude between the first and the second electrical angles is multiplied by a relatively larger coefficient value.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: August 27, 2019
    Assignee: Murata Machinery, Ltd.
    Inventors: Tetsuya Shimizu, Yasutake Yamada, Kenji Kadoguchi, Shogo Terada
  • Patent number: 10374459
    Abstract: In one embodiment of a wireless power transmitter, two coils are magnetically coupled together by placing both coils on a magnetic layer. A power circuit generates an AC signal of a defined voltage magnitude that causes a current to flow through the first coil, which generates a magnetic field having a first polarity. The second coil is coupled to the first coil. Current flows through the second coil and generates a magnetic field having a second polarity that is opposite from the first polarity. Because the magnetic field generated by each coil has a different polarity, the magnetic fields attract and form a strong magnetic field that flows from the first coil to the second coil. The strong magnetic field can transfer greater amounts of power to a receiver in comparison to coil configurations that emit magnetic fields in the same direction that repel one another.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: August 6, 2019
    Assignee: CHARGEDGE, INC.
    Inventor: Sanjaya Maniktala
  • Patent number: 10326349
    Abstract: A magnet linear actuator includes a first element and an armature situated on a support, with the armature being movable along a movement axis between a first position engaged with the first element and the second position spaced away from the first element along the movement axis. The actuator further includes a biasing element that biases the armature in a direction generally toward the second position. The first element or the armature is pivotable with respect to the other between a first orientation and a second orientation. In the first orientation, the first element and the armature have a first magnetic attraction to one another that is sufficient to overcome the bias of the biasing element and to retain the armature in the first position. In the second orientation, the first element and the armature have either a magnetic repulsion to one another or a weaker second magnetic attraction.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 18, 2019
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Anthony T. Ricciuti, Mark A. Juds
  • Patent number: 10218252
    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: Grant
    Filed: June 9, 2010
    Date of Patent: February 26, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Yasuaki Aoyama, Yoshitaka Iwaji, Kohji Maki
  • Patent number: 10203584
    Abstract: Provided is controlling apparatus for an electric motor which is driven in accordance with a driving signal input through electric contacts held in slide contact with each other, the controlling apparatus including: a superimposed signal generating unit, which generates a superimposed signal having a peak voltage higher than a voltage of the driving signal; and a controlling unit, which generates the driving signal based on a controlling signal input so as to control the driving of the electric motor, and superimposes the superimposed signal onto the driving signal and output the resultant signal to the electric motor, the controlling unit superimposing the superimposed signal onto the driving signal and outputting the resultant signal to the electric motor when a state in which the driving signal is lower than a predetermined voltage continues for a time period which is longer than a predetermined time period.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: February 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Masaki Suzui
  • Patent number: 10128710
    Abstract: A linear compressor and a linear motor for a linear compressor are provided. The linear motor may include a first stator, a second stator spaced apart from the first stator, and at least one permanent magnet disposed between the first stator and the second stator. The first stator may include a bobbin around which a coil may be wound, and a plurality of core blocks that surrounds the bobbin. In at least one core block of the plurality of core blocks, a distance between a first surface that faces the second stator and a second surface of the second stator that faces the first surface varies in a circumferential direction of the second stator.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: November 13, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Jeonguk Byun, Eonpyo Hong, Jeehyun Kim
  • Patent number: 10103593
    Abstract: A linear motor has a tubular body and a rod that penetrates the tubular body in an axial direction, and is configured to displace the tubular body and the rod relative to each other in the axial direction. The linear motor includes: 12n+1 (where n is a positive integer) teeth arranged in the axial direction so as to project from an inner peripheral surface of the tubular body; 12n slots respectively formed between adjacent teeth of the plurality of teeth; 12n coils respectively disposed in the slots; and a plurality of permanent magnets held in the rod so as to be arranged in the axial direction. The respective coils are formed by being wound around an axis of the rod in an identical direction, and the number of permanent magnets positioned in the tubular body is set to 8n.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: October 16, 2018
    Assignees: NATIONAL INSTITUTE OF TECHNOLOGY, KYB Corporation
    Inventors: Yoshiaki Kano, Kousuke Sato, Noriyuki Takahashi
  • Patent number: 9878881
    Abstract: A propulsion system includes a magnetic screw having a first magnetic element having a first polarity, the first magnetic element arranged along a first non-linear path along a longitudinal axis of the magnetic screw and a second magnetic element having a second polarity, the second magnetic element arranged along a second non-linear path along the longitudinal axis of the magnetic screw; a motor for rotating the magnetic screw about the longitudinal axis; and a stator made from a ferrous material, the stator having a body with an internal cavity, the body including a plurality of poles extending into the cavity, the poles arranged along a pole non-linear path along a longitudinal axis of the stator.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: January 30, 2018
    Assignee: OTIS ELEVATOR COMPANY
    Inventor: Richard N. Fargo
  • Patent number: 9843249
    Abstract: An apparatus including an array of coils wherein each coil of the array of coils is wound around a core region for containing a fluid; an external magnet assembly mounted outside of the array of coils and movable over the array of coils; and an internal magnet assembly mounted inside the core region around which the coils of the array of coils are wound, wherein the internal magnet assembly is aligned with and magnetically coupled to the external magnet assembly so that the external and internal magnet assemblies move together along the array of coils in response drive signals applied to the coils within the array of coils.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: December 12, 2017
    Assignee: Nucleus Scientific Inc.
    Inventors: Ian W. Hunter, George C. Whitfield
  • Patent number: 9835222
    Abstract: The present invention relates to an actuator system with a magnetic lead screw, comprises a magnetic rotor and a translator cylinder, the translator cylinder comprises a magnetic stator, the translator cylinder has a closed first end and a second end confined by a lid, the lid having a shaft opening for a shaft coupled to the magnetic rotor, wherein the magnetic rotor, when inserted in the translator cylinder, is arranged to translate a linear movement of the translator cylinder into a rotational movement of the magnetic rotor by using magnetic flux interacting between the magnetic stator and the magnetic rotor, said rotational movements is being transferred through a shaft, the lid with a shaft opening arranged for receiving the shaft, wherein the shaft is arranged to make both the linear and the rotational movement in the shaft opening, the lid being arranged for confining the second end of the translator cylinder, the translator cylinder confined by the lid forms, when divided by the magnetic rotor, a firs
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: December 5, 2017
    Assignee: Aalborg Universitet
    Inventors: Nick Ilso Berg, Rasmus Koldborg Holm, Peter Omand Rasmussen
  • Patent number: 9277326
    Abstract: A miniature speaker is disclosed. The miniature speaker includes a frame providing a receiving space, a magnetic circuit positioned in the receiving space and a vibration unit including a diaphragm and a voice coil driving the diaphragm. The magnetic circuit includes a main magnet positioned on a center of the lower plate, a pair of auxiliary magnets positioned spaced from the main magnet for forming a magnetic gap, a pole plate attaching to a top surface of the main magnet, and an upper plate. The upper plate includes a pair of main segments attached to top surfaces of the auxiliary magnets, and a pair of connecting beams connecting with the main segments and located between the two auxiliary magnets. The magnets are prevent from being attracted to each other by virtue of the upper plate.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: March 1, 2016
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Yiming Meng, Guqing Zhang
  • Patent number: 9257872
    Abstract: A linear motor is provided. The linear motor includes a first member including a plurality of armature modules each comprising a magnetic core, a plurality of salient poles, and coils, where the coils are wound around a portion or all of the salient poles or the magnetic core between the salient poles; and a second member including one or more permanent magnet modules each including a plurality of permanent magnets each projected toward the magnetic core to be arranged between two salient poles of the armature module, where poles of the permanent magnets are alternated in a moving direction of the linear motor. Power is supplied to the coil of each armature module such that a thrust according to a traveling magnet fie is generated by using as one unit an S number of armature modules and a P number of permanent magnets arranged in the moving direction.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: February 9, 2016
    Inventor: Houng Joong Kim
  • Patent number: 9190893
    Abstract: A non-traditional topology of a superconductive electric motor or generator increases the air gap flux density by reducing stray flux and concentrating lines of flux within the air gap. An electric motor or generator utilizing the invention will include three components: a rotating armature, a permanent magnet stator and a shielding sleeve. The shielding sleeve of the motor is a hollow cylinder that fits between the armature and the stator, and is configured to cool a plurality of high-temperature superconductors within it to a temperature below their critical temperatures. These superconductors are placed at an optimized position to redirect flux and promote greater efficiency.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: November 17, 2015
    Assignee: Dominion Alternative Energy, LLC
    Inventors: Earl Enoch Fleck, Andrew Whitehead
  • Patent number: 9178401
    Abstract: An armature of a linear motor includes a plurality of cooling pipe storage holes formed along a longitudinal direction of a core, and a plurality of cooling pipes stored vertically in the cooling pipe storage holes and having a meander shape. The cooling pipes vertically adjacent to each other are arranged such that inlets and outlets of the cooling pipes are alternately connected in parallel to a refrigerant inlet and a refrigerant outlet in order to allow a refrigerant to flow in the reverse direction.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: November 3, 2015
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Satoshi Sugita, Yasushi Misawa, Shigenori Miyairi
  • Patent number: 9093888
    Abstract: There is provided a linear vibrator including a fixing unit having a magnet in an inner space of a certain size, the magnet generating magnetic force; a vibration unit including a coil disposed to face the magnet and generating electromagnetic force by interaction with the magnet, and a holder coupled with a surface of the coil and fixedly supporting a mass body which vibrates; and an elastic member coupled with the holder and the fixing unit and providing elastic force to the vibration unit.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 28, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Jun Kun Choi
  • Patent number: 9000627
    Abstract: Provided herein is a linear motor in which a back yoke can readily be mounted onto a linear motor body. The linear motor body is surrounded or wrapped by the back yoke that works to form part of a magnetic circuit of the linear motor body. The back yoke assembly includes first and second divided assemblies. The first and second divided assemblies have the same dimension and shape, and are each formed by press working a silicon steel plate or a magnetic plate made of SPCC material.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: April 7, 2015
    Assignee: Sanyo Denki Co., Ltd.
    Inventor: Yuqi Tang
  • 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
  • Patent number: 8994233
    Abstract: There is provided a movable iron core linear actuator, which includes a magnetic circuit (mc) which causes a moving element (2) to reciprocate. The magnetic circuit (mc) includes an iron core (20) constituting the moving element (2), a stator core (10) including a facing portion (10c) which faces the iron core (20), a pair of permanent magnets (12a, 12b) disposed in the facing portion (10c) along a reciprocating direction and having inverted magnetic poles at their surfaces which face the iron core, and a coil (11) wound around the stator core (10). Energization to coil (11) causes the moving element (2) to reciprocate. When the coil (11) is not energized, offset force (F4) is applied to the moving element (2) by the magnetic flux produced by the permanent magnets (12a, 12b).
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: March 31, 2015
    Assignee: Sinfonia Technology Co., Ltd.
    Inventors: Hiroshi Nakagawa, Takayoshi Fujii, Takashi Fukunaga
  • Patent number: 8981604
    Abstract: The invention provides an active element for an electromagnetic machine, the element comprising an alternating succession in a main direction of portions presenting a first magnetic property and of portions presenting a second magnetic property, wherein the element includes a non-magnetic covering that is thin relative to a thickness of the portions and that extends to cover a substantial fraction of an outside surface of the active element, the covering being secured to at least some of the portions and presenting sufficient strength to form a member for mechanically transmitting the magnetic forces to which the portions are subjected.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: March 17, 2015
    Assignee: Messier-Bugatti-Dowty
    Inventors: Nicolas Ziegler, Daniel Matt
  • Patent number: 8884746
    Abstract: An apparatus for generating tactile sensation by using a magnetic field, includes: a first magnet and a second one which are placed across a target as a subject to provide tactile sensation; and a first electromagnet placed between the target and the first magnet; wherein a strength of the whole magnetic field between the first and the second magnets is allowed to be adjusted by adjusting at least either of a direction and a strength of a magnetic field arising from the first electromagnet to control the strength of the force with which the target is pressed by the first and the second magnets. Because a magnet itself that generates a magnetic field without any complicated mechanical components may perform a function as an actuator that generates tactile sensation, the apparatus for generating tactile sensation may become simple, light and compact.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: November 11, 2014
    Assignee: Center Of Human-Centered Interaction For Coexistence
    Inventors: Jai Hi Cho, Joung Huem Kwon, Shin Young Kim, Bum Jae You
  • 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
  • Publication number: 20140319935
    Abstract: A mover and stator assembly of an electric machine includes at least one stator and at least one rotor. Each stator includes multiple magnetic components each including a first surface and a salient portion protruding from the first surface. The rotor includes multiple second magnetic components each including a second surface and a groove located on the second surface. The first surfaces face the second surfaces, and the width of each salient portion is less than that of each groove.
    Type: Application
    Filed: December 31, 2013
    Publication date: October 30, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Cheng-Hsuan Lin, Han-Ping Yang, Wen-Yang Peng, Chau-Shin Jang
  • Patent number: 8861776
    Abstract: The invention relates to an electromechanical conversion system comprising: a fixed supporting structure, a movable element with respect to the fixed structure; at least one excitation coil; and at least one permanent magnet for generating an excitation magnetic field. The permanent magnet is integral with the movable element and the coil is integral with the fixed supporting structure. Moreover, a ferromagnetic circuit is provided fixed with respect to the structure and cooperating with the permanent magnet.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: October 14, 2014
    Inventor: Claudio Lastrucci
  • 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
  • Publication number: 20140300213
    Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: L-3 Communications Cincinnati Electronics Corporation
    Inventor: Andreas Fiedler
  • Publication number: 20140265647
    Abstract: An electromagnetic device includes discrete wires for its poles or teeth. In another aspect, an electromagnetic device includes a stator unit and an adjacent movable unit, at least one of which includes magnetic flux-carrying poles, with a majority of each pole including multiple discrete wires. In another aspect, the movable unit is an electric motor rotor, a linear electric motor armature, a solenoid armature, or an electric generator rotor.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: Board of Trustees of Michigan State University
    Inventor: Norbert Müller
  • 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
  • Publication number: 20140270328
    Abstract: An apparatus includes at least one load and a plurality of armatures, each including a permanent magnet, which are coupled to the at least one load to cause the at least one load to move. The apparatus also includes a common stator that defines an air gap within which the plurality of armatures is disposed. The common stator is configured for creating magnetic flux across the air gap for the armatures to interact with, thereby to drive motion of the at least one load.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Brian M. Lucas, Johan H. Isaksson, Geoffrey C. Chick
  • 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: 8786831
    Abstract: A positioning apparatus includes a moving member, an actuator, and a controller. The moving member can move in at least a first direction. The actuator is provided along the first direction. The controller controls a current applied to the actuator in order to support the weight of the moving member. The bending rigidity of the moving member in the first direction is greater than the bending rigidity of the moving member in a second direction perpendicular to the first direction.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: July 22, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tosiya Asano, Yugo Shibata, Atsushi Kimura
  • Publication number: 20140159512
    Abstract: A stator structure includes a main body having multiple frames each having an arc panel, a main tooth, at least one secondary tooth, at least one main coil and at least one secondary coil. The main tooth and the secondary tooth are disposed at one face of the arc panel. The main coil is installed at the main tooth, and the secondary coil is installed at the secondary coil. A rotor is penetrated through the stator structure. The frames are in a multi-layer circular arrangement at the rotor, and a dislocation angle exists between the frame at any layer and the frame at the neighboring layer.
    Type: Application
    Filed: April 17, 2013
    Publication date: June 12, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Min-Fu Hsieh, Wan-Yu Wu, Hui-Chun Ho, Yee-Pien Yang
  • Patent number: 8723376
    Abstract: A mover, in which at each outer surface of a cornered tubular inner yoke, a flat plate magnet magnetized from inside to outside in a direction perpendicular to the outer surface, a flat plate magnet magnetized in an axial direction of the inner yoke, a flat plate magnet magnetized from outside to inside in the direction perpendicular to the outer surface, and a flat plate magnet magnetized in the axial direction of the inner yoke are alternately provided in this order, is passed through an armature in which a first single pole unit and a second single pole unit rotated by 90° with respect to the first single pole unit are alternately stacked, thus forming a linear motor. Windings are collectively wound around core portions of the first single pole unit. Positions of the magnets provided at the outer surfaces of the inner yoke are deviated from each other.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: May 13, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventor: Makoto Kawakami
  • Patent number: 8723375
    Abstract: A linear actuator includes a coil portion and a shaft portion. The coil portion includes a plurality of coils respectively applied with AC currents having different phases from one another. The shaft portion passes through an inside of the plurality of coils. The shaft portion includes: a plurality of permanent magnets and a plurality of intermediate members. The plurality of permanent magnets is arranged along a central axis C such that opposite magnetization directions face to each other in a direction of the central axis C. Each of the plurality of intermediate members is arranged between adjacent two of the plurality of permanent magnets. A saturation magnetic flux density of each of the plurality of intermediate members is higher than a saturation magnetic flux density of each of the plurality of permanent magnets.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: May 13, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., Osaka University
    Inventors: Ryota Hiura, Takakatsu Nozawa, Katsuhiro Hirata, Hiroshi Ishiguro, Yoshihiro Nakata
  • Publication number: 20140084709
    Abstract: A strip stator including: a strip stator core; a plurality of upper end insulation groups; and a plurality of lower end insulation groups. The stator core includes two ends. Each upper end insulation group includes at least two upper end insulations connected together by injection molding. Each lower end insulation group includes at least two lower end insulations connected together by injection molding. The upper end insulation groups and the lower end insulation groups are arranged on the two ends of the strip stator core, respectively.
    Type: Application
    Filed: March 16, 2013
    Publication date: March 27, 2014
    Applicant: Zhongshan Broad-Ocean Motor Manufacturing Co., Ltd.
    Inventor: Zhongshan Broad-Ocean Motor Manufacturing Co., Ltd.
  • Patent number: 8653709
    Abstract: This disclosure discloses a rotating electrical machine comprising: a stator; and a rotor; one of said stator and said rotor having a coil, the other having a plurality of magnetic pole units each forming first and second magnetic poles configured to be aligned alternately and to have mutually opposite polarities at a side of the one of said stator and said rotor, each of said magnetic pole units comprising: a unit core that a projecting part configured to protrude toward the side of the one of said stator and said rotor is formed; and a permanent magnetic provided between each of said projecting parts on the side of the one of said stator and said rotor from said unit core, said first magnetic pole being formed by said permanent magnet, and said second magnetic pole being formed by each of said projecting parts.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: February 18, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yasuhiro Miyamoto, Hiroshi Tsumagari, Daisuke Morishita
  • Patent number: 8643228
    Abstract: A linear motor for optical systems, for example, endoscopes, is described. The motor has a stator with a magnetic guiding member and two adjacently disposed coils which are energized in opposite directions. Furthermore permanent magnets polarized in opposite directions and in the axial direction are provided on both sides of the pair of coils. The armature of the motor has a permanent magnet which is polarized in the opposite direction to the permanent magnet of the stator and is connected to a pole piece at each end. The pole pieces are arranged so that in the rest position each pole piece lies at the centre of one of the coils. By applying current to the coil, the armature can be displaced from a rest position in the longitudinal direction.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 4, 2014
    Assignee: Karl Storz GmbH & Co. KG
    Inventor: Walter Vogel
  • 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: 8618702
    Abstract: A vibration energy generator includes a case, a coil, a permanent magnet, and a shield magnet. The case is elongated in one direction and is made from a nonmagnetic material. The coil surrounds around an outer surface of the case. The permanent magnet reciprocates inside the case along the one direction. The permanent magnet is magnetized with a polarity oriented in the one direction. The shield magnet is disposed in one end portion of the permanent magnet in the one direction. Each of a surface of the one end portion and a surface of the shield magnet facing the surface of the one end portion has the same magnetic polarity. The length of the shield magnet in the one direction is less than the length of the permanent magnet in the one direction.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: December 31, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Ryuta Iijima
  • Patent number: 8607504
    Abstract: A stator element is disclosed for an electrical driving of a slidable body, such as a sliding door. Such a sliding door and a method for displacing thereof are also disclosed. In at least one embodiment, he stator element includes an elongate holder; a number of carrier elements arranged adjacently of each other and connected to the holder, wherein the carrier element includes a number of plate-like strips; and at least one winding arranged round each carrier element, wherein during use the winding is connected to a voltage source for the purpose of generating an electromagnetic field which during use is operatively connected to at least one counter-element in the form of a magnet or magnetizable element provided on the slidable body.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: December 17, 2013
    Assignee: Kone Corporation
    Inventor: Petrus Johannes Maria Peeters Weem
  • Publication number: 20130237751
    Abstract: A linear actuator is disclosed, that comprises a stator containing more than one coil, a mover containing more than one magnet, each said magnet separated from the adjacent magnet by a spacer, a power supply operable to provide current to said coils of said stator, at least one magnetic flux sensor, and a controller operable to control the relative motion between said stator and said mover, the controller comprising a module to measure the magnetic flux observed by the sensor and use that as feedback to control the motion of the mover relative to the stator. In a preferred embodiment, this linear actuator is used in a sexual appliance with user control over the linear actuator motion profiles.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Inventor: Taylor Lawrence Alexander