Patents Examined by Thomas Truong
  • Patent number: 9837884
    Abstract: A linear motor includes an excitation unit including a shaft and a plurality of permanent magnets located in the shaft, and an armature including a plurality of coils surrounding the excitation unit and a magnetic cover covering the coils. The plurality of coils of the same phase group are continuously wound over a plurality of insulative bobbins. A tap conductor, a jumper wire between the coils, and a terminal wire of the coils in different phase groups that are continuously wound are separately disposed in different corner portions in the magnetic cover, and the terminal wire of each phase is connected to a circuit board.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 5, 2017
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Yuqi Tang, Takashi Matsushita
  • Patent number: 9837883
    Abstract: Provided is an electric motor combined with a power generator comprising: a fixed coil plate in which separate coil bodies are uniformly arranged; and a reciprocating magnet plate in which separate magnets are uniformly arranged. The installation location of the electric motor combined with a power generator is not restricted by linearly or rotationally moving equipment. In addition, the electric motor combined with a power generator enables coils and magnets to be regularly and closely arranged in the coil plate and the magnet plate, thereby minimizing loss of the locomotive force. Furthermore, when performing a reciprocating movement to which an inertial force is added, the electric motor combined with a power generator enables electric current to be instantly broken and converted and supplied by sensing of sensors, while implementing a strong reciprocating movement due to an increase of speed by means of the compression and repulsive force of a spring.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: December 5, 2017
    Inventor: Sukho Jang
  • Patent number: 9825508
    Abstract: A linear motor device includes a track member with multiple magnets with alternating N poles and S poles arranged along the moving direction, and a moving body with a configuration which includes an armature which is movably mounted on the track member; and the device generates a driving force in the moving direction between the magnetic flux created armature and the magnets of track member. The armature also includes a heat conduction member arranged in cooling passages formed in cores of the armature. By this, coils on the moving body side are cooled efficiently, and a large driving force can be achieved by passing a large current as well as maintaining a large space for winding the coils in order to increase the winding count.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: November 21, 2017
    Assignee: FUJI MACHINE MFG. CO., LTD.
    Inventors: Makoto Kainuma, Ryo Nagata, Masatoshi Fujita, Shuhei Yamada
  • Patent number: 9819287
    Abstract: A method of imparting motion includes contracting a portion of a magnetic shape memory (MSM) element in response to a magnetic field to form an indentation on a surface of the MSM element. The method further includes retaining a protrusion from a surface of a movable part at the indentation. The method also includes moving the movable part by changing a position of the indentation in response to a change in the magnetic field.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: November 14, 2017
    Assignee: BOISE STATE UNIVERSITY
    Inventor: Peter Mullner
  • Patent number: 9819237
    Abstract: A rotor of a wind turbine large-diameter rotary electric machine has a hub configured to rotate about an axis of rotation; a tubular structure extending about the hub and supporting a plurality of active segments arranged about the axis of rotation; and a radial structure configured to connect the hub to the tubular structure, which is divided into a plurality of sectors connectable selectively to the radial structure.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: November 14, 2017
    Assignee: WINDFIN B.V.
    Inventors: Matteo Casazza, Paolo Bustreo, Mattia Scuotto
  • Patent number: 9812909
    Abstract: A method and apparatus for reducing or eliminating the effects of torque ripple and cogging torque and otherwise improving performance in an electromechanical machine such as a motor or generator. The rotor and/or stator is conceptually sectionalized and the sections spaced apart by amount sufficient to alleviate deleterious aspects of cogging torque and torque ripple. Positioning of the stator teeth or rotor magnets is determined based on the calculated spacing. Conceptual sections may be formed as physically individual segments. Unwound teeth may be disposed in end spaces between sections occupying less than the entire area of the end space.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: November 7, 2017
    Assignee: WEG Electric Corp
    Inventors: Jeffrey K. Petter, Hector Hurtado
  • Patent number: 9812914
    Abstract: A rotor according to the present invention includes a rotating axis rotating about an axial center of the rotating axis and a rotor component member including an inner circumferential surface on which an outer circumferential surface of the rotating axis fits. The outer circumferential surface of the rotating axis and the inner circumferential surface of the rotor component member include corresponding tapered surfaces each having a diameter that varies in taper along the axial center, the tapered surfaces being in full contact with each other while the outer circumferential surface of the rotating axis is press-fitted relative to the inner circumferential surface of the rotor component member, and at least one of the tapered surfaces has a corrugated surface structure storing a lubricant before the rotating axis is press-fitted relative to the rotor component member, while configured to wear away by press-fitting the rotating axis relative to the rotor component member to discharge the lubricant.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: November 7, 2017
    Assignee: FANUC CORPORATION
    Inventors: Kenji Kawai, Shinobu Takano, Yohei Arimatsu
  • Patent number: 9806591
    Abstract: A linear motor is disclosed. The linear motor includes an armature mounted for driven linear oscillation substantially along a longitudinal direction; a secondary mass mounted for linear oscillation substantially along the longitudinal direction; and a coupling unit for coupling the armature and the secondary mass. The coupling unit includes at least two coupling spring assemblies and at least a coupling element, the coupling spring assemblies being arranged in planes perpendicular to the longitudinal direction and being spaced apart from each other, and the coupling element being fixedly connected with the coupling spring assemblies.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: October 31, 2017
    Assignee: BRAUN GMBH
    Inventors: Uwe Schober, Frank Ziegler, Robert Schaefer
  • Patent number: 9806581
    Abstract: A rotor for a motor comprising a frame having a hub for connecting the rotor to a shaft and a perimeter portion for interacting with a stator of the motor to cause the rotor to rotate about an axis of rotation. The frame comprises legs extending from an outer portion of the frame towards the hub, each leg having an inner end at the hub and an outer end at the outer portion of the frame, the inner ends of a first plurality of legs being spaced from the inner ends of a second plurality of legs in a direction along the axis of rotation.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: October 31, 2017
    Assignee: FISHER & PAYKEL APPLIANCES LIMITED
    Inventors: Gregory Paul Hill, Russell Joseph Jackson
  • Patent number: 9800102
    Abstract: A motor includes a stator, a rotor and a case. The rotor includes a first rotor core, a second rotor core, and a field magnet. Each of the first rotor core and the second rotor core includes a core base and a plurality of claw poles. The field magnet is located between the core bases. The case includes a cylindrical yoke housing and a lid. To balance magnetic flux from the first rotor core with magnetic flux from the second rotor core, the distance between the rotor and the stator is varied from the distance between the rotor and the yoke housing or the teeth of the stator are shaped to enable magnetic saturation.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: October 24, 2017
    Assignee: ASMO CO., LTD.
    Inventor: Koji Mikami
  • Patent number: 9800118
    Abstract: A self-cooled motor includes a shaft; a rotor; a stator radially opposite the rotor; a housing supporting a bearing and the stator; and an impeller located axially below the rotor, and configured to rotate together with the shaft to generate an air current. The housing includes a base portion located axially above the rotor; two or more attachment portions radially outward of the rotor; and a cylindrical or substantially cylindrical cover portion configured to join the base portion and the attachment portions. A lower end of each attachment portion is located at an axial level lower than an axial level of the impeller. The base portion includes an air inlet. The cover portion includes an air outlet located between adjacent ones of the attachment portions, and configured to connect a space radially inside the housing and a space radially outside the housing with each other.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: October 24, 2017
    Assignee: NIDEC CORPORATION
    Inventor: Yusuke Iwai
  • Patent number: 9800117
    Abstract: A self-cooled motor includes a rotor holder including a cylindrical portion and a bottom plate portion, and configured to rotate with a shaft; a housing supporting a bearing and a stator; and at least one blade rotating together with the shaft to generate an air current traveling radially outward, at least a portion of each blade being located axially below the bottom plate portion of the rotor holder. The housing includes a base portion axially above the rotor holder and an outlet edge portion in the housing and between adjacent ones of the attachment portions, and configured to define a main air outlet axially below, the main air outlet connecting a space radially inside the housing and a space radially outside the housing with each other. The bottom plate portion of the rotor holder includes a rotor vent hole passing therethrough in an axial direction.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: October 24, 2017
    Assignee: NIDEC CORPORATION
    Inventor: Yusuke Iwai
  • Patent number: 9800100
    Abstract: A permanent magnet motor includes: a stator including: a stator core in which teeth are respectively arranged circumferentially so as to protrude radially inward from an annular core back; an armature winding that is mounted to the stator core; and a frame that holds the stator core in an internally fitted state; and a rotor that includes a rotor core and permanent magnets, the armature winding being constituted by a plurality of coils that are respectively wound so as to be concentrated on the teeth, wherein: inner circumferential ends of adjacent teeth are connected together by a connecting portion; and 0.122?(t2+t3)/r4?0.202 is satisfied, where t2 is a thickness of the core back, t3 is a thickness of the frame, and r4 is an outside radius of the frame.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: October 24, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masatsugu Nakano, Yu Hirotani, Hiroko Ueyama, Ryuichi Takiguchi
  • Patent number: 9793771
    Abstract: An electric motor rotor including a magnetic core, magnets fastened to the periphery of the magnetic core, and a wire wound with touching turns around the magnetic core and the magnets. The wire includes a metal core surrounded by an electrically insulating layer, itself covered by an outer sheath of thermo-adhesive material, the turns being fastened to one another by adhesion between mutually contacting portions of the outer sheath. A method of fabricating such a rotor. An electric motor including such a rotor.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: October 17, 2017
    Assignee: Safran Electronics & Defense
    Inventors: Bernard Rabret, Bruno Andre, Gaetan Princay, Jerome Piaton, Thierry Bessede
  • Patent number: 9787153
    Abstract: An outer rotor type dynamo has a first magnet and a second magnet which are disposed apart from each other in the axial direction, a first stator yoke disposed facing the inside of the first magnet with a gap, a second stator yoke disposed faced the inside of the second magnet with a gap, a hub shaft which magnetically connects the first stator yoke and the second stator yoke, a comb-like yoke in which both end portions of a plurality of projection pieces extending along the axial direction face different magnetic poles with respect to the first magnet and the second magnet, a bobbin disposed between the first stator yoke and the second stator yoke, and a coil wound around the bobbin.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 10, 2017
    Assignee: Ichinomiya Denki Co., Ltd.
    Inventor: Yoshikazu Kinashi
  • Patent number: 9788465
    Abstract: An actuator apparatus is described as having a stator device, a cover device, a contact device and an attenuation device. The stator device and the cover device are joined in such a manner so that a hollow space is formed between the stator device and the cover device. The cover device has an opening, through which the contact device is guided into the hollow space, so that the contact device runs at least partially in the hollow space and at least partially in the cover device. The attenuation device is positioned in the opening in such a manner so that a high-frequency electromagnetic radiation that travels through the opening is more highly attenuated by the attenuation device than the radiation would be attenuated without the presence of the attenuation device.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: October 10, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Martin Haas, Jochen Huebl, Roland Mager
  • Patent number: 9787165
    Abstract: A motor includes an armature core having m×n teeth (m is an odd number ?3, and n is a natural number ?2), a plurality of coils, and a commutator. The motor further includes field magnets including 2n magnetic poles and at least a first-potential brush and at least a second-potential brush. The commutator includes a segment group defined by 2m×n segments. Only the coil defined by winding a continuous conducting wire in a predetermined winding direction is disposed in each of k teeth among the m×n teeth, and only the coil defined by winding the continuous conducting wire in a direction reverse to the predetermined winding direction is disposed in each of teeth disposed at a position separated from each of the k teeth at 360×i degrees (i is a natural number ?(n?1)) of electric angles.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: October 10, 2017
    Assignee: NIDEC CORPORATION
    Inventors: Naohiro Hashizume, Yusuke Makino, Takahiro Hiwa, Shohei Osuga
  • Patent number: 9768654
    Abstract: A motor, including at least a stator, including at least a stator core and a coil winding, and a rotor, including at least a rotor core and multiple permanent magnets. Multiple wire receiving grooves are disposed on the stator core. The permanent magnets are disposed on the rotor core. The ratio between the number of teeth of the wire receiving grooves and that of the permanent magnets is 3:2. Every two or three of the permanent magnets form a group of permanent magnets. A gap is disposed between adjacent groups of permanent magnets. The groups of permanent magnets are circumferentially distributed. Magnetic polarities of the permanent magnet are alternatively distributed in a N phase and a S phase. Difference in an electric angle between centers of polarities of adjacent permanent magnets in one group is between 150 degrees and 170 degrees.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 19, 2017
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR MANUFACTURING CO., LTD.
    Inventor: Mingpan Pan
  • Patent number: 9762112
    Abstract: Provided are an actuator capable of easily aligning the center axis of an entire apparatus including a mover and a stator, and a method of manufacturing the actuator. The actuator includes a mover unit which includes a mover having a magnetic field part attached to a peripheral surface of center part of a shaft, bearing parts provided on both end parts of the shaft, a cylindrical body which houses the center part of the shaft and the magnetic field part therein, and has both end parts connected to the bearing parts. A stator in which coils are wound on a core and case bodies are fixed to each other by screws, and then the mover unit is inserted into a fixed body of the stator and the case bodies from an opening side of the case body.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: September 12, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Junichi Sutani, Yoshinobu Nakamura
  • Patent number: 9755553
    Abstract: A paper-base flexible power-generation apparatus, and a manufacturing method thereof. The flexible power-generation apparatus comprises: a first assembly (1) formed by a paper-base insulation layer (11) and a first metal conductive layer (12) deposited on the surface of the paper-base insulation layer, and a second assembly (2) formed by a paper-base insulation layer (21), a second metal conductive layer (22) deposited on the surface of the paper-base insulation layer, and an electret material layer (23) coating on the surface of the second metal conductive layer. The two edges of the two assemblies are each provided with an electrode (13, 24) and the electrodes are connected through a packaging process. The first metal conductive layer is opposite to and spaced from the electret material layer. The flexible power-generation apparatus has a low cost, is easy to manufacture, has high output power, and is especially suitable for being integrated with other flexible electronic devices.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: September 5, 2017
    Assignee: Huazhong University of Science and Technology
    Inventors: Jun Zhou, Qize Zhong, Junwen Zhong, Bin Hu, Qiyi Hu