Hollow (e.g., Double Air Gap) Patents (Class 310/266)
  • Patent number: 10651702
    Abstract: A high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency ? caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in magnetic body.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: May 12, 2020
    Assignee: CORELESS MOTOR CO., LTD.
    Inventors: Manabu Shiraki, Tsutomu Shiraki
  • Patent number: 10637319
    Abstract: Present invention relates to a high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency ? caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in magnetic body.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: April 28, 2020
    Assignee: CORELESS MOTOR CO., LTD.
    Inventors: Manabu Shiraki, Tsutomu Shiraki
  • Patent number: 10612179
    Abstract: A washing machine comprises an outer tub, an inner tub, a pulsator and a driving means having two rotors, a stator and a deceleration mechanism. One rotor drives the pulsator, and the other rotor drives the inner tub. During washing, the two rotors drive the pulsator and the inner tub to rotate in the same or opposite directions, and during dehydration, the pulsator and the inner tub rotate in the same direction and at the same speed. The automatic washing machine saves on energy consumption, has stable output and has high transmission efficiency.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: April 7, 2020
    Assignee: QINGDAO HAIER WASHING MACHINE CO., LTD.
    Inventors: Peishi Lv, Sheng Xu, Lin Yang
  • Patent number: 10570918
    Abstract: A fan includes a fan housing and a motor accommodated therein. The motor has a stator and a rotor, which is connected to a fan wheel. The fan housing consists of at least a housing upper part and a housing lower part. The housing upper part has an axial opening on the axial inner face of which facing the housing lower part the stator is arranged. On the axial outer face of the axial opening at least electronics are arranged.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: February 25, 2020
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventors: Malte Pils, Thomas Heli, Peter Riegler, Jörg Günther
  • Patent number: 10556617
    Abstract: The present invention relates to a steer-by-wire and independent-drive integrated wheel-side electric drive device, including a first double-rotor motor and a second double-rotor motor, fixedly arranged coaxially along an axial direction of a motor, an inner rotor of the first double-rotor motor is connected with a first drive shaft and is used for driving a wheel on one side to rotate; an inner rotor of the second double-rotor motor is connected with a second drive shaft and is used for driving a wheel on the other side to rotate; an outer rotor of the first double-rotor motor and an outer rotor of the second double-rotor motor are respectively connected with a driving gear by virtue of an output shaft.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: February 11, 2020
    Inventors: Junnian Wang, Dedong Guo, Zheng Luo
  • Patent number: 10556496
    Abstract: A power train apparatus may include an engine including a crankshaft and an engine block, a motor housing connected to the engine block and of which a housing opening is formed, a rotor portion connected to the crankshaft through the housing opening, of which a magnet is connected to a first side thereof and the rotor portion to which a balance portion is formed for compensating for imbalance rotational energy transmitted from the crankshaft; a stator portion disposed between the rotor portion and the motor housing and connected to the motor housing and a transmission connected to the engine block.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: February 11, 2020
    Assignee: Hyundai Motor Company
    Inventors: You Sang Son, Ingee Suh, Jae Bum Park, Kyoung Pyo Ha, Jeong Soo Eo, Back Sik Kim, Yeonho Kim
  • Patent number: 10538156
    Abstract: A power train may include an engine having a crankshaft and an engine block, a motor housing connected to the engine block and of which a housing hole is formed, a rotor portion connected to the crankshaft through the housing hole and of which a magnet is connected to a first side thereof, a stator portion disposed between the rotor portion and the motor housing, connected to the motor housing and including a coil corresponding to the rotor portion, a transmission connected to the engine block and a clutch selectively transmitting rotation of the rotor portion to the transmission.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: January 21, 2020
    Assignee: Hyundai Motor Company
    Inventors: You Sang Son, Ingee Suh, Jae Bum Park, Kyoung Pyo Ha, Jeong Soo Eo, Back Sik Kim, Yeonho Kim
  • Patent number: 10367398
    Abstract: A double-stator switched reluctance motor includes an annular rotor, an outer stator disposed outside the rotor, and an inner stator disposed inside the rotor. Phases of the salient poles in a rotational direction of the rotor are different from each other in at least one of a set of first stator salient poles and second stator salient poles and a set of first rotor salient poles and second rotor salient poles.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: July 30, 2019
    Assignee: IHI CORPORATION
    Inventors: Narifumi Tojima, Takehiro Jikumaru, Norihisa Handa, Koshi Ishimoto, Gen Kuwata, Satoru Ohashi, Toshiyuki Hirao
  • Patent number: 10270300
    Abstract: A multiphase motor is provided. The motor includes a rotor rotatable about an axis and a sectioned stator. The sectioned stator includes one or more stator sections. Each stator section has a core section including a yoke and a plurality of arcuately spaced apart teeth that extend generally radially from the yoke. The stator includes a plurality of electrically conductive wire windings. Each of the windings corresponds with a respective power phase. Each stator section is wound with each of the windings such that each stator section includes windings for all of the power phases.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: April 23, 2019
    Assignee: Nidec Motor Corporation
    Inventor: Keith I. Hoemann
  • Patent number: 10214089
    Abstract: An energy efficient vehicle is provided. Wheels are disposed on the front and rear sides of the car body. A gasoline engine in the car body is used to drive an electricity generator to produce electric energy transferred to a capacitive battery, and then to a multi-loop disc-type dynamic motor. The multi-loop disc-type dynamic motor drives the car by rotating the wheels through a transmission and a differential. The multi-loop disc-type dynamic motor can produce large torque and horsepower through multiple stator rings disposed on a stator base and multiple permanent magnetic sheets disposed on the multiple annular ribs of a rotor base. Therefore, the electricity can be saved to elevate the endurance of the vehicle, and the vehicle does not need to stop for charging.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 26, 2019
    Inventors: Richard Chi-Hsueh, Chung-Yeh Hsu
  • Patent number: 10186921
    Abstract: A stator of a rotary electric machine includes a stator core and a coil. The stator core includes slots extending in an axial direction of the stator core and a first axial end surface in the axial direction. The coil is attached to the stator core and includes slot coils disposed in the slots and connection coils. At least one of the slot coils includes a slit in a part positioned in a slot among the slots. The slit extends through the at least one of the slot coils from a first axial end side of the stator core toward a second axial end side of the stator core opposite to the first axial end side in the axial direction. The connection coils are connected to the slot coils at a contact portion at a position outward from the first axial end surface in the axial direction.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: January 22, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tadanobu Takahashi, Tomotaka Iki, Kentaro Nagahiro
  • Patent number: 10056799
    Abstract: A coil group 23G is composed of windings 23U to 23W for U phase, V phase, and W phase. One ends 23U1 to 23W1 of the windings for the respective phases composing the coil group 23G are connected to respective power supply bus bars 25U to 25W, and the other ends 23U2 and 23W2 of the windings for the phases positioned at both ends in the circumferential direction in the coil group 23G extend toward the other end 23V2 of the winding for the rest of the phases, whereby the other ends 23U2 to 23W2 of the windings for the respective phases are mutually connected.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 21, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shogo Okamoto, Ken Nishikawa, Masashi Nakamura, Akihiro Yamamura, Kota Hirohashi, Yoshiki Kuwahara
  • Patent number: 9985487
    Abstract: Disclosed herein is a rotor for motor including a rotor tube disposed inside a stator, a rotor core that is formed on a circumferential surface of the rotor tube and integrally formed with the rotor tube, and magnets coupled to the rotor core. The rotor for motor provides an advantageous effect of preventing the deformation of the rotor tube in the process of assembling the rotor tube and the rotor core.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: May 29, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Kyung Sang Park, Seong Jin Kim, Jin Ho Kim, Chang Hyun Park, Woo Seob Shim
  • Patent number: 9979267
    Abstract: A double-stator rotating electric machine includes a rotor and a pair of outer and inner stators. The outer stator has a first multi-phase coil wound thereon so as to form magnetic poles upon energization of the first multi-phase coil. The inner stator has a second multi-phase coil wound thereon so as to form magnetic poles upon energization of the second multi-phase coil. The number of the magnetic poles formed by the outer stator is equal to the number of the magnetic poles formed by the inner stator. Each of the magnetic poles formed by the outer stator is located at the same circumferential position as and has an opposite polarity to a corresponding one of the magnetic poles formed by the inner stator. The rotor has yoke portions each of which radially extends so as to form a magnetic flux passage magnetically connecting the outer and inner stators.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: May 22, 2018
    Assignee: DENSO CORPORATION
    Inventors: Shin Kusase, Keiji Kondou, Takeo Maekawa
  • Patent number: 9859763
    Abstract: The disclosure relates to printed circuit board motors and specifically to printed circuit boards used in motors and generators. Windings formed from copper on printed circuit boards have been used for purposes of forming antennas, inductors, transformers, and stators that can be incorporated in permanent magnet brushless DC (permanent magnet synchronous) machines. For energy conversion devices using modern permanent magnet materials and PCB stators, the magnetic field is not strongly confined by magnetically susceptible materials. Thus, the interaction between fields from adjacent turns in a winding, and/or windings on adjacent layers (for a multilayer configuration) may be significant. The structures disclosed hereinafter reduce the effective resistance in the windings, and therefore reduce the associated losses to achieve a reduced current density in portions of the rotating energy conversion devices.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: January 2, 2018
    Assignee: E-Circuit Motors, Inc.
    Inventor: Steven Robert Shaw
  • Patent number: 9800109
    Abstract: The disclosure relates to printed circuit board motors and specifically to printed circuit boards used in motors and generators. Windings formed from copper on printed circuit boards have been used for purposes of forming antennas, inductors, transformers, and stators that can be incorporated in permanent magnet brushless DC (permanent magnet synchronous) machines. For energy conversion devices using modern permanent magnet materials and PCB stators, the magnetic field is not strongly confined by magnetically susceptible materials. Thus, the interaction between fields from adjacent turns in a winding, and/or windings on adjacent layers (for a multilayer configuration) may be significant. The structures disclosed hereinafter reduce the effective resistance in the windings, and therefore reduce the associated losses to achieve a reduced current density in portions of the rotating energy conversion devices.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: October 24, 2017
    Assignee: E-Circuit Motors, Inc.
    Inventor: Steven Robert Shaw
  • Patent number: 9800111
    Abstract: This invention presents a highly efficient electric motor which can be embodied in several configurations, including a standard motor, a hub motor, a linear motor, or other motor configuration. As a regenerative device, the motor may also act as a part-time or full-time electrical generator. There is provided a motor composed of a stator and a rotor. The stator has an array of coils arranged therein. The rotor has an array of magnets arranged therein. Each of the coils includes a first winding of wire wrapped around a core, and the wire has a non-circular cross-section. The wire can be a flattened wire.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: October 24, 2017
    Assignee: Millennial Research Corporation
    Inventors: Denis L. Palmer, Robert A. Palmer, Jr., Damian Riddoch, Edward Butler, Charles Palmer
  • Patent number: 9780609
    Abstract: A superconducting synchronous motor having a simple and stable structure is provided. The superconducting synchronous motor according to one embodiment of the present invention comprises: a rotary shaft; a rotation core mounted at the rotary shaft so as to be rotated by connecting with the rotary shaft; and hooked magnetic poles extending from one end of the rotation core in a longitudinal direction. Each of the hooked magnetic poles is composed of first and second inductors of a magnetic material alternately engaged with each other and a superconducting wire to be wound, and comprises a first superconducting field winding and a second superconducting field winding fixed closely at the other end of a first inductor rotation core and the other end of a second inductor rotation core, respectively. Each of the first superconducting field winding and the second superconducting field winding excites the first inductor and the second inductor to different poles.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: October 3, 2017
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Tae Kuk Ko, Young Jin Hwang, Jin Bae Na, Sukjin Choi, Hyun Chul Jo, Jae Young Jang, Hyung Jun Kim, Jiho Lee
  • Patent number: 9709508
    Abstract: There is provided a method for inspecting a laminated iron core structured by laminating a plurality of iron core pieces-having a predetermined shape and including therein a cooling flow path allowing refrigerant to flow therethrough, the refrigerant being supplied and discharged through openings formed at different positions. The method includes arranging a light projecting part and a light receiving part of a photosensor in the openings of the cooling flow path, respectively, and detecting light from the light projecting part by the light receiving part to thereby inspect a penetrating state of the cooling flow path.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: July 18, 2017
    Assignees: MITSUI HIGH-TEC, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Shibuta, Masashi Matsumoto, Tatsuhiko Mizutani, Yoshitada Yamagishi
  • Patent number: 9553487
    Abstract: The present disclosure relates to a radial and axial flux motor using integrated windings, which includes a rotor which includes a rotor core having a shape of a hollow cylindrical case, and permanent magnets for an inner lateral surface and permanent magnets for a ceiling surface that are coupled to the inner lateral surface and the ceiling surface of the rotor core respectively, and which is rotated about a shaft, and a stator which includes a stator core and windings coupled to the stator core and which is installed in the rotor. Therefore, a radial flux motor and an axial flux motor are integrated into one motor to be able to increase both efficiency and output.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: January 24, 2017
    Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
    Inventors: Jungmoo Seo, Sehyun Rhyu, Insoung Jung, Youngkyoun Kim, Jeongjong Lee
  • Patent number: 9537362
    Abstract: An electrical machine includes a rotor comprising a rotor core and a plurality of permanent magnets embedded radially within the rotor core to form a plurality of rotor poles. The electrical machine further includes a stator comprising a stator core disposed concentrically outside the rotor and including a plurality of stator teeth defining a plurality of stator slots there between. An arithmetic sum or difference of twice the number of stator teeth and the number of the stator poles equals the number of rotor poles.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: January 3, 2017
    Assignee: General Electric Company
    Inventors: Patrick Lee Jansen, Ronghai Qu
  • Patent number: 9419483
    Abstract: This disclosure relates in general to a new and improved electric motor/generator, and in particular to an improved system and method for producing rotary motion from a electro-magnetic motor or generating electrical power from a rotary motion input by concentrating magnetic forces due to electromagnetism or geometric configurations.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: August 16, 2016
    Assignee: Linear Labs, Inc.
    Inventor: Fred E. Hunstable
  • Patent number: 9287758
    Abstract: A slim type motor for a washing machine having a direct drive system and having a heat radiating structure includes: a stator in which stator cores around which coils are wound are disposed in an annular form in an annular stator support whose central portion is open, in order to emit heat generated in the inside of the motor to the outside; a rotor in which a number of permanent magnets are arranged in a back yoke mounted on a circular rotor support, to thus form an air gap with respect to the stator; and a rotating shaft that is coupled to the central portion of the rotor support and is driven by a torque of the rotor.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 15, 2016
    Assignee: AMOTECH CO., LTD.
    Inventor: Byoung Soo Kim
  • Patent number: 9231457
    Abstract: A switched reluctance apparatus and method of operating the same. The apparatus has an inner stator having a plurality of poles, a rotor disposed radially outward of the inner stator and having a plurality of segments serving as poles, and an outer stator disposed radially outward of the rotor and having a plurality of poles. A respective winding is disposed between every pair of adjacent poles of either stator. The apparatus operates with a plurality of separately excitable phases, a given phase being excited by energizing the windings corresponding to the given phase. Excitation of a given phase causes induction of magnetic fluxes traversing a region substantially confined to the region of the stators and rotor segments corresponding to the given phase, and causes a substantial amount of flux to enter rotor segments not in the radial direction but perpendicular to the radial direction.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: January 5, 2016
    Assignee: Board of Regents, The University of Texas System
    Inventors: Mohammadali Abbasian, Mehdi Moallem, Babak Fahimi
  • Patent number: 9143025
    Abstract: A magnetic gear mechanism including a simplified assembly of a magnetic flux modulating section in the magnetic gear mechanism which improves the strength thereof. In the magnetic flux modulating section of the magnetic gear mechanism, the magnetic flux modulating section being formed of a magnetic member and a non-magnetic member, a piece of the magnetic member and a piece of the non-magnetic member are separately produced. The piece of the magnetic member is sandwiched between circumferential projections provided in pieces of the non-magnetic member, and the magnetic member and the non-magnetic member and bearing holding sections form a structure in which the magnetic member and the non-magnetic member are fitted into the bearing holding sections by using recessed portions provided in the bearing holding sections and axial projections provided in the pieces of the non-magnetic member. This structure simplifies production and improves strength.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: September 22, 2015
    Assignee: HITACHI, LTD.
    Inventors: Norihisa Iwasaki, Yuji Enomoto, Junnosuke Nakatsugawa, Masashi Kitamura, Kinya Kobayashi, Hironori Matsumoto
  • Patent number: 9124144
    Abstract: A radial gap motor/generator that may be air or liquid cooled. The motor/generator has a stator in radially spaced relation to at least one thin annular induction structure. The motor/generator has at least two spaced apart annular rings each having an inner surface and outer surface, the annular rings having a permanent magnet structure embedded between the inner surface and outer surface of the annular rings. The motor/generator has at least two spaced apart radial gaps, the first gap between the first annular ring and the induction structure and the second gap between the second annular ring and the induction structure, the stator being disposed between the gaps. The motor/generator may include multiple gaps and multiple annular induction structures to increase the overall power density of the system.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: September 1, 2015
    Inventor: Bryan Prucher
  • Patent number: 9114029
    Abstract: An ankle module for a prosthetic foot can have an adapter portion pivotally coupled to a base portion. The base portion can be coupled to the prosthetic foot. The adapter portion can have a coupling member that removably couples the prosthetic foot to a prosthetic pylon or socket. The adapter portion can also have cylinders housing pistons slidably displaceable within the cylinders. An actuator is selectively actuatable to place the cylinders in fluid communication, allowing a fluid to flow between the cylinders as an angular position of the adapter portion is adjusted relative to the base portion, thereby adjusting the dorsi-plantar position between the adapter portion and the base portion of the ankle module. The actuator can be selectively actuatable to fluidly isolate the cylinders from each other so that the angular position of the adapter portion relative to the base portion remains substantially fixed.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: August 25, 2015
    Assignee: Össur hf
    Inventors: Sigurdur Ásgeirsson, David Landry, Sigurdur Olafsson, Grímur Jónsson, Arinbjörn V. Clausen, Gudni Ingimarsson
  • Patent number: 9106121
    Abstract: A double-stator includes outer and inner stators each having magnetic poles. Outer-stator and inner-stator windings are connected in series in phases, thereby generating winding magnetomotive force. Outer magnets and inner magnets of a rotor are arranged in a rotor core in the circumferential direction, the outer and inner magnets being alternated between a radially outward portion and a radially inward portion, at a pitch equal to that of the poles of the outer and inner stators so as to be magnetized so that a radially outer side thereof will serve as N poles or S poles and that a radially inner side thereof will serve as S poles or N poles. The rotor core includes outer poles formed between the outer magnets circumferentially adjacent to each other in the radially outward portion, and inner poles formed between the inner magnets circumferentially adjacent to each other in the radially inward portion.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: August 11, 2015
    Assignee: DENSO CORPORATION
    Inventor: Shin Kusase
  • Patent number: 9096119
    Abstract: The invention relates to a vehicle drive system, comprising an electromechanical converter, in particular an electric variable transmission. The converter is provided with a primary shaft having a rotor mounted thereon, a secondary shaft having an interrotor mounted thereon and a stator, fixedly mounted to a housing of the electromechanical converter. Viewed from the primary shaft in radial direction, the rotor, the interrotor and the stator are arranged concentrically relative to each other. Further, the primary shaft is arranged for being driven by an output shaft of an engine and the secondary shaft is arranged for driving an input shaft of a transmission unit.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 4, 2015
    Assignee: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
    Inventor: Darren Leigh Foster
  • Patent number: 9093874
    Abstract: A method, apparatus, article of manufacture and system for producing a field pole member for electrodynamic machinery are disclosed to, among other things, reduce magnetic flux path lengths and to eliminate back-iron for increasing torque and/or efficiency per unit size (or unit weight) and for reducing manufacturing costs. For example, a field pole member structure can either reduce the length of magnetic flux paths or substantially straighten those paths through the field pole members, or both. In one embodiment, a method provides for the construction of field pole members for electrodynamic machines.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: July 28, 2015
    Assignee: Novatorque, Inc.
    Inventors: John Patrick Petro, Ken George Wasson, Jeremy Franz Mayer
  • Patent number: 9080659
    Abstract: In an in-wheel motor driving device, since an involute speed reduction gear with a small difference in number of teeth which can be made small in size can be disposed on an inner side of an inner rotor type motor, a size of the in-wheel motor driving device in the direction of a rotational axis can be reduced. Further, in the inner rotor type motor, since a first stator is disposed so as to face a radially outer side of a large-diameter rotor, heat generated in the first stator is easily dissipated. On the other hand, in an outer rotor type motor, since a second stator is disposed so as to face a radially inner side of a small-diameter rotor, a torque radius of the small-diameter rotor can be made large, thereby making it possible to ensure a large torque capacity. Because of this, the outer rotor type motor can be made smaller in diameter than the inner rotor type motor, thereby making it possible to ensure a large space within a wheel.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: July 14, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Tsune Kobayashi, Motoyasu Yamamori, Tohru Onozaki
  • Patent number: 9059614
    Abstract: In a multi-gap type electric rotating machine, side cores include an outside-side core connected to one end side of an outside core, and an inside-side core connected to one end side of an inside core. The outside-side core includes an outer-side rotor-opposite portion which projects from the inner periphery end of the outside core and is opposite to an end face at the outer periphery side of a rotor. The inside-side core includes an inner-side rotor-opposite portion which projects from the outer periphery end of the inside core and is opposite to an end face at the inner periphery side of the rotor. The outside-side core and the inside-side core are arranged so as to be opposed to each other in the radial direction thereof with a gap being interposed between the inner periphery end of the outer-side rotor-opposite portion and the outer periphery end of the inner-side rotor-opposite portion.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: June 16, 2015
    Assignee: DENSO CORPORATION
    Inventors: Keiji Kondou, Shin Kusase, Takeo Maekawa
  • Patent number: 9006949
    Abstract: A double-stator synchronous motor has a rotor, an inner stator and an outer stator. The rotor has segment-magnetic poles arranged in a ring shape. Magnetic poles formed in the inner stator and the outer stator face to each other in a same circumferential position. Each stator has q (q?2) slots per pole and phase to disperse magnetomodive force. A radially minimum width Wr of each segment magnetic pole is within a range of 1.3q to 2.3q times of a minimum width Wt of outer teeth. A magnetic depth of a magnetic concave section formed in the segment magnetic pole is within a range of not less than an average width Ws of the inner slots. Because this suppresses demagnetization in the permanent magnets caused by stator magnetomotive force, ferrite magnets are used as buried magnets and magnetic-pole central magnets, and suppress the amount of neodymium magnet used in the rotor.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: April 14, 2015
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Keiji Kondou
  • Patent number: 8987963
    Abstract: In a double drive shaft motor, a stator and a field rotor are arranged at a radially outer side of a magnetic modulation rotor. The stator and the field rotor are arranged in series in an axial direction of the motor. This structure increases an amount of a winding coil of the stator and magnets in the field rotor, and an output torque of the motor. When a field magnetic flux passes through soft magnetic material members in the magnetic modulation rotor, because the generation and the reception of the magnetic flux can occur at a radially same side of the magnetic modulation rotor, this structure cancels an eddy current generated in the soft magnetic members and supporting members made of non-magnetic metal which tightly support the soft magnetic member. This structure provides a reduced axial size of the motor with high performance.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 24, 2015
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Akira Fukushima
  • Patent number: 8970080
    Abstract: Having a stator core including a yoke, a plurality of inside teeth, and a plurality of outside teeth, an inside rotor, and an output rotor, the inside slot open angle/inside pole angle and the outside slot open angle/outside pole angle are determined so that the inside cogging torque due to rotation of the inside rotor and the outside cogging torque due to rotation of the outside rotor may cancel each other in inverted phases. Plural combinations are provided so that the amplitude of inside cogging torque and the amplitude of outside cogging torque due to rotation of outside rotor maybe approximate values in inverted phase, and the combination of the highest combined voltage value of the both induced voltage is selected.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: March 3, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami
  • Patent number: 8946960
    Abstract: An axial flux electric motor is disclosed. The motor includes a rotor having a first rotor face, a second rotor face, a primary bearing locator on the first rotor face and one or more permanent magnets mounted to the first rotor face. Also included is a stator having a first stator face, a second stator face, a secondary bearing locator on the first stator face, a stator winding having one or more conductors and a connector for connection of the stator winding to a power source. A bearing assembly is also provided and positioned between the first face of the rotor and the first face of the stator for rotationally supporting movement of the rotor relative to the stator, the bearing assembly axially displacing the rotor from the stator to provide an air gap therebetween. The bearing assembly is engaged by the primary and secondary bearing locators to correctly position the bearing assembly.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: February 3, 2015
    Assignee: Regal Beloit America, Inc.
    Inventors: Steven Camilleri, Matthew Turner
  • Patent number: 8941279
    Abstract: There is provided an axial gap type generator. The axial gap type generator includes: a stator core fixed to a crank case of an engine; a rotor yoke fixed to a crankshaft of the engine and opposing the stator core across spacing in an axial direction of the crankshaft; a first planar section provided in the crankshaft and formed to have a planar shape that is perpendicular to a rotation center axis; a second planar section provided at a base, at which the rotor yoke is mounted on the crankshaft, and disposed opposing the first planar section; and a shim clamped between the first planar section and the second planar section.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kazuya Numaguchi, Hiroyuki Hisada
  • Patent number: 8937398
    Abstract: A wind turbine rotary electric machine having a rotor, which rotates about a designated axis and has a rotary body; a plurality of permanent magnets fitted to the rotary body; a plurality of cooling channels close to the permanent magnets; and a plurality of heat-conducting bodies, each located partly contacting at least one permanent magnet and partly inside a cooling channel.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: January 20, 2015
    Assignee: Wilic S.ar.l.
    Inventors: Matteo Casazza, Georg Folie
  • Patent number: 8901761
    Abstract: A variable speed electric machine and a method for generating electric energy is provided. The electric machine includes an outer stator with a first set of field windings. Further, the electric machine includes a modulator outer rotor that is concentric and is located proximate to the outer stator. The modulator outer rotor is operatively coupled to an input shaft. Furthermore the electric machine includes a permanent magnet inner rotor concentric to the modulator outer rotor. The electric machine also includes an inner stator with a second set of field windings. The inner stator is concentric to the inner rotor and is operatively coupled to an electric grid. The outer stator, the modulator outer rotor, inner stator and the inner rotor are magnetically coupled with each other so as to maintain a constant electric frequency at the inner stator.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: December 2, 2014
    Assignee: General Electric Company
    Inventors: Jan Erich Hemmelmann, Manoj Ramprasad Shah
  • Patent number: 8890389
    Abstract: An electric motor includes an inner stator including inner magnetic poles arranged circumferentially, an outer stator including outer magnets arranged circumferentially, and a rotor rotatably disposed between the inner and outer stators. The rotor includes a shaft, a rotor core fixed to the shaft and a winding wound on the rotor core. The rotor core includes a ring shaped yoke having a plurality of inner teeth extending inwardly and a plurality of outer teeth extending outwardly. The winding includes a plurality coils each including an inner side received in a corresponding inner slot formed between adjacent inner teeth and an outer side received in a corresponding outer slot formed between adjacent outer teeth.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: November 18, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Mao Xiong Jiang, Jian Zhao, Zhi Jun Wang, Ya Ming Zhang, Hai Hui Xiang
  • Patent number: 8884491
    Abstract: In a multi-gap electric rotating machine, a stator core has a radially outer portion, a radially inner portion and a connecting portion. The radially outer portion is located radially outside of a rotor core with a radially outer magnetic gap formed therebetween. The radially inner portion is located radially inside of the rotor core with a radially inner magnetic gap formed therebetween. The connecting portion radially extends to connect the radially outer and inner portions and is located on one axial side of the rotor core with an axial magnetic gap formed therebetween. A stator coil is formed of electric wires mounted on the stator core. Each of the electric wires has radially-outer in-slot portions, radially-inner in-slot portions and radially-intermediate in-slot portions, which are respectively received in slots of the radially outer portion, slots of the radially inner portion and slots of the connecting portion of the stator core.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: November 11, 2014
    Assignee: Denso Corporation
    Inventor: Shin Kusase
  • Patent number: 8876493
    Abstract: A fan motor includes a pair of fans axially mounted to both sides of a rotary shaft of the motor. The motor includes an inner rotor placed inside a stator wound with windings and an outer rotor placed outside the stator. The motor thus has a dual-rotor structure where the inner rotor and the outer rotor are held such that both the rotors can rotate on the rotary shaft.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: November 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Kiyomi Kawamura, Hu Li, Yuichi Yoshikawa, Hiroshi Murakami, Yasushi Kato
  • Patent number: 8860281
    Abstract: The multiple-gap electric rotating machine includes a rotor cantilever-supported at a first axial end thereof by a rotor arm coupled to a rotating shaft. The rotor includes a laminated core of core sheets made of soft magnetic material and an end-surface core disposed on a surface of the laminated core on a second axial end of the rotor. The laminated core includes segments joined in a ring and each formed with a salient pole structure at each of radially inner and outer peripheries thereof. The end-surface core includes soft magnetic sections made of steel and non-magnetic sections made of stainless steel, which are joined together in a ring. The laminated core is held between the rotor arm and the end-surface core, and fixed to the rotor arm by rivets penetrating through the rotor arm, laminated core and the end -surface core.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 14, 2014
    Assignee: Denso Corporation
    Inventors: Takeo Maekawa, Shin Kusase, Keiji Kondou
  • Patent number: 8860274
    Abstract: In a double-stator motor has a rotary shaft, an annular rotor is coupled with a rotary shaft. First and second three-phase stators are arranged inside and outside to the rotor in the radial direction and formed to generate first and second rotating magnetic fields in response to three-phase currents, respectively. The rotor has an even number of segment poles made of soft magnetic material and arranged mutually separately at positions of the rotor. The positions are equally distanced apart from the rotary shaft in the radial direction and in the circumferential direction. Each of the first and second three-phase stators has magnetic poles which are the same in the number of poles as the segment poles and the magnetic poles are positioned such that magnetomotive forces from the magnetic poles are faced to each other between the magnetic poles of the first and second three-phase stators.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 14, 2014
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Yousuke Kaname, Naoto Sakurai
  • Patent number: 8853907
    Abstract: A multi-phase electric motor comprises a stator comprising a plurality of wire coils surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a power source; a position sensor operably connected to the rotor; and a control circuit operably connected to the power source, the position sensor, and the wire coils, for controlling distribution of electrical energy to the wire coils. In this motor the control mechanism transfers electrical charge from a first coil to a second coil.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: October 7, 2014
    Assignee: Millennial Research Corporation
    Inventors: Denis L. Palmer, Edward Butler, Kevin Mosley
  • Patent number: 8847464
    Abstract: An electrical machine is provided. The electrical machine includes a rotor comprising an inner rotor having a plurality of inner rotor poles and an outer rotor having a plurality of outer rotor poles. The electrical machine further comprises a stator configured to modulate a magnetic flux and to transmit torque to inner rotor and the outer rotor, the stator comprising a stator core interposed concentrically between the inner rotor and the outer rotor; a multiple of stator windings disposed in a plurality of stator slots, the stator windings configured to form a multiple of stator poles. The stator further comprises a plurality of stator teeth interposed between the plurality of stator slots, wherein an arithmetic sum or difference of twice number of stator teeth and a number of the stator poles equals a number of rotor poles.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: September 30, 2014
    Assignee: General Electric Company
    Inventors: Ronghai Qu, Patrick Lee Jansen
  • Patent number: 8796895
    Abstract: An electric motor disposed in an electric vehicle includes a stator, a first rotor located at an outer side of the stator, and a second rotor located at an inner side of the stator, wherein each of the first rotor and the second rotor includes a plurality of first permanent magnets and a plurality of second permanent magnets, made of different materials from each other, whereby a material cost can be reduced and an output can be enhanced.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: August 5, 2014
    Assignee: LG Electronics Inc.
    Inventors: Jinha Choi, Gilwon Hong, Junyoung Lim, Jiseong Park, Hyeokjin Song, Jinsoo Park, Seungdo Han, Junggi Lee
  • Patent number: 8791616
    Abstract: The invention relates to an axial flux electric machine having permanent magnets and comprising a rotor surrounding a stator. It is characterized in that the stator comprises: a “support” first portion; a set of active modules constituting the secondary portion of the magnetic circuit; and fastener means for fastening the modules to the support portion.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 29, 2014
    Assignee: DDIS, S.A.S.
    Inventors: Jean Marc Canini, Bernard Claude Lhenry
  • Patent number: 8754568
    Abstract: Disclosed herein is a switched reluctance motor having a double rotor structure. An outer stator salient pole corresponding to an outer rotor salient pole is formed to have an “E” shape by sequentially disposing a main salient pole, a first auxiliary salient pole, and a second auxiliary salient pole and an inner stator salient pole corresponding to an inner rotor salient pole is formed to have a pi (?) shape by sequentially disposing a first salient pole and a second salient pole, such that a magnetic flux path is reduced, thereby making it possible to prevent the loss of magnetic force.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: June 17, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Changsung Sean Kim, Guen Hong Lee, Chang Hwan Choi, Han Kyung Bae, Hong Chul Shin
  • Patent number: 8736126
    Abstract: The Circular transformer-generator is a rotational electrical machine that joins creation of sinusoidal voltage and current with the transformation phenomenon or mutual inductivity of the individually wound stator coils. The Circular transformer-generator consists of the stator part that has a number of the inner pole extensions, and a number of the outer pole extensions with spaces between them for the individual stator windings, and of the double rotor assembly that contains the inner body and the outer body with the magnetic or electromagnetic poles that during rotor rotation supply induction to the stator assembly or the individual axially wound stator coils. The axially wound coils of the stator are connected to the Circular transformer-generator output, and at the same time are tied (act upon each other) by their mutual induction, during which time also the transformation coil ratio can be utilized.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: May 27, 2014
    Inventors: Franti{hacek over (s)}ek Konećný, Jan Konecný