Patents by Inventor Makoto Taniguchi

Makoto Taniguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9197103
    Abstract: A stator core includes a yoke member and a teeth member. The yoke member is in an annular shape. The teeth member includes teeth and connecting portions. The teeth are projected from the yoke member radially inward. The teeth are formed of a steel plate stacked along a circumferential direction. At least one of the connecting portions connects a part of a tip end of one of the teeth in an axial direction with a part of a tip end of an other of the teeth in the axial direction. The one of the teeth and the other of the teeth are adjacent to each other in the circumferential direction.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: November 24, 2015
    Assignee: DENSO CORPORATION
    Inventor: Makoto Taniguchi
  • Patent number: 9184648
    Abstract: In an electric motor, each tooth of the stator has a radially extending pillar portion and the number of teeth per magnetic pole is k. When the number k is odd and a center line passing each pole agrees with a center of a circumferential width of one tooth, the pole has first and second corners which are the closest to the stator and positioned before and after the center line in a rotational direction, respectively, and the teeth includes teeth which are the closest to the first and second corners and defined as first and second teeth, respectively. The first and second corners are located according to positional relationships of the first and second teeth and edges of the pillar portions of the first and second teeth in the rotation direction.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: November 10, 2015
    Assignee: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Kousuke Hanada
  • Patent number: 9166504
    Abstract: A control apparatus for a motor-generator includes a stator including multi-phase coils, a rotor, a multi-phase inverter one arm of which includes a switch element and a free-wheeling element, and a power supply connected between a neutral point of the coils and a negative electrode of the inverter. When the switch elements are driven by rectangular wave, the low-side switch element connected to the high-side switch element is subject to PWM switching control while the high-side switch element is off. When a time point, at which the high-side switch element is turned off, is defined as a base point, if ? is defined as a time when switching of the low-side switch element starts, and ? is defined as a time when the switching ends, ?-? is 120 degrees in electrical degree or more, ? is more than 0 degrees, and ? is less than 180 degrees.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 20, 2015
    Assignee: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Kouichi Nagata, Masahiko Osada
  • Patent number: 9143014
    Abstract: A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: September 22, 2015
    Assignees: DENSO CORPORATION, ASMO CO., LTD.
    Inventors: Makoto Taniguchi, Jirou Hayashi, Masahiro Goto
  • Patent number: 9132810
    Abstract: A parking device includes a drive cam disposed around an MG shaft that transmits a drive force of a second motor generator by being coupled with a parking gear, a driven cam disposed around an MG shaft so as to be able to rotate integrally with the MG shaft and capable of moving in the axial direction of the MG shaft by a relative rotation generated between the driven cam and the drive cam when the parking gear is locked by a pilot clutch, and a dog type brake that engages the parking gear with the MG shaft and a transaxle case accommodating the parking device by the movement of the driven cam. With the configuration, a shock load at the time of operation can be suppressed and the parking device can be reduced in size.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: September 15, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Shioiri, Haruo Isomura, Makoto Taniguchi, Hiroyuki Shibata, Shotaro Kato
  • Patent number: 9106115
    Abstract: A rotating electrical machine includes a stator core, a rotor core, and permanent magnets. The stator core includes a yoke and tooth portions projecting from the yoke in a radial inward direction. Each tooth portion has a base joined to the yoke and an end opposite to the base. The rotor core includes a boss portion and projections. The projections project from the boss portion in a radial outward direction and spaced in a circumferential direction. Each permanent magnet is located between and spaced from adjacent projections to forma gap in the circumferential direction. A width of the gap is not greater than a width of the end of the tooth portion in the circumferential direction.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: August 11, 2015
    Assignee: DENSO CORPORATION
    Inventor: Makoto Taniguchi
  • Publication number: 20150222156
    Abstract: A seal member of a driver apparatus contacts a case and a first frame end. The seal member has an opening in which a lead wire is inserted and an inside wall surface of the opening contacts the lead wire. Further, the seal member is made of a stretchable material, and is held in position only by a binding force between the case and the first frame end. The seal member is fixedly held by the first frame end and the case after an insertion of the lead wire in the opening and disposition on the fixing member opposing face. Therefore, an installation of the seal member is performed by an inserting the lead wire into the opening and a positioning the seal member on the case.
    Type: Application
    Filed: January 30, 2015
    Publication date: August 6, 2015
    Inventors: Hiroki TOMIZAWA, Makoto TANIGUCHI, Hiroshi IMAI
  • Patent number: 9097334
    Abstract: Disclosed is a caulking tool used for a ring gear press-fit in the outer periphery of a flange of a differential case constituting a differential subassembly, in order to caulk a caulking portion provided on at least either end of the flange in the axial direction, with respect to a plurality of notches formed in at least either end of the ring gear in the axial direction. The notches are formed along the inner periphery of the ring gear. Each notch has a bottom part slanted at a predetermined angle with respect to the radial direction of the ring gear, and a plurality of protrusions which correspond to the notches and are projected from the slant portion, in order to press the caulking portion in the axial direction of the ring gear.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: August 4, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihiko Ukai, Makoto Taniguchi, Hirokazu Tsunekawa
  • Patent number: 9068640
    Abstract: A fastening structure for a ring-gear and a differential case comprises a differential case which is provided with: a ring gear having a gear section formed on the outer peripheral surface thereof, and a plurality of notch portions formed on the inner peripheral surface thereof; a press-fitting surface whereon the ring gear is press-fitted; and a flange section which is forced against and caulked to the notch portions, at the end of the press-fitting surface. After the ring gear has been press-fitted to the press-fitting surface, the flange section is forced toward the notch portions, and thus the differential case is caulked and fastened to the ring gear. The notch portions have stepped surfaces , and thus rattling generated during torque transmission can be suppressed.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: June 30, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Makoto Taniguchi, Yoshihiko Ukai, Hirokazu Tsunekawa, Hiroyuki Shioiri
  • Publication number: 20150162789
    Abstract: Each permanent magnet provided in a rotor includes a projection that projects toward a corresponding predetermined portion of the rotor core. An inner peripheral surface of each permanent magnet, which is radially opposed to the corresponding predetermined portion of the rotor core, includes a primary contacting portion and two primary non-contacting portions. The primary contacting portion contacts the corresponding predetermined portion of the rotor core at a circumferential location, which corresponds to the projection. The primary non-contacting portions do not contact the rotor core and are located on two circumferentially opposite sides, respectively, of the primary contacting portion.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 11, 2015
    Inventors: Asuka TANAKA, Akihiro Kimura, Jirou Hayashi, Makoto Taniguchi
  • Publication number: 20150145370
    Abstract: A rotor core has a regular decagon base portion in its cross section relative to a shaft center and ten convex portions each of which is located between each angle of the regular decagon base portion. Each convex portion has a first convex curve having a single curvature radius. Each permanent magnet is a curved plate and has a concave curve and a second convex curve. Each permanent magnet is provided so that the concave curve adheres on the first convex curve. When each permanent magnet moves in circumferential direction relative to the rotor core, the concave curve slides on the first convex curve of the rotor core. A position of the smallest gap clearance between the second convex curve and the stator does not change. A magnetic-flux-strength maximum position is not changed easily.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 28, 2015
    Inventor: Makoto TANIGUCHI
  • Patent number: 9017213
    Abstract: Disclosed is a fastening structure of a ring gear, wherein a ring gear is fastened to a flange of a differential case constituting a differential subassembly. The ring gear has an inner peripheral surface to be press-fitted to the outer peripheral surface of the flange, and is swaged by a swaging portion provided on at least one end of the flange in the axial direction. In order to prevent the ring gear from deforming in the radial direction, an engaging means for engaging the flange with the ring gear using the relationship between a recess and a protrusion is provided. The engaging means is comprised of a recess formed at an end face of the ring gear and a protrusion formed on the flange. The protrusion is engaged in the recess by swaging.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: April 28, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Makoto Taniguchi, Hiroyuki Shioiri
  • Publication number: 20150061453
    Abstract: A stator core includes a yoke member and a teeth member. The yoke member is in an annular shape. The teeth member includes teeth and connecting portions. The teeth are projected from the yoke member radially inward. The teeth are formed of a steel plate stacked along a circumferential direction. At least one of the connecting portions connects a part of a tip end of one of the teeth in an axial direction with a part of a tip end of an other of the teeth in the axial direction. The one of the teeth and the other of the teeth are adjacent to each other in the circumferential direction.
    Type: Application
    Filed: June 23, 2014
    Publication date: March 5, 2015
    Inventor: Makoto Taniguchi
  • Publication number: 20150054375
    Abstract: A stator for a rotational electrical machine includes a cylindrical stator core and a stator winding. The stator core includes slots arranged at intervals in a circumferential direction. The slots pass through the stator core in an axial direction. The stator winding is obtained by joining together ends of U-shaped conductors inserted through the slots. A second insertion part is located away from a first insertion part in the circumferential direction and is inserted in its corresponding slot. A joining end part is joined to another U-shaped conductor at a joining position away from the insertion part in the circumferential direction. The joining end part includes a first bent part and at least one second bent part. The first bent part is bent near an opening of its corresponding slot. The second bent part is bent between the first bent part and the joining position.
    Type: Application
    Filed: August 12, 2014
    Publication date: February 26, 2015
    Inventors: Makoto TANIGUCHI, Nobuyuki KIMURA, Masaru WATANABE, Hideaki KURI
  • Patent number: 8928264
    Abstract: According to typical examples, the first stator winding having the lower rated voltage is connected to the second direct-current voltage source only when the rotation speed of the rotating electrical machine becomes high. Therefore, output in a high-rotation range can be ensured while preventing the second stator winding from reaching a heat-generation limit. Furthermore, such switching operations can be actualized by the first switch and the second switch. Therefore, a control device of a rotating electrical machine can be actualized by a relatively simple configuration.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: January 6, 2015
    Assignee: Denso Corporation
    Inventor: Makoto Taniguchi
  • Publication number: 20140346907
    Abstract: A rotating electric machine has a first frame and a second frame disposed at one axial end of a casing. The first and second frames have a first flange and a second flange, respectively, that protrude outwardly from the casing. The first and second flanges are fastened together by a through bolt. The first flange includes a recessed portion having a first curved portion, a second curved portion, and a third curved portion, A curvature radius of the third curved portion is greater than a curvature radius of the first curved portion and a curvature radius of the second curved portion such that a concentration of stress within the third curved portion that is caused by a fastening force of the through bolt may be reduced.
    Type: Application
    Filed: May 23, 2014
    Publication date: November 27, 2014
    Applicant: DENSO CORPORATION
    Inventors: Makoto TANIGUCHI, Hiroshi Imai
  • Patent number: 8893575
    Abstract: An annular caulking-fastened component to be fastened to a counterpart component by caulking includes a notch formed in an inner peripheral edge portion at one end side in a center axis direction, the notch being to be fixed to the counterpart component by caulking; and at least one of an inner-peripheral stepped portion formed between an inner peripheral surface and the inner peripheral edge portion and outward from the inner peripheral surface in a radial direction and an end-face stepped portion formed between an end face at one end side in the center axis direction and the inner peripheral edge portion and from the end face toward the other end side in the center axis direction.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: November 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Makoto Taniguchi, Yuki Kurosaki, Yoshihiko Ukai, Jun Kamitake, Jo Kayahana, Shuhei Yamaguchi, Katsuaki Makino
  • Publication number: 20140339966
    Abstract: A motor casing of a driving device has a cylindrical wall portion, a bottom wall portion and a bearing holding portion formed in the bottom wall portion. An electric motor has a stator, a shaft and a rotor. A motor control unit controls operation of the electric motor. A first frame, to which the motor control unit is fixed, is provided between the motor control unit and the bottom wall portion of the motor casing. A first contacting portion is formed in the bottom wall portion and projected toward the first frame. The first contacting portion is in contact with the first frame at a front-side surface of the first contacting portion. A contacting surface area between the motor casing and the first frame is limitedly reduced, to thereby reduce noise caused by vibration. In addition, since a sufficient surface pressure can be obtained, strength of the driving device in its axial direction is increased.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: DENSO CORPORATION
    Inventors: Hiroki TOMIZAWA, Makoto TANIGUCHI
  • Patent number: 8878471
    Abstract: In a control apparatus for an AC electric motor, a dq axis current feedback control unit 44 and a qn axis current feedback control unit 46 execute a feedback control of higher harmonic components of actual currents id and iq flowing in an AC electric machine 10 to higher harmonic current instruction values ?idkr and ?iqkr. A d axis current instruction value adjusting unit 24 and a q axis current instruction value adjusting unit 26 add the higher harmonic current instruction values ?idkr and ?iqkr to fundamental current instruction values idr and iqr. Ad axis current feedback control unit 32 and a q axis current feedback control unit 34 execute a feedback control of a difference between the actual currents id and iq and the sum of the higher harmonic current instruction values ?idkr, ?iqkr and the fundamental current instruction values idr and iqr into zero.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: November 4, 2014
    Assignee: Denso Corporation
    Inventors: Hidenori Katou, Makoto Taniguchi
  • Publication number: 20140312746
    Abstract: A motor includes a stator core fitted to a cylindrical portion of a case, a rotor core being rotatable in the stator core, soft magnetic poles radially extending from the rotor core, and magnet poles disposed between the soft magnetic poles. The case includes a bottom portion having a ring-shaped plate portion, a protrusion portion, and a bearing-supporting portion extending from the protrusion portion. A condition that L2?t and a condition that L1?L2 are met, wherein t represents a thickness of the bottom portion, L1 represents a distance in an axial direction between a side surface of the ring-shaped plate portion close to the stator core and a protrusion end of the protrusion portion close to the rotor core, and L2 represents a distance in the axial direction between the side surface and an end surface of a bearing opposite to the rotor core.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 23, 2014
    Applicant: Denso Corporation
    Inventor: Makoto TANIGUCHI