Patents by Inventor Hiroyuki Mikami

Hiroyuki Mikami 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).

  • Publication number: 20220401377
    Abstract: Provided is a composition useful for preventing and/or treating neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease. The composition is for preventing and/or treating a neurodegenerative disorder, and contains, as an active ingredient, a compound represented by the following formula (I): or an isomer thereof, or a salt thereof.
    Type: Application
    Filed: October 20, 2020
    Publication date: December 22, 2022
    Inventors: Hideaki HARA, Masashi MIKAMI, Hiroyuki KOJIMA, Tatsuji TAKAHASHI, Kenichi ITO, Iddamalgoda ARUNASIRI
  • Publication number: 20220316797
    Abstract: To reduce work at an installation site when a plant facility is manufactured, modules are conveyed in order from a fabrication yard to the installation site, and expansion and contraction amounts of pipe spools are calculated based on a temperature difference between a temperature at the fabrication yard when the modules are manufactured and a temperature at the installation site when the modules are installed at the installation site. Further, an installation position of a foundation is adjusted toward a direction to cancel out the expansion and contraction amounts of the plurality of pipe spools, and the pipe spool is moved toward the direction to cancel out the expansion and contraction amounts of the plurality of pipe spools. The modules are installed with the positions of the end portions of the pipe spools being adjusted.
    Type: Application
    Filed: August 14, 2019
    Publication date: October 6, 2022
    Applicant: JGC CORPORATION
    Inventors: Hiroshi KISHIMOTO, Takuya TSUTSUI, Makoto MIKAMI, Hiroyuki KOITO
  • Patent number: 8841812
    Abstract: An object of the present invention is to provide a squirrel-cage induction motor with high efficiency. In a squirrel-cage induction motor including a stator in which stator windings are wound in a number of stator slots arranged at intervals in the vicinity of the inner periphery of a stator core and a rotor in which rotor conductors are embedded in a number of rotor slots arranged at intervals in the vicinity of the outer periphery of a rotor core and end rings are provided at both ends of the rotor core, the rotor core is formed of a plurality of blocks, an annular short-circuit ring is provided between respective blocks of the rotor core to short-circuit the rotor conductors, and laminated thickness of the rotor core is made larger than laminated thickness of the stator core.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: September 23, 2014
    Assignee: Hitachi Ltd
    Inventors: Kazuo Nishihama, Hiroyuki Mikami, Tadahiro Shimozono, Keiichiro Kaihatsu, Atsushi Abe
  • Patent number: 8816559
    Abstract: A squirrel cage induction motor includes: a stator core (11); a plurality of stator slots (12) radially disposed in a circumferential direction of the stator core (11) with predetermined intervals; a plurality of stator windings (13) housed in the stator slots respectively; a rotor core (21); a plurality of rotor slots (22) radially disposed in a circumferential direction of the rotor core (22) with predetermined intervals; a plurality of rotor conductors (23) housed in the rotor slots (22) respectively. The stator windings (13) and the rotor conductors (23) includes electrically conductive materials mainly composed of copper. An area ratio of a total area of the stator slots (12) to a total area of the rotor slots (22) is not smaller than 2.7 and not greater than 8.0 to provide compatibility between the starting characteristic (starting torque) and the steady characteristic (for a high efficiency) can be provided.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: August 26, 2014
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kazuo Nishihama, Hiroyuki Mikami, Tadahiro Shimozono, Keiichiro Kaihatsu
  • Patent number: 8624462
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: January 7, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Akihito Nakahara, Hiroyuki Mikami, Kazumasa Ide, Kazuhiko Takahashi, Kenichi Hattori
  • Patent number: 8546991
    Abstract: A synchronous generator 1 including a rotor having a field winding placed in the slots thereof and a stator having an armature winding placed in the slots thereof, wherein the value of the number of slots per two poles in stator minus the number of slots per two poles in rotor is equal to or greater than +9, or equal to or smaller than ?9.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: October 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Sawahata, Kazuo Nishihama, Hiroyuki Mikami, Tetsuo Fujigaki, Motonobu Iizuka, Shuji Mizutani
  • Patent number: 8405272
    Abstract: There is provided a self-starting permanent magnet synchronous motor in which a center axis of magnetic poles of a rotor is assumed to be a d axis, an axis deviated from the magnetic pole center axis by an electric angle of 90 degrees is assumed to be a q axis, at least two or more starting bars which are arranged near the d axis are arranged on a bore side of the bars near the q axis and are arranged in parallel with the q axis, so that a stable starting torque can be generated irrespective of a generating position of a stator magnetic flux which changes due to applying timing of a power source and a phase of a voltage, and a vibration/noises at the time of a stationary operation can be reduced.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: March 26, 2013
    Assignee: Hitachi Appliances, Inc.
    Inventors: Satoshi Kikuchi, Hiroyuki Mikami, Tomio Yoshikawa, Baiying Huang, Hideyuki Kumakura
  • Patent number: 8400040
    Abstract: A permanent magnet type rotary electric machine has a rotor having a rotor core and permanent magnets buried into the rotor core by being incorporated into respective permanent magnet slots. The permanent magnet slot per one pole is divided at least into four slots along an outer circumferential direction in the rotor core, and in respective rest core-portions between adjacent divided permanent magnet slots in the rotor core, a width of a first rest core-portion at the middle of each pole and a width of a second rest core-portion between adjacent poles of different polarities are formed larger than that of the others.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: March 19, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Kori, Hiroyuki Mikami, Seikichi Masuda, Mamoru Kimura
  • Patent number: 8304953
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: November 6, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Akihito Nakahara, Hiroyuki Mikami, Kazumasa Ide, Kazuhiko Takahashi, Kenichi Hattori
  • Patent number: 8174156
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Akihito Nakahara, Hiroyuki Mikami, Kazumasa Ide, Kazuhiko Takahashi, Kenichi Hattori
  • Patent number: 8148865
    Abstract: Movement of magnets due to centrifugal force is restricted. In a permanent magnet rotating electrical machine 100 having a stator 1 and a rotor core 5 provided with a plurality of permanent magnets 3 inserted in an outer circumferential portion of the rotor 5, each permanent magnet 3 has inclined surfaces on the outer circumferential side of the rotor 2 and the thinnest portions of the inclined surfaces are adjacent to permanent magnets of the opposite polarity. Further, each magnet 3 has a convex-shaped cross section and is divided into two magnet segments 3, 3. A magnetic pole bridge 15 is formed at the boundary of the permanent magnet segments 3, 3. Thus, movement of the permanent magnet segments 3, 3 due to centrifugal force is firmly restricted, and the peeling off of the rotor core 5 and the permanent magnet segments 3, 3 from each other is prevented.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 3, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Mamoru Kimura, Daisuke Kori, Hiroyuki Mikami, Seikichi Masuda, Masayasu Fujieda
  • Publication number: 20110234039
    Abstract: An object of the present invention is to provide a squirrel-cage induction motor with high efficiency. In a squirrel-cage induction motor including a stator in which stator windings are wound in a number of stator slots arranged at intervals in the vicinity of the inner periphery of a stator core and a rotor in which rotor conductors are embedded in a number of rotor slots arranged at intervals in the vicinity of the outer periphery of a rotor core and end rings are provided at both ends of the rotor core, the rotor core is formed of a plurality of blocks, an annular short-circuit ring is provided between respective blocks of the rotor core to short-circuit the rotor conductors, and laminated thickness of the rotor core is made larger than laminated thickness of the stator core.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 29, 2011
    Inventors: Kazuo Nishihama, Hiroyuki Mikami, Tadahiro Shimozono, Keiichiro Kaihatsu, Atsushi Abe
  • Publication number: 20110210692
    Abstract: A squirrel cage induction motor includes: a stator core (11); a plurality of stator slots (12) radially disposed in a circumferential direction of the stator core (11) with predetermined intervals; a plurality of stator windings (13) housed in the stator slots respectively; a rotor core (21); a plurality of rotor slots (22) radially disposed in a circumferential direction of the rotor core (22) with predetermined intervals; a plurality of rotor conductors (23) housed in the rotor slots (22) respectively. The stator windings (13) and the rotor conductors (23) includes electrically conductive materials mainly composed of copper. An area ratio of a total area of the stator slots (12) to a total area of the rotor slots (22) is not smaller than 2.7 and not greater than 8.0 to provide compatibility between the starting characteristic (starting torque) and the steady characteristic (for a high efficiency) can be provided.
    Type: Application
    Filed: August 20, 2009
    Publication date: September 1, 2011
    Applicant: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Kazuo Nishihama, Hiroyuki Mikami, Tadahiro Shimozono, Keiichiro Kaihatsu
  • Patent number: 7994666
    Abstract: A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: August 9, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Kori, Tetsuo Fujigaki, Shuji Aizawa, Motonobu Iizuka, Yasushi Iwai, Hiroyuki Mikami, Mamoru Kimura
  • Publication number: 20110140582
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 16, 2011
    Inventors: Akihito Nakahara, Hiroyuki Mikami, Kazumasa Ide, Kazuhiko Takahashi, Kenichi Hattori
  • Publication number: 20110140566
    Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 16, 2011
    Inventors: Akihito NAKAHARA, Hiroyuki MIKAMI, Kazumasa IDE, Kazuhiko TAKAHASHI, Kenichi HATTORI
  • Patent number: 7952249
    Abstract: A rotor is deployed such that the rotor becomes coaxially rotatable with a stator. A shaft is fixed onto the axis of a rotor iron-core. 1-pole constituting magnet slots are deployed into V-character pattern along an outer circumference portion of the rotor iron-core. Permanent magnets are embedded into the magnet slots. For the 1 pole, the 2 pieces of same-polarity permanent magnets are embedded into the V-character pattern. The configuration of each embedded permanent magnet is designed as follows: From the thickness of the permanent-magnet edge portion on the inner-diameter side of the rotor iron-core, which becomes the center of the V-character pattern, the thickness of the permanent magnet gradually increases toward the outer-diameter side of the rotor iron-core, which become the right and left edge portions of the V-character pattern. Simultaneously, curved lines are provided on both edge portions of the permanent magnet.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: May 31, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Daisuke Kori, Mamoru Kimura, Hiroyuki Mikami, Seikichi Masuda, Masayasu Fujieda
  • Patent number: 7902713
    Abstract: A self-starting type permanent magnet synchronous motor comprises a stator and a rotor. The rotor comprises a rotor core having a plurality of slots provided in an outer periphery thereof and a cage winding comprising conductive bars embedded in the slots and conductive end rings that short-circuit the conductive bars on both end faces of the bars in an axial direction thereof. The rotor core comprises at least one magnet insertion hole arranged on an inner peripheral side from the slots, and at least one permanent magnet embedded in the at least one magnet insertion hole. When a pole center axis is denoted as a d-axis and an axis deviating from the pole center axis by an electrical angle 90° is denoted as a q-axis, a flux content generated by the cage winding during start-up becomes maximal in the vicinity of and on one of the d-axis and the q-axis.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: March 8, 2011
    Assignee: Hitachi Appliances, Inc.
    Inventors: Satoshi Kikuchi, Hiroyuki Mikami, Akeshi Takahashi, Tomio Yoshikawa, Keiji Tanaka, Masashi Miyake, Baiying Huang, Masaru Ohtahara, Kenji Tojo, Hideyuki Kumakura
  • Publication number: 20110030419
    Abstract: There is provided a self-starting permanent magnet synchronous motor in which a center axis of magnetic poles of a rotor is assumed to be a d axis, an axis deviated from the magnetic pole center axis by an electric angle of 90 degrees is assumed to be a q axis, at least two or more starting bars which are arranged near the d axis are arranged on a bore side of the bars near the q axis and are arranged in parallel with the q axis, so that a stable starting torque can be generated irrespective of a generating position of a stator magnetic flux which changes due to applying timing of a power source and a phase of a voltage, and a vibration/noises at the time of a stationary operation can be reduced.
    Type: Application
    Filed: August 5, 2010
    Publication date: February 10, 2011
    Inventors: Satoshi KIKUCHI, Hiroyuki MIKAMI, Tomio YOSHIKAWA, Baiying HUANG, Hideyuki KUMAKURA
  • Patent number: 7880358
    Abstract: A permanent magnet rotating electric machine has a stator provided with a plurality of windings, and a rotor in which magnets are disposed in slots formed in a rotor core along an outer circumference thereof. The rotor core is fixed on a rotary shaft rotating inside the stator, and one magnetic pole is constituted by each group of three or more of the magnets. A total angle occupied by the group of magnets constituting one magnetic pole is in the range of 150 to 165 degrees in terms of an electrical angle.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: February 1, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tsukasa Taniguchi, Hiroyuki Mikami, Satoshi Kikuchi, Fumio Jyoraku, Hideyuki Harada