Patents by Inventor Hiroaki Kajiura

Hiroaki Kajiura 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: 8253296
    Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: August 28, 2012
    Assignee: Denso Corporation
    Inventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
  • Publication number: 20120007462
    Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 12, 2012
    Applicant: DENSO CORPORATION
    Inventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
  • Patent number: 8008830
    Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are formed at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 30, 2011
    Assignee: Denso Corporation
    Inventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
  • Publication number: 20100141078
    Abstract: The wire 30 forming the stator winding 20 includes the in-slot portions 40 to be disposed in the slots 14 and 15 of the stator core 12 and the turned portions 42 connecting the in-slot portions 40 disposed in the circumferentially different slots 14 and 15. The turned portions 42 formed on axial opposite end sides of the stator core 12. The crank portion 44 which does not twist is formed at substantially the center of the turned portion 42. Steps are fanned at sections of the turned portion 42 which protrude outside the stator core 12 from the slots 14 and 15. Further, the turned portion 42 of the wire 30 also has two steps 48 formed between the substantially central crank portion 44 and each of the steps 46 formed at the protruding sections of the turned portion 42.
    Type: Application
    Filed: March 4, 2008
    Publication date: June 10, 2010
    Applicant: DENSO CORPORATION
    Inventors: Shinji Kouda, Hiroaki Kajiura, Masahiro Takada
  • Patent number: 6806687
    Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: October 19, 2004
    Assignee: Denso Corporation
    Inventor: Hiroaki Kajiura
  • Patent number: 6798104
    Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: September 28, 2004
    Assignee: Denso Corporation
    Inventors: Hiroaki Kajiura, Masahiro Seguchi
  • Publication number: 20040150233
    Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.
    Type: Application
    Filed: January 22, 2004
    Publication date: August 5, 2004
    Applicant: Denso Corporation
    Inventor: Hiroaki Kajiura
  • Patent number: 6713888
    Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: March 30, 2004
    Assignee: Denso Corporation
    Inventor: Hiroaki Kajiura
  • Publication number: 20030090167
    Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.
    Type: Application
    Filed: December 16, 2002
    Publication date: May 15, 2003
    Applicant: DENSO CORPORATION
    Inventors: Hiroaki Kajiura, Masahiro Seguchi
  • Patent number: 6563246
    Abstract: A rotary electric machine includes a stator core having a plurality of slots disposed at an inner periphery, an armature winding disposed in the slots and a rotor disposed inside the inner periphery of the stator. The rotor includes a first rotor portion and a second rotor portion, which are disposed magnetically in parallel with each other. The first rotor portion has a plurality of permanent-magnet poles, and a second rotor portion has a plurality of salient induction poles.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: May 13, 2003
    Assignee: Denso Corporation
    Inventors: Hiroaki Kajiura, Masahiro Seguchi
  • Publication number: 20020074803
    Abstract: A vehicle motor-generator apparatus based on a field winding type of synchronous machine coupled to a power inverter and a battery, wherein the synchronous machine is controlled to operate as a motor to perform engine starting and thereafter be driven by the engine as an electrical generator, wherein during a short time interval at the commencement of engine starting, the armature winding of the synchronous machine is driven by a current such that magnetic flux is produced by the armature winding acting in the same direction as magnetic flux produced by the field winding, to thereby achieve increased torque during the time when maximum torque is required.
    Type: Application
    Filed: December 19, 2001
    Publication date: June 20, 2002
    Applicant: Denso Corporation
    Inventor: Hiroaki Kajiura
  • Patent number: 6018694
    Abstract: A gas-sparing vehicle is achieved by a control system for a hybrid vehicle equipped at least with: a hybrid engine which includes at least a first rotary electric unit for deciding the rpm of the engine and a second rotary electric unit for deciding the driving force of the vehicle and which has power converting means connected to the output shaft of the engine; and electricity storing means. In one embodiment, a hybrid controller 16 controls the drive of a first rotary electric unit 2000 according to a startup torque command value which is decided based on the rpm of an engine at the time of engine startup and which decreases as the rpm increases; it also determines that the complete explosion in an engine 1 has occurred when the startup torque command value falls below a predetermined complete explosion judgment value.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: January 25, 2000
    Assignee: Denso Corporation
    Inventors: Tsuneyuki Egami, Hiroshi Fujita, Keiichiro Banzai, Takeshi Sawada, Hiroya Tsuji, Kazuyoshi Obayashi, Hiroaki Kajiura, Masahiro Seguchi, Toyoaki Kurita
  • Patent number: 5955807
    Abstract: A synchronous electric machine includes a stator having an armature winding, a rotor having axially laminated magnetic sheets and a field coil, a plurality of permanent magnets disposed in the rotor to form N-pole and S-pole on the outer circumference of the rotor, and ribs and pins magnetically bypassing the N-poles and S-poles of the permanent magnets. The pins also attach the laminated magnetic sheets together as a unit. The rotor has a plurality of axially extending holes on its circumference for accommodating permanent magnets.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: September 21, 1999
    Assignee: Denso Corporation
    Inventors: Hiroaki Kajiura, Keiichiro Banzai, Sumio Yanase, Akira Fukushima
  • Patent number: 5917248
    Abstract: A T-S converter is composed of a first rotor which has a first control coil, a second rotor and a stator which has a second control coil. The second rotor has a first magnetic field member (such as permanent magnets) which supplies the first control coil with magnetic field and a second magnetic field member (such as permanent magnets) which supplies the second control coil with magnetic field. The first and second control coils are energized to drive the second rotor to rotate at a set speed with a set torque according to vehicle running condition. The first and the second control coil are also energized to generate battery charging current when the vehicle speed is decreased and the second rotor is driven by the vehicle wheels.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: June 29, 1999
    Assignee: Denso Corporation
    Inventors: Masahiro Seguchi, Hiroaki Kajiura, Keiichiro Banzai, Shinji Kouda, Kazuyoshi Obayashi
  • Patent number: 5744895
    Abstract: A T-S converter is composed of a first rotor which has a first control coil, a second rotor and a stator which has a second control coil. The second rotor has a first magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the first control coil with magnetic field and a second magnetic field member (such as laminated sheets of ferromagnetic material) which supplies the second control coil with magnetic field. The first and second control coils are energized to drive the second rotor to rotate at a set speed with a set torque according to vehicle running condition. The first and the second control coil are also energized to generate battery charging current when the vehicle speed is decreased and the second rotor is driven by the vehicle wheels.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: April 28, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masahiro Seguchi, Keiichiro Banzai, Hiroaki Kajiura, Akio Yasuda
  • Patent number: 5663631
    Abstract: A full-wave-rectifying-circuit is composed of six diodes and six transistors inversely connected in parallel with the diodes. A phase-control-circuit has three magnetic sensors each of which corresponds to one of the phase-windings and positioned so as to lag by an electric angle of 90.degree. to provide digital signals which lag an electric at an angle of 60.degree. behind the induced-phase-signal. The six transistors are driven by the digital signals to form controlled AC voltages which lag behind the induced line voltages by an electric angle 60.degree. so that the alternator increases the output power without increase of the body size.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: September 2, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroaki Kajiura, Akira Mase
  • Patent number: 5449962
    Abstract: A stator coil of a rotary electric machine includes a three-phase Y-form connection circuit including first windings Y1, Y2 and Y3, which are connected in Y-form, and a three-phase delta-form connection circuit including second windings .increment.x3, .increment.y3 and .increment.z3 which are connected in delta-form, wherein the second windings .increment.x3, .increment.y3 and .increment.z3 are sequentially inserted in slots of a stator core to have a phase difference of 120.degree. therebetween, and each of the first windings Y1, Y2 and Y3 is divided into two windings, and the divided first windings are separately inserted in the slots, in which the second windings .increment.x3, .increment.y3 and .increment.z3 have been inserted, so that the resultant composite voltage vector of each pair of the divided first windings is shifted by 30.degree. in phase from the voltage vector of one of the second windings .increment.x3, .increment.y3 and .increment.z3.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: September 12, 1995
    Assignee: Nippondenso Co., Ltd.
    Inventors: Akiya Shichijyo, Shin Kusase, Hiroaki Kajiura, Atsushi Umeda