Patents by Inventor Tsunenobu Yamamoto

Tsunenobu Yamamoto 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: 7612509
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: November 3, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takahiro Urakabe, Tsunenobu Yamamoto, Yoshihito Asao
  • Patent number: 7414343
    Abstract: A hybrid-excited rotating machine comprising: a stator winding of a multi-phase Y-connection; a plurality of rotor magnetic poles fixed on a rotor shaft 3 at a predetermined spacing in the circumferential direction and confronting the inner circumference of said stator through a air gap; a plurality of permanent magnets fixed at substantially central portions of said circumferential direction of said individual rotor magnetic poles and magnetized in the radial direction of said rotor shaft; and a plurality of field windings wound individually on said rotor magnetic poles.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 19, 2008
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideaki Arita, Masaya Inoue, Yoshihito Asao, Tsunenobu Yamamoto
  • Publication number: 20070290647
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Application
    Filed: August 8, 2007
    Publication date: December 20, 2007
    Inventors: Takahiro URAKABE, Tsunenobu Yamamoto, Yoshihito Asao
  • Patent number: 7294984
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 13, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takahiro Urakabe, Tsunenobu Yamamoto, Yoshihito Asao
  • Publication number: 20070090713
    Abstract: A hybrid-excited rotating machine comprising: a stator winding 12 of a multi-phase Y-connection; a plurality of rotor magnetic poles 21, 22, 23, 24, 25, 26, 27, 28 fixed on a rotor shaft 3 at a predetermined spacing in the circumferential direction and confronting the inner circumference of said stator 1 through a air gap; a plurality of permanent magnets 51, 52, 53, 54, 55, 56, 57, 58 fixed at substantially central portions of said circumferential direction of said individual rotor magnetic poles and magnetized in the radial direction of said rotor shaft; and a plurality of field windings 61, 62, 63, 64, 65, 66, 67, 68 wound individually on said rotor magnetic poles.
    Type: Application
    Filed: September 15, 2006
    Publication date: April 26, 2007
    Inventors: Hideaki Arita, Masaya Inoue, Yoshihito Asao, Tsunenobu Yamamoto
  • Publication number: 20060108957
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Application
    Filed: November 18, 2005
    Publication date: May 25, 2006
    Inventors: Takahiro Urakabe, Tsunenobu Yamamoto, Yoshihito Asao
  • Patent number: 6888329
    Abstract: A method of controlling an electric rotating machine for a vehicle includes an electric rotating machine (1) including a rotator having a field winding (5) and a stator having an armature winding (3), a field current controller (9) for controlling a field current supplied from a direct-current power supply to the field winding (5), and a power converter (6) for converting a direct-current power into an alternating-current power and applying the power to the armature winding (3). When the field current controller (9) starts to supply a current to the field winding (5) for starting an internal combustion engine, the power converter (6) supplies a power to the armature winding (3) so that magnetic flux in a direction opposite to that generated by the field winding (5) is generated simultaneously with or immediately before starting the power supply.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: May 3, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaya Inoue, Haruyuki Kometani, Toshiyuki Yoshizawa, Masahiko Fujita, Tsunenobu Yamamoto, Yoshihito Asao, Shinji Nishimura
  • Publication number: 20040080291
    Abstract: A control method of controlling an electric rotating machine for vehicle includes an electric rotating machine 1 comprised of a rotator having a field winding 5 and a stator having an armature winding 3, a field current controller 9 for controlling a field current supplied from a direct-current power supply to the field winding 5, and a power converter 6 for converting a direct-current power into an alternating-current power and applying the power to the armature winding 3. When the field current controller 9 starts to supply a current to the field winding 5 for starting an internal combustion engine, the power converter 6 supplies a power to the armature winding 3 so that magnetic flux in a direction opposite to that generated by the field winding 5 is generated simultaneously with or immediately before starting the power supply.
    Type: Application
    Filed: June 11, 2003
    Publication date: April 29, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Masaya Inoue, Haruyuki Kometani, Toshiyuki Yoshizawa, Masahiko Fujita, Tsunenobu Yamamoto, Yoshihito Asao, Shinji Nishimura
  • Patent number: 6707277
    Abstract: A method of controlling a claw-pole synchronous machine with enhanced controllability without incurring additional expensiveness. Operation of the claw-pole synchronous machine is controlled through a vector control of an armature voltage and an armature current supplied from an inverter power source in combination with a field current control. When the claw-pole synchronous machine is operated as a generator, the field current is controlled on the basis of a demanded output power and rotation speed of the claw-pole synchronous machine while a field weakening control with the armature current (id) is performed by controlling magnitude and a phase difference angle (Ø) of the armature current (id).
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: March 16, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinji Nishimura, Tsunenobu Yamamoto
  • Publication number: 20020084773
    Abstract: A method of controlling a claw-pole synchronous machine with enhanced controllability without incurring additional expensiveness. Operation of the claw-pole synchronous machine is controlled through a vector control of an armature voltage and an armature current supplied from an inverter power source in combination with a field current control. When the claw-pole synchronous machine is operated as a generator, the field current is controlled on the basis of a demanded output power and rotation speed of the claw-pole synchronous machine while a field weakening control with the armature current (id) is performed by controlling magnitude and a phase difference angle (Ø) of the armature current (id).
    Type: Application
    Filed: October 26, 2001
    Publication date: July 4, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Shinji Nishimura, Tsunenobu Yamamoto
  • Patent number: 6333577
    Abstract: An automotive AC dynamo-electric machine is capable of providing a sufficient rotational output for starting an engine by running a rotor at high speed in a motor operation mode for starting the engine, thus obviating the need for increasing a size thereof. In the motor operation mode, an electromagnetic clutch follower connects to an electromagnetic clutch main body and also engages a cylindrical member to brake the cylindrical member. An internal gear portion provides a fixed element, and torque of a rotor is transmitted to a power transmission device via a rotor shaft, a sun gear, a planetary gear, and a carrier.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: December 25, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiko Kusumoto, Tsunenobu Yamamoto, Keiichi Konishi, Yoshinobu Utsumi