Patents by Inventor Tatsuru Morioka

Tatsuru Morioka 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: 8446114
    Abstract: A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter. The control apparatus stores an angle of rotation (i.e., start angle ?0) of the electric rotating machine before start of control of energization of the electric rotating machine to discharge the capacitor and determines command currents idr and iqr which will result in zero (0) torque in the electric rotating machine. The control apparatus includes a command current correcting circuit which corrects the command currents idr and iqr by a difference between a current angle ? of rotation of the electric rotating machine and the start angle ?0, thereby avoiding constant rotation of the electric rotating machine when the capacitor is discharged.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 21, 2013
    Assignee: Denso Corporation
    Inventors: Hiroya Tsuji, Tatsuru Morioka, Hiroshi Inamura, Takahumi Oowada
  • Patent number: 8193743
    Abstract: A control device has a unit for preparing a pattern having first and second periods by comparing a triangular wave and a sine wave having an amplitude ratio set at each value of a modulation factor, and selecting one pattern corresponding to an instructed modulation factor, and a unit for applying a controlled voltage, set at low and high levels in response to first and second periods of the selected pattern, to a generator. The triangular wave has a cycle duration obtained by dividing the cycle duration of the generator by product of 3 and odd number, a crest having a level higher than the sine wave at a timing of each first period, and a trough having a level lower than the sine wave at a timing of each second period.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: June 5, 2012
    Assignee: Denso Corporation
    Inventors: Takahiro Yamada, Tatsuru Morioka, Junji Miyachi
  • Patent number: 8193749
    Abstract: A control device has a unit for determining a controlled phase of a controlled voltage outputted from an inverter to a generator according to a difference between a target torque and an estimated torque of the generator, a unit for calculating an instructed vector norm of the controlled voltage from the target torque, an electrical angular speed of the generator and parameters indicating characteristics of the generator, a unit for correcting the instructed norm to an adjusted vector norm such that a phase of current flowing through the generator in response to the controlled voltage set at the controlled phase and the adjusted norm is controlled to a phase of an instructed current determined from the target torque, and a unit for controlling the generator by controlling the inverter to output the controlled voltage set at the controlled phase and the adjusted norm to the generator.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: June 5, 2012
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Yamamoto, Tatsuru Morioka, Junji Miyachi
  • Publication number: 20110295530
    Abstract: The fault diagnosis device is for diagnosing presence of a fault in an amplitude modulation device which modulates an amplitude of a carrier wave signal to generate a modulated wave signal, comprising. The fault diagnosis device includes a sampling means to perform sampling of at least one of the carrier wave signal and the modulated wave signal at a period different from a period of the carrier wave signal, and a diagnosis means to perform diagnosis of presence of a fault in the amplitude modulation device based on sampled values outputted from the sampling means.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 1, 2011
    Applicant: DENSO CORPORATION
    Inventors: Takahumi OOWADA, Hiroya TSUJI, Tatsuru MORIOKA, Hiroshi INAMURA, Makoto OKAMURA
  • Publication number: 20110210687
    Abstract: A control apparatus for use with an electric power conversion system which is equipped with a dc/ac converter connected to an electric rotating machine and a capacitor joined to input terminals of the dc/ac converter. The control apparatus stores an angle of rotation (i.e., start angle ?0) of the electric rotating machine before start of control of energization of the electric rotating machine to discharge the capacitor and determines command currents idr and iqr which will result in zero (0) torque in the electric rotating machine. The control apparatus includes a command current correcting circuit which corrects the command currents idr and iqr by a difference between a current angle ? of rotation of the electric rotating machine and the start angle ?0, thereby avoiding constant rotation of the electric rotating machine when the capacitor is discharged.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 1, 2011
    Applicant: DENSO CORPORATION
    Inventors: Hiroya Tsuji, Tatsuru Morioka, Hiroshi Inamura, Takahumi Oowada
  • Publication number: 20100134056
    Abstract: A control device has a unit for determining a controlled phase of a controlled voltage outputted from an inverter to a generator according to a difference between a target torque and an estimated torque of the generator, a unit for calculating an instructed vector norm of the controlled voltage from the target torque, an electrical angular speed of the generator and parameters indicating characteristics of the generator, a unit for correcting the instructed norm to an adjusted vector norm such that a phase of current flowing through the generator in response to the controlled voltage set at the controlled phase and the adjusted norm is controlled to a phase of an instructed current determined from the target torque, and a unit for controlling the generator by controlling the inverter to output the controlled voltage set at the controlled phase and the adjusted norm to the generator.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 3, 2010
    Applicant: DENSO CORPORATION
    Inventors: Tsuyoshi YAMAMOTO, Tatsuru MORIOKA, Junji MIYACHI
  • Publication number: 20100134053
    Abstract: A control device has a unit for preparing a pattern having first and second periods by comparing a triangular wave and a sine wave having an amplitude ratio set at each value of a modulation factor, and selecting one pattern corresponding to an instructed modulation factor, and a unit for applying a controlled voltage, set at low and high levels in response to first and second periods of the selected pattern, to a generator. The triangular wave has a cycle duration obtained by dividing the cycle duration of the generator by product of 3 and odd number, a crest having a level higher than the sine wave at a timing of each first period, and a trough having a level lower than the sine wave at a timing of each second period.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 3, 2010
    Applicant: DENSO CORPORATION
    Inventors: Takahiro Yamada, Tatsuru Morioka, Junji Miyachi
  • Patent number: 7151354
    Abstract: The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times the frequency of the fundamental frequency component of a polyphase AC current fed to an armature of a polyphase AC rotary electric machine, is superimposed on the polyphase AC current, thereby reducing or altering a harmonic component having a frequency (n?1) times the frequency of the fundamental frequency component and occurring due to a radial magnetic excitation force acting radially on an iron core of the AC rotary electric machine.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: December 19, 2006
    Assignee: Denso Corporation
    Inventors: Soichi Yoshinaga, Kenichi Wakabayashi, Takatoshi Takai, Tatsuru Morioka, Hiroya Tsuji, Makoto Okamura, Shinobu Yamakawa
  • Publication number: 20050073280
    Abstract: The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times the frequency of the fundamental frequency component of a polyphase AC current fed to an armature of a polyphase AC rotary electric machine, is superimposed on the polyphase AC current, thereby reducing or altering a harmonic component having a frequency (n?1) times the frequency of the fundamental frequency component and occurring due to a radial magnetic excitation force acting radially on an iron core of the AC rotary electric machine.
    Type: Application
    Filed: June 16, 2004
    Publication date: April 7, 2005
    Applicant: DENSO CORPORATION
    Inventors: Soichi Yoshinaga, Kenichi Wakabayashi, Takatoshi Takai, Tatsuru Morioka, Hiroya Tsuji, Makoto Okamura, Shinobu Yamakawa
  • Patent number: 5789881
    Abstract: A power source control apparatus for parallel and series hybrid vehicles is provided. The power source control apparatus determines a required torque of a power source consisting of a generator-motor and an internal combustion engine based on a parameter indicating an operational mode of the vehicle and interrupts fuel supply to the internal combustion engine in a cycle based on the required torque of the power source so as to minimize a fuel consumption. The power source control apparatus further determines a required torque of the generator-motor based on the required torque of the power source and an output torque of the internal combustion engine to switch an operation mode of the generator-motor between a generator mode and a motor mode so as to compensate for a variation in output of the internal combustion engine during the cyclic fuel cut control.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: August 4, 1998
    Assignee: Denso Corporation
    Inventors: Tsuneyuki Egami, Yousuke Setaka, Tatsuru Morioka, Keiichiro Banzai
  • Patent number: 5614803
    Abstract: In order to reduce distortion of a real-current wave form and to suppress substantial transient fluctuation of the current and torque during changeover from a regeneration running condition to the power running condition of a three-phase induction motor, changeover from the three-phase-modulation control to the two-phase-modulation control is carried at the same time the power running condition of the motor is changed to the regeneration running condition according to the motor-state-quantum such as a detected slip ratio, detected torque, detected current or the like. Thus, distortion of the motor-current wave form is reduced and significant fluctuation of the motor-current and torque during the changeover is reduced.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: March 25, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Tatsuru Morioka, Tsuneyuki Egami