Patents by Inventor Michio Yamada

Michio Yamada 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: 10318945
    Abstract: A POS-terminal device includes: a housing that is provided with a product-reading device including an imaging unit configured to capture a product to generate an image; a product-input unit configured to input the product, the product-input unit including a product-reading frame configured to define an outer edge of an imaging area of the imaging unit; and a reflector configured to reflect a subject image of the product passed over the imaging area, outside the housing.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: June 11, 2019
    Assignee: NEC Corporation
    Inventors: Kazuki Tsuchimochi, Kota Iwamoto, Tetsuo Inoshita, Soma Shiraishi, Hiroshi Yamada, Jun Kobayashi, Eiji Muramatsu, Michio Nagai, Hideo Yokoi
  • Publication number: 20190170798
    Abstract: The radiated noise of a semiconductor device is conveniently evaluated, and the radiated noise of an apparatus equipped with the semiconductor device is estimated. An evaluation method including: making a semiconductor device that is connected parallel to a load by a load cable, perform a switching operation; measuring common-mode current flowing through the load cable during the switching operation; and outputting an evaluation benchmark for radiated noise based on the common-mode current, and an evaluation apparatus are provided.
    Type: Application
    Filed: January 29, 2019
    Publication date: June 6, 2019
    Inventors: Hiroki KATSUMATA, Michio TAMATE, Miwako FUJITA, Tamiko ASANO, Yuhei SUZUKI, Takashi KAIMI, Yuta SUNASAKA, Tadanori YAMADA, Ryu ARAKI, Bao Cong HIU
  • Publication number: 20190170807
    Abstract: The radiated noise of a semiconductor device is conveniently evaluated, and the radiated noise of an apparatus equipped with the semiconductor device is estimated. An evaluation method and an evaluation apparatus are provided, including: causing a semiconductor device to perform a switching operation; measuring voltage variation occurring between main terminals of the semiconductor device during the switching operation; and outputting an evaluation benchmark for radiated noise of the semiconductor device based on the voltage variation. The outputting the evaluation benchmark may include calculating the voltage variation in the semiconductor device for each frequency component as the evaluation benchmark.
    Type: Application
    Filed: January 29, 2019
    Publication date: June 6, 2019
    Inventors: Hiroki KATSUMATA, Michio TAMATE, Miwako FUJITA, Tamiko ASANO, Yuhei SUZUKI, Takashi KAIMI, Yuta SUNASAKA, Tadanori YAMADA, Ryu ARAKI, Bao Cong HIU
  • Publication number: 20190067973
    Abstract: An EV-PCS, which is a charger/discharger, includes: a power converter, which is a charging/discharging unit that controls at least one of charging a storage battery mounted on an EV and discharging the storage battery; a charging/discharging cable extending from the power converter; and a charging/discharging connector for connecting the charging/discharging cable to the EV. The charging/discharging connector includes a temperature detection element having a surface covered with resin, the temperature detection element detecting the internal temperature of the charging/discharging connector. The power converter reduces a value of current flowing to the charging/discharging cable during the charge or discharge of the storage battery as the temperature detected by the temperature detection element rises.
    Type: Application
    Filed: April 13, 2016
    Publication date: February 28, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Michio YAMADA
  • Patent number: 10027268
    Abstract: A motor incorporating a power converter including a printed board on which a semiconductor module (an inverter IC), which converts a voltage of an external power supply into a high-frequency voltage and supplies the high-frequency voltage to a stator, is mounted, wherein a high-voltage circuit ground, which is a power ground of a high-voltage main circuit system of the inverter IC, and a low-voltage circuit ground, which is a ground of a control circuit system, which is a low-voltage circuit, of the semiconductor module, are provided on the board, and the high-voltage circuit ground and the low-voltage circuit ground are connected at one point via a resistor.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: July 17, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Yosuke Shinomoto, Hiroki Aso, Hiroyuki Ishii, Junichiro Oya
  • Patent number: 9929670
    Abstract: A power conversion device is configured to have reactors and is configured to have chopper circuit units, connected in series, that chop the output of a rectifier configured to rectify an AC voltage from an AC power supply. The power conversion device includes: an AC switch disposed on a side closer to the AC power supply than the chopper circuit units; an AC reactor that is connected in parallel to the AC switch; and a switching control unit that stops the switching of the switching elements when the contact of the AC switch is open.
    Type: Grant
    Filed: May 26, 2014
    Date of Patent: March 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Takuya Shimomugi, Yosuke Shinomoto, Mitsuo Kashima, Shigeo Umehara
  • Patent number: 9847735
    Abstract: A power conversion device includes a switching control unit that controls respective switching elements constituting a plurality of chopper circuits, a rectified-voltage detection unit, a bus-bar voltage detection unit, and a bus-bar current detection unit. The switching control unit includes an on-duty calculation unit that calculates a reference on-duty of respective drive pulses with respect to the switching elements based on a bus-bar voltage and a bus-bar current, an on-duty correction unit that corrects the reference on-duty to output on-duties of the respective drive pulses based on the bus-bar current, so that change amounts of respective reactor currents become substantially the same, and a drive-pulse generation unit that generates the respective drive pulses, based on the respective on-duties.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 19, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Michio Yamada, Yosuke Shinomoto, Mitsuo Kashima, Shigeo Umehara
  • Patent number: 9819297
    Abstract: A power conversion device includes a printed circuit board, whose mounting surface is opposite to an annular surface formed by an annular stator that constitutes a motor, arranged to be separated from the annular surface with a predetermined distance, and mounted with a Hall element that detects a rotation position of a rotor of the motor on a mounting surface on a side of the stator; an inverter IC that is mounted on the mounting surface on the side of the stator of the printed circuit board to supply a high-frequency current to the stator; and an overheat detection unit that is mounted on the mounting surface on the side of the stator of the printed circuit board and detects an overheated state of the inverter IC. When the overheat detection unit detects an overheated state, the inverter IC restricts or stops a current to be supplied to the stator.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: November 14, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Mineo Yamamoto, Hiroyuki Ishii, Tomoyuki Hasegawa
  • Patent number: 9806594
    Abstract: A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: October 31, 2017
    Assignee: MITSUBISHI CORPORATION
    Inventors: Yosuke Shinomoto, Michio Yamada, Kazunori Hatakeyama, Takuya Shimomugi
  • Patent number: 9698656
    Abstract: A motor incorporating a power converter that includes a printed board on which an inverter IC, which converts a voltage of an external power supply into a high-frequency voltage and supplies the high-frequency voltage to a stator, is mounted, wherein on a surface of the printed board opposed to the stator, a high-voltage direct-current input wire, which is a copper foil provided on a surface on a stator side, is disposed. One end of the high-voltage direct-current input wire is electrically connected to a high-voltage input line of the external power supply and the other end of the high-voltage direct-current input wire is electrically connected to a high-voltage electrode of the inverter IC.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: July 4, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Junichiro Oya, Hiroki Aso, Hiroyuki Ishii
  • Publication number: 20170165313
    Abstract: A composition and method are disclosed for ameliorating infertility, the composition an extract of one or both of pericarp and fruit of a plant of the genus Trapa, or one or compounds isolated therefrom, as the active ingredient that is safe and has high activity, in which the one or more compounds preferably has an inhibition activity against one or more reactions involving a formation of advanced glycation end products from proteins and saccharides, an enhancing activity against one or more reactions involving a decomposition of the advanced glycation end products and an activity to reduce allergic symptoms.
    Type: Application
    Filed: January 28, 2016
    Publication date: June 15, 2017
    Inventors: Masao Jinno, Michio Yamada, Shoko Takeshita, Tomohiro Uemura
  • Publication number: 20160087547
    Abstract: A power conversion device is configured to have reactors and is configured to have chopper circuit units, connected in series, that chop the output of a rectifier configured to rectify an AC voltage from an AC power supply. The power conversion device includes: an AC switch disposed on a side closer to the AC power supply than the chopper circuit units; an AC reactor that is connected in parallel to the AC switch; and a switching control unit that stops the switching of the switching elements when the contact of the AC switch is open.
    Type: Application
    Filed: May 26, 2014
    Publication date: March 24, 2016
    Inventors: Michio YAMADA, Takuya SHIMOMUGI, Yosuke SHINOMOTO, Mitsuo KASHIMA, Shigeo UMEHARA
  • Patent number: 9231507
    Abstract: A motor driving circuit includes a magnetic-pole-position detecting unit that detects a rotating position of a rotor of a permanent magnet synchronous motor, a voltage output unit that converts a direct-current voltage and generates a driving voltage for the permanent magnet synchronous motor, a voltage control unit that controls the voltage output unit on the basis of a comparison result of a modulation wave and a carrier wave, a voltage-phase adjusting unit that determines, using a differential amplifier circuit that receives a rotating speed control signal and an offset signal, a phase of the modulation wave generated by the voltage control unit and causes the voltage control unit to generate the modulation wave in the determined phase, and an offset generating unit that generates the offset signal.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: January 5, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Michio Yamada, Hiroki Aso
  • Publication number: 20150121929
    Abstract: A motor incorporating a power converter including a printed board on which a semiconductor module (an inverter IC), which converts a voltage of an external power supply into a high-frequency voltage and supplies the high-frequency voltage to a stator, is mounted, wherein a high-voltage circuit ground, which is a power ground of a high-voltage main circuit system of the inverter IC, and a low-voltage circuit ground, which is a ground of a control circuit system, which is a low-voltage circuit, of the semiconductor module, are provided on the board, and the high-voltage circuit ground and the low-voltage circuit ground are connected at one point via a resistor.
    Type: Application
    Filed: June 8, 2012
    Publication date: May 7, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Yosuke Shinomoto, Hiroki Aso, Hiroyuki Ishii, Junichiro Oya
  • Publication number: 20150102759
    Abstract: A power conversion device includes a switching control unit that controls respective switching elements constituting a plurality of chopper circuits, a rectified-voltage detection unit, a bus-bar voltage detection unit, and a bus-bar current detection unit. The switching control unit includes an on-duty calculation unit that calculates a reference on-duty of respective drive pulses with respect to the switching elements based on a bus-bar voltage and a bus-bar current, an on-duty correction unit that corrects the reference on-duty to output on-duties of the respective drive pulses based on the bus-bar current, so that change amounts of respective reactor currents become substantially the same, and a drive-pulse generation unit that generates the respective drive pulses, based on the respective on-duties.
    Type: Application
    Filed: February 26, 2013
    Publication date: April 16, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Michio Yamada, Yosuke Shinomoto, Mitsuo Kashima, Shigeo Umehara
  • Publication number: 20150002061
    Abstract: A motor driving circuit includes a magnetic-pole-position detecting unit that detects a rotating position of a rotor of a permanent magnet synchronous motor, a voltage output unit that converts a direct-current voltage and generates a driving voltage for the permanent magnet synchronous motor, a voltage control unit that controls the voltage output unit on the basis of a comparison result of a modulation wave and a carrier wave, a voltage-phase adjusting unit that determines, using a differential amplifier circuit that receives a rotating speed control signal and an offset signal, a phase of the modulation wave generated by the voltage control unit and causes the voltage control unit to generate the modulation wave in the determined phase, and an offset generating unit that generates the offset signal.
    Type: Application
    Filed: January 27, 2012
    Publication date: January 1, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Michio Yamada, Hiroki Aso
  • Publication number: 20140320059
    Abstract: A converter circuit capable of being compact and light-weight and capable of reducing switching loss, a motor drive control apparatus, an air-conditioner, a refrigerator, and an induction heating cooker provided with the circuit. The converter circuit including: a step-up converter including a rectifier, a step-up reactor, a switching element, and a reverse current prevention element; a step-up converter having a step-up reactor, a switching element, and a reverse current prevention element and connected in parallel with the step-up converter; switching control unit that controls switching elements; and a smoothing capacitor that is provided at the output of the step-up converters. The switching control unit switches the current mode of the current flowing through the step-up reactors into any of a continuous mode, a critical mode, and a discontinuous mode based on a predetermined condition.
    Type: Application
    Filed: July 11, 2014
    Publication date: October 30, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takuya SHIMOMUGI, Yosuke Shinomoto, Kazunori Sakanobe, Michio Yamada, Kazunori Hatakeyama
  • Publication number: 20140311716
    Abstract: A motor incorporating a power converter that includes a printed board on which an inverter IC, which converts a voltage of an external power supply into a high-frequency voltage and supplies the high-frequency voltage to a stator, is mounted, wherein on a surface of the printed board opposed to the stator, a high-voltage direct-current input wire, which is a copper foil provided on a surface on a stator side, is disposed. One end of the high-voltage direct-current input wire is electrically connected to a high-voltage input line of the external power supply and the other end of the high-voltage direct-current input wire is electrically connected to a high-voltage electrode of the inverter IC.
    Type: Application
    Filed: December 13, 2011
    Publication date: October 23, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventors: Michio Yamada, Junichiro Oya, Hiroki Aso, Hiroyuki Ishii
  • Publication number: 20140286069
    Abstract: A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on.
    Type: Application
    Filed: November 2, 2011
    Publication date: September 25, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yosuke Shinomoto, Michio Yamada, Kazunori Hatakeyama, Takuya Shimomugi
  • Patent number: 8817506
    Abstract: A converter circuit including a step-up converter including a rectifier, a step-up reactor, a switching element, and a reverse current prevention element; a step-up converter having a step-up reactor, a switching element, and a reverse current prevention element and connected in parallel with the step-up converter; a switching control unit that controls switching elements; and a smoothing capacitor that is provided at the output of the step-up converters. The switching control unit switches the current mode of the current flowing through the step-up reactors into any of a continuous mode, a critical mode, and a discontinuous mode based on a predetermined condition.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: August 26, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Yosuke Shinomoto, Kazunori Sakanobe, Michio Yamada, Kazunori Hatakeyama