Patents by Inventor Tsutomu Makino

Tsutomu Makino 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: 10427490
    Abstract: The present disclosure discloses a rooftop air conditioning unit for a bus or other vehicle. The air conditioning unit includes a frame, a condenser section mounted on the frame and a HVAC section mounted on the frame. The condenser section is positioned along a central longitudinal axis of the air conditioning unit, and the HVAC section is positioned in a distributed way on the two opposite sides of the condenser section and comprises at least one pair of HVAC modules, each of which includes a box-shaped base of plastic material mounted on the frame, inside which a respective blower, evaporator and heater are mounted.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: October 1, 2019
    Assignees: DENSO THERMAL SYSTEMS S.P.A., DENSO CORPORATION
    Inventors: Leone Contento, Massimo Di Tonno, Tsutomu Makino, Eiji Oguri, Tosiaki Okamoto
  • Patent number: 10345832
    Abstract: Examples of an insulation system include a digital isolator for receiving supply of a first power supply on an input side thereof and receiving supply of a second power supply on an output side thereof, and an output adjusting unit for receiving supply of the second power supply, directly outputting an output of the digital isolator when a voltage of the second power supply is larger than a predetermined voltage, and stopping data output irrespective of the output of the digital isolator when the voltage of the second power supply is smaller or equal to the predetermined voltage.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 9, 2019
    Assignee: ASM IP Holding B.V.
    Inventors: Phuc Hong Ninh, Tsutomu Makino
  • Publication number: 20190171674
    Abstract: In a memory, multiple pieces of entry data sorted in ascending or descending order are stored associated with addresses. With whole addresses for storing the multiple pieces of entry data as an initial search area, the search circuit repeatedly performs a search operation for comparing entry data stored in a central address of the search area with the search data, outputting the address as a search result in the case of a match, and narrowing the search area for the next search based on a magnitude comparison result in the case of a mismatch.
    Type: Application
    Filed: February 8, 2019
    Publication date: June 6, 2019
    Applicant: Renesas Electronics Corporation
    Inventor: Tsutomu Makino
  • Patent number: 10242124
    Abstract: In a memory, multiple pieces of entry data sorted in ascending or descending order are stored associated with addresses. With whole addresses for storing the multiple pieces of entry data as an initial search area, the search circuit repeatedly performs a search operation for comparing entry data stored in a central address of the search area with the search data, outputting the address as a search result in the case of a match, and narrowing the search area for the next search based on a magnitude comparison result in the case of a mismatch.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: March 26, 2019
    Assignee: Renesas Electronics Corporation
    Inventor: Tsutomu Makino
  • Patent number: 10208991
    Abstract: A heat pump device includes an inverter control unit for controlling an inverter. The inverter control unit includes a constraint-energization control unit that, during operation standby of a compressor, determines whether heating to the compressor is necessary, on the basis of a refrigeration stagnation amount in the compressor, and, when having determined that heating to the compressor is necessary, selects, according to the refrigeration stagnation amount, any one of direct-current energization for supplying a direct-current voltage to the motor and high-frequency energization for supplying a high-frequency voltage having a frequency higher than a frequency during a normal operation to the motor, so as to output a constraint energization command for carrying out constraint energization of the motor; and a driving-signal generating unit that generates a driving signal on the basis of the constraint energization command.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: February 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Syota Kamiya, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9903629
    Abstract: A heat pump device includes: a compressor including a compression mechanism compressing a refrigerant and a motor driving the compression mechanism; an inverter unit applying a voltage for driving the motor; an inverter control unit generating a driving signal for driving the inverter unit; and temperature sensors detecting temperatures of the compressor, wherein the inverter control unit includes a normal operation mode in which a refrigerant is compressed by performing a normal operation of the compressor and a heating operation mode in which a heating operation of the compressor is performed by applying, to the motor, a high-frequency voltage, and in the heating operation mode, the inverter control unit determines an amplitude and a phase of a voltage command for generating the high-frequency voltage on a basis of a temperatures detected by the temperature sensors and a necessary amount of heat specified in advance.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: February 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shota Kamiya, Kazunori Hatakeyama, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9829226
    Abstract: An object of the present invention is to maintain a heating amount constant when a compressor is heated at the time of shutdown of the compressor, regardless of the influences of production tolerance and environment variations. An inverter control unit causes an inverter to generate a high-frequency AC voltage having a de-energized section in which a voltage applied from the inverter to a motor is zero between a section in which the voltage is positive and a section in which the voltage is negative. At this time, the inverter control unit detects a value of a current flowing to the inverter in a detection section residing from immediately before a start of the de-energized section to immediately after an end of the de-energized section, and causes the inverter to generate a high-frequency AC voltage adjusted according to the detected current value.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: November 28, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Takuya Shimomugi, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9829234
    Abstract: A heat pump device includes an inverter control unit outputting PWM signals to an inverter; a current detection unit detecting a current value flowing in the inverter and outputting the current value after reducing a current value having a first frequency or higher in detected current value; and a drive-signal stop unit that, when the current value output from the current detection unit is equal to or larger than an interruption level, stops output of PWM signals to the inverter. Particularly, the inverter control unit generates a voltage command value such that the voltage command value becomes a value equal to or larger than a lower limit determined according to the first frequency and generates PWM signals based on generated voltage command value and a carrier signal, thereby causing a voltage output time to the motor to be a predetermined time or longer.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: November 28, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Syota Kamiya, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9746216
    Abstract: A heat pump device includes: a compressor that compresses a refrigerant; a motor that drives the compressor; a wiring switching unit that switches a wiring structure of the motor; an inverter that applies a desired voltage to the motor; and an inverter control unit that generates a PWM signal for driving the inverter, that includes, as an operation mode, a heating operation mode in which a heating operation is performed on the compressor and a normal operation mode in which a refrigerant is compressed by performing a normal operation on the compressor, and that controls a switching operation of the wiring switching unit in accordance with an operation mode.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 29, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Yamakawa, Kazunori Hatakeyama, Shota Kamiya, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9739515
    Abstract: A heat pump device includes a compressor including a compression mechanism that compresses a refrigerant and a motor that drives the compression mechanism, an inverter that applies a voltage for driving the motor, a converter that applies a voltage to the inverter, an inverter control unit that generates a driving signal for driving the inverter, and a converter control unit that generates a driving signal for driving the converter. The inverter control unit includes a heating-operation-mode control unit that controls a driving-signal generating unit such that the driving-signal generating unit outputs, as inverter driving signals, PWM signals for heating the compressor without rotationally driving the motor by feeding a high-frequency current that the motor cannot follow in a heating operation mode.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: August 22, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shota Kamiya, Kazunori Hatakeyama, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9651289
    Abstract: An adder adds a phase ?plus, which is n times a size of 60 degrees, to a phase output from a phase switching unit and outputs the phase as a voltage command phase ?. A voltage generation unit generates voltage command value based on the voltage command phase output by the adder and outputs the command value. A drive-signal generation unit, based on an output from the voltage generation unit generates drive signals corresponding to respective switching elements of an inverter, and outputs respective generated drive signals to the corresponding switching elements of the inverter, and generates a high-frequency AC voltage in the inverter.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: May 16, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Takuya Shimomugi, Shinya Matsushita, Naoki Wakuta, Tsutomu Makino, Shinsaku Kusube
  • Patent number: 9618249
    Abstract: A voltage-command correction-value computation unit outputs a correction value for correcting a voltage command value according to a bus voltage. A multiplier calculates a voltage command value acquired by correcting the voltage command value based on the correction value. A voltage-command generation unit generates and outputs three-phase voltage command values based on the corrected voltage command value calculated by the multiplier and a phase. A PWM-signal generation unit generates six drive signals corresponding to switching elements of an inverter based on the three-phase voltage command values outputted by the voltage-command generation unit and a carrier signal. The PWM-signal generation unit outputs the generated drive signals to the corresponding switching elements of the three-phase inverter, to cause the inerter to generate a high-frequency AC voltage.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: April 11, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9543887
    Abstract: A selection unit switches between a phase ?p and a phase ?n different from the phase ?p substantially by 180 degrees, and outputs one of them in synchronization with a carrier signal. A voltage-command generation unit generates and outputs three-phase voltage command values Vu*, Vv* and Vw* based on the phase outputted by the selection unit. A PWM-signal generation unit generates three-phase voltage command values Vu*?, Vv*? and Vw*? by correcting the three-phase voltage command values Vu*, Vv* and Vw* outputted by the voltage-command generation unit according to a predetermined method, and generates six drive signals corresponding to switching elements of the inverter based on the three-phase voltage command values Vu*?, Vv*? and Vw*? and the carrier signal. The PWM-signal generation unit outputs the generated drive signals to the corresponding switching elements of the three-phase inverter, to cause the inverter to generate a high-frequency AC voltage.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 10, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Takuya Shimomugi, Shinya Matsushita, Naoki Wakuta, Shinsaku Kusube, Tsutomu Makino
  • Patent number: 9496816
    Abstract: An air conditioner equipped with a compressor, an indoor heat exchanger and an outdoor heat exchanger includes: an inverter circuit that drives a motor of the compressor; an inverter-power detecting unit that detects power of the inverter circuit; a PWM-signal generating unit that inverter-current detecting unit generates PWM signals for controlling the inverter circuit; a voltage-command-value generating unit that outputs voltage command values to the PWM-signal generating unit; and an accumulation detecting unit that detects accumulation of a liquid refrigerant within the compressor and outputs a detection result to the voltage-command-value generating unit, wherein when accumulation of a liquid refrigerant within the compressor is detected, the voltage-command-value generating unit outputs the voltage command value so that power of the inverter circuit has a predetermined power value.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: November 15, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Kazunori Sakanobe, Shinya Matsushita, Tsutomu Makino
  • Patent number: 9263984
    Abstract: A high efficiency refrigerant compressor standby heating method reduces vibrations and noise in a bearing of the compressor. The compressor comprises a motor, an inverter, an inverter controller, and a bus voltage detector to detect a bus voltage of the inverter. The inverter controller includes a dormant refrigerant detector to detect a dormant state of refrigerant in the compressor, a high-frequency AC voltage generator to output a high-frequency AC voltage command, which is out of a range of an operating frequency when the compressor is running, to a coil of the motor on the basis of an output of the dormant refrigerant detector, an amplitude, and a phase. A pulse width modulation signal generator to cause the inverter to generate a high-frequency AC voltage by generating a signal on the basis of the output of the high-frequency AC voltage generator and the output of the bus voltage detector.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: February 16, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kazunori Hatakeyama, Kazunori Sakanobe, Shinya Matsushita, Tsutomu Makino
  • Publication number: 20150339222
    Abstract: In a memory, multiple pieces of entry data sorted in ascending or descending order are stored associated with addresses. With whole addresses for storing the multiple pieces of entry data as an initial search area, the search circuit repeatedly performs a search operation for comparing entry data stored in a central address of the search area with the search data, outputting the address as a search result in the case of a match, and narrowing the search area for the next search based on a magnitude comparison result in the case of a mismatch.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 26, 2015
    Applicant: RENESAS ELECTRONICS CORPORATION
    Inventor: Tsutomu MAKINO
  • Publication number: 20150202942
    Abstract: The present disclosure discloses a rooftop air conditioning unit for a bus or other vehicle. The air conditioning unit includes a frame, a condenser section mounted on the frame and a HVAC section mounted on the frame. The condenser section is positioned along a central longitudinal axis of the air conditioning unit, and the HVAC section is positioned in a distributed way on the two opposite sides of the condenser section and comprises at least one pair of HVAC modules, each of which includes a box-shaped base of plastic material mounted on the frame, inside which a respective blower, evaporator and heater are mounted.
    Type: Application
    Filed: January 15, 2015
    Publication date: July 23, 2015
    Inventors: Leone CONTENTO, Massimo DI TONNO, Tsutomu MAKINO, Eiji OGURI, Tosiaki OKAMOTO
  • Publication number: 20150168033
    Abstract: A heat pump device includes: a compressor that compresses a refrigerant; a motor that drives the compressor; a wiring switching unit that switches a wiring structure of the motor; an inverter that applies a desired voltage to the motor; and an inverter control unit that generates a PWM signal for driving the inverter, that includes, as an operation mode, a heating operation mode in which a heating operation is performed on the compressor and a normal operation mode in which a refrigerant is compressed by performing a normal operation on the compressor, and that controls a switching operation of the wiring switching unit in accordance with an operation mode.
    Type: Application
    Filed: June 29, 2012
    Publication date: June 18, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takashi Yamakawa, Kazunori Hatakeyama, Shota Kamiya, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Publication number: 20150096320
    Abstract: A heat pump device includes: a compressor including a compression mechanism compressing a refrigerant and a motor driving the compression mechanism; an inverter unit applying a voltage for driving the motor; an inverter control unit generating a driving signal for driving the inverter unit; and temperature sensors detecting temperatures of the compressor, wherein the inverter control unit includes a normal operation mode in which a refrigerant is compressed by performing a normal operation of the compressor and a heating operation mode in which a heating operation of the compressor is performed by applying, to the motor, a high-frequency voltage, and in the heating operation mode, the inverter control unit determines an amplitude and a phase of a voltage command for generating the high-frequency voltage on a basis of a temperatures detected by the temperature sensors and a necessary amount of heat specified in advance.
    Type: Application
    Filed: June 20, 2012
    Publication date: April 9, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shota Kamiya, Kazunori Hatakeyama, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino
  • Publication number: 20150089972
    Abstract: A heat pump device includes a compressor including a compression mechanism that compresses a refrigerant and a motor that drives the compression mechanism, an inverter that applies a voltage for driving the motor, a converter that applies a voltage to the inverter, an inverter control unit that generates a driving signal for driving the inverter, and a converter control unit that generates a driving signal for driving the converter, wherein the inverter control unit includes a heating operation mode in which a heating operation of the compressor is performed and a normal operation mode in which a refrigerant is compressed by performing a normal operation of the compressor and the converter control unit sets, in the heating operation mode of the inverter control unit, a voltage applied to the inverter on the basis of a voltage command value for the motor.
    Type: Application
    Filed: April 16, 2012
    Publication date: April 2, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shota Kamiya, Kazunori Hatakeyama, Kenta Yuasa, Shinya Matsushita, Shinsaku Kusube, Tsutomu Makino