Patents by Inventor Kyohei Watanabe
Kyohei Watanabe 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).
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Patent number: 12143046Abstract: Provided is a method for detecting a ripple voltage. A control device is provided with: an acquiring unit which acquires the voltage value of an input voltage of a battery-driven electric compressor at irregular intervals; and a waveform computing unit which computes the waveform of a ripple component of the input voltage on the basis of the acquired voltage value.Type: GrantFiled: October 20, 2020Date of Patent: November 12, 2024Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto Hattori, Toyohisa Kawashima, Kyohei Watanabe
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Patent number: 12126291Abstract: Provided is a method for determining the generation source of ripple voltage when abnormal ripple voltage is detected. The control device is for an electric compressor, the control device comprising: a detection unit that detects ripple voltage; a judgment unit that judges whether the ripple voltage is abnormal based on the value of the ripple voltage; and a cause determination unit that determines whether the cause of the abnormality is the electric compressor or some other external device, based on the control result of the electric compressor.Type: GrantFiled: October 20, 2020Date of Patent: October 22, 2024Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto Hattori, Toyohisa Kawashima, Kyohei Watanabe
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Patent number: 12015330Abstract: This vehicle-mounted electric compressor is provided with a compressor body including a motor for compressing a refrigerant, and an inverter including a power element for supplying the motor with electric current. The power element is provided with: a metal substrate having an electrically conductive layer in a partial region of the surface thereof; a heat-generating element having a metal layer solder-fixed to the electrically conductive layer; and a resin substrate which is disposed in parallel with the metal substrate in a plate thickness direction of the metal substrate, and has a metal pattern printed on the surface thereof, the metal pattern having an electronic component mounted thereon. The electronic component and a terminal of the heat-generating element are connected by means of the metal pattern.Type: GrantFiled: April 16, 2020Date of Patent: June 18, 2024Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Masato Ito, Hiroto Higuchi, Kyohei Watanabe, Sachiko Nakao, Koji Nakano
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Publication number: 20240178783Abstract: This control device controls an inverter for driving a load, the control device comprising: a first generation unit for generating a first signal for performing two-phase modulation if a three-phase alternating current voltage for driving the load is generated; an acquisition unit for acquiring the weight of the load; a storage unit for storing corresponding relationships between the weight of the load and a phase shift amount of the first signal; an identification unit for identifying the phase shift amount corresponding to the weight of the load acquired by the acquisition unit in the corresponding relationship; and a second generation unit for generating a second signal in which the phase shift amount has been altered from the first signal on the basis of the phase shift amount identified by the identification unit.Type: ApplicationFiled: February 8, 2022Publication date: May 30, 2024Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Hiroaki YAMATO, Kyohei WATANABE, Makoto HATTORI
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Publication number: 20240166024Abstract: This electric compressor control device comprises: a control unit of an inverter which controls a motor that drives a compressor; a physical quantity calculation unit which calculates, on the basis of one or a plurality of predetermined detection values acquired from the inverter, a physical quantity that varies depending on a workload of the compressor; a number-of-revolutions acquisition unit which acquires the number of revolutions of the motor; a storage unit which stores information representing a first threshold that varies depending on the number of revolutions of the motor, and defines whether or not the physical quantity is a normal value; and a refrigerant abnormality determination unit which determines whether or not there is an abnormality in a refrigerant system by comparing the calculated physical quantity with the first threshold, depending on the acquired number of revolutions.Type: ApplicationFiled: May 12, 2022Publication date: May 23, 2024Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Kyohei WATANABE, Akinori YOSHIOKA, Makoto TAKEUCHI, Tomoki HASE, Takashi MITSUMATA, Shinya HAMAMOTO
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Publication number: 20240102465Abstract: Provided is a method for continuing the operation of an electric compressor even if the magnitude of ripple voltage exceeds a predetermined threshold value. A control device of an electric compressor is provided with: a detection unit for detecting the ripple voltage of the electric compressor which is driven by a battery; a determination unit for determining whether or not the value of the ripple voltage is greater than or equal to a predetermined threshold value; and a control unit for reducing the rotation speed of a motor of the electric compressor down to a predetermined first target rotation speed greater than 0 when the value is greater than or equal to the threshold value.Type: ApplicationFiled: October 19, 2020Publication date: March 28, 2024Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Toyohisa KAWASHIMA, Kyohei WATANABE
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Publication number: 20240088818Abstract: Provided is a method for determining the generation source of ripple voltage when abnormal ripple voltage is detected. The control device is for an electric compressor, the control device comprising: a detection unit that detects ripple voltage; a judgment unit that judges whether the ripple voltage is abnormal based on the value of the ripple voltage; and a cause determination unit that determines whether the cause of the abnormality is the electric compressor or some other external device, based on the control result of the electric compressor.Type: ApplicationFiled: October 20, 2020Publication date: March 14, 2024Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Toyohisa KAWASHIMA, Kyohei WATANABE
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Publication number: 20240079985Abstract: Provided is a method for detecting a ripple voltage. A control device is provided with: an acquiring unit which acquires the voltage value of an input voltage of a battery-driven electric compressor at irregular intervals; and a waveform computing unit which computes the waveform of a ripple component of the input voltage on the basis of the acquired voltage value.Type: ApplicationFiled: October 20, 2020Publication date: March 7, 2024Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Toyohisa KAWASHIMA, Kyohei WATANABE
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Patent number: 11606543Abstract: An image processing apparatus for controlling white balance of an image is provided. The apparatus detects a white region from image data and calculates a first white balance correction value based on data of the white region. The apparatus also detects, with use of machine learning, a region of a subject that has a preset specific color, from the image data, and calculates a second white balance correction value based on a color of the region of the subject. The apparatus calculates a white balance correction value to be applied to the image data, based on the first white balance correction value and the second white balance correction value.Type: GrantFiled: February 19, 2021Date of Patent: March 14, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Kyohei Watanabe
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Patent number: 11413937Abstract: A current estimating device that estimates a capacitor current of a high-voltage circuit for driving a motor, wherein the current estimating device calculates a voltage utilization rate using the input voltage of an inverter included in the high-voltage circuit and the speed of the motor, calculates a first constant by applying the voltage utilization rate to a predetermined first arithmetic expression, and calculates the capacitor current of an electrical condenser included in the high-voltage circuit by multiplying the first constant by a motor current effective value.Type: GrantFiled: August 15, 2018Date of Patent: August 16, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto Hattori, Hiroyuki Kamitani, Hiroto Higuchi, Masahiro Mori, Kyohei Watanabe
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Patent number: 11418136Abstract: A motor control device provided with a control unit which controls the number of rotations of a motor by implementing a first control which enables high-torque and precise control, or a second control enabling more efficient control than the first control with respect to the motor; and a switching determination unit which, if an actual measurement value of the number of rotations of the motor is greater than a prescribed threshold value of the number of rotations, switches the first control to the second control. The switching determination unit further switches the first control to the second control if the actual measurement value of the number of rotations is not more than the threshold value of the number of rotations, and when a prescribed time has passed from a point in time at which the actual measurement value of the number of rotations matched the required number of rotations.Type: GrantFiled: October 24, 2018Date of Patent: August 16, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto Hattori, Takayuki Takashige, Kyohei Watanabe
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Publication number: 20220181948Abstract: This vehicle-mounted electric compressor is provided with a compressor body including a motor for compressing a refrigerant, and an inverter including a power element for supplying the motor with electric current. The power element is provided with: a metal substrate having an electrically conductive layer in a partial region of the surface thereof; a heat-generating element having a metal layer solder-fixed to the electrically conductive layer; and a resin substrate which is disposed in parallel with the metal substrate in a plate thickness direction of the metal substrate, and has a metal pattern printed on the surface thereof, the metal pattern having an electronic component mounted thereon. The electronic component and a terminal of the heat-generating element are connected by means of the metal pattern.Type: ApplicationFiled: April 16, 2020Publication date: June 9, 2022Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Masato ITO, Hiroto HIGUCHI, Kyohei WATANABE, Sachiko NAKAO, Koji NAKANO
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Publication number: 20220166345Abstract: An embodiment of the present invention provides a control device comprising: an electric detection unit which detects an electric physical quantity relating to a head capacitor provided between a DC power supply and an inverter switching element; and a protection control unit which controls the inverter switching element in accordance with a change in the electric physical quantity so that no electric current flows to the head capacitor.Type: ApplicationFiled: March 11, 2020Publication date: May 26, 2022Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Kyohei WATANABE, Takayuki TAKASHIGE
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Patent number: 11146201Abstract: A current value determination device provided with: a capacitor current computation unit for computing the capacitor current of a capacitor included in a high-voltage circuit that drives a motor, on the basis of the input voltage of an inverter included in the high-voltage circuit and the revolution speed of the motor; and a capacitor current determination unit for determining the value of capacitor current on the basis of the input voltage of the inverter, the revolution speed of the motor, the capacitor current computed by the capacitor current computation unit, and a prescribed model for determination.Type: GrantFiled: August 15, 2018Date of Patent: October 12, 2021Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto Hattori, Takayuki Takashige, Kyohei Watanabe
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Publication number: 20210266507Abstract: An image processing apparatus for controlling white balance of an image is provided. The apparatus detects a white region from image data and calculates a first white balance correction value based on data of the white region. The apparatus also detects, with use of machine learning, a region of a subject that has a preset specific color, from the image data, and calculates a second white balance correction value based on a color of the region of the subject. The apparatus calculates a white balance correction value to be applied to the image data, based on the first white balance correction value and the second white balance correction value.Type: ApplicationFiled: February 19, 2021Publication date: August 26, 2021Inventor: Kyohei Watanabe
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Publication number: 20210155080Abstract: A current estimating device that estimates a capacitor current of a high-voltage circuit for driving a motor, wherein the current estimating device calculates a voltage utilization rate using the input voltage of an inverter included in the high-voltage circuit and the speed of the motor, calculates a first constant by applying the voltage utilization rate to a predetermined first arithmetic expression, and calculates the capacitor current of an electrical condenser included in the high-voltage circuit by multiplying the first constant by a motor current effective value.Type: ApplicationFiled: August 15, 2018Publication date: May 27, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Hiroyuki KAMITANI, Hiroto HIGUCHI, Masahiro MORI, Kyohei WATANABE
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Publication number: 20200313582Abstract: This motor control device is provided with: a control unit which controls the number of rotations of a motor in accordance with a required number of rotations by implementing a first control which enables high-torque and precise control with respect to the motor, or a second control enabling more efficient control than the first control with respect to the motor; and a switching determination unit which, if an actual measurement value of the number of rotations of the motor is greater than a prescribed threshold value of the number of rotations, switches the first control to the second control. The switching determination unit further switches the first control to the second control if the actual measurement value of the number of rotations is not more than the threshold value of the number of rotations, and when a prescribed time has passed from a point in time at which the actual measurement value of the number of rotations matched the required number of rotations.Type: ApplicationFiled: October 24, 2018Publication date: October 1, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Takayuki TAKASHIGE, Kyohei WATANABE
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Publication number: 20200244205Abstract: A current value determination device provided with: a capacitor current computation unit for computing the capacitor current of a capacitor included in a high-voltage circuit that drives a motor, on the basis of the input voltage of an inverter included in the high-voltage circuit and the revolution speed of the motor; and a capacitor current determination unit for determining the value of capacitor current on the basis of the input voltage of the inverter, the revolution speed of the motor, the capacitor current computed by the capacitor current computation unit, and a prescribed model for determination.Type: ApplicationFiled: August 15, 2018Publication date: July 30, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Makoto HATTORI, Takayuki TAKASHIGE, Kyohei WATANABE
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Patent number: 10673348Abstract: To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor (1) that compresses and discharges a refrigerant suctioned therein, includes an inverter device (2) provided with a circuit board (60) mounted with an inverter circuit (40), the inverter device (2) being integrally incorporated in an inverter case. The circuit board (60) is provided with a current detection circuit (30) that detects an input current flowing through the inverter circuit (40), and an offset correction circuit (20). The current detection circuit (30) includes a shunt resistor (32) that is serially connected to the inverter circuit (40) and detects a current, and a first amplifier (31) that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (32).Type: GrantFiled: August 22, 2016Date of Patent: June 2, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Masato Ito, Kenichi Aiba, Takashi Nakagami, Kyohei Watanabe, Naoki Nishikawa, Katsuhiro Saito, Kenji Shimizu
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Patent number: 10608547Abstract: To improve the accuracy of detecting a current flowing through an electric compressor after operation of the electric compressor, the electric compressor having a large change in temperature before and after operation. An inverter-integrated electric compressor (1) that compresses and discharges a refrigerant suctioned therein, includes an inverter device (2) provided with a circuit board (60) mounted with an inverter circuit (40), the inverter device (2) being integrally incorporated in an inverter case. The circuit board (60) is provided with a current detection circuit (30) that detects an input current flowing through the inverter circuit (40), and an offset correction circuit (20). The current detection circuit (30) includes a shunt resistor (32) that is serially connected to the inverter circuit (40) and detects a current, and a first amplifier (31) that amplifies and outputs a voltage appearing as a voltage drop in the shunt resistor (32).Type: GrantFiled: August 22, 2016Date of Patent: March 31, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.Inventors: Masato Ito, Kenichi Aiba, Takashi Nakagami, Kyohei Watanabe, Naoki Nishikawa, Katsuhiro Saito, Kenji Shimizu