Patents by Inventor Yoshiyuki Taguchi
Yoshiyuki Taguchi 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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Publication number: 20240097589Abstract: A power conversion device comprising, a power converter that outputs signal to the motor to vary the motor's output frequency, output voltage and output current and control unit that controls the power converter, the control unit is, calculating the first power from the output voltage and output current, calculating the second power from the output current, electrical circuit parameters and frequency estimates, calculating the first phase error estimate so that the first power follows the second power in the first frequency domain, calculating the second phase error estimate different from the first frequency domain in a second frequency domain, controlling the frequency estimates so that the first phase error estimate or the second phase error estimate follows the command value of the phase error estimate.Type: ApplicationFiled: January 24, 2022Publication date: March 21, 2024Inventors: Kazuaki TOBARI, Yuta IWASE, Yoshiyuki TAGUCHI
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Patent number: 11575338Abstract: This power conversion device comprises: a power converter including a switching element; and a control unit which controls the power converter. The control unit calculates a torque electric current detection value and an excitation electric current detection value from an electric current flowing to an external device, and when an absolute value of the torque electric current detection value is greater than or equal to the excitation electric current detection value, performs control such that the excitation electric current detection value follows the torque electric current detection value.Type: GrantFiled: April 28, 2020Date of Patent: February 7, 2023Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Kazuaki Tobari, Agnes Hadinata, Atsuhiko Nakamura, Hiroshi Watanabe, Yusaku Onuma, Takuya Sugimoto, Yoshiyuki Taguchi
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Patent number: 11437944Abstract: A power conversion device includes a harmonic voltage generation unit that superimposes dc-axis and qc-axis harmonic voltages on dc-axis and qc-axis voltage commands in accordance with a switching signal; and an inductance estimation unit that estimates dc-axis inductance and qc-axis inductance on a basis of dc-axis and qc-axis harmonic currents, amplitude values of the harmonic voltages, and the switching signal.Type: GrantFiled: May 29, 2019Date of Patent: September 6, 2022Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Kazuaki Tobari, Yoshitaka Iwaji, Agnes Hadinata, Yusaku Onuma, Takuya Sugimoto, Atsuhiko Nakamura, Hiroshi Watanabe, Yoshiyuki Taguchi
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Publication number: 20220094291Abstract: This power conversion device comprises: a power converter including a switching element; and a control unit which controls the power converter. The control unit calculates a torque electric current detection value and an excitation electric current detection value from an electric current flowing to an external device, and when an absolute value of the torque electric current detection value is greater than or equal to the excitation electric current detection value, performs control such that the excitation electric current detection value follows the torque electric current detection value.Type: ApplicationFiled: April 28, 2020Publication date: March 24, 2022Inventors: Kazuaki TOBARI, Agnes HADINATA, Atsuhiko NAKAMURA, Hiroshi WATANABE, Yusaku ONUMA, Takuya SUGIMOTO, Yoshiyuki TAGUCHI
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Publication number: 20220055366Abstract: An image forming apparatus includes: an extraction unit configured to extract an image for position detection from job image data; a first image forming unit configured to form the image for position detection on a recording medium; a second image forming unit disposed on a downstream in a feeding direction of the recording medium relative to the first image forming unit; a first detection unit configured to detect the image for position detection formed by the first image forming unit; and a determining unit configured to determine a correction amount of an image forming position of the second image forming unit based on a position of the image for position detection that is detected by the detection unit and a position of the image for position detection in the image data.Type: ApplicationFiled: December 22, 2020Publication date: February 24, 2022Inventors: Chikara Manabe, Masato Matsuzuki, Yoshiyuki Taguchi, Kunio Miyakoshi, Maki Hasegawa, Masashi Hiratsuka
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Patent number: 11254122Abstract: An image forming apparatus includes: an extraction unit configured to extract an image for position detection from job image data; a first image forming unit configured to form the image for position detection on a recording medium; a second image forming unit disposed on a downstream in a feeding direction of the recording medium relative to the first image forming unit; a first detection unit configured to detect the image for position detection formed by the first image forming unit; and a determining unit configured to determine a correction amount of an image forming position of the second image forming unit based on a position of the image for position detection that is detected by the detection unit and a position of the image for position detection in the image data.Type: GrantFiled: December 22, 2020Date of Patent: February 22, 2022Assignee: FUJIFILM Business Innovation Corp.Inventors: Chikara Manabe, Masato Matsuzuki, Yoshiyuki Taguchi, Kunio Miyakoshi, Maki Hasegawa, Masashi Hiratsuka
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Patent number: 11214057Abstract: An ejection apparatus includes: a first ejection unit configured to eject droplets on a recording medium conveyed in a conveyance direction to form an image for detection; a first detection unit disposed downstream of the first ejection unit and configured to detect the image for detection; a second ejection unit disposed downstream of the detection unit and configured to eject droplets on the recording medium; and a control unit configured to: predict a first elongation amount of the recording medium based on a first difference between a first set time period and a first detection time period from a reference time point to a first detection time point when the image for detection is detected by the first detection unit; and perform delay control on the second ejection unit for delaying an ejection timing of the second ejection unit based on the predicted elongation amount.Type: GrantFiled: March 20, 2020Date of Patent: January 4, 2022Assignee: FUIFIIM Business Imovation Corp.Inventors: Masato Matsuzuki, Yoshiyuki Taguchi, Chikara Manabe, Kunio Miyakoshi, Maki Hasegawa
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Patent number: 11186100Abstract: An image processing apparatus includes a processor. The processor is configured to set an image position of a reference image in a transport direction of a recording medium to an arbitrary position on a specific page of the recording medium. The reference image is formed using a first color and serves as a reference for an image position of an image of a second color to be formed after the image of the first color is formed. The processor is also configured to adjust the image position for the second color on an adjacent page, located adjacently upstream of the specific page in the transport direction, by using image information of the reference image formed on the specific page.Type: GrantFiled: March 26, 2020Date of Patent: November 30, 2021Assignee: FUJIFILM Business Innovation Corp.Inventors: Maki Hasegawa, Kunio Miyakoshi, Masato Matsuzuki, Yoshiyuki Taguchi, Chikara Manabe
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Patent number: 11173736Abstract: An image forming apparatus includes an image forming unit, first and second detectors, and a corrector. The image forming unit includes first and second image forming units disposed downstream of the first unit in a transport direction of a recording medium and causes the first and second units to form predetermined correction images onto the recording medium. The first detector is disposed downstream of the first unit and upstream of the second unit in the transport direction, and detects the correction image formed by the first unit. The second detector is disposed downstream of the second unit in the transport direction and detects the correction image formed by the second unit. The corrector corrects an image position of the second unit in a width direction of the recording medium by using the correction images formed by the first and second units and detected by the first and second detectors.Type: GrantFiled: March 2, 2020Date of Patent: November 16, 2021Assignee: FUJIFILM Business Innovation Corp.Inventors: Kunio Miyakoshi, Masato Matsuzuki, Yoshiyuki Taguchi, Maki Hasegawa, Chikara Manabe
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Publication number: 20210273591Abstract: A power conversion device includes a harmonic voltage generation unit that superimposes dc-axis and qc-axis harmonic voltages on dc-axis and qc-axis voltage commands in accordance with a switching signal; and an inductance estimation unit that estimates dc-axis inductance and qc-axis inductance on a basis of dc-axis and qc-axis harmonic currents, amplitude values of the harmonic voltages, and the switching signal.Type: ApplicationFiled: May 29, 2019Publication date: September 2, 2021Inventors: Kazuaki TOBARI, Yoshitaka IWAJI, Agnes HADINATA, Yusaku ONUMA, Takuya SUGIMOTO, Atsuhiko NAKAMURA, Hiroshi WATANABE, Yoshiyuki TAGUCHI
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Publication number: 20210154996Abstract: An ejection apparatus includes: a first ejection unit configured to eject droplets on a recording medium conveyed in a conveyance direction to form an image for detection; a first detection unit disposed downstream of the first ejection unit and configured to detect the image for detection; a second ejection unit disposed downstream of the detection unit and configured to eject droplets on the recording medium; and a control unit configured to: predict a first elongation amount of the recording medium based on a first difference between a first set time period and a first detection time period from a reference time point to a first detection time point when the image for detection is detected by the first detection unit; and perform delay control on the second ejection unit for delaying an ejection timing of the second ejection unit based on the predicted elongation amount.Type: ApplicationFiled: March 20, 2020Publication date: May 27, 2021Inventors: Masato Matsuzuki, Yoshiyuki Taguchi, Chikara Manabe, Kunio Miyakoshi, Maki Hasegawa
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Publication number: 20210075916Abstract: An image forming apparatus includes an image forming unit, first and second detectors, and a corrector. The image forming unit includes first and second image forming units disposed downstream of the first unit in a transport direction of a recording medium and causes the first and second units to form predetermined correction images onto the recording medium. The first detector is disposed downstream of the first unit and upstream of the second unit in the transport direction, and detects the correction image formed by the first unit. The second detector is disposed downstream of the second unit in the transport direction and detects the correction image formed by the second unit. The corrector corrects an image position of the second unit in a width direction of the recording medium by using the correction images formed by the first and second units and detected by the first and second detectors.Type: ApplicationFiled: March 2, 2020Publication date: March 11, 2021Applicant: FUJI XEROX CO., LTD.Inventors: Kunio MIYAKOSHI, Masato MATSUZUKI, Yoshiyuki TAGUCHI, Maki HASEGAWA, Chikara MANABE
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Publication number: 20210070070Abstract: An image processing apparatus includes a processor. The processor is configured to set an image position of a reference image in a transport direction of a recording medium to an arbitrary position on a specific page of the recording medium. The reference image is formed using a first color and serves as a reference for an image position of an image of a second color to be formed after the image of the first color is formed. The processor is also configured to adjust the image position for the second color on an adjacent page, located adjacently upstream of the specific page in the transport direction, by using image information of the reference image formed on the specific page.Type: ApplicationFiled: March 26, 2020Publication date: March 11, 2021Applicant: FUJI XEROX CO., LTD.Inventors: Maki HASEGAWA, Kunio MIYAKOSHI, Masato MATSUZUKI, Yoshiyuki TAGUCHI, Chikara MANABE
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Patent number: 10919292Abstract: An ejection apparatus includes: a feeding unit that feeds a recording medium; a first ejection unit that ejects droplets onto the recording medium to form plural detection images along a feeding direction of the recording medium, a detection unit that detects a distance from a predetermined origin of the recording medium to each of the detection images along the feeding direction; and a second ejection unit that is disposed on a downstream side relative to the first ejection unit in the feeding direction of the recording medium, and ejects droplets onto the recording medium at a timing based on a value obtained by adding an average value of differences between detection values of the detection unit and setting values to a setting value of the detection image on most downstream side in the feeding direction.Type: GrantFiled: November 12, 2019Date of Patent: February 16, 2021Assignee: Fuji Xerox Co., Ltd.Inventor: Yoshiyuki Taguchi
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Publication number: 20200316934Abstract: An ejection apparatus includes: a feeding unit that feeds a recording medium; a first ejection unit that ejects droplets onto the recording medium to form plural detection images along a feeding direction of the recording medium, a detection unit that detects a distance from a predetermined origin of the recording medium to each of the detection images along the feeding direction; and a second ejection unit that is disposed on a downstream side relative to the first ejection unit in the feeding direction of the recording medium, and ejects droplets onto the recording medium at a timing based on a value obtained by adding an average value of differences between detection values of the detection unit and setting values to a setting value of the detection image on most downstream side in the feeding direction.Type: ApplicationFiled: November 12, 2019Publication date: October 8, 2020Inventor: Yoshiyuki Taguchi
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Patent number: 9336466Abstract: A printing apparatus includes: a first driving portion transporting a paper sheet; a printing portion being disposed on an upstream side of the first driving portion in a transporting direction of the transported paper sheet, including a plurality of aligned ejection ports ejecting liquid onto the transporting paper sheet to print an image on the paper sheet by the liquid; a drawing portion being disposed on an upstream side of the printing portion in the transporting direction, drawing the paper sheet of which a tip end is placed at a preset position, and feeding the paper sheet to a transporting path via the printing portion and the first driving portion; and a guiding portion being interposed between the printing portion and the first driving portion in the transporting direction, and when feeding the paper sheet, freely reciprocating between a first position and a second position.Type: GrantFiled: February 5, 2015Date of Patent: May 10, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Teruki Kishimoto, Yoshiyuki Taguchi, Shun Ikegami, Masafumi Kudo
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Patent number: 9291975Abstract: A sheet-edge detecting device includes first and second detecting units and a determining unit. The detecting units are disposed at an edge of a sheet having feed holes in a direction crossing a transporting direction of the sheet, and are separated from each other in the transporting direction so as not to be positioned in one or more feed holes simultaneously. In the direction crossing the transporting direction, the detecting units are separated from each so as not to be positioned in a feed hole and outside the edge simultaneously, one of the detecting units is at a position corresponding to an allowable displacement of the edge, and the other detecting unit is at the same position as the one of the detecting units or closer to the edge than the one of the detecting units is. The determining unit determines the position of the edge of the sheet.Type: GrantFiled: February 6, 2015Date of Patent: March 22, 2016Assignee: FUJI XEROX CO., LTD.Inventor: Yoshiyuki Taguchi
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Publication number: 20160070996Abstract: A printing apparatus includes: a first driving portion transporting a paper sheet; a printing portion being disposed on an upstream side of the first driving portion in a transporting direction of the transported paper sheet, including a plurality of aligned ejection ports ejecting liquid onto the transporting paper sheet to print an image on the paper sheet by the liquid; a drawing portion being disposed on an upstream side of the printing portion in the transporting direction, drawing the paper sheet of which a tip end is placed at a preset position, and feeding the paper sheet to a transporting path via the printing, portion and the first driving portion; and a guiding portion being interposed between the printing portion and the first driving portion in the transporting direction, and when feeding the paper sheet, freely reciprocating between a first position and a second position.Type: ApplicationFiled: February 5, 2015Publication date: March 10, 2016Inventors: Teruki KISHIMOTO, Yoshiyuki TAGUCHI, Shun IKEGAMI, Masafumi KUDO
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Patent number: 9136788Abstract: Disclosed is a motor control apparatus for controlling a synchronous motor, which includes a receiver section for receiving the value detected by a temperature sensor installed inside the synchronous motor. The synchronous motor is started up with the current fed into it, whose magnitude is changed in accordance with the temperature received by the receiver section at the time of starting up the synchronous motor. In this way, the stable startup of the synchronous motor can be guaranteed and the useful life of the semiconductor elements can also be prolonged.Type: GrantFiled: February 16, 2009Date of Patent: September 15, 2015Assignee: Hitachi, Ltd.Inventors: Tomofumi Okubo, Norinaga Suzuki, Hajime Uematsu, Hideharu Tanaka, Masakazu Hase, Yoshiyuki Taguchi
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Publication number: 20150234337Abstract: A sheet-edge detecting device includes first and second detecting units and a determining unit. The detecting units are disposed at an edge of a sheet having feed holes in a direction crossing a transporting direction of the sheet, and are separated from each other in the transporting direction so as not to be positioned in one or more feed holes simultaneously. In the direction crossing the transporting direction, the detecting units are separated from each so as not to be positioned in a feed hole and outside the edge simultaneously, one of the detecting units is at a position corresponding to an allowable displacement of the edge, and the other detecting unit is at the same position as the one of the detecting units or closer to the edge than the one of the detecting units is. The determining unit determines the position of the edge of the sheet.Type: ApplicationFiled: February 6, 2015Publication date: August 20, 2015Applicant: FUJI XEROX CO., LTD.Inventor: Yoshiyuki TAGUCHI