Patents by Inventor Nobukazu HOSHI
Nobukazu HOSHI 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: 10910980Abstract: In a control device for a switched reluctance motor, a voltage drop control is executed in which a voltage dropped to be lower than a voltage applied in a case where the switched reluctance motor is driven in a high-load region is applied to the switched reluctance motor, in a case where the switched reluctance motor is driven in a low-load region. The low-load region is a lower load region than the high-load region.Type: GrantFiled: October 2, 2017Date of Patent: February 2, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo University of Science FoundationInventors: Junichi Deguchi, Makoto Funahashi, Kensuke Yoshizue, Nobukazu Hoshi, Tomoya Abe, Yusuke Kobayashi, Yosuke Murakami
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Patent number: 10483897Abstract: A switched reluctance motor system includes a switched reluctance motor, a rotor including a plurality of salient poles, a stator including a plurality of salient poles, coils of three phases wound around the salient poles of the stator, and an electronic control unit. The electronic control unit is configured to drive the switched reluctance motor in a pole configuration pattern of NSNSNS in which the salient poles of the stator that have different polarities are alternately arranged. The electronic control unit is configured to perform current waveform control when an excitation sound frequency of a given order coincides with a resonance frequency of the switched reluctance motor.Type: GrantFiled: April 19, 2018Date of Patent: November 19, 2019Assignees: TOYOTA JIDOSHA KABUSHII KAISHA, Tokyo University of Science FoundationInventors: Junichi Deguchi, Takahiro Shiina, Kensuke Yoshizue, Nobukazu Hoshi, Yusuke Kobayashi, Yosuke Murakami, Tomoya Abe
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Publication number: 20180309401Abstract: A switched reluctance motor system includes a switched reluctance motor, a rotor including a plurality of salient poles, a stator including a plurality of salient poles, coils of three phases wound around the salient poles of the stator, and an electronic control unit. The electronic control unit is configured to drive the switched reluctance motor in a pole configuration pattern of NSNSNS in which the salient poles of the stator that have different polarities are alternately arranged. The electronic control unit is configured to perform current waveform control when an excitation sound frequency of a given order coincides with a resonance frequency of the switched reluctance motor.Type: ApplicationFiled: April 19, 2018Publication date: October 25, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo University of Science FoundationInventors: Junichi DEGUCHI, Takahiro SHIINA, Kensuke YOSHIZUE, Nobukazu HOSHI, Yusuke KOBAYASHI, Yosuke MURAKAMI, Tomoya ABE
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Publication number: 20180102722Abstract: In a control device for a switched reluctance motor, a voltage drop control is executed in which a voltage dropped to be lower than a voltage applied in a case where the switched reluctance motor is driven in a high-load region is applied to the switched reluctance motor, in a case where the switched reluctance motor is driven in a low-load region. The low-load region is a lower load region than the high-load region.Type: ApplicationFiled: October 2, 2017Publication date: April 12, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo University of Science FoundationInventors: Junichi DEGUCHI, Makoto FUNAHASHI, Kensuke YOSHIZUE, Nobukazu HOSHI, Tomoya ABE, Yusuke KOBAYASHI, Yosuke MURAKAMI
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Publication number: 20170187315Abstract: A control device for a switched reluctance motor includes: a switching controller configured to execute switching control to switch drive control of the switched reluctance motor between a first control mode for reducing torque fluctuations and a second control mode for reducing fluctuations of a radial force based on rotational speed and a torque of the switched reluctance motor; a first controller configured to execute first control to cause an excitation current with a current waveform for reducing the torque fluctuations to flow through the coils; and a second controller configured to execute second control to cause an excitation current with a current waveform for reducing the radial force fluctuations to flow through the coils.Type: ApplicationFiled: December 20, 2016Publication date: June 29, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun-ichi DEGUCHI, Kazuya ARAKAWA, Kensuke YOSHIZUE, Nobukazu HOSHI, Keiichi SHIBUYA, Yusuke KOBAYASHI
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Patent number: 9515596Abstract: A switched reluctance motor includes: a stator provided with a plurality of stator teeth as salient poles in a radial fashion with winding wire wound around each of the plurality of stator teeth; a rotor provided with a plurality of rotor teeth as salient poles in a radial fashion; a driving circuit configured to apply a current to the winding wire for each phase; and a control device configured to control the driving circuit, the control device being configured to perform: starting rising of a current to the winding wire of a stator tooth of a phase being a non-excitation target due to stop of energization to the winding wire; and allowing the current applied to the winding wire of the stator tooth of a phase being an excitation target to fall.Type: GrantFiled: July 17, 2015Date of Patent: December 6, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO UNIVERSITY OF SCIENCE FOUNDATIONInventors: Jun-ichi Deguchi, Kazuya Arakawa, Kensuke Yoshizue, Nobukazu Hoshi, Noboru Nakayama, Takuya Iguchi
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Patent number: 9473061Abstract: A switched reluctance motor includes: a stator provided with a plurality of stator teeth as salient poles in a radial fashion with winding wire wound around each of the plurality of stator teeth; a rotor provided with a plurality of rotor teeth as salient poles in a radial fashion; a driving circuit configured to apply a current to the winding wire for each phase; and a control device configured to control the driving circuit, the control device being configured to perform: starting rising of a current to the winding wire of a stator tooth of a phase being a non-excitation target due to stop of energization to the winding wire; and allowing the current applied to the winding wire of the stator tooth of a phase being an excitation target to fall.Type: GrantFiled: July 17, 2015Date of Patent: October 18, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO UNIVERSITY OF SCIENCE FOUNDATIONInventors: Jun-ichi Deguchi, Kazuya Arakawa, Kensuke Yoshizue, Nobukazu Hoshi, Noboru Nakayama, Takuya Iguchi
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Publication number: 20160043681Abstract: A switched reluctance motor includes: a stator provided with a plurality of stator teeth as salient poles in a radial fashion with winding wire wound around each of the plurality of stator teeth; a rotor provided with a plurality of rotor teeth as salient poles in a radial fashion; a driving circuit configured to apply a current to the winding wire for each phase; and a control device configured to control the driving circuit, the control device being configured to perform: starting rising of a current to the winding wire of a stator tooth of a phase being a non-excitation target due to stop of energization to the winding wire; and allowing the current applied to the winding wire of the stator tooth of a phase being an excitation target to fall.Type: ApplicationFiled: July 17, 2015Publication date: February 11, 2016Applicants: Toyota Jidosha Kabushiki Kaisha, Tokyo University of Science FoundationInventors: Jun-ichi DEGUCHI, Kazuya ARAKAWA, Kensuke YOSHIZUE, Nobukazu HOSHI, Noboru NAKAYAMA, Takuya IGUCHI