Patents by Inventor Jun-ichi Deguchi
Jun-ichi Deguchi 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: 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
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Patent number: 9112391Abstract: A motor cooling device having good cooling performance, which is adapted to promote heat transfer between a coil end and a coil end cover even if the flowing amount of oil is small. A heat of a stator is withdrawn by the oil flowing around the coil end. For this purpose, the motor cooling device comprises a flow path formed between an outer face of the coil end and an inner face of the coil end cover, and a flow rate adjusting unit for changing a cross-sectional area of the flow path by moving the coil end cover toward the coil end or away from the coil end. The flow rate adjusting unit widens the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively large, and narrows the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively small.Type: GrantFiled: April 23, 2010Date of Patent: August 18, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun-ichi Deguchi, Kazuya Arakawa, Kensuke Yoshizue
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Publication number: 20130026867Abstract: A motor cooling device having good cooling performance, which is adapted to promote heat transfer between a coil end and a coil end cover even if the flowing amount of oil is small. A heat of a stator is withdrawn by the oil flowing around the coil end. For this purpose, the motor cooling device comprises a flow path formed between an outer face of the coil end and an inner face of the coil end cover, and a flow rate adjusting unit for changing a cross-sectional area of the flow path by moving the coil end cover toward the coil end or away from the coil end. The flow rate adjusting unit widens the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively large, and narrows the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively small.Type: ApplicationFiled: April 23, 2010Publication date: January 31, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun-ichi Deguchi, Kazuya Arakawa, Kensuke Yoshizue