Patents by Inventor Kenta TABUCHI
Kenta TABUCHI 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: 20240133460Abstract: Since the oil pump and the oil cooler are provided in the rear cover and the cooling oil passages for guiding the oil to the respective electric motors MG are integrated in the rear cover, the cooling oil passages do not pass through other case members other than the rear cover. As a consequence, it is possible to shorten the cooling oil passage through which the oil is guided to the respective electric motors MG.Type: ApplicationFiled: August 7, 2023Publication date: April 25, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kotaro ARATA, Shinichiro SUENAGA, Iori MATSUDA, Kenta TABUCHI
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Publication number: 20230402955Abstract: A device for estimating an internal temperature of an electric motor. The electric motor has a stator core extending cylindrically in a direction of an axis and around which a coil is wound, a rotor arranged rotatably around the axis, and a case that houses the stator core and the rotor, the coil being cooled by a first cooling liquid in the case. The device estimates the internal temperature by using a thermal circuit that regards a temperature of the first cooling liquid after heat reception from the coil as a first temperature equal to a temperature of the case.Type: ApplicationFiled: June 8, 2023Publication date: December 14, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta TABUCHI, Sho Okazaki, Hiroki Kato
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Publication number: 20230291280Abstract: A cooling device for an electric motor that includes a stator, a rotor and a shaft fixed in an inner circumferential surface of the rotor. The stator includes a stator core and a stator coil wound on the stator core. The stator coil includes a protruding portion which protrudes from the stator core and which constitutes a coil end. The cooling device includes (a) a refrigerant supply mechanism for supplying a refrigerant from an upper side of the electric motor and (b) a refrigerant guide protruding from a motor casing toward an inner peripheral side of the coil end. The refrigerant supply mechanism is configured to supply the refrigerant to the refrigerant guide. The refrigerant guide extends in a direction of a rotation axis of the electric motor to a position that overlaps with the coil end as seen from a radial direction of the electric motor.Type: ApplicationFiled: March 8, 2023Publication date: September 14, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenta TABUCHI
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Publication number: 20230291270Abstract: A cooling device for an electric motor that includes (i) a stator including a stator core and a stator coil, and (ii) a rotor. The electric motor is located in a position adjacent to a resolver in a direction of the rotation axis. The resolver includes a resolver stator, a resolver rotor and a resolver coil. The cooling device includes (a) a refrigerant supply mechanism and (b) an oil guide which is provided in an annular-shaped cover covering the resolver coil, for supplying a refrigerant supplied from the refrigerant supply mechanism onto a lower portion of a coil end of the stator coil. The oil guide includes a guide wall which extends in the direction of the rotation axis and in a circumferential direction of the annular-shaped cover. At least a portion of the guide wall overlaps with the coil end as seen from a radial direction.Type: ApplicationFiled: March 8, 2023Publication date: September 14, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenta TABUCHI
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Publication number: 20230268808Abstract: A stator for an electric motor includes: (a) a tubular stator core having slots provided through the stator core in a direction of a rotation axis of the stator core; (b) coils inserted through the slots; (c) a conductive member electrically connected to the coils; (d) a temperature sensor attached to the conductive member; and (e) a resin portion provided to cover at least a part of the conductive member and at least a part of the temperature sensor. The conductive member is provided with a hole that extends in the direction of the rotation axis of the stator core. The temperature sensor is inserted, at least its portion, in the hole.Type: ApplicationFiled: February 21, 2023Publication date: August 24, 2023Inventors: Kenta TABUCHI, Hiroki KATO
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Patent number: 11601023Abstract: Provided is a rotary electric machine including a rotor and a stator. The rotor includes a refrigerant passage. An axial direction of the rotor is along the horizontal direction. The stator is placed around the rotor and includes a tubular stator core. The stator core includes: a communication passage via which an inner peripheral surface of the stator core communicates with an outer peripheral surface of the tubular stator core such that the communication passage guides the refrigerant from the inner peripheral surface of the stator core to the outer peripheral surface of the stator core; and a projection portion provided on the outer peripheral surface of the tubular stator core such that the projection portion extends in the axial direction of the tubular stator core. The projection portion is placed downward in the gravitational direction from an opening of the communication passage on the outer peripheral surface.Type: GrantFiled: September 16, 2020Date of Patent: March 7, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Matsumoto, Kenta Tabuchi, Masachika Kawa
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Patent number: 11418071Abstract: A rotating electrical machine includes a rotor, a stator core, coils, and insulating sheets. A discharge port that discharges coolant is provided on an outer circumferential face of the rotor. The stator core includes an annular or cylindrical yoke, and teeth disposed on an inner circumferential face of the yoke in a circumferential direction with spaces. The stator core is disposed encompassing an outer circumference of the rotor. A slot-wall-face channel is provided on a wall face of the stator core defining a slot, and configured to open as to the slot for the coolant to flow through. The coils are wound on the teeth. The insulating sheet is disposed in the slot and interposed between the stator core and the coil, and is configured with at least part of the slot-wall-face channel open as to the coil.Type: GrantFiled: October 8, 2020Date of Patent: August 16, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta Tabuchi, Takashi Matsumoto
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Publication number: 20210242729Abstract: A rotating electrical machine includes a rotor, a stator core, coils, and insulating sheets. A discharge port that discharges coolant is provided on an outer circumferential face of the rotor. The stator core includes an annular or cylindrical yoke, and teeth disposed on an inner circumferential face of the yoke in a circumferential direction with spaces. The stator core is disposed encompassing an outer circumference of the rotor. A slot-wall-face channel is provided on a wall face of the stator core defining a slot, and configured to open as to the slot for the coolant to flow through. The coils are wound on the teeth. The insulating sheet is disposed in the slot and interposed between the stator core and the coil, and is configured with at least part of the slot-wall-face channel open as to the coil.Type: ApplicationFiled: October 8, 2020Publication date: August 5, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta TABUCHI, Takashi MATSUMOTO
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Publication number: 20210194297Abstract: Provided is a rotary electric machine including a rotor and a stator. The rotor includes a refrigerant passage. An axial direction of the rotor is along the horizontal direction. The stator is placed around the rotor and includes a tubular stator core. The stator core includes: a communication passage via which an inner peripheral surface of the stator core communicates with an outer peripheral surface of the tubular stator core such that the communication passage guides the refrigerant from the inner peripheral surface of the stator core to the outer peripheral surface of the stator core; and a projection portion provided on the outer peripheral surface of the tubular stator core such that the projection portion extends in the axial direction of the tubular stator core. The projection portion is placed downward in the gravitational direction from an opening of the communication passage on the outer peripheral surface.Type: ApplicationFiled: September 16, 2020Publication date: June 24, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi MATSUMOTO, Kenta TABUCHI, Masachika KAWA