Patents by Inventor TATEMATSU
TATEMATSU 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: 7768170Abstract: A rotary electric machine having a stator and capable of effectively utilizing both end faces of a rotor in the rotating axis direction. The stator comprises a radial part disposed in the rotating axis direction and axial parts disposed in the radial direction. The radial part and the axial parts comprise teeth and coils. The rotor comprises a rotor shaft, a rotor core, and a magnet. The rotor core comprises a radial part and axial parts. The magnet comprises a radial part and axial parts. The radial part and the axial parts of the magnet are formed to face the radial part and the axial parts and of the stator.Type: GrantFiled: June 10, 2005Date of Patent: August 3, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazutaka Tatematsu, Yasuhide Yagyu
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Patent number: 7758706Abstract: A method for producing a dust core compact includes the steps of forming a compact component by pressure-forming a soft magnetic powder having an average particle diameter Da under a pressure Pa, and forming a compact by pressure-forming a soft magnetic powder having an average particle diameter Db and the compact component under a pressure Pb. Average particle diameters Da and Db of the soft magnetic powders satisfy relationship Da/Db?2, and pressures Pa and Pb applied during the pressure-forming satisfy relationship Pa/Pb?½. With this structure, a method for producing a dust core compact exhibiting a high strength and capable of being fabricated even when it has a complex shape, and the dust core compact can be provided.Type: GrantFiled: September 16, 2005Date of Patent: July 20, 2010Assignees: Sumitomo Electric Industries, Ltd., Toyota Jidosha Kabushiki KaishaInventors: Kazuhiro Hirose, Haruhisa Toyoda, Atsushi Sato, Takao Nishioka, Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu, Kenji Harada
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Patent number: 7755243Abstract: A rotating electric motor includes a rotary shaft capable of rotation, a stator core formed in a cylindrical configuration, a rotor core fixed to the rotary shaft, a magnet set at the rotor core such that a pair of magnetic poles of different magnetism are aligned in the radial direction of the rotor core, a field yoke provided at the perimeter of the stator core, and a winding that can control the magnetic flux density across the rotor core and the stator core by forming a magnetic circuit across the field yoke and the rotor core.Type: GrantFiled: February 16, 2007Date of Patent: July 13, 2010Assignees: Toyota Jidosha Kabushiki Kaisha, Nagoya Institute of TechnologyInventors: Ryoji Mizutani, Kazutaka Tatematsu, Eiji Yamada, Nobuyuki Matsui, Takashi Kosaka
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Publication number: 20100156204Abstract: A stator core includes a pressurized powder core section which is produced by compression-molding a magnetic powder covered by an insulation coating. At least a portion of the pressurized powder core section forms at least a part of a winding slot section around which a winding is wrapped. The pressurized powder core section comprises a winding guide groove which prevents the winding from deviating along the extending direction of the winding slot section. As a result, a space factor of the winding can be increased, to thereby further improve motor output.Type: ApplicationFiled: September 8, 2006Publication date: June 24, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu
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Patent number: 7737600Abstract: In a stator core composed of a powder compacted magnetic body, a yoke part comprises a protrusion protruding from an axial end face of a tooth. The tooth has an axial length gradually decreases towards an outside along the radial direction of the stator core, and a circumferential length which gradually increases towards an outside along the radial direction of the stator core. In one of the cross sections of stator core perpendicular to a radial direction, the height difference between axial end faces of the yoke part and the tooth is substantially equal to an axial length of a coil end part. Further, a cross-sectional area of the tooth perpendicular to the radial direction is substantially maintained constant along the radial direction, and the cross-sectional area is secured at a junction between the tooth and the yoke part, while half of the cross-sectional area is secured in a circumferential cross section of the yoke part.Type: GrantFiled: October 28, 2005Date of Patent: June 15, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu, Kenji Harada, Toshiya Yamaguchi, Eisuke Hoshina
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Patent number: 7714476Abstract: A core comprises a plurality of core split members having yoke portions and tooth portions and arranged in such a circumferential shape that the yoke portions contact with each other while the tooth portions being directed inward. The core further comprises a ring contacting with the yoke portions, and stoppers mounted on the outer face sides of the yoke portions for fixing the ring on the yoke portions. The yoke portions and the ring are formed in corrugated shape to mesh with each other, and the stoppers are formed with projections that engage with the inner side of the ring. This structure provides both the rotating electrical machine core having the core split members arranged in the circumferential shape and fastened to each other while preventing occurrence of a stress and a positional displacement between the core split members, and a rotating electrical machine.Type: GrantFiled: January 15, 2007Date of Patent: May 11, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Eisuke Hoshina, Toshiya Yamaguchi, Yasuhiro Endo, Kazutaka Tatematsu, Yutaka Komatsu
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Publication number: 20100075218Abstract: A battery unit includes a casing, bipolar batteries as a plurality of stacked type batteries housed in the casing, and a plug. The bipolar battery is formed by stacking a plurality of battery elements each having sheet electrodes on opposite sides of an electrolyte, and has collectors. The plug is detachably inserted between the bipolar batteries, and electrically connects bipolar batteries.Type: ApplicationFiled: March 7, 2008Publication date: March 25, 2010Inventors: Kazutaka Tatematsu, Ryoji Mizutani, Eiji Yamada, Yasuhiro Endo
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Publication number: 20100071971Abstract: An electric motor (10) has a field pole formed by a field current passing through a field winding (50). A voltage booting converter (120) converts output voltage of a battery (B) and outputs the voltage between a power source line (107) and a grounding line (105). Field winding (50) is electrically connected onto an electric current channel between battery (B) and power source line (107) and formed so that voltage switched by a switching element (Q1) is applied to both ends. A controller (100) controls the field current so as to adjust density of magnetic flux between a rotor and a stator by performing switching control on switching element (Q1) and a switching element (Q3) connected in parallel to field winding (50) and converts the output voltage of battery (B) into voltage in accordance with a voltage command value.Type: ApplicationFiled: March 14, 2008Publication date: March 25, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, National University Corporation Nagoya Institute of TechnologyInventors: Kazutaka Tatematsu, Ryoji Mizutani, Eiji Yamada, Nobuyuki Matsui, Takashi Kosaka
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Publication number: 20100072865Abstract: A vehicle drive device includes a motor generator (MG2), a power control unit controlling the motor generator (MG2), and a case housing the motor generator (MG2) and the power control unit. The power control unit includes a first inverter driving the motor generator (MG2) and a voltage converter boosting a power supply voltage to apply the voltage to the first inverter. A reactor L1 which is a component of the voltage converter is disposed such that at least a portion of a core comes into contact with the case for heat exchange. Consequently, the heat is dissipated to the case having a large heat capacity for integral housing, to thereby allow the heat dissipation performance of the reactor (L1) arranged in the limited space to be ensured.Type: ApplicationFiled: October 1, 2007Publication date: March 25, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Endo, Ryoji Mizutani, Kazutaka Tatematsu, Tadafumi Yoshida
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Patent number: 7679256Abstract: A rotary electric machine capable of effectively utilizing both end faces of a rotor in the rotating axis direction by suppressing magnetic saturation comprises a stator having axial parts (31) and (32) and a radial part. The axial part (31) comprises cores (311) to (314) and coils (321) to (324), and the axial part (32) comprises cores (312) to (315) and coils (322) to (325). The radial part comprises cores (332) to (337) and coils (352) to (357). The width of each of the cores (311) to (315) in the circumferential direction is twice the width of each of the cores (332) to (337) in the circumferential direction. The number of windings of each of the coils (321) to (325) is equal to the number of windings of each of the coils (352) to (357).Type: GrantFiled: June 10, 2005Date of Patent: March 16, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazutaka Tatematsu, Ryoji Mizutani, Yasuhiro Endo, Yasuhide Yagyu, Nobuyuki Matsui, Yoshiaki Kano
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Publication number: 20100060100Abstract: Provided is a crossover module, which can facilitate the process of manufacturing a stator. The crossover module (20) is a module having crossovers (23) for connecting such coils (13) electrically with each other as are mounted on a stator core (11) of a motor (100). The crossover module (20) is constituted such that its shape can be changed between a shape, in which it is mounted on the stator core (11), and a shape, in which it is opened to the outer sides from the former shape.Type: ApplicationFiled: June 18, 2008Publication date: March 11, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hiroaki Urano, Kazutaka Tatematsu
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Publication number: 20100038981Abstract: Heat discharging property of the stator coil end is improved effectively in a rotating electric machine. A motor as the rotating electric machine includes a stator and a rotor. The stator includes a stator core and resin mold coil ends provided on both axial ends thereof. Column-shaped projections projecting in the axial direction are provided on axial side surfaces of resin mold coil ends at a plurality of positions. Cooling oil supplied from above the resin mold coil ends effectively cools the resin mold coil ends.Type: ApplicationFiled: August 12, 2009Publication date: February 18, 2010Applicants: Toyota Jidosha Kabushiki Kaisha, Nippon Soken, Inc.Inventors: Hiroaki Urano, Eiji Yamada, Kazutaka Tatematsu, Yasuji Taketsuna, Atomi Arakawa, Akihiro Tanaka, Sadahisa Onimaru, Hirohito Matsui, Ryotaro Okamoto
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Publication number: 20100019606Abstract: A rotating electric motor includes a stator core, a rotational shaft capable of rotation, a field yoke allowing a flow of magnetic flux in an axial direction, first and second rotor cores fixedly installed on the rotational shaft, a first magnet fixedly installed between the first rotor core and the second rotor core, a first rotor teeth formed at the first rotor core, a second magnet provided alongside of the first rotor teeth in the circumferential direction of the first rotor core, a second rotor teeth formed at the outer surface of the second rotor core, protruding outwardly in the radial direction, a third magnet provided alongside of the second rotor core in the axial direction, and windings that can control the density of magnetic flux between at least one of the first rotor core and second rotor core and the stator core.Type: ApplicationFiled: January 29, 2008Publication date: January 28, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryoji Mizutani, Kazutaka Tatematsu, Eiji Yamada, Nobuyuki Matsui, Takashi Kosaka
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Publication number: 20100007236Abstract: A stator core includes: an assembled stator core formed of annularly arranged, divided stator cores; a fixing member disposed at an outer circumferential surface of the assembled stator core and capable of pressing the divided stator cores inward in a radial direction of the assembled stator core to annularly arrange and thus fix the divided stator cores; and a weak portion provided between the divided stator cores and the fixing member and deformable by a force exerted from the fixing member to press the divided stator cores.Type: ApplicationFiled: October 17, 2007Publication date: January 14, 2010Applicant: TOYOTA JIDOSHA BABUSHIKI KAISHAInventors: Shinya Sano, Eiji Yamaha, Kazutaka Tatematsu
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Publication number: 20090273245Abstract: A stator core is formed by arranging divided cores (20) in a circumference direction in cylindrical shape. On an upper end surface (60) of a core back (50) of the divided core, holes (62, 64) are made. Then, on the upper end surface, a reinforcing ring (40) having through holes (66, 68) is arranged, and is connected with rivets (70, 72). Thus, stress is transmitted not only through a side surface (58) but also through the reinforcing ring (40), between the adjacent divided cores. Thus, strength of the stator using a powder magnetic core is ensured and a space is saved.Type: ApplicationFiled: June 14, 2007Publication date: November 5, 2009Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yasuhiro Endo, Kazutaka Tatematsu, Yutaka Komatsu
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Publication number: 20090250271Abstract: A driving gear of a vehicle comprising a motor generator (MG2), a power control unit (21) for controlling the motor generator (MG2), and a case for containing the motor generator (MG2) and the power control unit (21). The power control unit (21) comprises a first inverter for driving the motor generator (MG2), and a voltage converter for applying power supply voltage to the first inverter after stepping it up. The voltage converter includes a reactor (L1). Heat of the reactor (L1) is dissipated using lubricant touching the reactor (L1) and the case as heat transfer agent. A circulation path of lubricant is formed in the case and the reactor is arranged on the circulation path.Type: ApplicationFiled: October 27, 2006Publication date: October 8, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yutaka Komatsu, Yasuhiro Endo, Kazutaka Tatematsu, Takeshi Yamazaki, Hiromichi Kuno, Tadafumi Yoshida
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Publication number: 20090242286Abstract: A trans axle includes motor generators with central rotation axes of respective rotors arranged coaxially, a power split device arranged coaxially with the central rotation axis of a crank shaft and between motor generators, and a power control unit controlling the motor generators. The power control unit is arranged such that a reactor is positioned at least on one side and a smoothing capacitor is positioned on the other side of the central rotation axis of motor generator. The motor generators, the power split device and the power control unit are housed and integrated in a metal case, and fixed on a body of a vehicle (1000) by means of an engine mount.Type: ApplicationFiled: October 12, 2006Publication date: October 1, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazutaka Tatematsu, Ryoji Mizutani, Yasuhiro Endo
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Publication number: 20090205897Abstract: A battery is arranged outside a compartment. A service plug is arranged in the compartment. The service plug is a shutoff device that can shut off an output path of the battery by a manual operation. When a vehicle is hard hit at the front and a circuit of PCU is damaged, an excessive current may flow to the PCU, possibly generating heat or smoke from the PCU. When the vehicle goes wrong, a person on board the vehicle may pull out the service plug, whereby the power supply path from battery to PCU can be shut off.Type: ApplicationFiled: May 15, 2007Publication date: August 20, 2009Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Yasuhiro Endo, Ryoji Mizutani, Eiji Yamada, Kazutaka Tatematsu, Yasuaki Tahara
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Publication number: 20090206688Abstract: A cooling structure for a stator includes: a stator core; a stator coil that is wound on the stator core and includes a coil end formed on an end surface of the stator core in an axial direction of the stator core; a ring member provided on an outer periphery of the stator core; a case that houses the ring member and the stator core on which the stator coil is wound. In the cooling structure, a cooling medium is supplied between an outer peripheral surface of the ring member and an inner peripheral surface of the case, and the ring member includes at least one opening through which the cooling medium is supplied to the coil end from radially outside of the coil end.Type: ApplicationFiled: February 2, 2009Publication date: August 20, 2009Inventors: Shinya Sano, Kazutaka Tatematsu, Tomoka Sonohara, Atomi Arakawa
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Publication number: 20090184592Abstract: A rotating electric machine is provided that includes a rotating portion including a rotating shaft, a housing enclosing at least a part of the rotating shaft, and a stator coil accommodated in the housing. A static coolant supply portion supplies coolant to the stator coil from the outside of the stator coil in a radial direction of the rotating shaft. A rotating coolant supply portion supplies coolant to the stator coil from the inside of the stator coil in the radial direction of the rotating shaft. A guide portion is provided in the housing and extends toward the inner surface of the stator coil in the radial direction of the rotating shaft. The guide portion has a through hole through which coolant flows.Type: ApplicationFiled: January 8, 2009Publication date: July 23, 2009Inventors: Shinya Sano, Kazutaka Tatematsu, Tomoka Sonohara, Atomi Arakawa