Patents by Inventor Yuichiro Baba
Yuichiro Baba 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: 10547223Abstract: A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.Type: GrantFiled: April 30, 2015Date of Patent: January 28, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takashi Ishigami, Yuichiro Baba, Manabu Oshida, Ryoji Kobayashi
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Publication number: 20190252936Abstract: An electric machine capable of easily and efficiently assembling a rotor core to a rotating shaft is provided. A rotor core is formed by laminating a first steel plate consisting of one or more electromagnetic steel plates having a first protrusion portion to be accommodated in a groove portion of a rotating shaft and a second steel plate consisting of one or more electromagnetic steel plates having a second protrusion portion to be accommodated in the groove portion of the rotating shaft. The first protrusion portion of the first steel plate has a first engaging portion deformed by a side surface of the groove portion of the rotating shaft. At least a part of the first engaging portion of the first steel plate is disposed in a space formed between a second protrusion portion of the second steel plate and the side surface of a groove portion of the rotating shaft.Type: ApplicationFiled: July 19, 2017Publication date: August 15, 2019Inventors: Hiromitsu OKAMOTO, Shinji YAMAZAKI, Yuichiro BABA, Ryoji KOBAYASHI, Motoo KITAHARA, Yuki ARAI
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Patent number: 10348149Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.Type: GrantFiled: August 19, 2015Date of Patent: July 9, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuichiro Baba, Takashi Ishigami, Ryoji Kobayashi, Manabu Oshida, Satoshi Yamamura
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Patent number: 10305338Abstract: A rotor for a rotating electric machine has interference and lightening holes. The rotor includes a shaft and a rotor iron core. The shaft is press fitted in the rotor iron core. The rotor iron core includes a shaft hole, an outer area, an inner area in which the shaft is press fitted, a plurality of ribs connecting the outer area and the inner area. Each of the ribs includes a plurality of outer rib joints adjacent to the outer area, a plurality of outer rib portions adjacent to the outer area, a plurality of inner rib joints adjacent to the inner area, and a plurality of inner rib portions adjacent to the inner area. The outer rib portions are connected to the inner rib portions and the total number of the inner rib joints is larger than that of the outer rib joints.Type: GrantFiled: August 17, 2015Date of Patent: May 28, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Manabu Oshida, Satoshi Yamamura, Ryoji Kobayashi, Yuichiro Baba, Yuji Saito
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Patent number: 10236754Abstract: Provided is a stator of a rotary electric machine in which a bonding portion of ends of coil segments is formed at a coil end of the stator without being inflated toward the opposite side to a stator core, and the coil end can be minimized in an axial direction. The stator of the rotary electric machine includes a stator core (10) having a plurality of slots and a coil segment (30) which is disposed in the stator core to form a stator winding (3). The ends of the coil segments are overlapped in the axial direction, and bonded through the bonding portion. The bonding portion is formed in a shape such that the bonding portion is melted and flows down from the end (6a) of the coil segment on the opposite side to the stator core toward the end (5a) of the coil segment on a side near the stator core.Type: GrantFiled: October 21, 2015Date of Patent: March 19, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yuichiro Baba, Kenichi Nakayama, Manabu Oshida, Shin Onose
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Publication number: 20180337580Abstract: Provided is a stator for a rotary electric machine which can suppress the mechanical effects of thermal expansion and contraction of a fixing member for fixing a temperature detector, on a temperature detection element. The stator for a rotary electric machine includes a stator coil, a temperature detection unit including a temperature detection element, a protection member extending in a longitudinal direction to cover the temperature detection unit, and a fixing member serving as a positioning mechanism for the temperature detection unit with respect to a stator coil. The fixing member includes a clamp portion for fixing the protection member, and the clamp portion clamps the protection member at a position where the clamp portion does not overlap the temperature detection element in a longitudinal direction of the protection member.Type: ApplicationFiled: October 26, 2016Publication date: November 22, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuichiro BABA, Taku ITO
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Publication number: 20170302116Abstract: A rotor for a rotating electric machine has interference and lightening holes. The rotor includes a shaft and a rotor iron core. The shaft is press fitted in the rotor iron core. The rotor iron core includes a shaft hole, an outer area, an inner area in which the shaft is press fitted, a plurality of ribs connecting the outer area and the inner area. Each of the ribs includes a plurality of outer rib joints adjacent to the outer area, a plurality of outer rib portions adjacent to the outer area, a plurality of inner rib joints adjacent to the inner area, and a plurality of inner rib portions adjacent to the inner area. The outer rib portions are connected to the inner rib portions and the total number of the inner rib joints is larger than that of the outer rib joints.Type: ApplicationFiled: August 17, 2015Publication date: October 19, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Manabu OSHIDA, Satoshi YAMAMURA, Ryoji KOBAYASHI, Yuichiro BABA, Yuji SAITO
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Publication number: 20170237321Abstract: Provided is a stator of a rotary electric machine in which a bonding portion of ends of coil segments is formed at a coil end of the stator without being inflated toward the opposite side to a stator core, and the coil end can be minimized in an axial direction. The stator of the rotary electric machine includes a stator core (10) having a plurality of slots and a coil segment (30) which is disposed in the stator core to form a stator winding (3). The ends of the coil segments are overlapped in the axial direction, and bonded through the bonding portion. The bonding portion is formed in a shape such that the bonding portion is melted and flows down from the end (6a) of the coil segment on the opposite side to the stator core toward the end (5a) of the coil segment on a side near the stator core.Type: ApplicationFiled: October 21, 2015Publication date: August 17, 2017Inventors: Yuichiro BABA, Kenichi NAKAYAMA, Manabu OSHIDA, Shin ONOSE
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Publication number: 20170214287Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.Type: ApplicationFiled: August 19, 2015Publication date: July 27, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuichiro BABA, Takashi ISHIGAMI, Ryoji KOBAYASHI, Manabu OSHIDA, Satoshi YAMAMURA
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Publication number: 20170117767Abstract: A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.Type: ApplicationFiled: April 30, 2015Publication date: April 27, 2017Inventors: Takashi ISHIGAMI, Yuichiro BABA, Manabu OSHIDA, Ryoji KOBAYASHI
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Patent number: 8672385Abstract: A seat locking device includes a striker and a catching section. The catching section includes a base plate including a first entrance concave portion, a cover member including a second entrance concave portion, a latch, a lock plate, and a bumper rubber including a substantially isosceles-triangle portion. A lateral surface of a holding concave portion of the latch is inclined such that an opening side of the lateral surface is located closer to a bottom surface of the first entrance concave portion than its counter-opening side. A bottom surface of the holding concave portion is closer to an imaginary center line of the first entrance concave portion than one lateral surface of the first entrance concave portion so that a catching-capable dimension for the striker is set between the bottom surface of the holding concave portion and another lateral surface of the first entrance concave portion.Type: GrantFiled: February 8, 2012Date of Patent: March 18, 2014Assignee: Fuji Kiko Co., Ltd.Inventors: Tadashi Matsumoto, Yuichiro Baba
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Publication number: 20120251231Abstract: A seat locking device includes a striker and a catching section. The catching section includes a base plate including a first entrance concave portion, a cover member including a second entrance concave portion, a latch, a lock plate, and a bumper rubber including a substantially isosceles-triangle portion. A lateral surface of a holding concave portion of the latch is inclined such that an opening side of the lateral surface is located closer to a bottom surface of the first entrance concave portion than its counter-opening side. A bottom surface of the holding concave portion is closer to an imaginary center line of the first entrance concave portion than one lateral surface of the first entrance concave portion so that a catching-capable dimension for the striker is set between the bottom surface of the holding concave portion and another lateral surface of the first entrance concave portion.Type: ApplicationFiled: February 8, 2012Publication date: October 4, 2012Inventors: Tadashi MATSUMOTO, Yuichiro BABA
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Publication number: 20100001605Abstract: A rotational machine which improves the reliability of the permanent magnets provided between claw poles by preventing shift in an axial direction during operation of the rotational machine. A stator and a rotor supported rotatably on an inner periphery of the stator are provided. The rotor has a pair of claw poles disposed in an alternately opposed orientation and having cylindrical field exciting coils on a central section. A permanent magnet is disposed between the claw poles. A holder retains the permanent magnets to a fixed position. The holder retains the permanent magnets between the claw poles by pressing on a side face of the claw poles as a result of an elastic force acting with respect to the rotational direction of the rotational machine.Type: ApplicationFiled: May 26, 2009Publication date: January 7, 2010Applicant: Hitachi, Ltd.Inventors: Susumu TAJIMA, Masami TAKANO, Yuichiro BABA
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Patent number: 7023113Abstract: An alternator for a vehicle includes a stator having a stator winding, a rotor opposing to the stator through a gap, a rectifier for converting AC power generated by the stator winding into DC power, a frame which holds the stator and has a cooling medium path at least one end thereof being opened, and an end plate for hermetically closing the opened end of the cooling medium path, wherein a cathode side rectifying element constituting the rectifier is fixed to a portion of the end plate not opposing to the cooling medium path, and a cooling member, at which an anode side rectifying element constituting the rectifier is fixed, is fixed to the end plate in an insulated state so that the anode side rectifying element is disposed at a position lower in temperature than a fixed position where the cathode side rectifying element is disposed.Type: GrantFiled: April 25, 2003Date of Patent: April 4, 2006Assignee: Hitachi, Ltd.Inventors: Susumu Tajima, Yuichiro Baba, Shinji Yamazaki
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Publication number: 20040135443Abstract: An alternator for a vehicle includes a stator having a stator winding, a rotor opposing to the stator through a gap, a rectifier for converting AC power generated by the stator winding into DC power, a frame which holds the stator and has a cooling medium path at least one end thereof being opened, and an end plate for hermetically closing the opened end of the cooling medium path, whereinType: ApplicationFiled: April 25, 2003Publication date: July 15, 2004Applicant: Hitachi, Ltd.Inventors: Susumu Tajima, Yuichiro Baba, Shinji Yamazaki