Patents by Inventor Masahiko Honma
Masahiko Honma 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: 10566873Abstract: Provided is a rotating electrical machine including a housing in which a flow passage of cooling liquid can be easily formed and airtightness and productivity are high. A rotating electrical machine is configured to include a housing which is provided with a part of a flow passage of cooling liquid, a stator which is disposed on an inner circumferential side of the housing and includes a stator winding, and a rotor which is rotatably supported to an inner circumferential side of the stator with a gap between the stator and the rotor and the flow passage of the cooling liquid includes an annular groove having an open surface on at least one side of an axial direction of the housing and a plate provided to cover the open surface. Preferably, the housing and the plate are configured to be joined by welding or an adhesive material.Type: GrantFiled: August 17, 2015Date of Patent: February 18, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Toshio Ishikawa, Masahiko Honma
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Patent number: 10320249Abstract: A permanent magnet rotating electric machine includes a stator and a rotor disposed with an air gap interposed between the stator and the rotor. The rotor is provided with a rotor core provided with a plurality of magnet insertion holes in a circumferential direction, and a press-fit body pressed into each of the magnet insertion holes. The press-fit body includes a permanent magnet and a magnet fixing member provided on the sides of the permanent magnet. The press-fit body is fixed within the magnet insertion hole in such a way that, in the circumferential direction, one end of the press-fit body makes a line contact with the inner wall of the magnet insertion hole through a line contact portion of the magnet fixing member and the other end thereof makes a surface contact with the inner wall of the magnet insertion holes through a surface contact portion of the magnet fixing member.Type: GrantFiled: January 7, 2015Date of Patent: June 11, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiromitsu Okamoto, Masahiko Honma, Toshio Ishikawa
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Patent number: 9957413Abstract: A resin composition (601) containing the following is prepared: a base unsaturated-polyester resin and/or a base vinyl-ester resin; a base radical-polymerizable monomer; a radical-polymerizable monomer having a thermally latent isocyanate group; a photo-radical polymerization initiator; and an alkylborane and/or an alkoxyamine derivative. A stator coil (60) in a stator (20) in a dynamo-electric machine (10) is coated using said resin composition (601) only, i.e. just the one resin composition. An insulated coated section (29A) and a conductor-exposing section (29B) of a join-side coil end (62) are also coated using said resin composition (601).Type: GrantFiled: May 16, 2014Date of Patent: May 1, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Takahito Muraki, Satoshi Yamamura, Masahiko Honma, Yutaka Matsunobu
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Publication number: 20170294820Abstract: Provided is a rotating electrical machine including a housing in which a flow passage of cooling liquid can be easily formed and airtightness and productivity are high. A rotating electrical machine is configured to include a housing which is provided with a part of a flow passage of cooling liquid, a stator which is disposed on an inner circumferential side of the housing and includes a stator winding, and a rotor which is rotatably supported to an inner circumferential side of the stator with a gap between the stator and the rotor and the flow passage of the cooling liquid includes an annular groove having an open surface on at least one side of an axial direction of the housing and a plate provided to cover the open surface. Preferably, the housing and the plate are configured to be joined by welding or an adhesive material.Type: ApplicationFiled: August 17, 2015Publication date: October 12, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: Toshio ISHIKAWA, Masahiko HONMA
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Publication number: 20160376466Abstract: A resin composition (601) containing the following is prepared: a base unsaturated-polyester resin and/or a base vinyl-ester resin; a base radical-polymerizable monomer; a radical-polymerizable monomer having a thermally latent isocyanate group; a photo-radical polymerization initiator; and an alkylborane and/or an alkoxyamine derivative. A stator coil (60) in a stator (20) in a dynamo-electric machine (10) is coated using said resin composition (601) only, i.e. just the one resin composition. An insulated coated section (29A) and a conductor-exposing section (29B) of a join-side coil end (62) are also coated using said resin composition (601).Type: ApplicationFiled: May 16, 2014Publication date: December 29, 2016Inventors: Takahito MURAKI, Satoshi YAMAMURA, Masahiko HONMA, Yutaka MATSUNOBU
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Publication number: 20160359384Abstract: A permanent magnet rotating electric machine includes a stator and a rotor disposed with an air gap interposed between the stator and the rotor. The rotor is provided with a rotor core provided with a plurality of magnet insertion holes in a circumferential direction, and a press-fit body pressed into each of the magnet insertion holes. The press-fit body includes a permanent magnet and a magnet fixing member provided on the sides of the permanent magnet. The press-fit body is fixed within the magnet insertion hole in such a way that, in the circumferential direction, one end of the press-fit body makes a line contact with the inner wall of the magnet insertion hole through a line contact portion of the magnet fixing member and the other end thereof makes a surface contact with the inner wall of the magnet insertion holes through a surface contact portion of the magnet fixing member.Type: ApplicationFiled: January 7, 2015Publication date: December 8, 2016Applicant: Hitachi Automotive Systems, Ltd.Inventors: Hiromitsu OKAMOTO, Masahiko HONMA, Toshio ISHIKAWA
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Publication number: 20150028704Abstract: A high-output, high-efficiency and high-quality rotating electrical machine is provided which has a stator shaped to avoid interference between coil end portions even in cases where the coil space factor of stator coils is raised and the stator coils are formed by winding continuous wires, each having a rectangular cross-section, for high productivity. The stator coils include coils of plural turns straddling plural slots with the coils thus wound interconnected, to be continuous, with connectors. The stator has a stator core mounted, around an entire periphery thereof, with plural stator coils. The coil-end apex portions, disposed on both axial end sides of the stator core, are each approximately Z-shaped without any twisted portion. Each coil-end apex portion is divided into levels of different heights from the stator core end face in the axial direction. In this way, the thickness of overlapping coil layers is reduced to avoid interference between coil end portions.Type: ApplicationFiled: January 23, 2013Publication date: January 29, 2015Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kunihiro Ohsawa, Yasuhiko Kimura, Toshio Ishikawa, Masahiko Honma
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Publication number: 20140354095Abstract: Provided is a high-output, high-efficiency, and high-quality rotating electrical machine that is excellent in productivity, can prevent interference in coil end portions of stator coils, and has a stator with improved coolability. A stator coil 7 includes coils 74, 75 each of which is wound by a plurality of times across a plurality of slots and a connector 73 which connects the wound coils to each other so as to be continuously formed. A plurality of sets of stator coils 7 are arranged over the entire circumference of a stator core 6. Coil turn portions 74ct which are folded on vertexes of coil ends arranged in the axial direction of the stator core are each formed in a U shape, and radially arranged so that side faces thereof face the center. A gap penetrating from an inner peripheral side to an outer peripheral side is provided between adjacent ones of the coil turn portions 74ct on the vertexes of the coil ends.Type: ApplicationFiled: October 31, 2012Publication date: December 4, 2014Inventors: Toshio Ishikawa, Masahiko Honma, Kunihiro Ohsawa, Yasuhiko Kimura
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Patent number: 8823236Abstract: An object is to provide a rotating electric machine offering a high output and high efficiency by balancing inductance of each phase even if a stator is used in which stator windings of different phases are disposed in a slot of a stator core in a three-phase winding. A stator 5 includes a stator core 6 having a plurality of slots arrayed circumferentially and opening to an inner peripheral surface and a stator winding 7 wound in each of the slots. The stator winding 7 is divided into at least two for each phase (7U-A, 7U-B, 7V-A, 7V-B, 7W-A, 7W-B). After insertion of the stator core 6, the stator winding of each phase is connected in parallel or in series. The stator winding of each phase is disposed in slots such that combined inductance of different phases is equalized.Type: GrantFiled: August 11, 2010Date of Patent: September 2, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Toshio Ishikawa, Yasuhiko Kimura, Yoshimi Mori, Masahiko Honma, Yosuke Umesaki
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Publication number: 20120274171Abstract: An object is to provide a rotating electric machine offering a high output and high efficiency by balancing inductance of each phase even if a stator is used in which stator windings of different phases are disposed in a slot of a stator core in a three-phase winding. A stator 5 includes a stator core 6 having a plurality of slots arrayed circumferentially and opening to an inner peripheral surface and a stator winding 7 wound in each of the slots. The stator winding 7 is divided into at least two for each phase (7U-A, 7U-B, 7V-A, 7V-B, 7W-A, 7W-B). After insertion of the stator core 6, the stator winding of each phase is connected in parallel or in series. The stator winding of each phase is disposed in slots such that combined inductance of different phases is equalized.Type: ApplicationFiled: August 11, 2010Publication date: November 1, 2012Applicant: Hitachi Automotive Systems, Ltd.Inventors: Toshio Ishikawa, Yasuhiko Kimura, Yoshimi Mori, Masahiko Honma, Yosuke Umesaki
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Publication number: 20120038238Abstract: A vehicular AC generator includes: a rotor (1) with a plurality of magnetic poles (113), assuming a shape for suppressing bias magnetism, and disposed along a circumferential direction, which includes a field winding (12); a stator (2) disposed so as to leave a gap between the rotor (1) and the stator (2); and a semiconductor element that rectifies an AC current induced at a stator coil (105) wound at the stator (2) as power is supplied to the field winding (112) at the rotor (1) so as to convert the AC current to a DC current, wherein: the stator (2) is formed by laminating electromagnetic steel plates; and a resistance value of the stator coil (105) wound at the stator (2) is set to a value equal to or less than a predetermined value.Type: ApplicationFiled: March 11, 2009Publication date: February 16, 2012Applicant: Hitachi, Ltd.Inventors: Yoshihisa Ishikawa, Kenji Miyata, Takayuki Koyama, Masahiko Honma
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Patent number: 7948140Abstract: When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The gap becomes larger because the conductors are tapered. Therefore, the adhesion between both conductors is impaired, with a consequent fear of occurrence of joining imperfection. In opposed joined face portions of electric wires (joint conductors), the conductors are deformed from the tips of their axes to the joined face side in such a manner that exposed portions at the tips of the conductors and insulating film faces located in the vicinity thereof are flush with each other or the exposed portions are projected.Type: GrantFiled: October 19, 2009Date of Patent: May 24, 2011Assignee: Hitachi, Ltd.Inventors: Takeshi Sakai, Yoshimi Mori, Yasuhiko Kimura, Masahiko Honma, Fuminori Ishikawa
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Publication number: 20110025165Abstract: A rotating electrical machine including a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein: coil groups are received in a slot between two teeth of the stator core; each of the teeth has a tooth main body and two tooth tip edge portions, and the tooth main body and the tooth tip edge portions are connected by connecting portions, with slits being formed in the coil sides of the connecting portions; and the slits extend from opening portions towards the centers of the tooth tip edge portions in circumferential direction, and are formed so that their tooth main body sides and their tip edge portion sides, that together define the opening portions of the slits, contact one another; with the gaps between adjacent ones of the tooth tip edge portions in circumferential direction being smaller than a width of the slot.Type: ApplicationFiled: July 28, 2010Publication date: February 3, 2011Applicant: Hitachi, Ltd.Inventors: Takashi NAGANAWA, Yoshihisa Ishikawa, Keii Ueno, Takahiro Makiyama, Masahiko Honma, Yosuke Umesaki
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Publication number: 20100038109Abstract: When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The gap becomes larger because the conductors are tapered. Therefore, the adhesion between both conductors is impaired, with a consequent fear of occurrence of joining imperfection. In opposed joined face portions of electric wires (joint conductors), the conductors are deformed from the tips of their axes to the joined face side in such a manner that exposed portions at the tips of the conductors and insulating film faces located in the vicinity thereof are flush with each other or the exposed portions are projected.Type: ApplicationFiled: October 19, 2009Publication date: February 18, 2010Applicant: Hitachi, Ltd.Inventors: Takeshi SAKAI, Yoshimi Mori, Yasuhiko Kimura, Masahiko Honma, Fuminori Ishikawa
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Patent number: 7615906Abstract: When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The gap becomes larger because the conductors are tapered. Therefore, the adhesion between both conductors is impaired, with a consequent fear of occurrence of joining imperfection. In opposed joined face portions of electric wires (joint conductors), the conductors are deformed from the tips of their axes to the joined face side in such a manner that exposed portions at the tips of the conductors and insulating film faces located in the vicinity thereof are flush with each other or the exposed portions are projected.Type: GrantFiled: May 23, 2006Date of Patent: November 10, 2009Assignee: Hitachi, Ltd.Inventors: Takeshi Sakai, Yoshimi Mori, Yasuhiko Kimura, Masahiko Honma, Fuminori Ishikawa
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Publication number: 20090184599Abstract: An alternator for a vehicle includes: a stator that is configured by a concentrated winding system in that a stator coil for a single phase is wound on a single pole; and a rotor with 16 or more poles, that is disposed to face the stator so as to be rotatable with a gap intervening therebetween, wherein a pole ratio of the rotor and the stator is 2:3.Type: ApplicationFiled: November 5, 2008Publication date: July 23, 2009Applicant: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Shinjiro Watari, Masahiko Honma
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Patent number: 7417351Abstract: A rotary machine having a stator composed of a stator iron core having a plurality of slots formed in the direction of the rotation axis and stator windings inserted into the plurality of slots, wherein the stator windings are composed of a plurality of conductors respectively inserted into the plurality of slots in the direction of the rotation axis and the stator has a connection ring having slots into which the plurality of conductors are inserted in the direction of the rotation axis.Type: GrantFiled: March 1, 2005Date of Patent: August 26, 2008Assignee: Hitachi, Ltd.Inventors: Yoshimi Mori, Toshiaki Ueda, Takeshi Sakai, Yasuhiko Kimura, Shin Onose, Hiroshi Kanazawa, Masahiko Honma
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Publication number: 20060267440Abstract: When electric wires (joint conductors) are disposed adjacent each other in a peeled state of coatings, a gap corresponding to the total thickness of both conductors' insulating films as skin layers is formed between end joined face portions of the conductors. The gap becomes larger because the conductors are tapered. Therefore, the adhesion between both conductors is impaired, with a consequent fear of occurrence of joining imperfection. In opposed joined face portions of electric wires (joint conductors), the conductors are deformed from the tips of their axes to the joined face side in such a manner that exposed portions at the tips of the conductors and insulating film faces located in the vicinity thereof are flush with each other or the exposed portions are projected.Type: ApplicationFiled: May 23, 2006Publication date: November 30, 2006Applicant: Hitachi, Ltd.Inventors: Takeshi Sakai, Yoshimi Mori, Yasuhiko Kimura, Masahiko Honma, Fuminori Ishikawa
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Publication number: 20050194857Abstract: A rotary machine comprising a stator 2 composed of a stator iron core 3 having a plurality of slots formed in the direction of the rotation axis and stator windings inserted into the plurality of slots, wherein the stator windings are composed of a plurality of conductors 4 respectively inserted into the plurality of slots in the direction of the rotation axis and the stator 2 has a connection ring 1 having slots 13 into which the plurality of conductors 4 are inserted in the direction of the rotation axis.Type: ApplicationFiled: March 1, 2005Publication date: September 8, 2005Applicant: Hitachi, Ltd.Inventors: Yoshimi Mori, Toshiaki Ueda, Takeshi Sakai, Yasuhiko Kimura, Shin Onose, Hiroshi Kanazawa, Masahiko Honma
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Patent number: 6924580Abstract: The rotor of a vehicle alternator can firmly fasten the permanent magnets between claw-shaped magnetic poles. The rotor includes a Lundell type iron core having claw-shaped magnetic poles which are alternately arranged and opposed each other and include a centered cylindrical field winding, and a permanent magnet disposed between the claw-shaped magnetic poles for increasing the magnetic field. The permanent magnet is held by radial elastic force.Type: GrantFiled: April 23, 2003Date of Patent: August 2, 2005Assignee: Hitachi, Ltd.Inventors: Susumu Tajima, Shinji Yamazaki, Wasei Horioka, Masahiko Honma