Patents by Inventor Shinkichi Sawa
Shinkichi Sawa 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: 10511202Abstract: Slot accommodation portions of single coils forming an armature coil are arranged so as to be stacked in the radial direction in a slot. On the anti-wire-connection side, a one-side extending portion which is a coil end extending from the slot accommodation portion in the first layer, and a one-side extending portion which is a coil end extending from the slot accommodation portion in the second layer, extend in the same direction. No insulation sheet is provided in intervals between coil ends extending in the same direction, such as the extending portions (23b) and (21b) and extending portions (21d) and (22d).Type: GrantFiled: February 23, 2016Date of Patent: December 17, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kohei Egashira, Atsushi Sakaue, Tatsuro Hino, Shinkichi Sawa, Masashi Nakamura
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Patent number: 10439455Abstract: A tooth groove is provided at a border portion between a tooth body portion and a protrusion. The angle between a tooth body portion lateral face which is a lateral face in the circumferential direction of the tooth body portion and a tooth body portion stop portion which is a face, of the tooth groove, continued from the tooth body portion lateral face is the right angle or an acute angle. The protrusion is rotated toward the outer side in the circumferential direction, to bring a protrusion stop portion into close contact with the tooth body portion stop portion, the protrusion stop portion being an outer-circumferential-side lateral face of the protrusion, thereby forming a shoe in a tooth.Type: GrantFiled: December 9, 2015Date of Patent: October 8, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Aiko Nakano, Atsushi Sakaue, Tatsuro Hino, Kazunori Muto, Yoshihiro Harada, Shinkichi Sawa, Masashi Nakamura
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Stator for rotary electric machine having respective terminal wires connected to a connecting member
Patent number: 10411539Abstract: Winding bodies include: a first terminal wire that extends outward at a first axial end of a stator core from a radially innermost position inside slots; and a second terminal wire that extends outward at the first axial end of the stator core from a radially outermost position inside the slots, the first terminal wires are each led radially outward over coil ends of the stator winding, the second terminal wires are each led radially outward at positions that are nearer to the stator core than end portions of the first terminal wires that are led radially outward over the coil ends of the stator winding, and end portions of intraphase connecting second terminal wires are stacked in an axial direction with, placed in contact with, and connected to end portions of intraphase connecting first terminal wires that are subject to connection therewith.Type: GrantFiled: April 7, 2016Date of Patent: September 10, 2019Assignee: Mitsubishi Electric CorporationInventors: Masashi Nakamura, Kohei Egashira, Tatsuro Hino, Tetsuya Yokogawa, Shinkichi Sawa -
Patent number: 10263486Abstract: A plurality of coil groups are each configured by connecting a tip portion of a first conductor terminal and a tip portion of a second conductor terminal that is subject to connection therewith using a connecting conductor, and the connecting conductors include: a pair of connecting portions that are respectively disposed so as to contact the tip portion of the first conductor terminal and the tip portion of the second conductor terminal that is subject to connection therewith in a circumferential direction of the tip portions so as to be parallel to the tip portions, and that are joined together with the tip portions; and a linking portion that links the pair of connecting portions.Type: GrantFiled: September 22, 2014Date of Patent: April 16, 2019Assignee: Mitsubishi Electric CorporationInventors: Masashi Nakamura, Akihiro Yamamura, Shinkichi Sawa, Masaya Inoue
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Patent number: 10243418Abstract: A three-phase alternating-current winding is configured by connecting first conductor terminals and second conductor terminals that are disposed in a circular arc-shaped region using connecting units, electric power supplying terminals of the three-phase alternating-current winding are constituted by the first conductor terminals and the second conductor terminals that are disposed in the circular arc-shaped region, a number of parallel phase windings in the three-phase alternating-current winding is n, where n is a natural number that is greater than or equal to one, an angular range of the circular arc-shaped region is less than or equal to (180×n) electrical degrees, and the second conductor terminals that constitute the electric power supplying terminals are positioned between adjacent first conductor terminals when viewed from a radially outer side.Type: GrantFiled: August 18, 2016Date of Patent: March 26, 2019Assignee: Mitsubishi Electric CorporationInventors: Masashi Nakamura, Kohei Egashira, Tatsuro Hino, Tetsuya Yokogawa, Shinkichi Sawa
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Patent number: 10164490Abstract: In a rotary electric machine according to the present invention, an armature winding includes a plurality of distributed winding bodies that are each produced by winding a single conductor wire that is insulated, that is jointless and continuous, and that has a constant cross-sectional area perpendicular to a longitudinal direction, the conductor wires include first through third coil end portions that link first through fourth rectilinear portions and first through fourth rectilinear portions, and are formed such that radial widths w? of the first through fourth rectilinear portions are wider than radial widths w of the first through third coil end portions.Type: GrantFiled: June 27, 2014Date of Patent: December 25, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hironori Tsuiki, Tatsuro Hino, Atsushi Sakaue, Akira Hashimoto, Kazunori Muto, Masashi Nakamura, Shinkichi Sawa, Hiroyuki Akita
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Patent number: 10110083Abstract: A side surface at the outside of a plurality of teeth portions of one separated core is faced to a side surface of teeth portions of an adjacent separated core, so as to form a second slot which is straddled between the adjacent separated cores, and a first slot is formed by a plurality of teeth portions of one separated core, and a width size of the first slot is identical to a width size of the second slot, and coil conductor storage space is formed in the first slot via a first insulating component, and coil conductor storage space is formed in the second slot via a second insulating component, and a thickness size of the first insulating component is different from a thickness size of the second insulating component.Type: GrantFiled: November 8, 2013Date of Patent: October 23, 2018Assignee: Mitsubishi Electric CorporationInventors: Manabu Yoshinori, Atsushi Sakaue, Tatsuro Hino, Hironori Tsuiki, Shinichi Okada, Hiroki Shiota, Masaya Inoue, Shogo Okamoto, Shinji Nishimura, Akira Hashimoto, Shinkichi Sawa, Yutaka Ikura, Ryuichi Kitora
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Publication number: 20180278111Abstract: Slot accommodation portions of single coils forming an armature coil are arranged so as to be stacked in the radial direction in a slot. On the anti-wire-connection side, a one-side extending portion which is a coil end extending from the slot accommodation portion in the first layer, and a one-side extending portion which is a coil end extending from the slot accommodation portion in the second layer, extend in the same direction. No insulation sheet is provided in intervals between coil ends extending in the same direction, such as the extending portions (23b) and (21b) and extending portions (21d) and (22d).Type: ApplicationFiled: February 23, 2016Publication date: September 27, 2018Applicant: Mitsubishi Electric CorporationInventors: Kohei EGASHIRA, Atsushi SAKAUE, Tatsuro HINO, Shinkichi SAWA, Masashi NAKAMURA
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Publication number: 20180145549Abstract: A rotary electric machine according to the present invention includes: a stator including an outer core, a plurality of inner cores, and a coil accommodated in slots, each slot being surrounded by opposing circumferential side surfaces of tooth portions of adjacent inner cores and by inner circumferential surfaces of projections of the adjacent inner cores; and a rotor. A gap is provided between the circumferential side surfaces of the adjacent inner cores. The coil has a first slot-accommodated portion and a second slot-accommodated portion accommodated in different slots, and a turn portion connecting the two slot-accommodated portions on one end surface, in an axial direction, of a stator core. The turn portion is elastically urged in a direction in which the first slot-accommodated portion and the second slot-accommodated portion move away from each other in the circumferential direction.Type: ApplicationFiled: September 12, 2016Publication date: May 24, 2018Applicant: Mitsubishi Electric CorporationInventors: Tatsuro HINO, Kohei EGASHIRA, Tetsuya YOKOGAWA, Shinkichi SAWA, Akihiro YAMAMURA, Masaya INOUE, Akira HASHIMOTO, Masashi NAKAMURA
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Patent number: 9819238Abstract: Obtain a rotary electric machine by which a share of coil slots for a stator winding in slots, which are formed in a stator core, can be increased, and heat generation at a central portion of a stator can be decreased. The stator winding is composed of coil slots, which are inserted to the slots, and coil ends extended toward the outside in the axis direction of the stator core; and the coil conductors of the coil slots are configured in such a way that cross-sectional areas at central portions in the axis direction are wider cross-sectional areas at both end portions, and the cross-sectional areas of the coil conductors are reduced along the coil slots from the central portions to the both end portions.Type: GrantFiled: March 4, 2014Date of Patent: November 14, 2017Assignee: Mitsubishi Electric CorporationInventors: Yutaka Ikura, Shinkichi Sawa, Tatsuro Hino, Tetsuya Yokogawa, Atsushi Sakaue
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Publication number: 20170294812Abstract: A tooth groove is provided at a border portion between a tooth body portion and a protrusion. The angle between a tooth body portion lateral face which is a lateral face in the circumferential direction of the tooth body portion and a tooth body portion stop portion which is a face, of the tooth groove, continued from the tooth body portion lateral face is the right angle or an acute angle. The protrusion is rotated toward the outer side in the circumferential direction, to bring a protrusion stop portion into close contact with the tooth body portion stop portion, the protrusion stop portion being an outer-circumferential-side lateral face of the protrusion, thereby forming a shoe in a tooth.Type: ApplicationFiled: December 9, 2015Publication date: October 12, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Aiko NAKANO, Atsushi SAKAUE, Tatsuro HINO, Kazunori MUTO, Yoshihiro HARADA, Shinkichi SAWA, Masashi NAKAMURA
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Publication number: 20170256996Abstract: A three-phase alternating-current winding is configured by connecting first conductor terminals and second conductor terminals that are disposed in a circular arc-shaped region using connecting units, electric power supplying terminals of the three-phase alternating-current winding are constituted by the first conductor terminals and the second conductor terminals that are disposed in the circular arc-shaped region, a number of parallel phase windings in the three-phase alternating-current winding is n, where n is a natural number that is greater than or equal to one, an angular range of the circular arc-shaped region is less than or equal to (180×n) electrical degrees, and the second conductor terminals that constitute the electric power supplying terminals are positioned between adjacent first conductor terminals when viewed from a radially outer side.Type: ApplicationFiled: August 18, 2016Publication date: September 7, 2017Applicant: Mitsubishi Electric CorporationInventors: Masashi NAKAMURA, Kohei EGASHIRA, Tatsuro HINO, Tetsuya YOKOGAWA, Shinkichi SAWA
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Publication number: 20170237310Abstract: A plurality of coil groups are each configured by connecting a tip portion of a first conductor terminal and a tip portion of a second conductor terminal that is subject to connection therewith using a connecting conductor, and the connecting conductors include: a pair of connecting portions that are respectively disposed so as to contact the tip portion of the first conductor terminal and the tip portion of the second conductor terminal that is subject to connection therewith in a circumferential direction of the tip portions so as to be parallel to the tip portions, and that are joined together with the tip portions; and a linking portion that links the pair of connecting portions.Type: ApplicationFiled: September 22, 2014Publication date: August 17, 2017Applicant: Mitsubishi Electric CorporationInventors: Masashi NAKAMURA, Akihiro YAMAMURA, Shinkichi SAWA, Masaya INOUE
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Patent number: 9735641Abstract: Four layers of first coil rows formed by arranging first coil ends at a pitch of one slot in a circumferential direction are arranged in a radial direction to configure a first coil end group, three layers of second coil rows formed by arranging second coil ends at a pitch of one slot in a circumferential direction are arranged in a radial direction to configure a first coil end group, a cylindrical first insulating paper is housed inside the first coil end rows and inside the second coil end rows, and a cylindrical second insulating paper is housed between the first coil end rows and between the second coil end rows.Type: GrantFiled: August 28, 2013Date of Patent: August 15, 2017Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Atsushi Sakaue, Hiroyuki Akita, Hironori Tsuiki, Masaya Inoue, Shinkichi Sawa, Masashi Nakamura
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Patent number: 9712012Abstract: An armature winding includes a plurality of distributed winding bodies that are each produced by winding a single conductor wire that is insulated, jointless, and continuous, and that has a constant cross-sectional area perpendicular to a longitudinal direction, the conductor wires include first through third coil end portions that link first through fourth rectilinear portions and first through fourth rectilinear portions, and are formed such that radial widths w? of the first through fourth rectilinear portions are wider than radial widths w of the first through third coil end portions, and first gaps are formed between radially adjacent coil end portions to allow a cooling medium to pass through the first gaps.Type: GrantFiled: April 14, 2014Date of Patent: July 18, 2017Assignee: Mitsubishi Electric CorporationInventors: Hirohisa Yokota, Atsushi Sakaue, Hironori Tsuiki, Tatsuro Hino, Shinkichi Sawa, Masashi Nakamura, Shogo Okamoto
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Publication number: 20170117768Abstract: Winding bodies include: a first terminal wire that extends outward at a first axial end of a stator core from a radially innermost position inside slots; and a second terminal wire that extends outward at the first axial end of the stator core from a radially outermost position inside the slots, the first terminal wires are each led radially outward over coil ends of the stator winding, the second terminal wires are each led radially outward at positions that are nearer to the stator core than end portions of the first terminal wires that are led radially outward over the coil ends of the stator winding, and end portions of intraphase connecting second terminal wires are stacked in an axial direction with, placed in contact with, and connected to end portions of intraphase connecting first terminal wires that are subject to connection therewith.Type: ApplicationFiled: April 7, 2016Publication date: April 27, 2017Applicant: Mitsubishi Electric CorporationInventors: Masashi NAKAMURA, Kohei EGASHIRA, Tatsuro HINO, Tetsuya YOKOGAWA, Shinkichi SAWA
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Publication number: 20160261159Abstract: In a rotary electric machine according to the present invention, an armature winding includes a plurality of distributed winding bodies that are each produced by winding a single conductor wire that is insulated, that is jointless and continuous, and that has a constant cross-sectional area perpendicular to a longitudinal direction, the conductor wires include first through third coil end portions that link first through fourth rectilinear portions and first through fourth rectilinear portions, and are formed such that radial widths w? of the first through fourth rectilinear portions are wider than radial widths w of the first through third coil end portions.Type: ApplicationFiled: June 27, 2014Publication date: September 8, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hironori TSUIKI, Tatsuro HINO, Atsushi SAKAUE, Akira HASHIMOTO, Kazunori MUTO, Masashi NAKAMURA, Shinkichi SAWA, Hiroyuki AKITA
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Publication number: 20160172921Abstract: A side surface at the outside of a plurality of teeth portions of one separated core is faced to a side surface of teeth portions of an adjacent separated core, so as to form a second slot which is straddled between the adjacent separated cores, and a first slot is formed by a plurality of teeth portions of one separated core, and a width size of the first slot is identical to a width size of the second slot, and coil conductor storage space is formed in the first slot via a first insulating component, and coil conductor storage space is formed in the second slot via a second insulating component, and a thickness size of the first insulating component is different from a thickness size of the second insulating component.Type: ApplicationFiled: November 8, 2013Publication date: June 16, 2016Applicant: Mitsubishi Electric CorporationInventors: Manabu YOSHINORI, Atsushi SAKAUE, Tatsuro HINO, Hironori TSUIKI, Shinichi OKADA, Hiroki SHIOTA, Masaya INOUE, Shogo OKAMOTO, Shinji NISHIMURA, Akira HASHIMOTO, Shinkichi SAWA, Yutaka IKURA, Ryuichi KITORA
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Publication number: 20150171690Abstract: An armature winding includes a plurality of distributed winding bodies that are each produced by winding a single conductor wire that is insulated, jointless, and continuous, and that has a constant cross-sectional area perpendicular to a longitudinal direction, the conductor wires include first through third coil end portions that link first through fourth rectilinear portions and first through fourth rectilinear portions, and are formed such that radial widths w? of the first through fourth rectilinear portions are wider than radial widths w of the first through third coil end portions, and first gaps are formed between radially adjacent coil end portions to allow a cooling medium to pass through the first gaps.Type: ApplicationFiled: April 14, 2014Publication date: June 18, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hirohisa YOKOTA, Atsushi SAKAUE, Hironori TSUIKI, Tatsuro HINO, Shinkichi SAWA, Masashi NAKAMURA, Shogo OKAMOTO
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Publication number: 20150171693Abstract: Four layers of first coil rows formed by arranging first coil ends at a pitch of one slot in a circumferential direction are arranged in a radial direction to configure a first coil end group, three layers of second coil rows formed by arranging second coil ends at a pitch of one slot in a circumferential direction are arranged in a radial direction to configure a first coil end group, a cylindrical first insulating paper is housed inside the first coil end rows and inside the second coil end rows, and a cylindrical second insulating paper is housed between the first coil end rows and between the second coil end rows.Type: ApplicationFiled: August 28, 2013Publication date: June 18, 2015Inventors: Atsushi Sakaue, Hiroyuki Akita, Hironori Tsuiki, Masaya Inoue, Shinkichi Sawa, Masashi Nakamura