Patents by Inventor Toshiyuki Yoshizawa
Toshiyuki Yoshizawa 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: 8368274Abstract: Dynamoelectric machine having holding grooves recessed into yoke portions with openings on respective facing portions of inner wall surfaces of trough portions, at axially inner ends of the yoke portions, having axial groove directions, and an end surface in a groove length direction constitutes a stopping surface. Magnet material holders are disposed spanning the trough portions radially inside inner circumferential surfaces near tip ends of claw-shaped magnetic pole portions, fitted from axially inside into each holding groove, are recessed to face each other on the trough portions restricting circumferential and radial motion by inner wall surfaces of the holding grooves and axially outward movement restricted by the stopping surface.Type: GrantFiled: November 10, 2008Date of Patent: February 5, 2013Assignee: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Ryuichi Shimomura, Takuma Wada, Kanji Shinkawa, Masao Morita, Yoshiharu Hayashi, Kazuya Nakamachi, Kazunori Tanaka
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Patent number: 8334633Abstract: The present invention provides a dynamoelectric machine that enables heat that is generated in a permanent magnet to be transmitted to a fan and be radiated from the fan effectively, that suppresses occurrences of damage to the fan that result from centrifugal forces that act on the permanent magnet, and that also enables the fan to be prepared easily and inexpensively.Type: GrantFiled: April 4, 2008Date of Patent: December 18, 2012Assignee: Mitsubishi Electric CorporationInventors: Moriyuki Hazeyama, Hiroyuki Akita, Ryuichi Shimomura, Masaya Inoue, Masao Morita, Toshiyuki Yoshizawa, Shinji Nishimura, Kazunori Tanaka
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Patent number: 8324780Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by disposing trough portions on yoke portions and disposing magnet holders that hold the permanent magnets so as to span the trough portions to ensure outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on respective portions of yoke portions between circumferentially adjacent claw-shaped magnetic pole portions, a magnet holder is disposed so as to span over a trough portion, and a permanent magnet is held by the magnet holder. A lead wire is led out of a rotor from a field coil so as to pass through a space that is bounded by the trough portion and the magnet holder.Type: GrantFiled: March 21, 2008Date of Patent: December 4, 2012Assignee: Mitsubishi Electric CorporationInventors: Masaya Inoue, Masao Morita, Kanji Shinkawa, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Hirokazu Akai, Kazunori Tanaka, Shinji Nishimura, Hiroyuki Akita, Ryuichi Shimomura
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Patent number: 8304950Abstract: A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance.Type: GrantFiled: April 28, 2008Date of Patent: November 6, 2012Assignee: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Kanji Shinkawa, Masao Morita, Moriyuki Hazeyama, Takeshi Mori, Hiroyuki Akita, Ryuichi Shimomura, Kazunori Tanaka, Shinji Nishimura
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Patent number: 8304951Abstract: The present invention provides a dynamoelectric machine that enables permanent magnets to be held stably in trough portions that are formed on portions of a yoke portion that are positioned between adjacent claw-shaped magnetic pole portions. In a dynamoelectric machine according to the present invention, first and second magnet holders are disposed so as to span first and second trough portions that are formed on portions of first and second yoke portions that are positioned between circumferentially adjacent first and second claw-shaped magnetic pole portions, and first and second permanent magnets are held by the first and second magnet holders so as to face inner circumferential surfaces near tip ends of the claw-shaped magnetic pole portions so as to have a predetermined clearance.Type: GrantFiled: February 13, 2008Date of Patent: November 6, 2012Assignee: Mitsubishi Electric CorporationInventors: Ryuichi Shimomura, Hiroyuki Akita, Masaya Inoue, Toshiyuki Yoshizawa
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Publication number: 20120158245Abstract: A first DC/DC converter is connected to a higher-voltage output terminal of a rectifier by alternator wiring, a battery that supplies electric power to an on-board load is connected to the first DC/DC converter, a second DC/DC converter is connected to the higher-voltage output terminal of the rectifier by alternator wiring, and an electrical double-layer capacitor is connected to the second DC/DC converter.Type: ApplicationFiled: October 13, 2010Publication date: June 21, 2012Applicant: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Takahiro Urakabe, Tatsuya Okuda, Yuuya Tanaka, Takayoshi Nagai, Shigeki Harada
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Patent number: 8148864Abstract: A dynamoelectric machine includes first and second magnet seat portions disposed to project from portions of first and second yoke portions that face respective inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions, and magnet housing portions disposed integrally to extend axially outward from outer circumferential portions of a pair of flange portions of a bobbin, extend near the first and second yoke portions that face the inner circumferential surfaces near the tip ends of the first and second claw-shaped magnetic pole portions, and be held by the first and second magnet seat portions.Type: GrantFiled: March 26, 2008Date of Patent: April 3, 2012Assignee: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Kanji Shinkawa, Masao Morita, Moriyuki Hazeyama, Hiroyuki Akita, Shinji Nishimura, Norihiro Murata
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Patent number: 7994684Abstract: An automotive generator that includes a Lundell rotor. First and second protruding portions are disposed so as to project from inner wall surfaces of portions of first and second yoke portions at root portions of first and second claw-shaped magnetic pole portions, and first and second recess portions are recessed into inner wall surfaces of portions of the first and second yoke portions that face the second and first protruding portions. In addition, a shape of a region in which the field coil is disposed is configured into a wave shape that has a cross-sectional shape in a plane that includes a central axis of the pole core that is approximately constant in a circumferential direction and that zigzags alternately in an axial direction at positions of each of the first and second claw-shaped magnetic pole portions.Type: GrantFiled: August 22, 2007Date of Patent: August 9, 2011Assignee: Mitsubishi Electric CorporationInventors: Masaya Inoue, Kouki Naka, Hiroyuki Akita, Kanji Shinkawa, Yoshinori Miyamoto, Toshiyuki Yoshizawa, Haruyuki Kometani
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Publication number: 20110181142Abstract: The present invention provides a dynamoelectric machine and a method for manufacturing a rotor therefor that can hold permanent magnets stably for a long time by a simple magnet holding construction.Type: ApplicationFiled: November 10, 2008Publication date: July 28, 2011Inventors: Toshiyuki Yoshizawa, Masaya Inoue, Ryuichi Shimomura, Takuma Wada, Kanji Shinkawa, Masao Morita, Yoshiharu Hayashi, Kazuya Nakamachi, Kazunori Tanaka
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Publication number: 20110148232Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by ensuring outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on portions of yoke portions between respective circumferentially adjacent claw-shaped magnetic pole portions. Magnet holders are disposed so as to span over all of the trough portions on a pole core body at a rear end excluding a predetermined trough portion, and permanent magnets are held in each of the magnet holders. A field coil lead wire is led out from the rotor so as to pass through the trough portion over which a magnet holder is not disposed.Type: ApplicationFiled: October 1, 2008Publication date: June 23, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takeshi Mori, Masaya Inoue, Masao Morita, Hirokazu Akai, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Shinji Nishimura, Kazunori Tanaka
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Publication number: 20110043068Abstract: A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance.Type: ApplicationFiled: April 28, 2008Publication date: February 24, 2011Applicant: Mitsubishi Electric CorporationInventors: Toshiyuki Yoshizawa, Masaya Inoue, Kanji Shinkawa, Masao Morita, Moriyuki Hazeyama, Takeshi Mori, Hiroyuki Akita, Ryuichi Shimomura, Kazunori Tanaka, Shinji Nishimura
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Patent number: 7893594Abstract: An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.Type: GrantFiled: May 24, 2010Date of Patent: February 22, 2011Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Toshiyuki Yoshizawa, Haruyuki Kometani
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Publication number: 20110012449Abstract: The present invention provides a dynamoelectric machine that enables heat that is generated in a permanent magnet to be transmitted to a fan and be radiated from the fan effectively, that suppresses occurrences of damage to the fan that result from centrifugal forces that act on the permanent magnet, and that also enables the fan to be prepared easily and inexpensively.Type: ApplicationFiled: April 4, 2008Publication date: January 20, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Moriyuki Hazeyama, Hiroyuki Akita, Ryuichi Shimomura, Masaya Inoue, Masao Morita, Toshiyuki Yoshizawa, Shinji Nishimura, Kazunori Tanaka
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Publication number: 20110001383Abstract: The present invention provides a dynamoelectric machine that enables permanent magnets to be held stably in trough portions that are formed on portions of a yoke portion that are positioned between adjacent claw-shaped magnetic pole portions. In a dynamoelectric machine according to the present invention, first and second magnet holders are disposed so as to span first and second trough portions that are formed on portions of first and second yoke portions that are positioned between circumferentially adjacent first and second claw-shaped magnetic pole portions, and first and second permanent magnets are held by the first and second magnet holders so as to face inner circumferential surfaces near tip ends of the claw-shaped magnetic pole portions so as to have a predetermined clearance.Type: ApplicationFiled: February 13, 2008Publication date: January 6, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ryuichi Shimomura, Hiroyuki Akita, Masaya Inoue, Toshiyuki Yoshizawa
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Publication number: 20110001374Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by disposing trough portions on yoke portions and disposing magnet holders that hold the permanent magnets so as to span the trough portions to ensure outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on respective portions of yoke portions between circumferentially adjacent claw-shaped magnetic pole portions, a magnet holder is disposed so as to span over a trough portion, and a permanent magnet is held by the magnet holder. A lead wire is led out of a rotor from a field coil so as to pass through a space that is bounded by the trough portion and the magnet holder.Type: ApplicationFiled: March 21, 2008Publication date: January 6, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Inoue, Masao Morita, Kanji Shinkawa, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Hirokazu Akai, Kazunori Tanaka, Shinji Nishimura, Hiroyuki Akita, Ryuichi Shimomura
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Patent number: 7847463Abstract: A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a shape of the plane of projection.Type: GrantFiled: June 20, 2008Date of Patent: December 7, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Haruyuki Kometani, Toshiyuki Yoshizawa, Yoshihito Asao
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Patent number: 7843107Abstract: A dynamoelectric machine including first and second permanent magnets held by first and second magnet seats on first and second yoke portions so as to face inner circumferential surfaces of tip end portions of first and second claw-shaped magnetic pole portions. The first and second permanent magnets are magnetically oriented in a reverse direction to orientation of a magnetic field that the field coil produces. The dynamoelectric machine enables permanent magnet holding reliability to be increased, induced voltage during no-load de-energization to be suppressed, and thermal demagnetization of magnets due to high-frequency magnetic fields that are induced by stator slots to be avoided.Type: GrantFiled: March 9, 2007Date of Patent: November 30, 2010Assignee: Mitsubishi Electric CorporationInventors: Masaya Inoue, Kanji Shinkawa, Masao Morita, Haruyuki Kometani, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Keiichi Ito, Takeshi Mori, Hiroyuki Akita, Yoshinori Miyamoto, Shinji Nishimura
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Publication number: 20100246090Abstract: To provide a thin film capacitor having a device structure for suppressing peeling between an insulating film and a substrate. A thin film capacitor 100 has a laminate structure that is formed by laminating a lower electrode 20, a dielectric film 30, and an upper electrode 40 in sequence on a substrate 10. An adhesion layer 41 is formed on a side surface of the lower electrode 20 via the dielectric film 30, and an insulating film 50 in contact with the adhesion layer 41 covers the laminate structure. According to this device structure, the adhesion layer 41 having excellent adhesiveness to the insulating film 50 is disposed between the insulating film 50 and the dielectric film 30, so that peeling of the insulating film 50 can be suppressed.Type: ApplicationFiled: March 4, 2010Publication date: September 30, 2010Applicant: TDK CORPORATIONInventors: Toshiyuki YOSHIZAWA, Akira FURUYA, Masaomi ISHIKURA, Keisuke TAKASUGI, Hiroshi TAKE
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Publication number: 20100231080Abstract: An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.Type: ApplicationFiled: May 24, 2010Publication date: September 16, 2010Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiko FUJITA, Toshiyuki YOSHIZAWA, Haruyuki KOMETANI
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Patent number: 7781934Abstract: An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.Type: GrantFiled: July 18, 2008Date of Patent: August 24, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Toshiyuki Yoshizawa, Haruyuki Kometani