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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Publication number: 20100207476Abstract: 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: ApplicationFiled: March 26, 2008Publication date: August 19, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiyuki Yoshizawa, Masaya Inoue, Kanji Shinkawa, Masao Morita, Moriyuki Hazeyama, Hiroyuki Akita, Shinji Nishimura, Norihiro Murata
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Publication number: 20100164317Abstract: 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: ApplicationFiled: August 22, 2007Publication date: July 1, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Inoue, Kouki Naka, Hiroyuki Akita, Kanji Shinkawa, Yoshinori Miyamoto, Toshiyuki Yoshizawa, Haruyuki Kometani
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Publication number: 20100096941Abstract: 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: ApplicationFiled: March 9, 2007Publication date: April 22, 2010Applicant: 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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Patent number: 7683740Abstract: An electronic component having: a substrate, a lower conductor layer provided on the substrate; an inorganic dielectric film that covers the lower conductor layer; and an upper conductor layer having an upper electrode portion provided on the inorganic dielectric film. The lower conductor layer has a lower electrode portion that together with the upper electrode portion and the inorganic dielectric film constitutes a capacitor, and a coil portion that constitutes an inductor. The entire inorganic dielectric film is formed integrally, and the lower conductor layer is in contact only with the substrate, inorganic dielectric film, and upper conductor layer.Type: GrantFiled: July 24, 2007Date of Patent: March 23, 2010Assignee: TDK CorporationInventors: Toshiyuki Yoshizawa, Masahiro Miyazaki, Akira Furuya, Masaomi Ishikura, Hajime Kuwajima
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Patent number: 7683269Abstract: A terminal electrode body on a substrate is exposed relative to a resin layer, protruding out beyond the side of the resin layer. That is, the terminal electrode body is not covered by the resin layer. The electronic element is covered by an insulating layer and the terminal electrode body and the electronic element are electrically connected. Hence, an electric signal applied to the terminal electrode body can be transmitted to the electronic element. A cover layer covers the terminal electrode body and the boundary between the terminal electrode body and the resin layer.Type: GrantFiled: March 21, 2008Date of Patent: March 23, 2010Assignee: TDK CorporationInventors: Toshiyuki Yoshizawa, Masaomi Ishikura, Masahiro Miyazaki, Akira Furuya, Nobuyuki Okuzawa
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Patent number: 7656069Abstract: First and second magnet holding apertures are disposed through first and second permanent magnet holding seats that are disposed so as to protrude from first and second yoke portions so as to have aperture centers that are oriented in an axial direction. Cylindrical resin first and second magnet loading portions are disposed so as to project integrally on first and second fans such that central axes thereof are oriented in the axial direction, and first and second permanent magnets are insert-molded into the first and second magnet loading portions. The first and second fans are fixed to first and second pole cores by fitting the first and second magnet loading portions together with the first and second magnet holding apertures.Type: GrantFiled: July 1, 2008Date of Patent: February 2, 2010Assignee: Mitsubishi Electric CorporationInventors: Kanji Shinkawa, Masaya Inoue, Hiroyuki Akita, Norihiro Murata, Toshiyuki Yoshizawa, Shinji Nishimura
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Patent number: 7605519Abstract: A magnet seat is disposed on a second yoke portion and projects into respective spaces between circumferentially-adjacent pairs of second claw-shaped magnetic pole portions, and permanent magnets are disposed only near the second yoke portion so as to be held by the magnet seat so as to face an inner circumferential surface near a tip end of each of a plurality of first claw-shaped magnetic pole portions. Each of the permanent magnets is magnetically oriented in a reverse direction to an orientation of a magnetic field that a field coil produces.Type: GrantFiled: August 11, 2008Date of Patent: October 20, 2009Assignee: Mitsubishi Electric CorporationInventors: Masao Morita, Masaya Inoue, Kanji Shinkawa, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Shinji Nishimura
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Patent number: 7567424Abstract: This electronic component comprises a substrate; and a capacitor part provided on the substrate, the capacitor part includes a first electrode part provided on the substrate; a dielectric film covering the first electrode part; an insulating film that contacts the dielectric film and has an opening part; and a second electrode part that contacts an inner wall surface of the opening part of the insulating film and a surface of the dielectric film, and when the angle between a first interface between the dielectric film and the insulating film, and a second interface between the insulating film and the second electrode part is ?, ? is not more than 22°.Type: GrantFiled: March 21, 2008Date of Patent: July 28, 2009Assignee: TDK CorporationInventor: Toshiyuki Yoshizawa
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Patent number: 7560851Abstract: A dynamoelectric machine includes: a permanent magnet holding portion that is disposed integrally so as to project from the yoke portion on a portion of the pair of yoke portions that faces an inner circumferential surface near a tip end of the plurality of claw-shaped magnetic pole portions; an arc-shaped magnet holding aperture that has a C-shaped cross section that is formed in each of the permanent magnet holding portions so as to have an aperture center that is oriented axially, in which at least one axial end is open, and that opens radially outward; a magnet holding member that is made of a nonmagnetic material that is fitted into and held by the magnet holding aperture; and a permanent magnet that is held by the magnet holding member so as to face the inner circumferential surface near the tip end of the claw-shaped magnetic pole portions, that is prepared into a prismatic body that has a quadrilateral cross section perpendicular to an axial direction, and that is magnetically oriented in a reverse diType: GrantFiled: June 18, 2008Date of Patent: July 14, 2009Assignee: Mitsubishi Electric CorporationInventors: Masaya Inoue, Kanji Shinkawa, Shinji Nishimura, Hiroyuki Akita, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Norihiro Murata, Masao Morita
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Publication number: 20090066175Abstract: A magnet seat is disposed on a second yoke portion and projects into respective spaces between circumferentially-adjacent pairs of second claw-shaped magnetic pole portions, and permanent magnets are disposed only near the second yoke portion so as to be held by the magnet seat so as to face an inner circumferential surface near a tip end of each of a plurality of first claw-shaped magnetic pole portions. Each of the permanent magnets is magnetically oriented in a reverse direction to an orientation of a magnetic field that a field coil produces.Type: ApplicationFiled: August 11, 2008Publication date: March 12, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masao MORITA, Masaya Inoue, Kanji Shinkawa, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Shinji Nishimura
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Publication number: 20090009021Abstract: First and second magnet holding apertures are disposed through first and second permanent magnet holding seats that are disposed so as to protrude from first and second yoke portions so as to have aperture centers that are oriented in an axial direction. Cylindrical resin first and second magnet loading portions are disposed so as to project integrally on first and second fans such that central axes thereof are oriented in the axial direction, and first and second permanent magnets are insert-molded into the first and second magnet loading portions. The first and second fans are fixed to first and second pole cores by fitting the first and second magnet loading portions together with the first and second magnet holding apertures.Type: ApplicationFiled: July 1, 2008Publication date: January 8, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kanji Shinkawa, Masaya Inoue, Hiroyuki Akita, Norihiro Murata, Toshiyuki Yoshizawa, Shinji Nishimura
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Publication number: 20090009025Abstract: 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: July 18, 2008Publication date: January 8, 2009Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiko FUJITA, Toshiyuki Yoshizawa, Haruyuki Kometani
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Publication number: 20080315701Abstract: A dynamoelectric machine includes: a permanent magnet holding portion that is disposed integrally so as to project from the yoke portion on a portion of the pair of yoke portions that faces an inner circumferential surface near a tip end of the plurality of claw-shaped magnetic pole portions; an arc-shaped magnet holding aperture that has a C-shaped cross section that is formed in each of the permanent magnet holding portions so as to have an aperture center that is oriented axially, in which at least one axial end is open, and that opens radially outward; a magnet holding member that is made of a nonmagnetic material that is fitted into and held by the magnet holding aperture; and a permanent magnet that is held by the magnet holding member so as to face the inner circumferential surface near the tip end of the claw-shaped magnetic pole portions, that is prepared into a prismatic body that has a quadrilateral cross section perpendicular to an axial direction, and that is magnetically oriented in a reverse diType: ApplicationFiled: June 18, 2008Publication date: December 25, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Inoue, Kanji Shinkawa, Shinji Nishimura, Hiroyuki Akita, Toshiyuki Yoshizawa, Moriyuki Hazeyama, Norihiro Murata, Masao Morita
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Publication number: 20080252167Abstract: 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: ApplicationFiled: June 20, 2008Publication date: October 16, 2008Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Haruyuki Kometani, Toshiyuki Yoshizawa, Yoshihito Asao
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Publication number: 20080239626Abstract: This electronic component comprises a substrate; and a capacitor part provided on the substrate, the capacitor part includes a first electrode part provided on the substrate; a dielectric film covering the first electrode part; an insulating film that contacts the dielectric film and has an opening part; and a second electrode part that contacts an inner wall surface of the opening part of the insulating film and a surface of the dielectric film, and when the angle between a first interface between the dielectric film and the insulating film, and a second interface between the insulating film and the second electrode part is ?, ? is not more than 22°.Type: ApplicationFiled: March 21, 2008Publication date: October 2, 2008Applicant: TDK CORPORATIONInventor: Toshiyuki Yoshizawa
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Publication number: 20080236885Abstract: A terminal electrode body on a substrate is exposed relative to a resin layer, protruding out beyond the side of the resin layer. That is, the terminal electrode body is not covered by the resin layer. The electronic element is covered by an insulating layer and the terminal electrode body and the electronic element are electrically connected. Hence, an electric signal applied to the terminal electrode body can be transmitted to the electronic element. A cover layer covers the terminal electrode body and the boundary between the terminal electrode body and the resin layer.Type: ApplicationFiled: March 21, 2008Publication date: October 2, 2008Applicant: TDK CORPORATIONInventors: Toshiyuki YOSHIZAWA, Masaomi ISHIKURA, Masahiro MIYAZAKI, Akira FURUYA, Nobuyuki OKUZAWA
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Publication number: 20080238242Abstract: The dynamoelectric machine includes: a Lundell rotor that has: a pole core in which tapered claw-shaped magnetic pole portions are arranged in rows circumferentially so as to extend axially alternately from two axial ends and intermesh with each other; and a field coil that is mounted to the pole core; and a stator that has: a cylindrical stator core that surrounds the rotor so as to have a predetermined air gap; and a stator coil that is mounted to the stator core. The stator core is prepared by laminating and integrating dull finish magnetic steel plates, and a space factor of an iron portion in the stator core is in a range of 96 percent plus or minus 0.5 percent.Type: ApplicationFiled: March 28, 2008Publication date: October 2, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Toshiyuki YOSHIZAWA, Haruyuki Kometani, Shinji Nishimura, Masahiko Fujita, Masaya Inoue
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Patent number: 7420314Abstract: 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: June 9, 2006Date of Patent: September 2, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiko Fujita, Toshiyuki Yoshizawa, Haruyuki Kometani
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Publication number: 20080023219Abstract: An electronic component having: a substrate, a lower conductor layer provided on the substrate; an inorganic dielectric film that covers the lower conductor layer; and an upper conductor layer having an upper electrode portion provided on the inorganic dielectric film. The lower conductor layer has a lower electrode portion that together with the upper electrode portion and the inorganic dielectric film constitutes a capacitor, and a coil portion that constitutes an inductor. The entire inorganic dielectric film is formed integrally, and the lower conductor layer is in contact only with the substrate, inorganic dielectric film, and upper conductor layer.Type: ApplicationFiled: July 24, 2007Publication date: January 31, 2008Applicant: TDK CORPORATIONInventors: Toshiyuki Yoshizawa, Masahiro Miyazaki, Akira Furuya, Masaomi Ishikura, Hajime Kuwajima
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Publication number: 20060290232Abstract: 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: June 9, 2006Publication date: December 28, 2006Inventors: Masahiko Fujita, Toshiyuki Yoshizawa, Haruyuki Kometani