Patents by Inventor Tomohiro Kikuchi
Tomohiro Kikuchi 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: 20240083364Abstract: A vehicle article storage structure includes an article storage box (13) provided with an opening (33a) on the upper side forgetting articles in and out, a housing unit (15) provided on the lower side of an instrument panel (3) to house the article storage box (13), and links (35, 37, and 39) configured to movably support the article storage box (13) along a range from a housed position at which the article storage box (13) is housed in the housing unit (15) to a drawn position at which the article storage box (13) is drawn in a vehicle compartment rearward direction from the housed position via an intermediate position at which the article storage box (13) is located between the housed position and the drawn position, the intermediate position being located below the housed position and the drawn position.Type: ApplicationFiled: October 7, 2020Publication date: March 14, 2024Applicants: Nissan Motor Co., Ltd., Marelli CorporationInventors: Takeshi Nishimura, Shota Watase, Tomohiro Watanabe, Masato Abe, Masami Kikuchi
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Patent number: 8601671Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions, applying a force at an outer periphery of the stator and directed inwardly cancels the pulsating components of the cogging torque.Type: GrantFiled: August 15, 2012Date of Patent: December 10, 2013Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Publication number: 20120304453Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions, applying a force at an outer periphery of the stator and directed inwardly cancels the pulsating components of the cogging torque.Type: ApplicationFiled: August 15, 2012Publication date: December 6, 2012Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Publication number: 20110047782Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions, applying a force at an outer periphery of the stator and directed inwardly cancels the pulsating components of the cogging torque.Type: ApplicationFiled: November 10, 2010Publication date: March 3, 2011Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Patent number: 7849584Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions, applying a force at an outer periphery of the stator and directed inwardly cancels the pulsating components of the cogging torque.Type: GrantFiled: November 12, 2008Date of Patent: December 14, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yukari Toide, Akhiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Publication number: 20090064486Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions, applying a force at an outer periphery of the stator and directed inwardly cancels the pulsating components of the cogging torque.Type: ApplicationFiled: November 12, 2008Publication date: March 12, 2009Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Patent number: 7474027Abstract: A permanent magnet motor 1 includes a rotor in which permanent magnets 31 are fixed. In the rotor 20, the outer peripheral shape of rotor magnetic-pole portions 24 is formed so that, in the circumferentially central portion, the distance from the center of the rotor iron core 21 is longest, and, at the inter-polar space, the distance from the center of the rotor iron core is shortest, and so that the outermost surface of the rotor magnetic-pole portions 24 forms an arc, and given that sheath thickness tc formed by the outer-side surface of each permanent magnet 31 and the outermost surface of each rotor magnetic-pole portion 24 is practically constant, and letting the thickness of the permanent magnets be the magnet thickness tm, then the relation tc/tm?0.25 is satisfied.Type: GrantFiled: January 15, 2003Date of Patent: January 6, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kikuchi, Takashi Miyazaki, Haruyuki Kometani, Shinichi Yamaguchi
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Patent number: 7466055Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions applying a force at an outer periphery of the stator directed inwardly to cancel the pulsating components of the cogging torque.Type: GrantFiled: August 26, 2004Date of Patent: December 16, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Patent number: 7405505Abstract: A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(?) at mechanical angle ?, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns?Np|).Type: GrantFiled: August 5, 2004Date of Patent: July 29, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Chiyo Fujino, Tomohiro Kikuchi, Takashi Miyazaki
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Publication number: 20080106164Abstract: A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(?) at mechanical angle ?, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns?Np|). Stress-relieving spaces are located in portions of the frame in an arrangement that does not have 90-degree mechanical angle rotational symmetry, in such a way that the sum P of inclusion ratios for the k-th component Tk and the Np-th component TNp, which are the Fourier series expansion coefficients for the frame thickness T(?) expressed by equation (2). P = ( T k + T N ? ? p ) / ? n = 0 ? ? T n × 100 ? [ % ] ( 2 ) , is less than 12%.Type: ApplicationFiled: August 5, 2004Publication date: May 8, 2008Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Chiyo Fujino, Tomohiro Kikuchi, Takashi Miyazaki
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Patent number: 7342338Abstract: A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle ?r in electrical angle to decrease a first frequency component of cogging torque in the circumferential direction of the rotor iron core between two stages of the permanent magnets, a stator iron core 21 of cylindrical shape provided with the stator winding for producing a rotating magnetic field causing the rotor 30 to be rotated, and a stator 20 dividing the stator iron core 21 into plural blocks in the axial direction, and shifted by a stage skew angle ?s in electrical angle to decrease a second frequency component of the cogging torque in the circumferential direction of the stator iron core 21.Type: GrantFiled: April 11, 2003Date of Patent: March 11, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takashi Miyazaki, Tomohiro Kikuchi, Haruyuki Kometani, Shinichi Yamaguchi
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Patent number: 7196445Abstract: A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) ?e. A stator having a tubular stator core in which the rotor disposed, includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle ?e larger than 30 degrees (electrical angle). A ratio, of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle ?e, and B-H curve properties of the stator core.Type: GrantFiled: May 2, 2006Date of Patent: March 27, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Tomohiro Kikuchi, Takashi Miyazaki
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Publication number: 20060244335Abstract: A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle ?r in electrical angle to decrease a first frequency component of cogging torque in the circumferential direction of the rotor iron core between two stages of the permanent magnets, a stator iron core 21 of cylindrical shape provided with the stator winding for producing a rotating magnetic field causing the rotor 30 to be rotated, and a stator 20 dividing the stator iron core 21 into plural blocks in the axial direction, and shifted by a stage skew angle ?s in electrical angle to decrease a second frequency component of the cogging torque in the circumferential direction of the stator iron core 21.Type: ApplicationFiled: April 11, 2003Publication date: November 2, 2006Inventors: Takashi Miyazaki, Tomohiro Kikuchi, Haruyuki Kometani, Shinichi Yamaguchi
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Publication number: 20060192456Abstract: A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) ?e. A stator having a tubular stator core in which the rotor disposed, includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle ?e larger than 30 degrees (electrical angle). A ratio, of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle ?e, and B-H curve properties of the stator core.Type: ApplicationFiled: May 2, 2006Publication date: August 31, 2006Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Tomohiro Kikuchi, Takashi Miyazaki
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Patent number: 7067948Abstract: A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) ?e. A stator having a tubular stator core in which the rotor disposed includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle ?e larger than 30 degrees (electrical angle). A ratio of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle ?e, and B-H curve properties of the stator core.Type: GrantFiled: October 9, 2003Date of Patent: June 27, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Tomohiro Kikuchi, Takashi Miyazaki
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Publication number: 20060131976Abstract: A permanent magnet motor 1 includes a rotor in which permanent magnets 31 are fixed. In the rotor 20, the outer peripheral shape of rotor magnetic-pole portions 24 is formed so that, in the circumferentially central portion, the distance from the center of the rotor iron core 21 is longest, and, at the inter-polar space, the distance from the center of the rotor iron core is shortest, and so that the outermost surface of the rotor magnetic-pole portions 24 forms an arc, and given that sheath thickness tc formed by the outer-side surface of each permanent magnet 31 and the outermost surface of each rotor magnetic-pole portion 24 is practically constant, and letting the thickness of the permanent magnets be the magnet thickness tm, then the relation tc/tm?0.25 is satisfied.Type: ApplicationFiled: January 15, 2003Publication date: June 22, 2006Inventors: Tomohiro Kikuchi, Takashi Miyazaki, Haruyuki Kometani, Shinichi Yamaguchi
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Patent number: 7034424Abstract: A permanent magnet rotating machine includes a rotor with a permanent magnet having circumferential magnetic poles with a skew at boundaries between magnetic poles of the permanent magnet, and a stator having a stator iron core in an almost cylindrical shape and convex poles protruding inwardly, the rotor being disposed within the stator. A skew angle of the skew is smaller than a theoretical angle ?s (electrical angle) and larger than one-half the theoretical angle ?s, wherein the theoretical angle ?s is defined as, ?s=180×(number of magnetic poles in the rotor)/smallest integer of which both the number of magnetic poles in the rotor and the number of magnetic poles in the stator are factors) [deg.].Type: GrantFiled: June 25, 2004Date of Patent: April 25, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Haruyuki Kometani, Shinichi Yamaguchi, Tomohiro Kikuchi, Takashi Tamura
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Publication number: 20060049713Abstract: In a combination of, for example, a rotor having eight magnetic poles and a stator having twelve slots and pulsating components of permeance, which generate a sinusoidal cogging torque having maxima of the same number as the number of poles of the rotor, pressurizing parts arranged in predetermined positions applying a force at an outer periphery of the stator directed inwardly to cancel the pulsating components of the cogging torque.Type: ApplicationFiled: August 26, 2004Publication date: March 9, 2006Inventors: Yukari Toide, Akihiro Daikoku, Masatsugu Nakano, Hideaki Arita, Shinichi Yamaguchi, Moriyuki Hazeyama, Takashi Yoshioka, Tomohiro Kikuchi, Katsumi Hayami, Takashi Miyazaki
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Publication number: 20050012419Abstract: A permanent magnet rotating machine includes a rotor with a permanent magnet having circumferential magnetic poles with a skew at boundaries between magnetic poles of the permanent magnet, and a stator having a stator iron core in an almost cylindrical shape and convex poles protruding inwardly, the rotor being disposed within the stator. A skew angle of the skew is smaller than a theoretical angle ?s (electrical angle) and larger than one-half the theoretical angle ?s, wherein the theoretical angle ?s is defined as, ?s=180×(number of magnetic poles in the rotor)/(smallest integer of which both the number of magnetic poles in the rotor and the number of magnetic poles in the stator are factors) [deg.Type: ApplicationFiled: June 25, 2004Publication date: January 20, 2005Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Haruyuki Kometani, Shinichi Yamaguchi, Tomohiro Kikuchi, Takashi Tamura
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Publication number: 20040124728Abstract: A permanent-magnet rotating machine includes a rotor having a rotor core carrying on its curved outer surface multiple permanent magnets arranged in two rows along an axial direction in such a manner that the permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) &thgr;e, and a stator having a cylindrical stator core in which the rotor is disposed, the stator core being provided with stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle &thgr;e is set at a value larger than 30 degrees (electrical angle).Type: ApplicationFiled: October 9, 2003Publication date: July 1, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Shinichi Yamaguchi, Haruyuki Kometani, Tomohiro Kikuchi, Takashi Miyazaki