Patents by Inventor Akihiro Daikoku
Akihiro Daikoku 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: 20090302788Abstract: A regenerating braking system is provided, which includes: a synchronous motor with field coil excitation including a cylindrical stator coil, an inverter electrically connected to the stator coil, a battery electrically connected to the inverter, a rotor coil provided in an internal space of the stator coil, a two-way switch electrically connected to the rotor coil, and a capacitor electrically connected to the two-way switch; and a controller, wherein when the first differential calculus of acceleration of a load on the synchronous motor becomes negative, the controller stores regenerative power regenerated in the rotor coil from the stator coil, in the capacitor through the two-way switch, and wherein the controller supplies the regenerative power stored in the capacitor to the rotor coil through the two-way switch.Type: ApplicationFiled: June 4, 2009Publication date: December 10, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kenrou Mitsuda, Masaya Inoue, Ikurou Suga, Akihiro Daikoku
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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: 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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Publication number: 20060248707Abstract: A method for manufacturing an armature including securing a core to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof, forming a coil composed of a plurality of coil portions by simultaneously winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core, securing a commutator to the shaft having a plurality of segments, adjacent coil portions having a slot along one side thereof, and electronically connecting segments which should have the same electric potential by means of equalizing connectors so that each pairs of the segments that should have the same electric potential has a substantially equal electric potential.Type: ApplicationFiled: July 10, 2006Publication date: November 9, 2006Inventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Mitsuyuki Tsumura
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Patent number: 7114236Abstract: A method for manufacturing an armature including securing a core to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof, forming a coil composed of a plurality of coil portions by simultaneously winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core, securing a commutator to the shaft having a plurality of segments, adjacent coil portions having a slot along one side thereof, and electrically connecting segments which should have the same electric potential by means of equalizing connectors so that each pairs of the segments that should have the same electric potential has a substantially equal electrical potential.Type: GrantFiled: April 29, 2004Date of Patent: October 3, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Mitsuyuki Tsumura
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Patent number: 7099090Abstract: An optical pickup lens having a lens and a lens holder, each of which has at least one mark in a direction of rotation based on an optical axis of the lens as a center of rotation. The mark(s) of the lens holder is provided so as to oppose the mark(s) of the lens. Preferably, the marks of the lens and the marks of the lens holder are provided at regular intervals. Since both the lens and the lens holder have the marks thereon, the lens can be mounted on the lens holder at a predetermined angle in the direction of rotation of the lens based on the center of rotation of the lens.Type: GrantFiled: February 23, 2004Date of Patent: August 29, 2006Assignee: Sharp Kabushiki KaishaInventor: Akihiro Daikoku
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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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Patent number: 6844649Abstract: An armature includes a plurality of equalizing connectors for permanently electrically connecting pairs of commutator segments that should have the same electric potential, so that each of the pairs of the commutator segments that should have the same electric potential has a substantially equal electrical potential. In one embodiment, at least one pair of adjacent coil portions share a common slot.Type: GrantFiled: November 14, 2001Date of Patent: January 18, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Mitsuyuki Tsumura
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Publication number: 20040201302Abstract: A method for manufacturing an armature including securing a core to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof, forming a coil composed of a plurality of coil portions simultaneously winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core, securing a commutator to the shaft having a plurality of segments, adjacent coil portions having a slot along one side thereof, and electrically connecting segments which should have the same electric potential by means of equalizing connectors so that each pairs of the segments that should have the same electric potential has a substantially equal electrical potential.Type: ApplicationFiled: April 29, 2004Publication date: October 14, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Mitsuyuki Tsumura
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Patent number: 6774525Abstract: The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, “n” is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.Type: GrantFiled: August 17, 2001Date of Patent: August 10, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
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Patent number: 6737778Abstract: A rotary electromechanical device includes a first motor including a first stator and a first rotor, a second motor including a second stator and a second rotor, and variable power supplies for driving the respective motors independently of each other, The motors are arranged in series along the axial direction of a rotary shaft. Magnetic poles of the same polarity of the rotors are located at uniform angular positions around the rotary shaft while magnetic poles of the stator of the motor and magnetic poles of the stator of the second motor are displaced from each other in the circumferential direction of the rotary shaft.Type: GrantFiled: September 14, 2001Date of Patent: May 18, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akihiro Daikoku, Naoki Hashiguchi
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Patent number: 6703751Abstract: The present invention provides a dynamo-electric machine that suppresses vibrations caused by imbalance due to electromagnetic forces and that also suppresses imbalance in magnetic attraction forces generated owing to the difference in the number of coil portions among electric circuit portions. This dynamo-electric machine comprises an armature having a winding consisting of a plurality of coil portions each formed by lap-winding a conductor between a corresponding pair of slots formed in an outer circumferential surface portion of a core fixed to a shaft in such a way as to extend in an axial direction thereof, a commutator fixed to an end portion of the shaft and having a plurality of segments to which both end sections of said coil portions are electrically connected, brushes made to respectively abut against the surfaces of the segments of the commutator, and equalizers for connecting said segments, which are to be at equal electric potential, to each other.Type: GrantFiled: August 17, 2001Date of Patent: March 9, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
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Publication number: 20020113511Abstract: A rotary electromechanical device of the invention comprises a motor (A3) including a stator (3b) and a rotor (6a), a motor (B4) including a stator (4b) and a rotor (6b), and variable power supplies (2a, 2b) for driving the respective motors (A3, B4) independently of each other, wherein the motors (A3, B4) are arranged in series along the axial direction of a rotary shaft (5). Magnetic poles of the same polarity of the rotors (6a, 6b) are located at the same angular positions around the rotary shaft (5) while magnetic poles (+U1) of the stator (3b) of the motor (A3) and magnetic poles (+U1) of the stator (4b) of the motor (B4) are displaced from each other in the circumferential direction of the rotary shaft (5).Type: ApplicationFiled: September 14, 2001Publication date: August 22, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Akihiro Daikoku, Naoki Hashiguchi
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Publication number: 20020113514Abstract: The present invention provides a dynamo-electric machine that suppresses vibrations caused by imbalance due to electromagnetic forces and that also suppresses imbalance in magnetic attraction forces generated owing to the difference in the number of coil portions among electric circuit portions. This dynamo-electric machine comprises an armature having a winding consisting of a plurality of coil portions each formed by lap-winding a conductor between a corresponding pair of slots formed in an outer circumferential surface portion of a core fixed to a shaft in such a way as to extend in an axial direction thereof, a commutator fixed to an end portion of the shaft and having a plurality of segments to which both end sections of said coil portions are electrically connected, brushes made to respectively abut against the surfaces of the segments of the commutator, and equalizers for connecting said segments, which are to be at equal electric potential, to each other.Type: ApplicationFiled: August 17, 2001Publication date: August 22, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
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Publication number: 20020079774Abstract: The present invention provides a dynamo-electric machine that prevents the lead portions of the coil portions disposed at places, at which mechanical balance is provided, from intersecting each other, that enhances the workability in manufacturing the wiring by wiring a conductor, and that suppresses the defective insulation of the winding. This dynamo-electric machine for use in an electric power steering system has a yoke, n (incidentally, “n” is a common divisor of the number of the magnetic poles and the number of the slots and equal to or more than 2) of the coil portions are parallel-connected between the segments. Moreover, the coil portions are disposed in such a manner as to be symmetrical with respect to a mechanical angle of 360 degrees. Lead parts of the coil portions other than one of the coil portions, which is nearest in a circumferential direction to each of the segments, are drawn therefrom in the same circumferential direction.Type: ApplicationFiled: August 17, 2001Publication date: June 27, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Akihiro Daikoku, Kyouhei Yamamoto, Kei Yonemori
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Patent number: 6388354Abstract: A motor for an electric power steering assembly includes a yoke, a multi-polar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator including a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: GrantFiled: May 18, 1999Date of Patent: May 14, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Patent number: 6388355Abstract: A motor for an electric power steering assembly includes a yoke, a multipolar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: GrantFiled: July 2, 2001Date of Patent: May 14, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Publication number: 20020047452Abstract: An armature comprises: a shaft; a core secured to the shaft having a plurality of slots extending in the axial direction formed on the outer circumferential surface thereof; a coil composed of a plurality of coil portions formed by winding wires a plurality of turns around a pair of slots separated by a predetermined number of slots and offsetting each of the coil portions one slot at a time in the circumferential direction of the core; and a commutator secured to the shaft having a plurality of segments; adjacent coil portions sharing a slot along one side thereof, wherein segments which should have the same electric potential are electrically connected by means of equalizing connectors.Type: ApplicationFiled: November 14, 2001Publication date: April 25, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Mitsuyuki Tsumura
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Publication number: 20020008430Abstract: A motor for an electric power steering assembly comprises a yoke, a multi-polar magnetic field portion composed of at least four poles secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having a winding constructed by winding wiring into an even number of slots formed on the outer circumferential surface of a core so as to extend in the axial direction thereof, a commutator comprising a plurality of segments secured to an end portion of the shaft; and a plurality of brushes contacting the surface of the commutator.Type: ApplicationFiled: July 2, 2001Publication date: January 24, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Toshinori Tanaka, Ryuichi Ikeda, Shigekazu Sakabe, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa, Kyouhei Yamamoto
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Patent number: 6236137Abstract: A commutator motor comprises a yoke, a magnetic field portion secured to the inner wall of the yoke, a shaft disposed within the yoke so as to be able to rotate freely, an armature secured to the shaft having windings constructed by winding wire by a lap-winding method into slots formed on the outer circumferential surface of a core, a commutator including a resin portion and a plurality of segments held on an outer circumferential portion of the insulating resin portion with the spaces between adjacent segments being held by the insulating resin portion, a plurality of brushes contacting the surface of the commutator, and terminals electrically connecting segments which are to have the same electric potential.Type: GrantFiled: August 6, 1999Date of Patent: May 22, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Toshinori Tanaka, Kyouhei Yamamoto, Akihiro Daikoku, Akihiko Imagi, Yoshio Yoshikuwa