Patents by Inventor Shuji Isono

Shuji Isono 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).

  • Patent number: 7442013
    Abstract: An electro-hydraulic power steering apparatus in which a control device, a motor and a pump are integrated. The apparatus includes a first housing, a second housing, a control device surrounded by the first and second housings, a motor disposed on a side of the first housing and a pump disposed on a side of the second housing. The motor includes a rotor, a stator and a frame. The rotor has a first bearing supported by the first housing. The frame includes an inner circumferential face into which a stator core is press fitted and receives a second bearing of the rotor. The frame is secured to the first housing by a first clamp screw. The first housing and the second housing are secured by a second clamp screw. The first and second clamp screws are tightened from the hand of the frame.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: October 28, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshinori Tanaka, Kiyohide Okamoto, Yuusuke Matsui, Kyouhei Yamamoto, Shuji Isono, Hideki Megata, Keiichi Fukazawa, Katsumi Ohata, Kengo Fujimoto
  • Patent number: 7427858
    Abstract: A resolver reference position adjustment method is capable of minimizing a detection error in the rotation angle of a rotor of a motor. In the resolver reference position adjustment method in which a reference position of a resolver of an axial double angle n mounted on an end of a shaft, to which the rotor of the motor is fixedly attached, for detecting rotation angles of the rotor is adjusted with respect to the rotor, the reference position of the resolver is adjusted by using the rotation angles of the rotor at a first point and at a second point, respectively, which are positions of the rotor apart an angle of (mechanical angle 180/axial double angle n) degrees from each other.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: September 23, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Satoru Akutsu, Shinsuke Hemmi, Shuji Isono, Seiki Kodama
  • Publication number: 20070074586
    Abstract: A resolver reference position adjustment method is capable of minimizing a detection error in the rotation angle of a rotor of a motor. In the resolver reference position adjustment method in which a reference position of a resolver of an axial double angle n mounted on an end of a shaft, to which the rotor of the motor is fixedly attached, for detecting rotation angles of the rotor is adjusted with respect to the rotor, the reference position of the resolver is adjusted by using the rotation angles of the rotor at a first point and at a second point, respectively, which are positions of the rotor apart an angle of (mechanical angle 180/axial double angle n) degrees from each other.
    Type: Application
    Filed: February 3, 2006
    Publication date: April 5, 2007
    Inventors: Satoru Akutsu, Shinsuke Hemmi, Shuji Isono, Seiki Kodama
  • Patent number: 7183952
    Abstract: A resolver can make accurate angle detection in an entire detection range. The resolver includes a resolver stator having an excitation winding of one phase adapted to be excited by a power supply and a first and a second output winding of two phases for outputting a change in the density of magnetic flux as a voltage, a resolver rotor arranged at a central portion of the resolver stator so as to cooperate with the resolver stator for changing a gap permeance between the resolver rotor and the resolver stator in accordance with the rotation of the resolver rotor, and a detection error correction part that corrects an angle detection error of the resolver by using the value of a Lissajous radius of a circular Lissajous waveform obtained from the amplitudes of an output signal Scos from the first output winding and an output signal Ssin from the second output winding.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: February 27, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Satoru Akutsu, Shinsuke Hemmi, Shuji Isono, Seiki Kodama
  • Publication number: 20040202555
    Abstract: An electro-hydraulic power steering apparatus in which a control device, a motor and a pump are integrated. The apparatus includes a first housing, a second housing, a control device surrounded by the first and second housings, a motor disposed on a side of the first housing and a pump disposed on a side of the second housing. The motor includes a rotor, a stator and a frame. The rotor has a first bearing supported by the first housing. The frame includes an inner circumferential face into which a stator core is press fitted and receives a second bearing of the rotor. The frame is secured to the first housing by a first clamp screw. The first housing and the second housing are secured by a second clamp screw. The first and second clamp screws are tightened from the hand of the frame.
    Type: Application
    Filed: March 2, 2004
    Publication date: October 14, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Toshinori Tanaka, Kiyohide Okamoto, Yuusuke Matsui, Kyouhei Yamamoto, Shuji Isono, Hideki Megata, Keiichi Fukazawa, Katsumi Ohata, Kengo Fujimoto
  • Patent number: 6075305
    Abstract: A dynamo-electric machine satisfies an expressionR.sub.eq .gtoreq.(.rho..sub.0 .multidot.(r1*.tau.)/(S/3))*(2.5)where .rho..sub.0 (.OMEGA..multidot.m) is the resistivity of armature coil, S (m.sup.2) is the cross-sectional area of the conductor portions thereof, r1 (m) is radius of rotation of the connecting portions between equalizers and armature circuits, namely the armature coil, risers, or commutator segments, .tau. (rad) is the pitch of pole pairs, and R.sub.eq (.OMEGA.) is the resistance value of the equalizer.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: June 13, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akihiro Daikoku, Toshinori Tanaka, Kiyohide Okamoto, Shuji Isono, Akihiko Imagi, Yoshio Yoshikuwa, Masafumi Okazaki, Kyouhei Yamamoto