Patents by Inventor Yoshinobu Utsumi

Yoshinobu Utsumi 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).

  • Publication number: 20140091682
    Abstract: In a controller-integrated electric rotating machine configured to assemble a front side semi-manufactured assembly E formed from an electric rotating machine main body 1 and a front bracket 4 with the rear side semi-manufactured assembly D to which a rear bracket 5, a control unit assembly A, a power unit assembly B, and a brush unit assembly C are integrated, a series of brush restricting pin insertion holes 24 are disposed from a rear side end surface of the control unit assembly through the brush, and therefore assembling workability is improved without failures in assembling work which occur due to breaking away of a brush from a brush holder to the rotary shaft side.
    Type: Application
    Filed: August 8, 2011
    Publication date: April 3, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshinobu Utsumi, Masahiko Fujita
  • Publication number: 20140070643
    Abstract: A rotating electric machine including: a bracket holding a rotor and a stator of a motor; a heat sink provided fixedly to the bracket on an outside of the bracket; a resolver disposed between the heat sink and the motor; a stator circuit portion and a field circuit portion disposed to the heat sink on a side opposite to the resolver; and a control board supported on an insert case attached to the heat sink and electrically connected to the stator circuit portion and the field circuit portion. A resolver input-output terminal is electrically connected to the control board by passing through an insertion hole provided to the heat sink. The rotating electric machine configured in this manner is compact and inexpensive with an excellent heat-releasing performance and a capability of reducing man-hours required for assembly and components required for connection.
    Type: Application
    Filed: February 8, 2013
    Publication date: March 13, 2014
    Inventors: Naohiro MOTOISHI, Masahiko FUJITA, Yoshinobu UTSUMI
  • Publication number: 20130320786
    Abstract: A first cooling air passage is formed to let first cooling air generated by a cooling fan in from a radially outside of an inverter apparatus to cool a heat sink and out through exhaust holes provided on an outer peripheral side of a rear bracket by passing an inner periphery of the rear bracket. Also, a second cooling air passage is formed to let second cooling air generated by the cooling fan into a hollow portion of the inverter apparatus from an axially rear of a rotation shaft to cool a brush holder and a magnetic pole position detection sensor and out through the exhaust holes by passing the inner periphery of the rear bracket. Hence, cooling performance for the magnetic pole position detection sensor and the brush holder may be enhanced and an axial dimension may be reduced.
    Type: Application
    Filed: November 5, 2012
    Publication date: December 5, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hitoshi ISODA, Yoshinobu UTSUMI, Masahiko FUJITA
  • Patent number: 8004130
    Abstract: There is provided a rotating electric machine including a rotation sensor unit capable of demonstrating a shielding effect over a wide frequency bandwidth and a manufacturing method therefor. In the rotating electric machine, a power unit provided with a switching element that controls an electric current that flows in a stator winding and a magnetic-field current control circuit unit provided with a switching element that controls an electric current that flows in a rotor winding are arranged on a predetermined surface of one of a pair of brackets that pivotably support a rotor shaft, and the rotation sensor unit is disposed in the vicinity of the predetermined surface of the one bracket; The rotating electric machine is characterized in such a way that there is provided a ring-shaped member that is fixed on the outer surface of the rotation sensor unit, and the ring-shaped member is configured with a non-magnetic unit having an electric conductivity and a magnetic unit.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: August 23, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masao Kikuchi, Yoshinobu Utsumi, Hitoshi Isoda, Yuji Shirakata, Masahiko Fujita
  • Patent number: 7999425
    Abstract: Assembly of a controller-integrated rotating electric machine is facilitated. In a controller-integrated rotating electric machine provided with a rotating electric machine unit having a rotor (2), a stator (3), and brackets (4, 5); a plurality of stator current switching circuit units (13) that are attached on an insulator cover (14) mounted on the brackets (4, 5); and a controller unit having a control circuit board (102), the stator current switching circuit unit (13) is provided with a plurality of switching elements (13a) and a plurality of switching elements (13b); a pair of heat sinks (13g, 13h) with which the drain terminals of the switching elements (13a, 13b) are connected; and a pair of electric connection members (17, 18) that pull out the terminals of the switching elements (13a, 13b) and that hold and integrate the pair of heat sinks (13g, 13h).
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: August 16, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshinobu Utsumi, Masahiko Fujita, Yoshiharu Hayashi
  • Patent number: 7952242
    Abstract: A rotary electric machine integrated with a control device includes stator current switching circuit sections, each of which has a switching element disposed on a heat sink; a field current switching circuit section; a control circuit section which controls the stator current switching circuit sections and the field current switching circuit section; and a case which contains the stator current switching circuit sections and has suction holes each for a cooling air inflow, the heat sinks of three phases for the stator current switching circuit sections being disposed in a circumferential direction of the rotary electric machine. In the rotary electric machine, of the suction holes of the case, an area of the suction hole for the heat sink of the phase disposed in the midst is set to be larger than an area of the suction hole of other phase.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: May 31, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshinobu Utsumi, Masahiko Fujita
  • Publication number: 20100102683
    Abstract: Assembly of a controller-integrated rotating electric machine is facilitated. In a controller-integrated rotating electric machine provided with a rotating electric machine unit having a rotor (2), a stator (3), and brackets (4, 5); a plurality of stator current switching circuit units (13) that are attached on an insulator cover (14) mounted on the brackets (4, 5); and a controller unit having a control circuit board (102), the stator current switching circuit unit (13) is provided with a plurality of switching elements (13a) and a plurality of switching elements (13b); a pair of heat sinks (13g, 13h) with which the drain terminals of the switching elements (13a, 13b) are connected; and a pair of electric connection members (17, 18) that pull out the terminals of the switching elements (13a, 13b) and that hold and integrate the pair of heat sinks (13g, 13h).
    Type: Application
    Filed: April 15, 2009
    Publication date: April 29, 2010
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshinobu Utsumi, Masahiko Fujita, Yoshiharu Hayashi
  • Publication number: 20100097053
    Abstract: There is provided a rotating electric machine including a rotation sensor unit capable of demonstrating a shielding effect over a wide frequency bandwidth and a manufacturing method therefor. In the rotating electric machine, a power unit provided with a switching element that controls an electric current that flows in a stator winding and a magnetic-field current control circuit unit provided with a switching element that controls an electric current that flows in a rotor winding are arranged on a predetermined surface of one of a pair of brackets that pivotably support a rotor shaft, and the rotation sensor unit is disposed in the vicinity of the predetermined surface of the one bracket; The rotating electric machine is characterized in such a way that there is provided a ring-shaped member that is fixed on the outer surface of the rotation sensor unit, and the ring-shaped member is configured with a non-magnetic unit having an electric conductivity and a magnetic unit.
    Type: Application
    Filed: January 21, 2009
    Publication date: April 22, 2010
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masao KIKUCHI, Yoshinobu UTSUMI, Hitoshi ISODA, Yuji SHIRAKATA, Masahiko FUJITA
  • Publication number: 20090284106
    Abstract: A rotary electric machine integrated with a control device includes stator current switching circuit sections, each of which has a switching element disposed on a heat sink; a field current switching circuit section; a control circuit section which controls the stator current switching circuit sections and the field current switching circuit section; and a case which contains the stator current switching circuit sections and has suction holes each for a cooling air inflow, the heat sinks of three phases for the stator current switching circuit sections being disposed in a circumferential direction of the rotary electric machine. In the rotary electric machine, of the suction holes of the case, an area of the suction hole for the heat sink of the phase disposed in the midst is set to be larger than an area of the suction hole of other phase.
    Type: Application
    Filed: October 24, 2008
    Publication date: November 19, 2009
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshinobu Utsumi, Masahiko Fujita
  • Publication number: 20080284288
    Abstract: An electric rotating machine for a vehicle capable of reducing influence of leakage flux on a turning angle detector as much as possible and detecting a turning angle more accurately is provided. The electric rotating machine for a vehicle includes: a rotor core 12 that is fitted to a rotary shaft 7; a stator core 24 that is concentric with the rotor core 12 and disposed on the outside of the rotor core 12; and a resolver 31 acting as a turning angle detector that is disposed on one shaft end of the rotary shaft 7; in which the rotary shaft 7 itself is constituted to be magnetic flux interrupting means made of a non-magnetic material.
    Type: Application
    Filed: May 8, 2008
    Publication date: November 20, 2008
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yoshinobu Utsumi, Hideki Morikaku, Yoshihito Asao
  • Patent number: 7417350
    Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: August 26, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Yoshihito Asao
  • Patent number: 7400076
    Abstract: The rotating electric machine has a stator coil wound around a stator, a magnetic pole and a signal rotor fixed to a rotor, and a detection stator, disposed opposite to the signal rotor, for detecting the rotational position of the rotor, characterized by further comprising an adjuster for adjusting the position of the signal rotor or the detection stator by supplying a direct current to a predetermined phase of the stator coil and then a direct current to a different phase from the predetermined phase to rotate the rotor by a predetermined angle or more and constrain the rotor.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: July 15, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Shinji Nishimura, Yoshihito Asao
  • Patent number: 7388346
    Abstract: To obtain an adjustment method of rotor position detection of a synchronous motor with excellent productivity. An adjustment method of rotor position detection of a synchronous motor, wherein a synchronous motor having a stator wound around a stator coil and a rotor provided with magnetic poles, and a rotational position detector having a sensor rotor fixed to the rotor and a sensor stator disposed opposite to the sensor rotor for detecting a rotational position of the rotor are provided, and wherein an amount of deviation between the rotational position of the synchronous motor determined from an output of the rotational position detector and an actual rotational position of the synchronous motor is adjusted, the method comprising: a step of detecting the amount of deviation during rotation of the synchronous motor; and a step of mechanically adjusting a relative position between the rotational position detector and the synchronous motor based on a detected value of the amount of deviation, is provided.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: June 17, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinji Nishimura, Yoshinobu Utsumi, Yoshihito Asao
  • Patent number: 7378767
    Abstract: An AC dynamo electric machine for a motor vehicle includes an AC dynamo machine body 100 composed of a rotor 10 constituted by a first rotatable shaft 12 supported rotatably by a pair of bearings 16, 17, a rotor core 8 fixedly secured to the first rotatable shaft 12 and a field winding 9 wound on the rotor core 8, a stator 3 composed of a stator core 1 disposed in opposition to the rotor 10 and a polyphase stator winding 2 wound on the stator core 1 and a bracket 80 supporting the pair of bearings 16, 17 and the stator 3, and a rotational position detector for the control purpose composed of a second rotatable shaft 30 coupled to the first rotatable shaft 12 through a large magnetic reluctance portion 32, 33, a second rotor 21 fixedly secured to the second rotatable shaft 30 and a second stator winding 22a for generating an output voltage based on rotation of the second rotor 21.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: May 27, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiko Kusumoto, Yoshinobu Utsumi
  • Patent number: 7368841
    Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: May 6, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Yoshihito Asao
  • Patent number: 7345394
    Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: March 18, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Yoshihito Asao
  • Patent number: 7339294
    Abstract: A vehicular starting and charging rotary electric machine includes a rotor, a stator, brackets, a brush, and a rotation detection sensor. The rotor has a field winding. The stator has a stator winding. The brackets supports the rotor and the stator. One end of the brush is brought into contact with the rotor to supply field current to the field winding of the rotor. The rotation detecting sensor is arranged coaxially with a rotating shaft of the rotor, for detecting a state of the rotor and functioning as a motor or a generator. The magnetic pole position detecting sensor is integrally fixed to the bracket.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: March 4, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Atsushi Oohashi, Katsuhiko Kusumoto, Hideki Morikaku, Yoshinobu Utsumi
  • Patent number: 7309936
    Abstract: To obtain a resolver in which the winding portion is prevented from breaking by corrosion caused by water.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: December 18, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Shinji Nishimura
  • Patent number: 7259489
    Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: August 21, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Utsumi, Yoshihito Asao
  • Publication number: 20070188044
    Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.
    Type: Application
    Filed: April 18, 2007
    Publication date: August 16, 2007
    Inventors: Yoshinobu Utsumi, Yoshihito Asao