Patents by Inventor Yoshihito Asao

Yoshihito Asao 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).

  • Stator and resolving method and device thereof
    Patent number: 7340821
    Abstract: The method for resolving the stator having a coil disposed in the slots provided around an inner circumferential face of a cylindrical iron core and having an opening portion includes a step of enlarging the opening portion of the slot, and a step of extracting the coil from the slot.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: March 11, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Kyouhei Yamamoto
  • Stator and resolving method and device thereof
    Patent number: 7342343
    Abstract: The method for resolving the stator having a coil disposed in the slots provided around an inner circumferential face of a cylindrical iron core and having an opening portion includes a step of enlarging the opening portion of the slot, and a step of extracting the coil from the slot.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: March 11, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Kyouhei Yamamoto
  • MOTOR CONTROLLER
    Publication number: 20070290647
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Application
    Filed: August 8, 2007
    Publication date: December 20, 2007
    Inventors: Takahiro URAKABE, Tsunenobu Yamamoto, Yoshihito Asao
  • Motor controller
    Patent number: 7294984
    Abstract: A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 13, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takahiro Urakabe, Tsunenobu Yamamoto, Yoshihito Asao
  • Electric Rotating Machine
    Publication number: 20070257568
    Abstract: The invention provides an electric rotating machine comprising: an electric rotating machine section provided with a rotor including a rotary shaft and a stator including an armature winding that is disposed so as to surround the rotor; and a switching circuit section that is located in the proximity of the electric rotating machine section, and is provided with at least one pair of switching elements forming an upper arm and a lower arm to make a switching control of the electric rotating machine section; and in which the switching elements of each arm of the switching circuit section are connected at respective drain terminals to individual heat sinks with no insulator interposed, and the individual heat sinks are made integral with each other via an insulator.
    Type: Application
    Filed: January 26, 2006
    Publication date: November 8, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Akita, Masaki Kato, Yoshihito Asao
  • Electric rotating machine for vehicle
    Patent number: 7291950
    Abstract: Reductions in cost and manufacturing processes are achieved by interposing a single metallic terminal between a lead wire of a stator and a three-phase output terminal. A rotor 3 is fixed onto a rotating shaft 2 disposed rotatably in a housing 1, and a stator core 5 is disposed opposite to the rotor 3. A stator winding 6 is wound around the stator core 5 and a lead wire 10 of the stator winding 6 is connected to a head portion 8a of a three-phase output terminal 8 through a single metallic terminal by a screw 12.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: November 6, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hitoshi Isoda, Yoshihito Asao
  • Rotary electric machine
    Patent number: 7288866
    Abstract: An output terminal mount includes a molded resin body in which a harness connecting portion and a mounting portion are formed integrally; internal terminals insert molded into the molded resin body such that connecting terminals at a first end are exposed inside harness slots and three-phase output wires are each connected at a second end; and three-phase output bolts insert molded into the molded resin body so as to project into each of the harness slots, nuts being fastened to the projecting portions such that the connecting terminals and terminals of a three-phase output wiring harness are placed in pressure contact with each other. The output terminal mount is mounted by fixing the mount portion to an end surface of a rear bracket at a position between an outer periphery of a crown portion and a radially outer peripheral surface of the rear bracket.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: October 30, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaru Kuribayashi, Yoshihito Asao
  • Control apparatus-integrated generator-motor
    Publication number: 20070240662
    Abstract: The control apparatus-integrated generator-motor has: a generator-motor; and a control apparatus that is constituted by an inverter, a control circuit, a temperature sensor, etc. The control circuit determines whether or not switching element temperature will exceed the maximum permissible temperature when a command for an automatic engine stopping operation is issued. Then, if it is determined that the maximum permissible temperature will be exceeded, generated output of the generator-motor is reduced immediately before the automatic engine stopping operation in such a way that the switching element temperature will not exceed the maximum permissible temperature. The engine is subsequently stopped automatically.
    Type: Application
    Filed: April 10, 2007
    Publication date: October 18, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yutaka Kitamura, Yoshihito Asao
  • Automotive alternator and automotive alternator brush abrasion detection system
    Patent number: 7274127
    Abstract: A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder portion and are placed in elastic contact with slip rings by springs. An abrasion detection terminal is insert molded into the brush holder portion, a contact thereof projecting inside one of the brush insertion apertures and coming into contact with the corresponding spring when the brushes are abraded by a predetermined amount.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: September 25, 2007
    Assignee: Mitsubishi Deni Kabushiki Kaisha
    Inventors: Toshiaki Kashihara, Katsuhiro Sasaki, Yoshihito Asao, Katsumi Adachi
  • Control device for motor generator
    Patent number: 7268441
    Abstract: In the control device for motor generator in which an engine is started and power generation is performed while a vehicle is running, a field current limit value Ifm in electric driving to start the engine is larger than a field current limit value Ifg in power generation. In the power generation, an inverter mode in a low rotation speed zone for boosting and an alternator mode in a high rotation speed zone for rectifying and outputting a generated voltage without boosting are provided. A field current limit value Ifgi in the inverter-mode power generation and a field current limit value Ifga in the alternator-mode power generation are set differently from each other, and the larger value is set as the value Ifg.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: September 11, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Shinji Nishimura
  • Motor/generator unit
    Patent number: 7268513
    Abstract: A motor/generator unit in which a motor/generator and an invertor part are integrated and the wiring of a field circuit part for supplying current to a winding on a rotor is rationalized. In a motor/generator unit in which a motor/generator body part having a field winding supplied with electricity via brushes and current-controlled by a semiconductor control device controlled by a control circuit part and an invertor power circuit part controlled by the control circuit part has the invertor power circuit part and the control circuit part mounted thereto, the brushes are disposed between the field winding and the armature winding on one side and the control circuit part on the other and the semiconductor control device is mounted on a control circuit mounting part on which the control circuit part is mounted.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: September 11, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hitoshi Isoda, Yoshihito Asao, Masaki Kato, Hiroyuki Akita
  • Dynamoelectric claw-shaped rotor with magnet retainer
    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
  • DYNAMOELECTRIC ROTOR
    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
  • DYNAMOELECTRIC ROTOR
    Publication number: 20070188043
    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
  • Control device integrated dynamo-electric machine
    Publication number: 20070188119
    Abstract: In order to improve reliability, cost performance, and cooling property, a control device integrated dynamo-electric machine mounted to a dynamo-electric machine includes an inverter bridge configured with a plurality of semiconductor switching elements, and a plurality of heat sinks provided for respective arms of the inverter bridge and having the semiconductor switching elements of the corresponding arms mounted thereon for cooling the mounted semiconductor switching elements, wherein the semiconductor switching element includes a plurality of semiconductor switching devices arranged in parallel, and the plurality of semiconductor switching devices arranged in parallel are mounted on the common heat sinks.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 16, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Isao Sonoda, Yoshihito Asao
  • DYNAMOELECRTRIC ROTOR
    Publication number: 20070182275
    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 9, 2007
    Inventors: Yoshinobu Utsumi, Yoshihito Asao
  • Vehicular generator-motor control apparatus
    Publication number: 20070182349
    Abstract: A vehicular generator-motor control apparatus wherein a winding field type salient-pole generator-motor 1 (in FIG. 1) for a vehicle is subjected to a conduction control by a DC-AC converter 2, characterized in that a stator 1A of the vehicular winding field type salient-pole generator-motor 1 is energized by rectangular wave voltages at those conduction start angles ? of respective phases of the stator 1A which are shifted a predetermined angle relative to a rotor position, and that the conduction start angles ? of the respective phases change substantially continuously in accordance with an input voltage of the DC-AC converter 2 and a revolution speed of the generator-motor 2.
    Type: Application
    Filed: January 10, 2007
    Publication date: August 9, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masahiko Fujita, Yoshihito Asao
  • Stator of rotating electric machine and manufacturing method of the stator
    Patent number: 7239059
    Abstract: A plurality of coils concentratedly wound around individual teeth are formed as coil units having a common shape, each of the coil units being made by winding a conductor in a generally rectangular form, stacking one conductor line on top of another, and each of the coil units having two parallel straight portions inserted into the slots on both sides of each tooth. The two parallel straight portions of the conductor of each coil unit are fitted in two adjacent slots in such a way that one straight portion of the conductor is laid in an inner layer in one of the two adjacent slots and the other straight portion of the conductor is laid in an outer layer in the other of the two adjacent slots.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: July 3, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naohide Maeda, Yoshihito Asao
  • Rotating electric machine and manufacturing method thereof
    Publication number: 20070139858
    Abstract: A control device of a rotating electric machine to which an inverter is integrally assembled is downsized, and manufacturing costs are reduced. An inverter for controlling outputs from the rotating electric machine is integrated with a rotating electric machine, and in which a control device forming an inverter is constructed of a switching element and a heat sink, a drain electrode terminal of the switching element is directly joined to the heat sink, and a source electrode terminal and gate electrode terminal of the switching element are joined to a metal pattern formed at a connection member.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 21, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroyuki Yoshihara, Masao Kikuchi, Masaki Kato, Yoshihito Asao
  • Vehicular generator-motor system
    Patent number: 7230399
    Abstract: A vehicular generator-motor 1 is composed of a rotor, a stator having three phase armature winding 2, and a converter 4. The rotor is provided with a field winding 3 for magnetizing a plurality of magnetic pole pieces 14a, 15a, and permanent magnets 17 for magnetizing the magnetic pole pieces 14a, 15a together with the field winding 3. When the generator-motor 1 is operated as a motor, the converter 4 is operated as an inverter to restrain the armature current at the time of low speed rotation to the extent of the additional magnetic flux from the permanent magnets.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: June 12, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaru Kuribayashi, Yoshihito Asao