Patents by Inventor Mitsuharu Hashiba

Mitsuharu Hashiba 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: 9160272
    Abstract: A control device for a permanent magnet motor, including: a rotor position detector configured to detect a rotating speed of a rotor of a permanent magnet motor in a state in which the permanent magnet motor is disconnected from a load by a clutch and rotates without power supply; a magnet temperature estimator configured to estimate a magnet temperature of the permanent magnet motor based on the detected rotating speed; a current compensator configured to determine a compensation amount for compensating for a current command to the permanent magnet motor based on the estimated magnet temperature; and a drive control device configured to control a power converter for driving the permanent magnet motor based on the compensation amount.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: October 13, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomoya Tachibana, Takeshi Mori, Mitsuharu Hashiba, Masaya Inoue, Moriyuki Hazeyama
  • Publication number: 20140354204
    Abstract: A control device for a permanent magnet motor, including: a rotor position detector configured to detect a rotating speed of a rotor of a permanent magnet motor in a state in which the permanent magnet motor is disconnected from a load by a clutch and rotates without power supply; a magnet temperature estimator configured to estimate a magnet temperature of the permanent magnet motor based on the detected rotating speed; a current compensator configured to determine a compensation amount for compensating for a current command to the permanent magnet motor based on the estimated magnet temperature; and a drive control device configured to control a power converter for driving the permanent magnet motor based on the compensation amount.
    Type: Application
    Filed: January 18, 2013
    Publication date: December 4, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomoya Tachibana, Takeshi Mori, Mitsuharu Hashiba, Masaya Inoue, Moriyuki Hazeyama
  • Patent number: 8354763
    Abstract: In a flywheel-type magnet generator, a heat dissipation member which has no relation with a magnetic circuit is fitted into a space formed by cutting a bulk of a laminated core used for configuring the magnetic circuit, a cooling tube installed to be inserted into or penetrate the heat dissipation member is provided, and by supplying a cooling medium to the cooling tube, cooling performance of the stator is enhanced.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: January 15, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Mitsuharu Hashiba
  • Publication number: 20110241459
    Abstract: In a flywheel-type magnet generator, a heat dissipation member which has no relation with a magnetic circuit is fitted into a space formed by cutting a bulk of a laminating core used for configuring the magnetic circuit, a cooling tube installed to be inserted into or penetrate the heat dissipation member is provided, and by supplying a cooling medium to the cooling tube, cooling performance of the stator is enhanced.
    Type: Application
    Filed: August 11, 2010
    Publication date: October 6, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Mitsuharu HASHIBA
  • Patent number: 7902702
    Abstract: In a magneto generator, second phase lead wires (10a, 10b) and third phase lead wires (11a, 11b) among individual one pair of first, second and third lead wires (9a, 9b; 10a, 10b; 11a, 11b) are covered with first protective tubes (12a, 12b), respectively. The second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) covered with the first protective tubes (12a, 12b) are bent toward the first phase lead wires (9a, 9b) in a circumferential direction and bundled together with the first phase lead wires (9a, 9b). The first phase lead wires (9a, 9b), the second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) thus bundled are bent in a direction opposite to the circumferential direction and covered with second protective tubes (22a, 22b, 22c), respectively.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 8, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventor: Mitsuharu Hashiba
  • Patent number: 7714468
    Abstract: In order to achieve the above object, according to one aspect of the present invention, there is provided a magnetoelectric generator including: a flywheel rotating around an axis of rotation; a plurality of magnets disposed on an inner peripheral surface of the flywheel and rotating together with the flywheel; a stator core disposed radially inside the magnets, the stator core being constituted by stacking a plurality of thin steel sheets and having: an annulus portion; and a plurality of teeth projecting radially outward from the annulus portion; and a generating coil configured by winding conducting wire onto the teeth, wherein: a coolant aperture through which a coolant passes is formed on the annulus portion so as to penetrate through the thin steel sheets in a direction of lamination.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: May 11, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuharu Hashiba, Akifumi Miyake
  • Patent number: 7696658
    Abstract: A magnet generator including a bowl-shaped flywheel which is formed of a cylindrical portion and a bottom portion on one end side of the cylindrical portion, a plurality of magnets which are arranged on the inner peripheral surface of the cylindrical portion of the flywheel, and a power generation coil which generates power under an electromagnetic induction action with the magnets and which is disposed in opposition to the magnets within the flywheel, wherein the flywheel has a plurality of vent holes in its bottom portion, and the hole base part of each of the vent holes is formed in a droop or curved shape. Owing to the droop or curved shape, a cooling efficiency is enhanced, and a job for treating burrs and laps after cutting working can be relieved to enhance a productivity.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: April 13, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventor: Mitsuharu Hashiba
  • Patent number: 7615899
    Abstract: In a magneto generator, second phase lead wires (10a, 10b) and third phase lead wires (11a, 11b) among individual one pair of first, second and third lead wires (9a, 9b; 10a, 10b; 11a, 11b) are covered with first protective tubes (12a, 12b), respectively. The second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) covered with the first protective tubes (12a, 12b) are bent toward the first phase lead wires (9a, 9b) in a circumferential direction and bundled together with the first phase lead wires (9a, 9b). The first phase lead wires (9a, 9b), the second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) thus bundled are bent in a direction opposite to the circumferential direction and covered with second protective tubes (22a, 22b, 22c), respectively.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: November 10, 2009
    Assignee: Mitsubishi Electric Corporation
    Inventor: Mitsuharu Hashiba
  • Publication number: 20090230794
    Abstract: In a magneto generator, second phase lead wires (10a, 10b) and third phase lead wires (11a, 11b) among individual one pair of first, second and third lead wires (9a, 9b; 10a, 10b; 11a, 11b) are covered with first protective tubes (12a, 12b), respectively. The second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) covered with the first protective tubes (12a, 12b) are bent toward the first phase lead wires (9a, 9b) in a circumferential direction and bundled together with the first phase lead wires (9a, 9b). The first phase lead wires (9a, 9b), the second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) thus bundled are bent in a direction opposite to the circumferential direction and covered with second protective tubes (22a, 22b, 22c), respectively.
    Type: Application
    Filed: May 28, 2009
    Publication date: September 17, 2009
    Inventor: Mitsuharu HASHIBA
  • Patent number: 7531931
    Abstract: A permanent-magnet generator is provided that has a bowl-shaped fly wheel integrally formed with a boss part by casting or hot forging, that reduces rotational imbalance and the quantity of balance correction processing such as drilling. The permanent-magnet generator has a bowl-shaped fly wheel produced by casting or hot forging, having a circumferential wall part and a bottom wall part, and having a boss part for supporting a rotating shaft, the boss part being integrally formed at the center of the bottom wall part. The plural vents are arranged substantially circularly in the bottom wall part of the fly wheel, and a key groove for coupling with the rotating shaft is provided at a part of the boss part. The arrangement of at least one of the plural vents is made unequal in order to reduce rotational imbalance including that caused by the key groove.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: May 12, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsuharu Hashiba, Nobuhiro Kihara
  • Patent number: 7508106
    Abstract: In a magnetoelectric generator generating electric power by electromagnetic induction between permanent magnets and a generating coil due to rotation of a flywheel, a plurality of press-worked portions for forcibly increasing roundness of the flywheel are formed by press working on a bottom portion of the flywheel.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: March 24, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Mitsuharu Hashiba
  • Publication number: 20080143204
    Abstract: A magnet generator including a bowl-shaped flywheel which is formed of a cylindrical portion and a bottom portion on one end side of the cylindrical portion, a plurality of magnets which are arranged on the inner peripheral surface of the cylindrical portion of the flywheel, and a power generation coil which generates power under an electromagnetic induction action with the magnets and which is disposed in opposition to the magnets within the flywheel, wherein the flywheel has a plurality of vent holes in its bottom portion, and the hole base part of each of the vent holes is formed in a droop shape. Owing to the droop shape, a cooling efficiency is enhanced, and a job for treating burrs and laps after cutting working can be relieved to enhance a productivity.
    Type: Application
    Filed: June 14, 2007
    Publication date: June 19, 2008
    Applicant: Mitsubishi Electric Corporation
    Inventor: Mitsuharu HASHIBA
  • Patent number: 7368844
    Abstract: A stator core includes: a laminated body in which a plurality of intermediate plates that have dowels are laminated so as to be integrated by dowel crimping between layers; and a pair of end plates that are disposed so as to be positioned on opposite sides of two end surfaces of the laminated body, and a receiving aperture that extends parallel to an axis of rotation is formed on the laminated body, a bent portion is disposed on the end plates, and the end plates are joined to the laminated body by engaging the bent portion in the receiving aperture.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: May 6, 2008
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsuharu Hashiba, Akifumi Miyake
  • Publication number: 20080036325
    Abstract: A stator of a magneto generator serves to make parts control easy and reduce the production cost. The stator includes a plurality of teeth each having a straight portion extending in a radially outer direction and a flange portion protruding in a circumferential direction from a tip end of the straight portion, and a magneto coil having a conductor wound around each of the teeth. The stator core includes a laminated iron core composed of a plurality of intermediate plates laminated one over another, and end plates arranged in intimate contact with opposite side surfaces of the laminated iron core. The intermediate plates and the end plates are formed of the same plate materials each having a flange segment. The end plates have a bent portion formed by bending the flange segment and serves to prevent the magneto coils from collapsing in the radially outer direction.
    Type: Application
    Filed: February 15, 2007
    Publication date: February 14, 2008
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Mitsuharu Hashiba, Akifumi Miyake
  • Patent number: 7262534
    Abstract: Two end plates of a stator core are made of a metal material to increase their rigidity and thereby hold, in a prescribed shape, generation coils that are wound on teeth of the stator core. To increase the insulation between the generation coils and the teeth, the circumferential width of a first portion, extending in the radial direction, of each of the end plates is made smaller than that of a corresponding first portion of a laminated core. At least a second portion of at least one of the two end plates is made of a non-magnetic metal material, whereby the magnetic loss is reduced and the temperature characteristic and the power generation characteristic are improved.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: August 28, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinji Baba, Mitsuharu Hashiba, Nobuhiro Kihara
  • Publication number: 20070182268
    Abstract: A stator core includes: a laminated body in which a plurality of intermediate plates that have dowels are laminated so as to be integrated by dowel crimping between layers; and a pair of end plates that are disposed so as to be positioned on opposite sides of two end surfaces of the laminated body, and a receiving aperture that extends parallel to an axis of rotation is formed on the laminated body, a bent portion is disposed on the end plates, and the end plates are joined to the laminated body by engaging the bent portion in the receiving aperture.
    Type: Application
    Filed: July 5, 2006
    Publication date: August 9, 2007
    Inventors: Mitsuharu Hashiba, Akifumi Miyake
  • Publication number: 20070132325
    Abstract: In a magneto generator, second phase lead wires (10a, 10b) and third phase lead wires (11a, 11b) among individual one pair of first, second and third lead wires (9a, 9b; 10a, 10b; 11a, 11b) are covered with first protective tubes (12a, 12b), respectively. The second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) covered with the first protective tubes (12a, 12b) are bent toward the first phase lead wires (9a, 9b) in a circumferential direction and bundled together with the first phase lead wires (9a, 9b). The first phase lead wires (9a, 9b), the second phase lead wires (10a, 10b) and the third phase lead wires (11a, 11b) thus bundled are bent in a direction opposite to the circumferential direction and covered with second protective tubes (22a, 22b, 22c), respectively.
    Type: Application
    Filed: September 12, 2006
    Publication date: June 14, 2007
    Inventor: Mitsuharu Hashiba
  • Publication number: 20070108851
    Abstract: A permanent-magnet generator is provided that has a bowl-shaped fly wheel integrally formed with a boss part by casting or hot forging, and that enables improvement in the quantity of rotation imbalance and significant reduction in the quantity of balance correction processing (drilling), which is necessary in a later process. The permanent-magnet generator has a bowl-shaped fly wheel produced by casting or hot forging, having a circumferential wall part and a bottom wall part, and having a boss part for supporting a rotating shaft, the boss part being integrally formed at the center of the bottom wall part. The plural vents are arranged substantially circularly with spacing from each other in the bottom wall part of the fly wheel, and a key groove for coupling with the rotating shaft is provided at a part of the boss part. The arrangement of at least one of the plural vents is made unequal in order to reduce the quantity of rotation imbalance including that of the key groove.
    Type: Application
    Filed: March 14, 2006
    Publication date: May 17, 2007
    Inventors: Mitsuharu Hashiba, Nobuhiro Kihara
  • Publication number: 20070096576
    Abstract: In a magnetoelectric generator generating electric power by electromagnetic induction between permanent magnets and a generating coil due to rotation of a flywheel, a plurality of press-worked portions for forcibly increasing roundness of the flywheel are formed by press working on a bottom portion of the flywheel.
    Type: Application
    Filed: January 13, 2006
    Publication date: May 3, 2007
    Inventor: Mitsuharu Hashiba
  • Publication number: 20070057582
    Abstract: In order to achieve the above object, according to one aspect of the present invention, there is provided a magnetoelectric generator including: a flywheel rotating around an axis of rotation; a plurality of magnets disposed on an inner peripheral surface of the flywheel and rotating together with the flywheel; a stator core disposed radially inside the magnets, the stator core being constituted by stacking a plurality of thin steel sheets and having: an annulus portion; and a plurality of teeth projecting radially outward from the annulus portion; and a generating coil configured by winding conducting wire onto the teeth, wherein: a coolant aperture through which a coolant passes is formed on the annulus portion so as to penetrate through the thin steel sheets in a direction of lamination.
    Type: Application
    Filed: December 20, 2005
    Publication date: March 15, 2007
    Inventors: Mitsuharu Hashiba, Akifumi Miyake