Patents by Inventor Shin Kusase

Shin Kusase 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).

  • High electrical and mechanical response structure of motor-generator
    Publication number: 20030102756
    Abstract: An AC motor-generator includes a rotor made up of a first inductor core and a second inductor core arrayed in an axial direction of a rotary shaft. A plurality of permanent magnets are arrayed at an interval of 2&pgr; in electrical angle of an armature away from each other in the periphery of each of the first and second inductor cores. Each permanent magnet is magnetized in a radius direction of the first and second inductor cores so as to be opposed to a magnetomotive force produced by a field winding, thereby resulting in quick disappearance of the magnetic flux of the field upon disappearance of the magnetomotive force from the field winding.
    Type: Application
    Filed: October 15, 2002
    Publication date: June 5, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • Flat rotary electric machine
    Publication number: 20030102764
    Abstract: A flat rotary electric machine to be mounted in a vehicle engine includes an annular stator core with a plurality of teeth and an armature winding and a field unit including a gutter-like field core having a pair of coaxial cylindrical core members. A plurality of permanent magnets are disposed on the cylindrical core members and an annular field coil disposed between the cylindrical core members. Each of the cylindrical core members has a plurality of magnet-conductive salient magnetic poles disposed between the permanent magnets, the permanent magnets are magnetized so that all the magnetic flux thereof can cross the stator through the teeth in the same direction.
    Type: Application
    Filed: November 18, 2002
    Publication date: June 5, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • Automotive alternator having detector for detecting initiation of rotation
    Patent number: 6566845
    Abstract: An alternator for use in an automotive vehicle includes a circuit for detecting initiation of rotation of an engine. Upon detecting the initiation of rotation, excitation current supply to a field winding is started, and thereafter an alternator output is controlled by controlling the excitation current. A resistor is connected to one phase winding of an armature to obtain a voltage indicating initiation of rotation during a period in which no excitation current is supplied to the field winding, and a capacitor is connected to another phase winding to raise the indicating voltage level. Since the indicating voltage induced by a small amount of residual magnetism is increased to a sufficient level by the capacitor, the initiation of rotation can be accurately detected.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: May 20, 2003
    Assignee: Denso Corporation
    Inventors: Makoto Taniguchi, Shin Kusase
  • Brushless rotating electric machine
    Publication number: 20030080643
    Abstract: A brushless rotating electric machine has an armature with a polyphase winding on an armature core, a field core wound with a field winding, a first exciting means which provides flux variation to the field core and a second exciting means which supplies direct current to the field winding by utilizing the flux variation provided as an exciting source to the field core by the first exciting means. The machine may also provide a structure so that the first exciting means is an excitation winding wound on the armature core to supply direct current, and the second exciting means has an induction winding provided on the field core and a rectifier connected to the induction winding. Additionally, the electric machine can be constructed so that the induction winding serves also as the field winding and short-circuits the field winding through the rectifier.
    Type: Application
    Filed: August 8, 2002
    Publication date: May 1, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • Rotary electric machine having annular rotor core with slits
    Publication number: 20030076004
    Abstract: In an alternating current generator, a rotor is provided radially inside a stator core. A rotor core has a cylindrical boss press-fit around a rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, and claw pieces in connecting with the disc portions radially outside the boss. A field winding is provided between the boss and claw pieces. An annular core is provided on an outer periphery of the claw pieces. The annular core is made of a stack of core sheets and has slits formed in the radial direction. Iron loss is decreased and leaks of magnetic fluxes in the annular core are suppressed by the slits.
    Type: Application
    Filed: October 17, 2002
    Publication date: April 24, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • Rotary electric machine having cylindrical rotor with alternating magnetic poles thereon
    Publication number: 20030076000
    Abstract: A rotary electric machine for a vehicle has a rotor with a rotor shaft, a pair of rotor cores, a field winding and an annular core made of a stack of core sheets. The rotor core has a boss, a disc portion and a cylindrical part. The cylindrical part is connected with the disc portion and is continuous along the rotor shaft. The cylindrical part is formed with projections and recesses which are disposed alternately in a circumferential direction on the outer periphery thereof. Permanent magnets may be disposed in the recesses. The annular core is connected with outer peripheries of the projections of the cylindrical parts. By adopting the cylindrical parts and the annular core, diameter of the boss is enlarged.
    Type: Application
    Filed: June 17, 2002
    Publication date: April 24, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • AC generator-motor apparatus for vehicle
    Publication number: 20030057782
    Abstract: An on-vehicle AC generator-motor apparatus is equipped with a rotor having field poles, an armature, and an AC-DC power converter. The armature is provided with an armature core disposed to face the rotor and three-phase windings wound in slots formed in the armature core. The AC-DC power converter is electrically connected to both of the three-phase windings and a battery of a vehicle. The AC generator-motor apparatus is operated as a motor in cases where an output voltage produced by making the rectifiers rectify an electromotive force generated by the multi-phase windings is higher than a terminal voltage of the battery. The number of slots is set to two per phase at the armature correspondingly to each pole of the field poles. Heat generation from the field poles can be reduced to prevent magnetomotive forces at the field poles from being weakened.
    Type: Application
    Filed: August 8, 2002
    Publication date: March 27, 2003
    Applicant: DENSO CORPORATION
    Inventor: Shin Kusase
  • Automotive alternator having detector for detecting initiation of rotation
    Publication number: 20030042809
    Abstract: An alternator for use in an automotive vehicle includes a circuit for detecting initiation of rotation of an engine. Upon detecting the initiation of rotation, excitation current supply to a field winding is started, and thereafter an alternator output is controlled by controlling the excitation current. A resistor is connected to one phase winding of an armature to obtain a voltage indicating initiation of rotation during a period in which no excitation current is supplied to the field winding, and a capacitor is connected to another phase winding to raise the indicating voltage level. Since the indicating voltage induced by a small amount of residual magnetism is increased to a sufficient level by the capacitor, the initiation of rotation can be accurately detected.
    Type: Application
    Filed: June 25, 2002
    Publication date: March 6, 2003
    Applicant: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Shin Kusase
  • Cooling arrangement of vehicle rotary electric machine
    Patent number: 6528910
    Abstract: A vehicle rotary electric machine includes a rotor having a plurality of claw-shaped pole pieces, a cooling fan, a stator core, a stator winding and a frame. A coil-end-gap is formed along the axial end of the stator core between outside portions of the stator winding extending from each pair of adjacent slots, and a cylindrical wall member is disposed between the frame and coil-ends of the stator winding.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: March 4, 2003
    Assignee: Denso Corporation
    Inventors: Shigenobu Nakamura, Shin Kusase
  • Vehicle AC generator
    Publication number: 20020163274
    Abstract: A rotor of a vehicle AC generator is comprised of a rotor core and a field coil. The rotor core is comprised of a boss portion and a plurality of claw-pole portions bending to respectively extend in axial directions from outer circumferences of the boss portion to interleave with each other to form a zigzag space between the claw-pole portions. The field coil comprises a main coil portion disposed on the boss portion, a sub-coil portion disposed between the main coil and the claw-pole portions and a flywheel diode connected in parallel with the main coil. When the field current is cut off, current circulating through the main coil is increased because the energy accumulated in the sub-coil is discharged.
    Type: Application
    Filed: April 16, 2002
    Publication date: November 7, 2002
    Applicant: DENSO CORPORATION
    Inventors: Shin Kusase, Tsutomu Shiga
  • Vehicle alternator having rectifier circuit using diode and FET
    Publication number: 20020163260
    Abstract: A vehicle alternator comprises a permanent magnet rotor, a stator having armature coils, and a rectifier circuit. In the rectifier circuit, Shottky barrier diodes and FETs are connected in series so that the forward directions of the Shottky barrier diodes and parasitic diodes of the MOSFETs are opposite. The Shottky barrier diodes are connected between the MOSFETs and the armature coils.
    Type: Application
    Filed: March 21, 2002
    Publication date: November 7, 2002
    Applicant: DENSO CORPORATION
    Inventors: Shin Kusase, Tsutomu Shiga
  • AC generator for vehicles
    Patent number: 6459186
    Abstract: An AC generator for a vehicle including a rotor with a fan, a stator disposed around the outer periphery of the rotor, and frame. The stator includes a laminated core having a plurality of slots, a plurality of electric conductors in the slots, and an insulator. There is a gap between the electric conductors and the insulator in a diametrical section of the slots, and an area ratio of the gap with respect to the sectional area of the slots is not more than 25%. A portion of the electric conductor positioned within the slot has a substantially rectangular shape along the shape of the slot.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: October 1, 2002
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase
  • Rotary electric machine
    Publication number: 20020117912
    Abstract: A rotary electric machine such as a vehicle AC generator includes a multi-phase armature winding, a stator core, a rotor including a magmoroc field coil and a plurality of poles, an unbalance detecting coil, and a comparator circuit for comparing an output signal of the unbalance detecting circuit with a threshold value. If the AC generator fails, a voltage induced in the unbalanced detecting coil becomes larger than the threshold value, and an alarm is be outputted.
    Type: Application
    Filed: February 22, 2002
    Publication date: August 29, 2002
    Applicant: Denso Corporation
    Inventors: Shin Kusase, Tsutomu Shiga
  • Stator of AC-generator and method of manufacturing the same
    Patent number: 6388358
    Abstract: A stator of a vehicle AC generator includes a stator core, a multi-phase stator winding formed from a plurality of conductor members. The stator winding has coil-ends at opposite sides of said stator core, and portions of the conductor members in each of the coil-ends are radially aligned to have fixed radial clearances therebetween for introducing cooling air and ensuring insulation of the conductor members.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: May 14, 2002
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase
  • Permanent magnet type AC generator having voltage regulating system
    Publication number: 20020047353
    Abstract: A vehicle AC generator for charging a battery includes a rotor having a permanent magnet, a stator having an armature winding, a rectifier and a short-circuit unit. The short-circuit unit intermittently short-circuits the armature winding. The armature winding is set to generates a no-load voltage that is lower than a terminal voltage of the battery when the armature winding is not connected to loads. The short-circuit unit intermittently short-circuits the armature winding to generates a fly back voltage that is higher than the terminal voltage of the battery when the armature winding is connected to the loads. Therefore, the output voltage of the permanent magnet type generator can be regulated without significant energy loss.
    Type: Application
    Filed: September 13, 2001
    Publication date: April 25, 2002
    Inventor: Shin Kusase
  • Stator of vehicle AC generator and method of manufacturing the same
    Patent number: 6335583
    Abstract: A stator of an ac generator for vehicle has a stator core which is a lamination of steel sheets and has a plurality of slots cut out in a slot-cutout direction. A plurality of insulators and, subsequently, electric conductors are respectively inserted into the plurality of slots in the slot-cutout direction. The insulators are prevented from being damaged by sharp-edged burs formed when the plurality of conductor segments are inserted in the slot-cutout direction.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: January 1, 2002
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Atsushi Umeda, Tsutomu Shiga
  • Cooling arrangement of vehicle rotary electric machine
    Publication number: 20010054852
    Abstract: A vehicle rotary electric machine includes a rotor having a plurality of claw-shaped pole pieces, a cooling fan, a stator core, a stator winding and a frame. A coil-end-gap is formed along the axial end of the stator core between outside portions of the stator winding extending from each pair of adjacent slots, and a cylindrical wall member is disposed between the frame and coil-ends of the stator winding.
    Type: Application
    Filed: June 12, 2001
    Publication date: December 27, 2001
    Applicant: DENSO CORPORATION
    Inventors: Shigenobu Nakamura, Shin Kusase
  • Stator arrangement of rotary electric machine
    Patent number: 6313559
    Abstract: In an rotary electric machine, such as a AC generator for a vehicle includes a rotor, a stator core disposed around the rotor, and stator winding, the stator core is comprised of a slot member having a plurality of slots formed at an outer periphery thereof to open radially outward and a ring member fitted to the slot member to close the plurality of slots. If the inside diameter of the slot member is Di, and the outside diameter of the ring member is Do, a diameter ratio Di/Do is equal to or larger than 76%.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: November 6, 2001
    Assignee: Denso Corporation
    Inventors: Shin Kusase, Tsutomu Shiga, Atsushi Umeda
  • Alternator for vehicle
    Patent number: 6291918
    Abstract: It is an object of this invention to provide a compact high-power alternator for a vehicle. It is another object of this invention to provide a low-noise alternator for a vehicle which outputs an increased power during operation at a low rotational speed. An alternator 1 for a vehicle includes a stator 2 having inner circumferential surfaces formed with many slots having open ends 35. Teeth ends of the stator between the slots have magnetic-flux collecting projections 36 extending in circumferential directions. The magnetic-flux collecting projections 36 are previously formed by, for example, a pressing process during a stage in which they are thin steel plates. An electric conductor forming a winding 33 has a diameter greater than a width of inner openings of the slots.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: September 18, 2001
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase
  • Stator of vehicle AC generator with circumferentially offset coil ends
    Patent number: 6252326
    Abstract: A stator of a vehicle AC generator includes a stator core having a plurality of slots and a stator winding having a plurality of circumferentially aligned U-shaped conductor segments. One group of the U-shaped conductor segments have first turn portions and another group of U-shaped conductor segments have second turn portions enclosed by the first turn portions. The first turn portions and the second turn portions are shifted from one another in the circumferential direction to provide a distance therebetween for insulation as well as cooling air.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: June 26, 2001
    Assignee: Denso Corporation
    Inventors: Atsushi Umeda, Tsutomu Shiga, Shin Kusase