Patents by Inventor Tomiya Ogata

Tomiya Ogata 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).

  • Method of manufacturing a stator core
    Publication number: 20050206267
    Abstract: A motor stator core for achieving improved magnetizing feature in lower magnetic fields and reduced iron loss, and improving motor power. The stator core fabriated out of non-oriented electrical steel sheets is annealed by applying a magnetic field to the heated stator core at least in the temperature range from a temperature immediately above a Curie point thereof to 300° C. in the process of cooling the stator core. The magnetic field has the same direction as the direction of exitation of a stator in the motor when used to drive a motor. This increases the magnetic induction in lower magnetic fields in particular and reduces the hysteresis loss, with a reduction in the total iron loss of the stator. A motor using this stator core increases in saturation induction under exciting currents of higher frequncies, allowing enhanced motor power.
    Type: Application
    Filed: May 18, 2005
    Publication date: September 22, 2005
    Inventors: Hiromichi Koshiishi, Tomiya Ogata, Shigeki Eguchi, Hideo Hasegawa
  • Method of manufacturing a stator core
    Patent number: 6938324
    Abstract: A motor stator core for achieving improved magnetizing feature in lower magnetic fields and reduced iron loss, and improving motor power. The stator core fabriated out of non-oriented electrical steel sheets is annealed by applying a magnetic field to the heated stator core at least in the temperature range from a temperature immediately above a Curie point thereof to 300° C. in the process of cooling the stator core. The magnetic field has the same direction as the direction of exitation of a stator in the motor when used to drive a motor. This increases the magnetic induction in lower magnetic fields in particular and reduces the hysteresis loss, with a reduction in the total iron loss of the stator. A motor using this stator core increases in saturation induction under exciting currents of higher frequncies, allowing enhanced motor power.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: September 6, 2005
    Assignees: Toyo Tessin Kogyo Co., Ltd., Hi-Z Co., Ltd.
    Inventors: Hiromichi Koshiishi, Tomiya Ogata, Shigeki Eguchi, Hideo Hasegawa
  • Motor stator core and method of manufacturing the same
    Publication number: 20040135459
    Abstract: A motor stator core for achieving improved magnetizing feature in lower magnetic fields and reduced iron loss, and improving motor power. The stator core fabriated out of non-oriented electrical steel sheets is annealed by applying a magnetic field to the heated stator core at least in the temperature range from a temperature immediately above a Curie point thereof to 300° C. in the process of cooling the stator core. The magnetic field has the same direction as the direction of exitation of a stator in the motor when used to drive a motor. This increases the magnetic induction in lower magnetic fields in particular and reduces the hysteresis loss, with a reduction in the total iron loss of the stator. A motor using this stator core increases in saturation induction under exciting currents of higher frequncies, allowing enhanced motor power.
    Type: Application
    Filed: October 21, 2003
    Publication date: July 15, 2004
    Inventors: Hiromichi Koshiishi, Tomiya Ogata, Shigeki Eguchi, Hideo Hasegawa