Patents by Inventor Masatoshi Kohmura

Masatoshi Kohmura 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).

  • Rotary electric machine for vehicle
    Patent number: 6504346
    Abstract: A rotary electric machine has two sub-windings shifted by 30 degrees from each other. Each sub-winding is connected to an individual bridge which has MOS transistors on the ground sides. It is possible to supply a charging current even at a low rotational speed by switching the MOS transistors at a high-frequency. The basic components of magnetic force are canceled because of the shifted sub-windings. The switching components of the magnetic forces generated by the switching operation are canceled by switching two groups of the MOS transistors in opposite states. As a result, it is possible to decrease the magnetic noise significantly.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: January 7, 2003
    Assignee: Denso Corporation
    Inventors: Shigenobu Nakamura, Atsushi Umeda, Masatoshi Kohmura
  • Rotary electric machine for vehicle
    Publication number: 20010054882
    Abstract: A rotary electric machine has two sub-windings shifted by 30 degrees from each other. Each sub-winding is connected to an individual bridge which has MOS transistors on the ground sides. It is possible to supply a charging current even at a low rotational speed by switching the MOS transistors at a high-frequency. The basic components of magnetic force are canceled because of the shifted sub-windings. The switching components of the magnetic forces generated by the switching operation are canceled by switching two groups of the MOS transistors in opposite states. As a result, it is possible to decrease the magnetic noise significantly.
    Type: Application
    Filed: June 19, 2001
    Publication date: December 27, 2001
    Applicant: DENSO CORPORATION
    Inventors: Shigenobu Nakamura, Atsushi Umeda, Masatoshi Kohmura