Patents by Inventor Yoshihide ITOH

Yoshihide ITOH 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 improved to carry out load-dump protection
    Patent number: 8547071
    Abstract: In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: October 1, 2013
    Assignee: Denso Corporation
    Inventors: Harumi Horihata, Yoshihide Itoh, Hideaki Nakayama
  • ROTARY ELECTRIC MACHINE IMPROVED TO CARRY OUT LOAD-DUMP PROTECTION
    Publication number: 20120001598
    Abstract: In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Applicant: DENSO CORPORATION
    Inventors: Harumi HORIHATA, Yoshihide ITOH, Hideaki NAKAYAMA