Patents by Inventor Yasuhiro Masuya

Yasuhiro Masuya 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).

  • Switching power supply unit
    Patent number: 8400120
    Abstract: A control function formula which provides a relationship between an output voltage signal Vo and an output differential value with, for example, a negative linear function is defined in a calculation means. The calculation means samples an input voltage signal, an output voltage signal and an output differential signal at time instants in synchronization with a cycle of switching of a main switching element, and calculates subsequent ON and OFF durations of the main switching elements such that the control function formula might be satisfied. A drive pulse generation means generates a drive pulse with which the main switching element is turned on and off based on the ON and OFF durations determined by the calculation means. The output differential signal is generated by, for example, a capacitor current detection means or an observer device which detect a current of a smoothing capacitor.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: March 19, 2013
    Assignee: Cosel Co., Ltd.
    Inventors: Takeshi Usuda, Yoshiki Matsuo, Takeshi Takayanagi, Yasuhiro Masuya
  • SWITCHING POWER SUPPLY UNIT
    Publication number: 20110096571
    Abstract: A control function formula which provides a relationship between an output voltage signal Vo and an output differential value with, for example, a negative linear function is defined in a calculation means. The calculation means samples an input voltage signal, an output voltage signal and an output differential signal at time instants in synchronization with a cycle of switching of a main switching element, and calculates subsequent ON and OFF durations of the main switching elements such that the control function formula might be satisfied. A drive pulse generation means generates a drive pulse with which the main switching element is turned on and off based on the ON and OFF durations determined by the calculation means. The output differential signal is generated by, for example, a capacitor current detection means or an observer device which detect a current of a smoothing capacitor.
    Type: Application
    Filed: October 25, 2010
    Publication date: April 28, 2011
    Applicant: Cosel Co., Ltd.
    Inventors: Takeshi USUDA, Yoshiki Matsuo, Takeshi Takayanagi, Yasuhiro Masuya