Patents by Inventor Kota TAKAGAKI

Kota TAKAGAKI 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).

  • Chopper circuit control device for controlling a duty cycle of a chopper circuit in accordance with limits of an operation value range
    Patent number: 10033274
    Abstract: A range calculator (12) calculates an operation value range, which is range of an operation value tor controlling a duty cycle of a chopper circuit (4) based on an input voltage and output voltage command value of the chopper circuit (4). A chopper circuit control device (1) controls the duty cycle of the chopper circuit (4) by using an upper limit value of the operation value range when an operation value is greater than or equal to the upper limit value of the operation value range, by using the operation value when the operation value is within the operation value range, and by using a lower limit value of the operation value range when the operation value is less than or equal to the lower limit value of the operation value range.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: July 24, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kota Takagaki, Ryotaro Harada
  • CHOPPER CIRCUIT CONTROL DEVICE
    Publication number: 20170302155
    Abstract: A range calculator (12) calculates an operation value range, which is range of an operation value for controlling a duty cycle of a chopper circuit (4) based on an input voltage and output voltage command value of the chopper circuit (4). A chopper circuit control device (1) controls the duty cycle of the chopper circuit (4) by using an upper limit value of the operation value range when an operation value is greater than or equal to the upper limit value of the operation value range, by using the operation value when the operation value is within the operation value range, and by using a lower limit value of the operation value range when the operation value is less than or equal to the lower limit value of the operation value range.
    Type: Application
    Filed: October 2, 2014
    Publication date: October 19, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kota TAKAGAKI, Ryotaro HARADA