Patents by Inventor Masakatsu SAWADA

Masakatsu SAWADA 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).

  • Leakage current calculation device and leakage current calculation method
    Patent number: 10145886
    Abstract: Provided is a leakage current value calculation device which precisely calculates a leakage current I0r which is a component caused by a ground insulation resistance value of an electric circuit, in the leakage current I0 flowing through the electric circuit.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: December 4, 2018
    Assignee: Tanashin Denki Co., Ltd.
    Inventors: Kenya Matsushita, Masakatsu Sawada
  • LEAKAGE CURRENT CALCULATION DEVICE AND LEAKAGE CURRENT CALCULATION METHOD
    Publication number: 20170307675
    Abstract: Provided is a leakage current value calculation device which precisely calculates a leakage current I0r which is a component caused by a ground insulation resistance value of an electric circuit, in the leakage current I0 flowing through the electric circuit.
    Type: Application
    Filed: September 7, 2015
    Publication date: October 26, 2017
    Inventors: KENYA MATSUSHITA, MASAKATSU SAWADA
  • Leakage current calculation device and method for calculating leakage current
    Patent number: 9465065
    Abstract: Provided is a leakage current calculation device capable of calculating an accurate leakage current value in which the effect of noise has been suppressed.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: October 11, 2016
    Assignee: TANASHIN DENKI CO., LTD.
    Inventors: Kenya Matsushita, Masakatsu Sawada
  • LEAKAGE CURRENT CALCULATION DEVICE AND METHOD FOR CALCULATING LEAKAGE CURRENT
    Publication number: 20160124038
    Abstract: Provided is a leakage current calculation device capable of calculating an accurate leakage current value in which the effect of noise has been suppressed.
    Type: Application
    Filed: April 16, 2014
    Publication date: May 5, 2016
    Inventors: KENYA MATSUSHITA, MASAKATSU SAWADA
  • Signal generation device and signal generation method
    Patent number: 9013156
    Abstract: A signal generation device and a signal generation method may measure leakage currents, such as an input current value I and phase-shifted current values I cos ? and I sin ? in a short period of time and automatically output the detected values without calculating a vector of a phase difference. The signal generation device generates logical signals from a voltage waveform and a current waveform of a measured power line through first and second comparators, sets parameters, full-wave rectifies the current waveform, and performs quantization transform on the full-wave rectified current waveform using a successive ??ADC.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: April 21, 2015
    Assignee: Tanashin Denki Co., Ltd.
    Inventors: Masakatsu Sawada, Kenya Matsushita
  • SIGNAL GENERATION DEVICE AND SIGNAL GENERATION METHOD
    Publication number: 20150054475
    Abstract: A signal generation device and a signal generation method may measure leakage currents, such as an input current value I and phase-shifted current values I cos ? and I sin ? in a short period of time and automatically output the detected values without calculating a vector of a phase difference. The signal generation device generates logical signals from a voltage waveform and a current waveform of a measured power line through first and second comparators, sets parameters, full-wave rectifies the current waveform, and performs quantization transform on the full-wave rectified current waveform using a successive ??ADC.
    Type: Application
    Filed: May 24, 2013
    Publication date: February 26, 2015
    Inventors: Masakatsu SAWADA, Kenya MATSUSHITA