Patents by Inventor Santosh M. BHANDARKAR

Santosh M. BHANDARKAR 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).

  • Filter capacitor degradation and calibration
    Patent number: 9735696
    Abstract: Methods and power conversion systems in which a capacitor degradation detection system includes an adjustable gain amplifier circuit is calibrated by automatic adjustment of at least one amplifier gain to accommodate current and voltage levels of a particular filter circuit in a first mode. Capacitance values of filter capacitors are calculated according to amplified current signals and compared with an acceptable tolerance range to selectively identify a filter capacitor fault or to store calculated capacitance values as base values in an electronic memory in the first mode. During operation in a second mode with the rectifier and inverter on, the adjusted amplifier gain is used to amplify current sensor signals and/or voltage signals, and capacitance values of the filter capacitors are used to selectively identify capacitor degradation.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: August 15, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Santosh M. Bhandarkar, Sinuhe Imuris Benitez Escobar, Nikhil Prasad
  • FILTER CAPACITOR DEGRADATION AND CALIBRATION
    Publication number: 20170149343
    Abstract: Methods and power conversion systems in which a capacitor degradation detection system includes an adjustable gain amplifier circuit is calibrated by automatic adjustment of at least one amplifier gain to accommodate current and voltage levels of a particular filter circuit in a first mode. Capacitance values of filter capacitors are calculated according to amplified current signals and compared with an acceptable tolerance range to selectively identify a filter capacitor fault or to store calculated capacitance values as base values in an electronic memory in the first mode. During operation in a second mode with the rectifier and inverter on, the adjusted amplifier gain is used to amplify current sensor signals and/or voltage signals, and capacitance values of the filter capacitors are used to selectively identify capacitor degradation.
    Type: Application
    Filed: November 25, 2015
    Publication date: May 25, 2017
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Santosh M. BHANDARKAR, Sinuhe Imuris BENITEZ ESCOBAR, Nikhil PRASAD