Patents by Inventor Ajith H Wijenayake

Ajith H Wijenayake 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).

  • Reducing photovoltaic array voltage during inverter re-enablement
    Patent number: 9172312
    Abstract: An apparatus for harvesting solar power includes a photovoltaic array for generating a DC voltage; a discharge circuit for causing the DC voltage to decay from a first value to a second value; and an inverter circuit for transforming an output voltage from the discharge circuit into an AC voltage.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: October 27, 2015
    Assignee: American Superconductor Corporation
    Inventors: Douglas C. Folts, Kleber V. C. Facchini, Ajith H. Wijenayake, Gary J. Bowers
  • Power electronic module pre-charge system and method
    Patent number: 7830036
    Abstract: A power electronics device with an improved pre-charge circuit configuration is provided. More specifically, the input of the motor drive module may accept an AC or DC source voltage. In this way, the pre-charge circuit of the motor drive module may be utilized whether the motor drive is coupled to an AC or DC source.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: November 9, 2010
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Richard A Lukaszewski, Ajith H Wijenayake, Paul Krause, Michael Loth
  • REDUCING PHOTOVOLTAIC ARRAY VOLTAGE DURING INVERTER RE-ENABLEMENT
    Publication number: 20100275966
    Abstract: An apparatus for harvesting solar power includes a photovoltaic array for generating a DC voltage; a discharge circuit for causing the DC voltage to decay from a first value to a second value; and an inverter circuit for transforming an output voltage from the discharge circuit into an AC voltage.
    Type: Application
    Filed: November 25, 2009
    Publication date: November 4, 2010
    Applicant: American Superconductor Corporation
    Inventors: Douglas C. Folts, Kleber V. C. Facchini, Ajith H. Wijenayake, Gary J. Bowers
  • POWER ELECTRONIC MODULE PRE-CHARGE SYSTEM AND METHOD
    Publication number: 20100078998
    Abstract: A power electronics device with an improved pre-charge circuit configuration is provided. More specifically, the input of the motor drive module may accept an AC or DC source voltage. In this way, the pre-charge circuit of the motor drive module may be utilized whether the motor drive is coupled to an AC or DC source.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Richard A. Lukaszewski, Ajith H. Wijenayake, Paul Krause, Michael Loth