Patents by Inventor Christopher Czerwinski

Christopher Czerwinski 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).

  • Operating a three phase device using single phase power
    Patent number: 7609534
    Abstract: A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: October 27, 2009
    Assignee: Otis Elevator Company
    Inventors: Ismail Agirman, Vladimir Blasko, Christopher Czerwinski
  • Operating a Three Phase Device Using Single Phase Power
    Publication number: 20070253231
    Abstract: A powering arrangement for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.
    Type: Application
    Filed: August 19, 2004
    Publication date: November 1, 2007
    Inventors: Ismail Agirman, Vladimir Blasko, Christopher Czerwinski