Patents by Inventor Aparna S Amberkar

Aparna S Amberkar 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).

  • Current estimation for an electric machine
    Patent number: 6549871
    Abstract: A method and system for estimating current in a PM electric machine is disclosed. The method includes acquiring a torque value representative of the torque produced by the electric machine; receiving a position value indicative of the rotational position of the electric machine; obtaining a speed value indicative of the rotational velocity of the electric machine; receiving a temperature value representative of a temperature of the electric machine; calculating an estimate of the current. Where the calculating is based upon at least one of the torque value, the position value, the speed value, and the temperature value.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: April 15, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Sayeed A. Mir, Aparna S Amberkar
  • Robust determination of hand-wheel position
    Patent number: 6535805
    Abstract: An absolute hand-wheel position tracking system for an electric power steering system having a hand-wheel, an assist motor for providing an assist torque disposed relative to the hand-wheel, and a motor position sensor responsive to the assist motor, includes a hand-wheel position initialization function responsive to the hand-wheel; a motor position correction and scaling function responsive to the motor position sensor and responsive to the assist torque; an enable function responsive to the assist torque and responsive to the hand-wheel position initialization function; and an absolute hand-wheel position generation function in signal communication with the hand-wheel position initialization function, the motor position correction and scaling function, and the enable function.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: March 18, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Aparna S Amberkar, Mark Philip Colosky
  • ROBUST DETERMINATION OF HAND-WHEEL POSITION
    Publication number: 20030033064
    Abstract: An absolute hand-wheel position tracking system for an electric power steering system having a hand-wheel, an assist motor for providing an assist torque disposed relative to the hand-wheel, and a motor position sensor responsive to the assist motor, includes a hand-wheel position initialization function responsive to the hand-wheel; a motor position correction and scaling function responsive to the motor position sensor and responsive to the assist torque; an enable function responsive to the assist torque and responsive to the hand-wheel position initialization function; and an absolute hand-wheel position generation function in signal communication with the hand-wheel position initialization function, the motor position correction and scaling function, and the enable function.
    Type: Application
    Filed: August 10, 2001
    Publication date: February 13, 2003
    Inventors: Aparna S. Amberkar, Mark Philip Colosky