Patents by Inventor Karienne A. Yockey

Karienne A. Yockey 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).

  • Apparatus for DC motor position detection with capacitive ripple current extraction
    Patent number: 7064509
    Abstract: An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capacitor partially sources the motor current ripples during commutation and recharges itself during the off-commutation period. Since the number of commutation events per mechanical revolution is pre-determined once the DC motor is designed, the frequency of the AC ripple currents through the capacitor corresponds to the frequency of commutation, and thus a motor position of the DC motor.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: June 20, 2006
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Zhenxing Fu, Karienne A. Yockey, Frank J. Aiello, James R. Winkelman, Frank J. Haas