Patents by Inventor Ajit Bhanot

Ajit Bhanot 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).

  • Method and apparatus for identifying an operational phase of a motor phase winding and controlling energization of the phase winding
    Patent number: 7412339
    Abstract: A method for identifying an operational phase of a motor may include obtaining a first value of a signal that is indicative of the operational phase of the motor and obtaining a second value of the signal after a period of time has expired. The method further includes identifying a first operational phase of the motor if the second value exceeds the first value by a non-negative first threshold value. A second operational phase of the motor is identified if the second value does not exceed the first value by the first threshold value. The first and second operational phases may correspond to relative positions of a motor's rotor and stator, such that periods of energization may be identified for producing motoring or regenerative torque.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: August 12, 2008
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Krishnan Ramu, Ajit Bhanot
  • Method and apparatus for identifying an operational phase of a motor phase winding and controlling energization of the phase winding
    Publication number: 20050154545
    Abstract: A method for identifying an operational phase of a motor may include obtaining a first value of a signal that is indicative of the operational phase of the motor and obtaining a second value of the signal after a period of time has expired. The method further includes identifying a first operational phase of the motor if the second value exceeds the first value by a non-negative first threshold value. A second operational phase of the motor is identified if the second value does not exceed the first value by the first threshold value. The first and second operational phases may correspond to relative positions of a motor's rotor and stator, such that periods of energization may be identified for producing motoring or regenerative torque.
    Type: Application
    Filed: November 24, 2004
    Publication date: July 14, 2005
    Inventors: Krishnan Ramu, Ajit Bhanot