Patents by Inventor Sampat F. Shekhawat

Sampat F. Shekhawat 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).

  • DC to AC inverter with neutral having a resonant circuit
    Patent number: 4862342
    Abstract: An inverter for producing a one or three phase output with neutral is disclosed. An LC resonant circuit is selectively switched by an inverter to produce one or three phases having a fundamental frequency equal to the frequency of each switching circuit within the phases of the inverter. The outputs are filtered to remove higher harmonics to pass the filtered output to the load. Energy is fed back into the resonant circuit by short circuiting the switching circuits at the time that the ouput voltage across a switching circuit is zero to minimize switching losses.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: August 29, 1989
    Assignee: Sundstrand Corp.
    Inventors: John J. Dhyanchand, Sampat F. Shekhawat, Vietson M. Nguyen