Patents by Inventor Douglas Wittenmyer

Douglas Wittenmyer 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 and method for ride through for AC induction motors
    Publication number: 20050248308
    Abstract: A method and an apparatus for controlling ride through of an induction motor by detecting a power loss from a power supply connected to the induction motor, disconnecting the induction motor from the power supply, monitoring a line voltage of the power supply, monitoring a back emf voltage generated by the induction motor and monitoring a phase differential between the line voltage and the back emf voltage. It is determined whether the monitored voltages are within a predetermined voltage limit and the phase differential is within a predetermined phase limit and the power supply is re-connected to the induction motor in response to the monitored voltages being within the predetermined voltage limit and the monitored phase differential being within the predetermined phase limit.
    Type: Application
    Filed: September 20, 2004
    Publication date: November 10, 2005
    Applicant: Bay Controls, Inc.
    Inventors: Thomas Reed, Douglas Wittenmyer