Patents by Inventor Gregory John Venhaus

Gregory John Venhaus 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).

  • Closed-transition variable-frequency drive apparatus and methods
    Patent number: 10033322
    Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: July 24, 2018
    Assignee: Eaton Intelligent Power Limited
    Inventors: Irving Albert Gibbs, Thomas Arthur Farr, Gregory John Venhaus, Aaron H. VanderMeulen
  • CLOSED-TRANSITION VARIABLE-FREQUENCY DRIVE APPARATUS AND METHODS
    Publication number: 20170126164
    Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.
    Type: Application
    Filed: March 1, 2016
    Publication date: May 4, 2017
    Inventors: Irving Albert Gibbs, Thomas Arthur Farr, Gregory John Venhaus, Aaron H. VanderMeulen