Patents by Inventor Dennis L. ELDRED, JR.

Dennis L. ELDRED, JR. 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).

  • Frequency tracking piezoelectric transformer power converter with simultaneous two-parameter control
    Patent number: 9871182
    Abstract: The present invention is directed to a piezoelectric transformer based power converter that exhibits efficient operating point tracking ability while providing output regulation by means of simultaneous two-parameter control of the converter power stage. A regulation control stage provides the power stage a regulation control signal indicative of the difference between the measured output parameter and a set-point reference, therefore continuously controlling the gain of the converter to result in a stabilized, regulated output. Additionally, a frequency control stage simultaneously provides the power stage with a frequency control signal correlative to the difference between the current and desired operating points of the piezoelectric transformer. The power stage then translates the frequency control signal into an adjustment to the operational frequency of the input signal to the piezoelectric transformer, as to continuously drive the operating point to the desired position.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: January 16, 2018
    Assignee: QorTek, Inc.
    Inventors: William M. Bradley, Ross W. Bird, Gareth J. Knowles, Jonathan M. Zook, Dennis L. Eldred, Jr.
  • FREQUENCY TRACKING PIEZOELECTRIC TRANSFORMER POWER CONVERTER WITH SIMULTANEOUS TWO-PARAMETER CONTROL
    Publication number: 20160043298
    Abstract: The present invention is directed to a piezoelectric transformer based power converter that exhibits efficient operating point tracking ability while providing output regulation by means of simultaneous two-parameter control of the converter power stage. A regulation control stage provides the power stage a regulation control signal indicative of the difference between the measured output parameter and a set-point reference, therefore continuously controlling the gain of the converter to result in a stabilized, regulated output. Additionally, a frequency control stage simultaneously provides the power stage with a frequency control signal correlative to the difference between the current and desired operating points of the piezoelectric transformer. The power stage then translates the frequency control signal into an adjustment to the operational frequency of the input signal to the piezoelectric transformer, as to continuously drive the operating point to the desired position.
    Type: Application
    Filed: March 17, 2014
    Publication date: February 11, 2016
    Applicant: QORTEK, INC.
    Inventors: William M. BRADLEY, Ross W. BIRD, Jonathan ZOOK, Dennis L. ELDRED, JR., Gareth J. KNOWLES