Patents by Inventor John David Maurin, JR.

John David Maurin, 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).

  • Adjustable frequency drive systems and methods of employing power compensation
    Patent number: 11300632
    Abstract: An apparatus, such as an adjustable frequency drive (AFD), includes an inverter configured to be selectively coupled to a motor in a first mode and an AC line in a second mode and a control circuit configured to operate the inverter as a motor drive in the first mode and as a power compensator in the second mode. The power compensator may provide power factor correction. The control circuit may include a scalar controller configured to control the inverter according to a voltage vs. frequency characteristic determined by a field weakening point reference and the control circuit may vary the field weakening point reference in the second mode. The inverter may have an input coupled to a DC bus and the control circuit may be configured to adjust a frequency of the inverter in the second mode to increase a voltage on the DC bus.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: April 12, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: John David Maurin, Jr., Stan Rex Simms, Thomas Arthur Farr
  • Adjustable Frequency Drive Systems and Methods of Employing Power Compensation
    Publication number: 20200191878
    Abstract: An apparatus, such as an adjustable frequency drive (AFD), includes an inverter configured to be selectively coupled to a motor in a first mode and an AC line in a second mode and a control circuit configured to operate the inverter as a motor drive in the first mode and as a power compensator in the second mode. The power compensator may provide power factor correction. The control circuit may include a scalar controller configured to control the inverter according to a voltage vs. frequency characteristic determined by a field weakening point reference and the control circuit may vary the field weakening point reference in the second mode. The inverter may have an input coupled to a DC bus and the control circuit may be configured to adjust a frequency of the inverter in the second mode to increase a voltage on the DC bus.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 18, 2020
    Inventors: John David Maurin, JR., Stan Rex Simms, Thomas Arthur Farr
  • FULLY INTEGRATED MEDIUM VOLTAGE INPUT LOW VOLTAGE OUTPUT VARIABLE FREQUENCY DRIVE SYSTEM
    Publication number: 20150357946
    Abstract: A motor drive system includes a step down phase shifting isolation transformer structured to receive medium voltage AC power from an AC bus and convert the medium voltage AC power to tow voltage AC power, a converter structured to receive the low voltage AC power and convert the low voltage AC power to DC power and output the DC power to a DC bus, and a tow voltage inverter structured to receive the DC power from the DC bus and convert the DC power to a second low voltage AC power.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 10, 2015
    Applicant: EATON CORPORATION
    Inventors: THOMAS ARTHUR FARR, John David Maurin, JR., James Alan Yoho