Patents by Inventor Trishan Esram

Trishan Esram 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).

  • Patent number: 8120933
    Abstract: A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first switch and second switch of the power converter may be operated to supply the AC load with positive current respective to the AC load from the DC power source. A third and fourth switch of the power converter may be operated to supply the AC load with negative current respective to the AC load from the DC power source. A first diode may be electrically coupled in series with the second switch and second diode may be electrically coupled in parallel with the first diode and the second switch. The second diode may conduct the positive current when the first switch is off and the second switch is on. A third diode may be electrically coupled in series with the fourth switch and a fourth diode may be electrically coupled in parallel with the third diode and the fourth switch.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: February 21, 2012
    Assignee: SolarBridge Technologies, Inc.
    Inventors: Patrick L. Chapman, Trishan Esram
  • Publication number: 20110211379
    Abstract: A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first switch and second switch of the power converter may be operated to supply the AC load with positive current respective to the AC load from the DC power source. A third and fourth switch of the power converter may be operated to supply the AC load with negative current respective to the AC load from the DC power source. A first diode may be electrically coupled in series with the second switch and second diode may be electrically coupled in parallel with the first diode and the second switch. The second diode may conduct the positive current when the first switch is off and the second switch is on. A third diode may be electrically coupled in series with the fourth switch and a fourth diode may be electrically coupled in parallel with the third diode and the fourth switch.
    Type: Application
    Filed: March 1, 2010
    Publication date: September 1, 2011
    Applicant: SolarBridge Technologies
    Inventors: Patrick L. Chapman, Trishan Esram
  • Publication number: 20110084556
    Abstract: A system and apparatus for interconnecting an array of power generating assemblies includes a cable assembly having a plurality of continuous conductors and a plurality of cable connectors electrically coupled to the continuous conductors. The continuous conductors are configured to receive inverter AC power generated by inverters and deliver the combined AC power to an AC grid or other power sink. The cable connectors are configured to mate with corresponding connectors of the inventers to deliver the AC power to the continuous conductors.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 14, 2011
    Inventors: Marco A. Marroquin, Thomas Paul Parker, Stephen P. Wurmlinger, Robert S. Balog, Trishan Esram, Jeremiah Noel Foley
  • Publication number: 20110026281
    Abstract: An apparatus and method for controlling the delivery of power from a DC source to an AC grid includes an inverter configured to deliver power from the unipolar input source to the AC grid and an inverter controller. The inverter includes an input converter, an active filter, and an output converter. The inverter controller includes an input converter controller, an active filter controller and an output converter controller. The input converter controller is configured to control a current delivered by the input converter to a galvanically isolated unipolar bus of the inverter. The output converter is configured to control the output converter to deliver power to the AC grid. Additionally, the active filter controller is configured to control the active filter to supply substantially all the power that is deliver by the output controller to the AC grid at a grid frequency.
    Type: Application
    Filed: September 21, 2009
    Publication date: February 3, 2011
    Inventors: Patrick L. Chapman, Brian T. Kuhn, Robert S. Balog, Jonathan W. Kimball, Philip T. Krein, Alexander Gray, Trishan Esram