Patents by Inventor Parag Kshirsagar

Parag Kshirsagar 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).

  • Magnetic bearing fault-tolerant drive system
    Patent number: 10578156
    Abstract: An electronic magnetic bearing fault-tolerant drive module includes a first plurality of switching elements and a second plurality of switching elements. At least one winding is interposed between the first plurality of switching elements and the second plurality of switching elements. The first and second switching elements are configured to selectively operate in a first mode and a second mode to generate an electromagnetic field. The electronic magnetic bearing fault-tolerant drive module is configured to detect one or more electrical faults including an open-circuit fault of at least one of the first and second switching elements.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 3, 2020
    Assignee: CARRIER CORPORATION
    Inventors: Dong Jiang, Parag Kshirsagar
  • Multiple-axis magnetic bearing and control of the magnetic bearing with active switch topologies
    Patent number: 9890811
    Abstract: A magnetic bearing system (120) includes a first active magnetic bearing (AMB) (202) including a first group of electromagnetic actuators (306, 310, 314, 318) to support a shaft and a second AMB (204) including a second group of electromagnetic actuators (308, 312, 316, 320) to support the shaft. A controller for the two AMB's includes a multi-phase topology (400) with a plurality of active current switches for controlling the electromagnetic actuators (306-320) of each of the first AMB (202) and the second AMB (204). Each electromagnetic actuator (306, 310, 314, 318) of the first AMB (202) is electrically coupled to an electromagnetic actuator (308, 312, 316, 320) of the second AMB (204).
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: February 13, 2018
    Assignee: CARRIER CORPORATION
    Inventors: Parag Kshirsagar, Peng Yan
  • MAGNETIC BEARING FAULT-TOLERANT DRIVE SYSTEM
    Publication number: 20170307012
    Abstract: An electronic magnetic bearing fault-tolerant drive module includes a first plurality of switching elements and a second plurality of switching elements. At least one winding is interposed between the first plurality of switching elements and the second plurality of switching elements. The first and second switching elements are configured to selectively operate in a first mode and a second mode to generate an electromagnetic field. The electronic magnetic bearing fault-tolerant drive module is configured to detect one or more electrical faults including an open-circuit fault of at least one of the first and second switching elements.
    Type: Application
    Filed: October 27, 2015
    Publication date: October 26, 2017
    Inventors: Dong Jiang, Parag Kshirsagar
  • MULTIPLE-AXIS MAGNETIC BEARING AND CONTROL OF THE MAGNETIC BEARING WITH ACTIVE SWITCH TOPOLOGIES
    Publication number: 20150068243
    Abstract: A magnetic bearing system (120) includes a first active magnetic bearing (AMB) (202) including a first group of electromagnetic actuators (306, 310, 314, 318) to support a shaft and a second AMB (204) including a second group of electromagnetic actuators (308, 312, 316, 320) to support the shaft. A controller for the two AMB's includes a multi-phase topology (400) with a plurality of active current switches for controlling the electromagnetic actuators (306-320) of each of the first AMB (202) and the second AMB (204). Each electromagnetic actuator (306, 310, 314, 318) of the first AMB (202) is electrically coupled to an electromagnetic actuator (308, 312, 316, 320) of the second AMB (204).
    Type: Application
    Filed: April 3, 2013
    Publication date: March 12, 2015
    Inventors: Parag Kshirsagar, Peng Yan
  • Multilevel unidirectional rectifier with N-2 switches per phase leg
    Patent number: 8547717
    Abstract: An N-level rectifier, wherein N is a number of voltage levels of the rectifier, includes an input; a plurality of switching devices connected in parallel, wherein the plurality of switching devices are connected to the input, wherein a number of the plurality of switching devices is equal to N?2; and a plurality of capacitors connected in series, wherein the plurality of capacitors are connected to the plurality of switching devices, wherein a number of the plurality of capacitors is equal to N?1, and wherein the plurality of capacitors are connected to an output of the N-level rectifier; wherein N is greater than three.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: October 1, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Parag Kshirsagar
  • Multilevel Unidirectional Rectifier with N-2 Switches Per Phase Leg
    Publication number: 20110291737
    Abstract: An N-level rectifier, wherein N is a number of voltage levels of the rectifier, includes an input; a plurality of switching devices connected in parallel, wherein the plurality of switching devices are connected to the input, wherein a number of the plurality of switching devices is equal to N?2; and a plurality of capacitors connected in series, wherein the plurality of capacitors are connected to the plurality of switching devices, wherein a number of the plurality of capacitors is equal to N?1, and wherein the plurality of capacitors are connected to an output of the N-level rectifier; wherein N is greater than three.
    Type: Application
    Filed: May 26, 2010
    Publication date: December 1, 2011
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Parag Kshirsagar