Patents by Inventor Vishnu Mahadeva Iyer

Vishnu Mahadeva Iyer 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).

  • Publication number: 20240006917
    Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanger coil configured to exchange power. The contactless power transfer system also includes a first power converter operatively coupled to the first power exchanger coil and configured to convert a direct current power to an alternating current power at a system frequency. The contactless power transfer system further includes a controller configured to control an operating state of the first power converter to vary an alternating current power provided to the first power exchanger coil at the system frequency.
    Type: Application
    Filed: September 18, 2023
    Publication date: January 4, 2024
    Inventors: Pradeep Vijayan, Rajendra Naik, Arun Kumar Raghunathan, Vishnu Mahadeva Iyer
  • Publication number: 20230356849
    Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.
    Type: Application
    Filed: July 17, 2023
    Publication date: November 9, 2023
    Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
  • Patent number: 11764609
    Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanger coil configured to exchange power. The contactless power transfer system also includes a first power converter operatively coupled to the first power exchanger coil and configured to convert a direct current power to an alternating current power at a system frequency. The contactless power transfer system further includes a controller configured to control an operating state of the first power converter to vary an alternating current power provided to the first power exchanger coil at the system frequency.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: September 19, 2023
    Assignee: General Electric Company
    Inventors: Pradeep Vijayan, Rajendra Naik, Arun Kumar Raghunathan, Vishnu Mahadeva Iyer
  • Publication number: 20220258867
    Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.
    Type: Application
    Filed: May 6, 2022
    Publication date: August 18, 2022
    Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
  • Publication number: 20220224162
    Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanger coil configured to exchange power. The contactless power transfer system also includes a first power converter operatively coupled to the first power exchanger coil and configured to convert a direct current power to an alternating current power at a system frequency. The contactless power transfer system further includes a controller configured to control an operating state of the first power converter to vary an alternating current power provided to the first power exchanger coil at the system frequency.
    Type: Application
    Filed: March 29, 2022
    Publication date: July 14, 2022
    Inventors: Pradeep Vijayan, Rajendra Naik, Arun Kumar Raghunathan, Vishnu Mahadeva Iyer
  • Patent number: 11325714
    Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: May 10, 2022
    Assignee: General Electric Company
    Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
  • Patent number: 11303156
    Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanger coil configured to exchange power. The contactless power transfer system also includes a first power converter operatively coupled to the first power exchanger coil and configured to convert a direct current power to an alternating current power at a system frequency. The contactless power transfer system further includes a controller configured to control an operating state of the first power converter to vary an alternating current power provided to the first power exchanger coil at the system frequency.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: April 12, 2022
    Assignee: General Electric Company
    Inventors: Pradeep Vijayan, Rajendra Naik, Arun Kumar Raghunathan, Vishnu Mahadeva Iyer
  • Publication number: 20220009643
    Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.
    Type: Application
    Filed: July 9, 2020
    Publication date: January 13, 2022
    Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
  • Patent number: 10897153
    Abstract: A charging pad for charging one or more receiver devices is disclosed. The charging pad includes at least one first resonator coil operable at a first frequency band and at least one second resonator coil operable at a second frequency band. Further, the charging pad includes at least one exciter coil magnetically coupled to the at least one first resonator coil and the at least one second resonator coil. In addition, the charging pad includes an excitation unit operationally coupled to the at least one exciter coil and configured to drive the at least one first resonator coil and the at least one second resonator coil via the at least one exciter coil.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: January 19, 2021
    Assignee: General Electric Company
    Inventors: Pradeep Vijayan, Somakumar Ramachandrapanicker, Deepak Aravind, Arun Kumar Raghunathan, Vishnu Mahadeva Iyer
  • Patent number: 10476264
    Abstract: A power distribution system in operative association with a source and a plurality of loads includes a converter, a power distribution unit including a plurality of solid state power controllers and configured to provide power from converter to plurality of loads, and a fault protection unit operatively coupled to converter, power distribution unit, or both. The fault protection unit includes a sensor configured to sense current at output terminal of at least one of power distribution unit and converter and a controller configured to compare sensed current with a corresponding threshold value of current, identify presence of a fault in at least one of plurality of loads, power distribution unit, and converter based on comparison, and activate a desired protection scheme to provide fault ride through during the presence of the fault.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: November 12, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Pradeep Vijayan, Satish Prabhakaran, John Oliver Collins, Vishnu Mahadeva Iyer
  • Patent number: 10097095
    Abstract: A variable frequency resonant converter includes an inverter stage, a resonant circuit, a transformer, a rectifier stage, and a controller. The inverter and rectifier stages include first and second FET devices. The inverter converts a DC input signal to a first AC signal. The resonant circuit is coupled to the inverter stage and filters the first AC signal. The transformer is coupled to the resonant circuit and converts the first AC signal to a second AC signal. The rectifier stage is coupled to the transformer and converts the second AC signal to a DC output signal. The controller is configured to operate both of the first and second FET devices substantially at a resonant frequency at least partially defined by the resonant circuit to generate the DC output signal according to a voltage setpoint.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: October 9, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Pradeep Vijayan, Vishnu Mahadeva Iyer
  • Publication number: 20180083545
    Abstract: A variable frequency resonant converter includes an inverter stage, a resonant circuit, a transformer, a rectifier stage, and a controller. The inverter and rectifier stages include first and second FET devices. The inverter converts a DC input signal to a first AC signal. The resonant circuit is coupled to the inverter stage and filters the first AC signal. The transformer is coupled to the resonant circuit and converts the first AC signal to a second AC signal. The rectifier stage is coupled to the transformer and converts the second AC signal to a DC output signal. The controller is configured to operate both of the first and second FET devices substantially at a resonant frequency at least partially defined by the resonant circuit to generate the DC output signal according to a voltage setpoint.
    Type: Application
    Filed: September 21, 2016
    Publication date: March 22, 2018
    Inventors: Pradeep Vijayan, Vishnu Mahadeva Iyer
  • Publication number: 20180041065
    Abstract: A charging pad for charging one or more receiver devices is disclosed. The charging pad includes at least one first frequency coil operable at a first frequency band. Further, the charging pad includes at least one second frequency coil operable at a second frequency band different from the first frequency band. Also, the charging pad includes an excitation unit operationally coupled to the at least one first frequency coil and the at least one second frequency coil and configured to drive the at least one first frequency coil and the at least one second frequency coil.
    Type: Application
    Filed: August 2, 2017
    Publication date: February 8, 2018
    Inventors: Pradeep VIJAYAN, Somakumar RAMACHANDRAPANICKER, Deepak ARAVIND, Arun Kumar RAGHUNATHAN, Vishnu Mahadeva IYER
  • Publication number: 20180041066
    Abstract: A charging pad for charging one or more receiver devices is disclosed. The charging pad includes at least one first resonator coil operable at a first frequency band and at least one second resonator coil operable at a second frequency band. Further, the charging pad includes at least one exciter coil magnetically coupled to the at least one first resonator coil and the at least one second resonator coil. In addition, the charging pad includes an excitation unit operationally coupled to the at least one exciter coil and configured to drive the at least one first resonator coil and the at least one second resonator coil via the at least one exciter coil.
    Type: Application
    Filed: August 3, 2017
    Publication date: February 8, 2018
    Inventors: Pradeep VIJAYAN, Somakumar RAMACHANDRAPANICKER, Deepak ARAVIND, Arun Kumar RAGHUNATHAN, VIshnu MAHADEVA IYER
  • Publication number: 20170179769
    Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanger coil configured to exchange power. The contactless power transfer system also includes a first power converter operatively coupled to the first power exchanger coil and configured to convert a direct current power to an alternating current power at a system frequency. The contactless power transfer system further includes a controller configured to control an operating state of the first power converter to vary an alternating current power provided to the first power exchanger coil at the system frequency.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 22, 2017
    Inventors: Pradeep VIJAYAN, Rajendra NAIK, Arun Kumar RAGHUNATHAN, Vishnu MAHADEVA IYER
  • Publication number: 20170141570
    Abstract: A power distribution system in operative association with a source and a plurality of loads includes a converter, a power distribution unit including a plurality of solid state power controllers and configured to provide power from converter to plurality of loads, and a fault protection unit operatively coupled to converter, power distribution unit, or both. The fault protection unit includes a sensor configured to sense current at output terminal of at least one of power distribution unit and converter and a controller configured to compare sensed current with a corresponding threshold value of current, identify presence of a fault in at least one of plurality of loads, power distribution unit, and converter based on comparison, and activate a desired protection scheme to provide fault ride through during the presence of the fault.
    Type: Application
    Filed: November 4, 2016
    Publication date: May 18, 2017
    Inventors: Pradeep VIJAYAN, Satish PRABHAKARAN, John Oliver COLLINS, Vishnu Mahadeva Iyer