Patents by Inventor Sesh Mohan Rao

Sesh Mohan Rao 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: 11416663
    Abstract: A system for controlling a motor with a plurality of motor control functions including at least a current control loop and a velocity control loop. The system includes one of a hybrid Digital Signal Processor (DSP)-Field Programmable Gate Array (FPGA) architecture having an integral DSP and an integral FPGA or a System on a Chip (SoC) architecture having a Microcontroller Sub-System (MSS) and an FPGA fabric. The current control loop function is assigned to the integral FPGA for the hybrid DSP-FPGA architecture, and at least the velocity control loop function is assigned to the DSP the hybrid DSP-FPGA architecture. Alternatively, the current control loop function is assigned the FPGA fabric of the SoC architecture, and at least the velocity control loop function is assigned to the MSS of the SoC architecture.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: August 16, 2022
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Ashish Vijay, Sesh Mohan Rao, Rajeeva Gopala Krishna, Shardul Shrinivas Bapat, Rajagopal Srinivasan, Manish Kumar
  • Publication number: 20210325420
    Abstract: A resolver interface system for a motor drive system includes a phase detector configured to be operatively connected to a rotation signal output of a resolver to receive a rotation signal therefrom and generate a phase difference signal. A differentiator is operatively connected to an output of the phase detector to convert the phase difference signal of the phase detector into a pulse output configured to be read by a processing system.
    Type: Application
    Filed: April 21, 2021
    Publication date: October 21, 2021
    Inventors: Sesh Mohan Rao, Ambili Raghavan
  • Patent number: 10928446
    Abstract: A method of performing a built in test on a watchdog circuit including a watchdog timer includes: initiating the built in test with a processor being monitored by the watchdog circuit, wherein initiating includes enabling a watchdog circuit built in test reset inhibit circuit (WD BIT reset inhibit circuit) connected between an output of an active watchdog integrated reset circuit connected to the processor and a reset input of the processor; and ceasing to provide a strobe signal to the active watchdog integrated reset circuit that resets a watchdog counter in the active watchdog integrated reset circuit, the active watchdog integrated reset circuit causing a reset of the processor via its output when the watchdog counter expires by providing a signal to a reset input of the processor.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: February 23, 2021
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Rajeeva Gopala Krishna, Ashish Vijay, Sesh Mohan Rao
  • Publication number: 20200225285
    Abstract: A method of performing a built in test on a watchdog circuit including a watchdog timer includes: initiating the built in test with a processor being monitored by the watchdog circuit, wherein initiating includes enabling a watchdog circuit built in test reset inhibit circuit (WD BIT reset inhibit circuit) connected between an output of an active watchdog integrated reset circuit connected to the processor and a reset input of the processor; and ceasing to provide a strobe signal to the active watchdog integrated reset circuit that resets a watchdog counter in the active watchdog integrated reset circuit, the active watchdog integrated reset circuit causing a reset of the processor via its output when the watchdog counter expires by providing a signal to a reset input of the processor.
    Type: Application
    Filed: January 30, 2019
    Publication date: July 16, 2020
    Inventors: Rajeeva Gopala KRISHNA, Ashish VIJAY, Sesh Mohan RAO
  • Publication number: 20200193078
    Abstract: A system for controlling a motor with a plurality of motor control functions including at least a current control loop and a velocity control loop. The system includes one of a hybrid Digital Signal Processor (DSP)-Field Programmable Gate Array (FPGA) architecture having an integral DSP and an integral FPGA or a System on a Chip (SoC) architecture having a Microcontroller Sub-System (MSS) and an FPGA fabric. The current control loop function is assigned to the integral FPGA for the hybrid DSP-FPGA architecture, and at least the velocity control loop function is assigned to the DSP the hybrid DSP-FPGA architecture. Alternatively, the current control loop function is assigned the FPGA fabric of the SoC architecture, and at least the velocity control loop function is assigned to the MSS of the SoC architecture.
    Type: Application
    Filed: December 11, 2019
    Publication date: June 18, 2020
    Inventors: Ashish Vijay, Sesh Mohan Rao, Rajeeva Gopala Krishna, Shardul Shrinivas Bapat, Rajagopal Srinivasan, Manish Kumar
  • Publication number: 20190370016
    Abstract: Embodiments of the invention include methods, systems and devices for implementing the auto detection of Joint Test Action Group (JTAG) debuggers/emulators. Embodiments include sending a reset signal to reset one or more slave devices, and detecting a programming signal indicating the one or more slave devices are in a programming/debugging mode. Embodiments also include responsive to the signal, inhibiting resetting one or more slave devices receiving the programming signal.
    Type: Application
    Filed: July 26, 2018
    Publication date: December 5, 2019
    Inventors: Rajeeva Gopala Krishna, Sesh Mohan Rao
  • Patent number: 10277049
    Abstract: Aspects include a hold-up capacitor charging circuit for a power supply. The hold-up capacitor charging circuit includes a voltage boosting charge pump circuit with a hold-up capacitor electrically coupled to a voltage source. The hold-up capacitor charging circuit also includes a fly-back circuit. The fly-back circuit includes a transformer with a primary winding electrically coupled to the voltage source and a secondary winding electrically coupled to a load. A switch is electrically coupled to the primary winding and the voltage boosting charge pump circuit. A controller is operable to open and close the switch to control energy transfer from the primary winding to the secondary winding and charge the hold-up capacitor responsive to voltages of the voltage source, the voltage boosting charge pump circuit, and a reflected voltage of the secondary winding at the primary winding.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: April 30, 2019
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Rodrigo Fernandez-Mattos, Priya Kakarla Naga Lakshmi, Sesh Mohan Rao, Sridhar Katakam, Somasekhar Valleru, Shobhit Agrawal
  • Patent number: 10116288
    Abstract: In accordance with one or more embodiments, a monostable multivibrator that is communicatively coupled to a host device and an external analog-to-digital converter is provided. The monostable multivibrator receives a chip select signal from the host device. The monostable multivibrator also generates, in response to the chip select signal, a conversion start signal to the external analog-to-digital converter.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: October 30, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Sesh Mohan Rao, Shobhit Agrawal, Priya Kakarla Naga Lakshmi
  • Publication number: 20180226955
    Abstract: In accordance with one or more embodiments, a monostable multivibrator that is communicatively coupled to a host device and an external analog-to-digital converter is provided. The monostable multivibrator receives a chip select signal from the host device. The monostable multivibrator also generates, in response to the chip select signal, a conversion start signal to the external analog-to-digital converter.
    Type: Application
    Filed: April 7, 2017
    Publication date: August 9, 2018
    Inventors: Sesh Mohan Rao, Shobhit Agrawal, Priya Kakarla Naga Lakshmi