Patents by Inventor Rashmi Prasad

Rashmi Prasad 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: 9973028
    Abstract: A charging system for use in providing power for charging a battery. The system includes a first, alternating-current-to-direct-current, stage and a second, direct-current-to-direct-current, stage. The first stage includes a single-phase diode rectifier for rectifying an input alternating-current input voltage, and a power-factor-correcting sub-circuit including a switch. The second stage includes multiple switches. The system further includes a high-frequency capacitor connected between the first stage and the second stage. The system also includes a controller connected to the switches of the first and second stages and configured to control, by way of the switches, timing of boost inductor current passing through the charging system.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 15, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Chandra S. Namuduri, Rashmi Prasad
  • Publication number: 20180050686
    Abstract: A hybrid vehicle propulsion includes an engine and a first electric machine, where each is configured to selectively provide torque to propel the vehicle. The propulsion system also includes a second electric machine coupled to the engine to provide torque to start the engine from an inactive state. A high-voltage power source is configured to power both of the first electric machine and the second electric machine over a high-voltage bus. The propulsion system further includes a controller programmed to deactivate the engine and propel the vehicle using the first electric machine in response to the vehicle being driven at a steady-state speed for a predetermined duration of time. The controller is also programmed to restart the engine using the second electric machine powered by the high-voltage power source.
    Type: Application
    Filed: August 17, 2016
    Publication date: February 22, 2018
    Inventors: Venkata Prasad Atluri, Norman K. Bucknor, Robert S. Conell, Suresh Gopalakrishnan, Lei Hao, Chunhao J. Lee, Derek F. Lahr, Dongxu Li, Shifang Li, Chandra S. Namuduri, Thomas W. Nehl, Avoki M. Omekanda, Bob R. Powell, JR., Rashmi Prasad, Farzad Samie, Neeraj S. Shidore, Aaron M. Sullivan
  • Publication number: 20160105056
    Abstract: A charging system for use in providing power for charging a battery. The system includes a first, alternating-current-to-direct-current, stage and a second, direct-current-to-direct-current, stage. The first stage includes a single-phase diode rectifier for rectifying an input alternating-current input voltage, and a power-factor-correcting sub-circuit including a switch. The second stage includes multiple switches. The system further includes a high-frequency capacitor connected between the first stage and the second stage. The system also includes a controller connected to the switches of the first and second stages and configured to control, by way of the switches, timing of boost inductor current passing through the charging system.
    Type: Application
    Filed: June 23, 2014
    Publication date: April 14, 2016
    Inventors: Chandra S. Namurdri, Rashmi Prasad