Patents by Inventor JOGENDRA S. THONGAM

JOGENDRA S. THONGAM 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).

  • Variable voltage converter modulation obtaining lower minimum boost ratio
    Patent number: 10576828
    Abstract: A variable voltage converter for an electric drive system has upper and lower switching devices in series between positive and negative buses. An inductance couples a junction between the switching devices to a DC battery. A controller is configured to drive the switches according to PWM gate signals based on an expected boost ratio of the converter. The PWM gate signals have a nominal dead-time insertion for both the upper and lower switching devices when the expected boost ratio is greater than a predetermined boost ratio. In order to extend a range of achievable boost ratios during regeneration operation, the PWM gate signals are without dead-time insertion for the upper switching device and the lower switching device remains continuously off when the expected boost ratio is less than the predetermined boost ratio.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: March 3, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Jogendra S. Thongam, Shuitao Yang, Mohammed Khorshed Alam, Lihua Chen, Fan Xu, Yan Zhou
  • VARIABLE VOLTAGE CONVERTER MODULATION OBTAINING LOWER MINIMUM BOOST RATIO
    Publication number: 20180198401
    Abstract: A variable voltage converter for an electric drive system has upper and lower switching devices in series between positive and negative buses. An inductance couples a junction between the switching devices to a DC battery. A controller is configured to drive the switches according to PWM gate signals based on an expected boost ratio of the converter. The PWM gate signals have a nominal dead-time insertion for both the upper and lower switching devices when the expected boost ratio is greater than a predetermined boost ratio. In order to extend a range of achievable boost ratios during regeneration operation, the PWM gate signals are without dead-time insertion for the upper switching device and the lower switching device remains continuously off when the expected boost ratio is less than the predetermined boost ratio.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Inventors: JOGENDRA S. THONGAM, SHUITAO YANG, MOHAMMED KHORSHED ALAM, LIHUA CHEN, FAN XU, YAN ZHOU