Patents by Inventor Lakshmi Narayana Sharma Tejomurtula

Lakshmi Narayana Sharma Tejomurtula 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).

  • Using interrupt to avoid short pulse in center aligned PWM
    Patent number: 10958198
    Abstract: A system includes an electric motor, at least one pair of high side and low side switches connected to the electric motor, and a microcontroller connected to the high side and low side switches. At least the low side switches have a minimum on-time requirement. The microcontroller controls the switches by outputting a pulse-width modulation (PWM) signal. At least the PWM signal outputted to the low side switch is center-aligned to the off-time. When a request is made to the microcontroller resulting in a low side on-time of zero with a previous duty cycle request that is greater than a predetermined threshold, the microcontroller is constructed and arranged to extend the duty cycle of the low side switch of the at least one pair of switches into the next period to a duration of the required minimum on-time.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: March 23, 2021
    Assignee: Vitesco Technologies USA, LLC
    Inventors: Benjamin J. Erickson, Lakshmi Narayana Sharma Tejomurtula
  • Using Interrupt To Avoid Short Pulse In Center Aligned PWM
    Publication number: 20200119672
    Abstract: A system includes an electric motor, at least one pair of high side and low side switches connected to the electric motor, and a microcontroller connected to the high side and low side switches. At least the low side switches have a minimum on-time requirement. The microcontroller controls the switches by outputting a pulse-width modulation (PWM) signal. At least the PWM signal outputted to the low side switch is center-aligned to the off-time. When a request is made to the microcontroller resulting in a low side on-time of zero with a previous duty cycle request that is greater than a predetermined threshold, the microcontroller is constructed and arranged to extend the duty cycle of the low side switch of the at least one pair of switches into the next period to a duration of the required minimum on-time.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 16, 2020
    Applicant: Vitesco Technologies USA, LLC
    Inventors: Binjamin J. Erickson, Lakshmi Narayana Sharma Tejomurtula