Patents by Inventor Kanikesh Yedla

Kanikesh Yedla 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).

  • Phase loss detection in active front end converters
    Patent number: 10263558
    Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: April 16, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Ahmed Mohamed Sayed Ahmed, Kanikesh Yedla, Zhenyu Ye, Prathamesh R. Vadhavkar
  • PHASE LOSS DETECTION IN ACTIVE FRONT END CONVERTERS
    Publication number: 20170272023
    Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 21, 2017
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Ahmed Mohamed Sayed Ahmed, Kanikesh Yedla, Zhenyu Ye, Prathamesh R. Vadhavkar