Patents by Inventor Thayalan Shanmugam

Thayalan Shanmugam 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).

  • Controller and a method to drive an inverter circuit for a permanent-magnet synchronous motor
    Patent number: 10110154
    Abstract: A controller is provided to drive an inverter circuit for a PMSM. The inverter circuit is connected to a battery through a DC link capacitor, and is driven in one safe state during a fault condition. The controller monitors at least one parameter with respective threshold value to drive the inverter circuit in one safe state comprising an active Short Circuit (SC) and a Freewheel (FW). While in FW state, the controller switches from the FW state to the SC state if the at least one parameter is above the respective threshold. While in SC state, the controller controls engine speed to bring the PMSM to a predetermined speed when the stator temperature is more than a threshold temperature value. The controller switches from the SC state to the FW state.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: October 23, 2018
    Assignees: Robert Bosch GmbH, Robert Bosch Engineering and Business Solutions Private Limited
    Inventors: Hariprasad Baburajan, Thayalan Shanmugam
  • Controller and a Method to Drive an Inverter Circuit for a Permanent-Magnet Synchronous Motor
    Publication number: 20170353140
    Abstract: A controller is provided to drive an inverter circuit for a PMSM. The inverter circuit is connected to a battery through a DC link capacitor, and is driven in one safe state during a fault condition. The controller monitors at least one parameter with respective threshold value to drive the inverter circuit in one safe state comprising an active Short Circuit (SC) and a Freewheel (FW). While in FW state, the controller switches from the FW state to the SC state if the at least one parameter is above the respective threshold. While in SC state, the controller controls engine speed to bring the PMSM to a predetermined speed when the stator temperature is more than a threshold temperature value. The controller switches from the SC state to the FW state.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 7, 2017
    Inventors: Hariprasad Baburajan, Thayalan Shanmugam