Patents by Inventor Adrian Engel

Adrian Engel 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).

  • Current sensorless control of a boost-type switch mode rectifier (SMR) with inductor parameter adaptation
    Patent number: 9564799
    Abstract: Boost-type switch-mode rectifiers (SMR) commonly use a resistor or a magnetic current sensor to measure the instantaneous input or inductor current that is used as the feedback to the current controller. A novel current sensorless scheme is described that computes the inductor current from the measured inductor voltage in a single-phase boost-type SMR using an adaptive low pass filter. This calculation requires an estimate of the inductance and the equivalent series resistance of the inductor coil. Both these parameters are dependent on operating conditions and are updated continuously. This is done using an adaptive model of the inductor that computes these parameters of the inductor once in every half cycle of the input current. The adaptation scheme is robust against parameter variations. Simulation and experimental results confirm the effectiveness of the proposed technique which provides comparable performance to standard measured feedback current scheme both under steady-state and transient conditions.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: February 7, 2017
    Assignee: UVic Industry Partnerships Inc.
    Inventors: Subhasis Nandi, Adrian Engel
  • CURRENT SENSORLESS CONTROL OF A BOOST-TYPE SWITCH MODE RECTIFIER (SMR) WITH INDUCTOR PARAMETER ADAPTATION
    Publication number: 20150311788
    Abstract: Boost-type switch-mode rectifiers (SMR) commonly use a resistor or a magnetic current sensor to measure the instantaneous input or inductor current that is used as the feedback to the current controller. A novel current sensorless scheme is described that computes the inductor current from the measured inductor voltage in a single-phase boost-type SMR using an adaptive low pass filter. This calculation requires an estimate of the inductance and the equivalent series resistance of the inductor coil. Both these parameters are dependent on operating conditions and are updated continuously. This is done using an adaptive model of the inductor that computes these parameters of the inductor once in every half cycle of the input current. The adaptation scheme is robust against parameter variations. Simulation and experimental results confirm the effectiveness of the proposed technique which provides comparable performance to standard measured feedback current scheme both under steady-state and transient conditions.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 29, 2015
    Inventors: Subhasis Nandi, Adrian Engel