Patents by Inventor Ahmad Arshan Khan

Ahmad Arshan Khan 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).

  • Control techniques for an interior permanent magnet synchronous motor of an electrified vehicle
    Patent number: 9312800
    Abstract: A system and method for controlling an interior permanent magnet synchronous motor (IPMSM) are presented. In an exemplary implementation, phase current ripple estimation techniques are utilized for variable frequency switching pulse-width modulation control of the IPMSM. In one implementation, the method includes controlling a three-phase inverter based on an initial switching frequency to generate a three-phase alternating current (AC) voltage for the IPMSM. Transformed voltages are determined in a rotating reference frame based on the three-phase AC voltage in the stationary reference frame. Current ripples are determined in the rotating reference frame based on the transformed voltages. Phase current ripples are determined in the stationary reference frame based on the current ripples in the rotating reference frame. A modified switching frequency for the three-phase inverter is determined based on the initial switching frequency and the phase current ripples.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: April 12, 2016
    Assignees: FCA US LLC, Kettering University
    Inventors: Ahmad Arshan Khan, Young Joo Lee, Bing Cheng, Hua Bai, Fei Yang, Allan Taylor
  • CONTROL TECHNIQUES FOR AN INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR OF AN ELECTRIFIED VEHICLE
    Publication number: 20160056744
    Abstract: A system and method for controlling an interior permanent magnet synchronous motor (IPMSM) are presented. In an exemplary implementation, phase current ripple estimation techniques are utilized for variable frequency switching pulse-width modulation control of the IPMSM. In one implementation, the method includes controlling a three-phase inverter based on an initial switching frequency to generate a three-phase alternating current (AC) voltage for the IPMSM. Transformed voltages are determined in a rotating reference frame based on the three-phase AC voltage in the stationary reference frame. Current ripples are determined in the rotating reference frame based on the transformed voltages. Phase current ripples are determined in the stationary reference frame based on the current ripples in the rotating reference frame. A modified switching frequency for the three-phase inverter is determined based on the initial switching frequency and the phase current ripples.
    Type: Application
    Filed: August 25, 2014
    Publication date: February 25, 2016
    Inventors: Ahmad Arshan Khan, Young Joo Lee, Bing Cheng, Hua Bai, Fei Yang, Allan Taylor