Patents by Inventor Marv M. Hamdan

Marv M. Hamdan 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).

  • Robust PID control for BLDC motor controller
    Patent number: 8308441
    Abstract: When controlling an air compressor (13) for a pneumatic braking system on a large hybrid commercial vehicle (e.g., a bus, a package delivery truck, etc.), PID control of an air compressor motor (12) is employed during normal system operation such as when the motor shaft is spinning, and state machine control is employed during startup or upon a system disturbance such as a shaft seizure or stall. In this manner, stalling events that occurs due to PID control inability to correct for unexpected disturbances are mitigated by employing state machine control.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: November 13, 2012
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventors: Marv M. Hamdan, David J. Pfefferl
  • ROBUST PID CONTROL FOR BLDC MOTOR CONTROLLER
    Publication number: 20100111707
    Abstract: When controlling an air compressor (13) for a pneumatic braking system on a large hybrid commercial vehicle (e.g., a bus, a package delivery truck, etc.), PID control of an air compressor motor (12) is employed during normal system operation such as when the motor shaft is spinning, and state machine control is employed during startup or upon a system disturbance such as a shaft seizure or stall. In this manner, stalling events that occurs due to PID control inability to correct for unexpected disturbances are mitigated by employing state machine control.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 6, 2010
    Applicant: BENDIX COMMERCIAL VEHICLE SYSTEMS, LLC
    Inventors: Marv M. HAMDAN, David J. Pfefferl
  • System and method for detecting alternator condition
    Patent number: 6862504
    Abstract: A system and method for detecting alternator condition is provided. Information is taken from the vehicle powerline and the communication links, and processed by the vehicle ECU, such as the vehicle antilocking brake system ECU, to obtain data. The battery voltage ripple amplitude is then calculated and compared at different engine speeds. If the difference in the ripple amplitude at the different engine speeds is greater than a predetermined threshold value, a signal is sent indicating that the alternator has failed.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: March 1, 2005
    Inventors: Marv M. Hamdan, Gusztav Holler, Kenneth A. Grolle, Joseph M. Macnamara, Kirit A. Thakkar
  • System and method for detecting alternator condition
    Publication number: 20040049361
    Abstract: A system and method for detecting alternator condition is provided. Information is taken from the vehicle powerline and the communication links, and processed by the vehicle ECU, such as the vehicle antilocking brake system ECU, to obtain data. The battery voltage ripple amplitude is then calculated and compared at different engine speeds. If the difference in the ripple amplitude at the different engine speeds is greater than a predetermined threshold value, a signal is sent indicating that the alternator has failed.
    Type: Application
    Filed: September 10, 2002
    Publication date: March 11, 2004
    Inventors: Marv M. Hamdan, Gusztav Holler, Kenneth A. Grolle, Joseph M. Macnamara, Kirit A. Thakkar