Patents by Inventor Amir S. Mikhail

Amir S. Mikhail 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).

  • Extendable rotor blades for power generating wind and ocean current turbines and means for operating below set rotor torque limits
    Publication number: 20030044274
    Abstract: A wind or water flow energy converter comprising a wind or water flow actuated rotor assembly. The rotor comprises a plurality of blades, wherein the blades of are variable in length to provide a variable diameter rotor. The rotor diameter is controlled to fully extend the rotor at low flow velocity and to retract the rotor as flow velocities increases such that the loads delivered by or exerted upon said rotor do not exceed set limits.
    Type: Application
    Filed: October 25, 2001
    Publication date: March 6, 2003
    Inventors: Geoffrey F. Deane, Amir S. Mikhail
  • Variable speed wind turbine generator
    Publication number: 20020105189
    Abstract: A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
    Type: Application
    Filed: February 5, 2002
    Publication date: August 8, 2002
    Inventors: Amir S. Mikhail, Craig L. Christenson, Kevin L. Cousineau, William L. Erdman, William E. Holley
  • Variable speed wind turbine generator
    Patent number: 6420795
    Abstract: A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: July 16, 2002
    Assignee: Zond Energy Systems, Inc.
    Inventors: Amir S. Mikhail, Craig L. Christenson, Kevin L. Cousineau, William L. Erdman, William E. Holley
  • Variable speed wind turbine generator
    Patent number: 6137187
    Abstract: A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: October 24, 2000
    Assignee: Zond Energy Systems, Inc.
    Inventors: Amir S. Mikhail, Craig L. Christenson, Kevin L. Cousineau, William L. Erdman, William E. Holley