Patents by Inventor Raed H. Ahmad

Raed H. Ahmad 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).

  • Patent number: 7960948
    Abstract: An exemplary power system may include an electric machine with multiple sets of stator windings, each set of windings being coupled through a separate switch matrix to a common voltage bus, and each of which may be spatially arranged in full pitch around the stator such that stator flux harmonics are substantially reduced. The reduced stator flux harmonics may be associated with phase current harmonic content. In an example application, such power systems may operate in a generating mode to transfer mechanical energy to electrical energy on a DC voltage bus. In some illustrative embodiments, the power system may provide both high-power and high-speed (e.g., 1 MW at 8000 rpm or above) motoring and/or generating capability suitable, for example, for on-board (e.g., marine, aviation, traction) power systems.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: June 14, 2011
    Assignee: Direct Drive Systems, Inc.
    Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
  • Publication number: 20100244599
    Abstract: An exemplary power system may include an electric machine with multiple sets of stator windings, each set of windings being coupled through a separate switch matrix to a common voltage bus, and each of which may be spatially arranged in full pitch around the stator such that stator flux harmonics are substantially reduced. The reduced stator flux harmonics may be associated with phase current harmonic content. In an example application, such power systems may operate in a generating mode to transfer mechanical energy to electrical energy on a DC voltage bus. In some illustrative embodiments, the power system may provide both high-power and high-speed (e.g., 1MW at 8000 rpm or above) motoring and/or generating capability suitable, for example, for on-board (e.g., marine, aviation, traction) power systems.
    Type: Application
    Filed: March 29, 2010
    Publication date: September 30, 2010
    Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
  • Patent number: 7710081
    Abstract: An exemplary power system may include an electric machine with multiple sets of stator windings, each set of windings being coupled through a separate switch matrix to a common voltage bus, and each of which may be spatially arranged in full pitch around the stator such that stator flux harmonics are substantially reduced. The reduced stator flux harmonics may be associated with phase current harmonic content. In an example application, such power systems may operate in a generating mode to transfer mechanical energy to electrical energy on a DC voltage bus. In some illustrative embodiments, the power system may provide both high-power and high-speed (e.g., 1 MW at 8000 rpm or above) motoring and/or generating capability suitable, for example, for on-board (e.g., marine, aviation, traction) power systems.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: May 4, 2010
    Assignee: Direct Drive Systems, Inc.
    Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
  • Patent number: 7609024
    Abstract: Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: October 27, 2009
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Raed H. Ahmad, Ekkehard Pittius
  • Patent number: 7479757
    Abstract: Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: January 20, 2009
    Assignee: Siemens Energy & Automation, Inc.
    Inventor: Raed H. Ahmad
  • Patent number: 7385372
    Abstract: Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: June 10, 2008
    Assignees: Siemens Energy & Automation, Inc., Siemens Atkiengesellschaft
    Inventors: Raed H. Ahmad, Ekkehard Pittius
  • Publication number: 20080103632
    Abstract: An exemplary power system may include an electric machine with multiple sets of stator windings, each set of windings being coupled through a separate switch matrix to a common voltage bus, and each of which may be spatially arranged in full pitch around the stator such that stator flux harmonics are substantially reduced. The reduced stator flux harmonics may be associated with phase current harmonic content. In an example application, such power systems may operate in a generating mode to transfer mechanical energy to electrical energy on a DC voltage bus. In some illustrative embodiments, the power system may provide both high-power and high-speed (e.g., 1 MW at 8000 rpm or above) motoring and/or generating capability suitable, for example, for on-board (e.g., marine, aviation, traction) power systems.
    Type: Application
    Filed: May 21, 2007
    Publication date: May 1, 2008
    Applicant: Direct Drive Systems, Inc.
    Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
  • Patent number: 7330012
    Abstract: Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC power. The system can comprise an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can comprise a system and method for dissipating excess energy from a machine.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: February 12, 2008
    Assignees: Siemens Aktiengesellschaft, Siemens Energy & Automation, Inc.
    Inventors: Raed H. Ahmad, Ekkehard Pittius
  • Patent number: 7227273
    Abstract: Certain exemplary embodiments can include a system comprising an electric drive system for a machine. The system can include a rectifier adapted to convert AC power from an alternator to DC power. The system can include an inverter adapted to receive DC power from the rectifier and provide power to a traction motor and/or auxiliary devices. Certain exemplary embodiments can include a system and method for dissipating excess energy from a machine.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: June 5, 2007
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Raed H. Ahmad, Ekkehard Pittius