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: 7960948Abstract: 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: GrantFiled: March 29, 2010Date of Patent: June 14, 2011Assignee: Direct Drive Systems, Inc.Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
-
Publication number: 20100244599Abstract: 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: ApplicationFiled: March 29, 2010Publication date: September 30, 2010Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
-
Patent number: 7710081Abstract: 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: GrantFiled: May 21, 2007Date of Patent: May 4, 2010Assignee: Direct Drive Systems, Inc.Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
-
Patent number: 7609024Abstract: 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: GrantFiled: May 27, 2005Date of Patent: October 27, 2009Assignee: Siemens Energy & Automation, Inc.Inventors: Raed H. Ahmad, Ekkehard Pittius
-
Patent number: 7479757Abstract: 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: GrantFiled: May 27, 2005Date of Patent: January 20, 2009Assignee: Siemens Energy & Automation, Inc.Inventor: Raed H. Ahmad
-
Patent number: 7385372Abstract: 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: GrantFiled: May 27, 2005Date of Patent: June 10, 2008Assignees: Siemens Energy & Automation, Inc., Siemens AtkiengesellschaftInventors: Raed H. Ahmad, Ekkehard Pittius
-
Publication number: 20080103632Abstract: 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: ApplicationFiled: May 21, 2007Publication date: May 1, 2008Applicant: Direct Drive Systems, Inc.Inventors: Daniel M. Saban, Raed H. Ahmad, Zhiguo Pan
-
Patent number: 7330012Abstract: 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: GrantFiled: May 27, 2005Date of Patent: February 12, 2008Assignees: Siemens Aktiengesellschaft, Siemens Energy & Automation, Inc.Inventors: Raed H. Ahmad, Ekkehard Pittius
-
Patent number: 7227273Abstract: 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: GrantFiled: May 27, 2005Date of Patent: June 5, 2007Assignee: Siemens Energy & Automation, Inc.Inventors: Raed H. Ahmad, Ekkehard Pittius