Patents by Inventor Claude Khalizadeh
Claude Khalizadeh 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: 7489100Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: GrantFiled: December 21, 2006Date of Patent: February 10, 2009Inventors: Heath F. Hofmann, Claude Khalizadeh
-
Publication number: 20080150469Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: ApplicationFiled: December 21, 2006Publication date: June 26, 2008Inventors: Heath F. Hofmann, Claude Khalizadeh
-
Publication number: 20070114795Abstract: The present invention provides a flywheel system with a variable speed synchronous reluctance motor-generator and a variable speed permanent magnet generator for providing backup power. The flywheel system incorporates rotating elements supported by electromagnetic bearings. Electric power provided by the backup generator maintains electromagnetic bearing operation during that portion of the coast down period when shaft speed falls below the minimum required for operation of the synchronous reluctance motor-generator.Type: ApplicationFiled: January 17, 2007Publication date: May 24, 2007Inventor: Claude Khalizadeh
-
Patent number: 7187087Abstract: A flywheel system incorporates a variable speed synchronous reluctance motor-generator and a variable speed permanent magnet generator for providing backup power. Rotating elements are supported by electromagnetic bearings and electric power provided by the backup generator maintains electromagnetic bearing operation during that portion of a coast down period when shaft speed falls below the minimum speed required for operation of the synchronous reluctance motor-generator.Type: GrantFiled: October 14, 2005Date of Patent: March 6, 2007Assignee: Pentadyne Power CorporationInventor: Claude Khalizadeh
-
Patent number: 7170255Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: GrantFiled: November 30, 2005Date of Patent: January 30, 2007Assignee: Pentadyna Power CorporationInventors: Heath F. Hofmann, Claude Khalizadeh
-
Patent number: 7109622Abstract: The present invention provides a flywheel system with a variable speed synchronous reluctance motor-generator and a variable speed permanent magnet generator for providing backup power. The flywheel system incorporates rotating elements supported by electromagnetic bearings. Electric power provided by the backup generator maintains electromagnetic bearing operation during that portion of the coast down period when shaft speed falls below the minimum required for operation of the synchronous reluctance motor-generator.Type: GrantFiled: June 7, 2004Date of Patent: September 19, 2006Assignee: Pentadyne Power CorporationInventor: Claude Khalizadeh
-
Patent number: 7078876Abstract: The present invention provides an electromechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: GrantFiled: July 7, 2004Date of Patent: July 18, 2006Assignee: Pentadyne Power CorporationInventors: Heath F. Hofmann, Claude Khalizadeh
-
Publication number: 20060076919Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: ApplicationFiled: November 30, 2005Publication date: April 13, 2006Inventors: Heath Hofmann, Claude Khalizadeh
-
Publication number: 20060038453Abstract: The present invention provides a flywheel system with a variable speed synchronous reluctance motor-generator and a variable speed permanent magnet generator for providing backup power. The flywheel system incorporates rotating elements supported by electromagnetic bearings. Electric power provided by the backup generator maintains electromagnetic bearing operation during that portion of the coast down period when shaft speed falls below the minimum required for operation of the synchronous reluctance motor-generator.Type: ApplicationFiled: October 14, 2005Publication date: February 23, 2006Inventor: Claude Khalizadeh
-
Publication number: 20050007061Abstract: The present invention provides an electromechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.Type: ApplicationFiled: July 7, 2004Publication date: January 13, 2005Inventors: Heath Hofmann, Claude Khalizadeh
-
Publication number: 20040245877Abstract: The present invention provides a flywheel system with a variable speed synchronous reluctance motor-generator and a variable speed permanent magnet generator for providing backup power. The flywheel system incorporates rotating elements supported by electromagnetic bearings. Electric power provided by the backup generator maintains electromagnetic bearing operation during that portion of the coast down period when shaft speed falls below the minimum required for operation of the synchronous reluctance motor-generator.Type: ApplicationFiled: June 7, 2004Publication date: December 9, 2004Inventor: Claude Khalizadeh
-
Patent number: 6812587Abstract: A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC bus architecture permits bi-directional power flow among interconnected elements.Type: GrantFiled: November 21, 2002Date of Patent: November 2, 2004Assignee: Capstone Turbine CorporationInventors: Mark G. Gilbreth, Everett R. Geis, Claude Khalizadeh, David McShane, Joel B. Wacknov, Simon R. Wall
-
Publication number: 20030111842Abstract: A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC bus architecture permits bi-directional power flow among interconnected elements.Type: ApplicationFiled: November 21, 2002Publication date: June 19, 2003Applicant: Capstone Turbine CorporationInventors: Mark G. Gilbreth, Everett R. Geis, Claude Khalizadeh, David McShane, Joel B. Wacknov, Simon R. Wall
-
Publication number: 20030015873Abstract: A power generation system includes a turbogenerator having a motor/generator and a turbine coupled to a common shaft, and generates AC power. A first power converter is coupled to the turbogenerator and a DC bus and converts the AC power to DC power on the DC bus. A second power converter is coupled to the DC bus and is couple-able to a load. The second power converter converts the DC power on the DC bus to an output power for coupling to the load. Also coupled to the DC bus are a battery and a capacitor to stabilize a DC voltage on the DC bus during load changes. The power generation system further includes a power controller coupled to the turbogenerator and the first and second power converters. The power controller regulates a speed of the turbine, independent of the DC voltage on the DC bus.Type: ApplicationFiled: January 10, 2002Publication date: January 23, 2003Inventors: Claude Khalizadeh, Wacknov Joel
-
Publication number: 20020149206Abstract: A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC bus architecture permits bi-directional power flow among interconnected elements.Type: ApplicationFiled: February 5, 2002Publication date: October 17, 2002Inventors: Mark G. Gilbreth, Everett Geis, Claude Khalizadeh, David McShane, Joel Wacknov, Simon Wall
-
Patent number: 5998899Abstract: A bearing system for positioning and supporting a rotor having a vertical shaft (20) coincident with a main rotation axis included in a flywheel (10) used for energy storage and high surge power in vehicular applications. The bearing system includes upper and lower radial force generators (110, 210) containing only electromagnets, and upper and lower axial force generators (120, 220) including an electromagnet and a permanent magnet. According to one aspect of the bearing system, each of the bearings includes control circuitry having simple and complex lead networks so as to permit the force generators to rapidly respond to vehicular transients while maintaining a preferred bearing stiffness. The bearing system also includes upper and lower touchdown ball bearings (130, 230) which are engaged only when the radial force generators are unable to maintain the rotor in a predetermined cylindrical volume within the flywheel (10).Type: GrantFiled: November 20, 1997Date of Patent: December 7, 1999Assignee: Rosen Motors L.P.Inventors: Harold A. Rosen, Claude Khalizadeh, Scott B. Pano, Joseph J. Kubicky, Seymour N. Rubin
-
Patent number: 5864303Abstract: A capacitive sensor system for an active magnetic bearing supporting a rotating shaft and flywheel in a flywheel energy storage system integrates sensor elements into the bearing stators, thereby conserving valuable space within a vacuum housing enclosing the flywheel energy storage system. High frequency resonant processing provides intrinsic linearity and noise immunity while permitting fast response times. Simple design of the sensor system permits all sensor electronics to be readily packaged within the vacuum housing.Type: GrantFiled: June 14, 1996Date of Patent: January 26, 1999Assignee: Rosen Motors L.P.Inventors: Harold A. Rosen, Claude Khalizadeh
-
Patent number: 5708312Abstract: A bearing system for positioning and supporting a rotor having a vertical shaft coincident with a main rotation axis included in a flywheel used for energy storage and high surge power in vehicular applications includes first and second radial force generators disposed in a first plane perpendicular to the rotation axis of the rotor, the first and second force generators including only electromagnets, third and fourth radial force generators disposed in a second plane perpendicular to the rotation axis of the rotor, the third and fourth force generators including only electromagnets, and upper and lower axial force generators each containing an electromagnet and a permanent magnet. According to one aspect of the bearing system, each of the force generators includes control circuitry having simple and complex lead networks so as to permit the force generators to rapidly respond to vehicular transients while maintaining a desired bearing stiffness.Type: GrantFiled: November 19, 1996Date of Patent: January 13, 1998Assignee: Rosen Motors, L.P.Inventors: Harold A. Rosen, Claude Khalizadeh, Scott B. Pano, Joseph J. Kubicky, Seymour N. Rubin