With Nonexciting Saturating Means For Generator Structure Patents (Class 322/57)
  • Patent number: 8432137
    Abstract: A method for generating and controlling power by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a desired non-HFAC power output; sensing desired power output parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the desired power output.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 30, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Vietson M. Nguyen, Jacek F. Gieras, Sastry V. Vedula
  • Patent number: 7999431
    Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 16, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin Allan Dooley, Joshua David Bell
  • Publication number: 20100295517
    Abstract: A method for generating and controlling power by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a desired non-HFAC power output; sensing desired power output parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the desired power output.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 25, 2010
    Inventors: Gregory I. Rozman, Vietson M. Nguyen, Jacek F. Gieras, Sastry V. Vedula
  • Publication number: 20090195225
    Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.
    Type: Application
    Filed: April 13, 2009
    Publication date: August 6, 2009
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventors: Kevin Allan Dooley, Joshua David Bell
  • Publication number: 20090134849
    Abstract: An alternating current generator comprising: permanent magnet means for generating a rotating magnetic field; armature means for containing at least two field windings adjacent to said permanent magnetic field and within said rotating magnetic field; a primary winding said armature means, said primary winding being of connection to a load; and a secondary winding offset from said primary winding on said armature, said secondary winding being connected to a capacitive load.
    Type: Application
    Filed: August 14, 2006
    Publication date: May 28, 2009
    Inventor: Carlos Gottfried
  • Patent number: 7501799
    Abstract: An electromechanical power transfer system that transfers power between a direct current (DC) electrical power system and a prime mover, comprises: a permanent magnet machine (PMM) comprising a permanent magnet (PM) rotor that rotates a drive shaft of the prime mover, a stator and a control coil; that an inverter/rectifier system for converting DC power from the DC power system to multiphase alternating current (AC) power on an AC bus; a control coil current regulator system for regulating current through the control coil; wherein the inverter/rectifier system responds to a position reference signal, a current load feedback signal and a current load reference signal to regulate acceleration of the PMM; wherein the control coil current regulator system responds to a control coil current reference signal and a control coil current feedback signal to regulate current in the PMM; and wherein the power transfer system starts in an open loop mode, and the first and second speed switches respond to a closed loop ena
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: March 10, 2009
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Matthew L. Wilhide, Arthur A. Pershall
  • Patent number: 7439715
    Abstract: A power generating system provides high voltage AC power and low voltage DC power using a single generator. The generator includes a rotor and a stator that is wound with a first winding and a second winding. The first winding has a greater number of turns than the second winding and generates high voltage AC power in response to the rotating magnetic field created by the rotor. The second winding generates low voltage AC power in response to the rotating magnetic field created by the rotor. The low voltage AC power is converted to low voltage DC power by a rectifier. The low voltage DC power is further controlled by a DC-DC converter to generate controlled DC power. A controller monitors the DC power generated by the DC-DC converter, and generates pulse width modulation signals that are provided to the DC-DC converter, selectively increasing or decreasing the controlled DC power provided by the DC-DC converter.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: October 21, 2008
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Mahesh J. Shah, Alan E. King
  • Patent number: 7262539
    Abstract: The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits, one of which includes a saturable portion in which saturation may be controlled to permit control of the machine.
    Type: Grant
    Filed: November 26, 2004
    Date of Patent: August 28, 2007
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Patent number: 7239113
    Abstract: An electrical power generation system is provided, and a method of reducing undesired currents therein. The method includes the steps of delivering current via at least one variable frequency switching means, and adjusting a switching frequency of the at least one variable frequency switching means based on the power output of the system. The system may further include an electronic controller having a control algorithm recorded thereon, the control algorithm including means for adjusting the variable frequency switching means based on a power output of the system.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: July 3, 2007
    Assignee: Caterpillar Inc
    Inventor: James P. Johnson