With Nonexciting Saturating Means For Generator Structure Patents (Class 322/57)
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Patent number: 8432137Abstract: 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: GrantFiled: May 19, 2009Date of Patent: April 30, 2013Assignee: Hamilton Sundstrand CorporationInventors: Gregory I. Rozman, Vietson M. Nguyen, Jacek F. Gieras, Sastry V. Vedula
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Patent number: 7999431Abstract: 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: GrantFiled: April 13, 2009Date of Patent: August 16, 2011Assignee: Pratt & Whitney Canada Corp.Inventors: Kevin Allan Dooley, Joshua David Bell
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Publication number: 20100295517Abstract: 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: ApplicationFiled: May 19, 2009Publication date: November 25, 2010Inventors: Gregory I. Rozman, Vietson M. Nguyen, Jacek F. Gieras, Sastry V. Vedula
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Publication number: 20090195225Abstract: 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: ApplicationFiled: April 13, 2009Publication date: August 6, 2009Applicant: PRATT & WHITNEY CANADA CORP.Inventors: Kevin Allan Dooley, Joshua David Bell
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Publication number: 20090134849Abstract: 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: ApplicationFiled: August 14, 2006Publication date: May 28, 2009Inventor: Carlos Gottfried
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Patent number: 7501799Abstract: 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 enaType: GrantFiled: June 20, 2007Date of Patent: March 10, 2009Assignee: Hamilton Sundstrand CorporationInventors: Gregory I. Rozman, Matthew L. Wilhide, Arthur A. Pershall
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Patent number: 7439715Abstract: 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: GrantFiled: May 22, 2006Date of Patent: October 21, 2008Assignee: Hamilton Sundstrand CorporationInventors: Gregory I. Rozman, Mahesh J. Shah, Alan E. King
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Patent number: 7262539Abstract: 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: GrantFiled: November 26, 2004Date of Patent: August 28, 2007Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin Allan Dooley
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Patent number: 7239113Abstract: 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: GrantFiled: May 3, 2005Date of Patent: July 3, 2007Assignee: Caterpillar IncInventor: James P. Johnson