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Class Information
Number: 322/61
Name: Electricity: single generator systems > Generator control > With excitation winding and/or circuit control > Alternating current excitation
Description: Subject matter wherein the current supplied to the excitation circuit is alternating current.

Patents under this class:

Patent Number Title Of Patent Date Issued
8097968 Position-controlled start from the AC line using a synchronous machine Jan. 17, 2012
7990115 High frequency generator without rotating diode rectifier Aug. 2, 2011
7969123 Exciter assemblies Jun. 28, 2011
7518344 Method and damping device for damping a torsional vibration in a rotating drivetrain Apr. 14, 2009
7400117 Generating system with a regulated permanent magnet machine and an active rectifier Jul. 15, 2008
7368892 Method and apparatus for controlling power generation using gradually exciting technique May. 6, 2008
7292012 Control method of generator Nov. 6, 2007
7227338 Fixed frequency electrical generation system with induction coupler and use thereof in an aircraft Jun. 5, 2007
7122993 Regulated voltage control override Oct. 17, 2006
6900618 Power generation control apparatus for vehicle May. 31, 2005
6486639 Method of controlling a stand-alone electrical generator, in particular for aircraft Nov. 26, 2002
6208120 Excitation control system for rotating electrical apparatus Mar. 27, 2001
6188204 Brushless AC field system for stable frequency variable speed alternators Feb. 13, 2001
6049196 Generator for internal combustion engine Apr. 11, 2000
5453901 Detection and protection of excitation system from diode failure Sep. 26, 1995
5068590 Brushless generator having AC excitation in generating and starting modes Nov. 26, 1991
RE32857 Brushless tachometer/synchro Feb. 7, 1989
4743777 Starter generator system with two stator exciter windings May. 10, 1988
4605889 Brushless tachometer/synchro Aug. 12, 1986
4510433 Variable-speed constant-frequency alternator Apr. 9, 1985
4472673 Rotating electric machine with speed/frequency control Sep. 18, 1984
4467267 Alternator excitation system Aug. 21, 1984
4454464 Pulsar rotor system and coil winding Jun. 12, 1984
4408152 Single phase, self-regulated alternator Oct. 4, 1983
4305001 Constant frequency alternator Dec. 8, 1981
4177414 Controllable voltage A.C. generator system Dec. 4, 1979
4079307 Alternating current generating device Mar. 14, 1978

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