Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 322/32
Name: Electricity: single generator systems > Automatic control of generator or driving means > Speed or frequency of generator > Frequency responsive devices or networks
Description: Subject matter wherein a frequency responsive device or network is utilized to produce a control dependent on the speed of frequency for controlling the generator or driving means.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8513911 Power converters Aug. 20, 2013
8294431 Method of controlling a variable speed constant frequency generator Oct. 23, 2012
8134344 Regulation control for variable frequency generators Mar. 13, 2012
8080950 Induction motor torque control in a pumping system Dec. 20, 2011
8004250 Pyramid electric generator Aug. 23, 2011
7830127 Doubly-controlled asynchronous generator Nov. 9, 2010
7501798 Method for the active damping of the drive train in a wind energy plant Mar. 10, 2009
7215099 Method in frequency converter provided with voltage intermediate circuit, and frequency converter May. 8, 2007
7211989 Method for acceleration of a shaft run, as well as an apparatus for carrying out the method May. 1, 2007
7170262 Variable frequency power system and method of use Jan. 30, 2007
7151359 Variable reluctance generator Dec. 19, 2006
7061211 Gas turbine generating apparatus Jun. 13, 2006
7030593 Multiple path variable speed constant frequency device having automatic power path selection capability Apr. 18, 2006
6992465 Generator control circuit having alarm controller Jan. 31, 2006
6933705 Generator stator voltage control through DC chopper Aug. 23, 2005
6888263 Gas turbine generator May. 3, 2005
6882060 Turbine generating apparatus Apr. 19, 2005
6844706 Multiple path variable speed constant frequency device having automatic power path selection capability Jan. 18, 2005
6781331 Method and apparatus for regulating motor generator output Aug. 24, 2004
6700105 Induction heating system and method for internal combustion engine Mar. 2, 2004
6696675 Induction heating system for internal combustion engine Feb. 24, 2004
6628005 Single speed turbine generator for different power system output frequencies in power generation systems and associated methods Sep. 30, 2003
6628103 Power factor control apparatus and method Sep. 30, 2003
6624617 Apparatus and method for stabilizing the voltage of an AC generator with variable rotor speed Sep. 23, 2003
6603289 Vehicle alternator control device and method Aug. 5, 2003
6479971 Method for regulating a three-phase machine without a mechanical rotary transducer Nov. 12, 2002
6392371 Universal frequency electrical generator May. 21, 2002
6380734 Control element assembly position verification apparatus Apr. 30, 2002
6323625 Turbine/alternator on a common shaft with an associated electrical system Nov. 27, 2001
6323624 Procedure to connect an asynchronous generator on an alternating current and an electrical connecting for use at this procedure Nov. 27, 2001
6163078 Adjustable speed gas turbine power generation apparatus and its operation method Dec. 19, 2000
6163137 Rotary induction machine having control of secondary winding impedance Dec. 19, 2000
6124702 Step switch cycloconverter utilizing multi-tap armature Sep. 26, 2000
6118187 Method for controlling an output of an electrical power plant Sep. 12, 2000
6087753 High-efficiency inductor-alternator Jul. 11, 2000
6075348 Controller for car generator Jun. 13, 2000
6072303 Method and apparatus for compensating a line synchronous generator Jun. 6, 2000
6064186 Method for managing the excitation of an automobile alternator by means of a regulator May. 16, 2000
5986438 Rotary induction machine having control of secondary winding impedance Nov. 16, 1999
5977645 Aircraft secondary power system Nov. 2, 1999
5965949 Engine-driven generator Oct. 12, 1999
5929611 Light weight rotor and stator with multiple coil windings in thermal contact Jul. 27, 1999
5809047 Method for driving a wavelength changeable light source apparatus, such a wavelength changeable light source apparatus and an optical communication system using the same Sep. 15, 1998
5798631 Performance optimization controller and control method for doubly-fed machines Aug. 25, 1998
5777459 Induction electrical power generating system with variable numbers of poles and excitation frequency Jul. 7, 1998
5773964 Output and torque control of an automotive alternator Jun. 30, 1998
5729118 Variable speed induction generator-motor with controllable excitation frequency Mar. 17, 1998
5698968 Power system stabilizer for generator Dec. 16, 1997
5627744 Converter enhanced variable frequency power bus architecture May. 6, 1997
5581168 Starter/generator system with DC link current control Dec. 3, 1996

1 2 3

  Recently Added Patents
Compounds and their salts specific to the PPAR receptors and the EGF receptors and their use in the medical field
Organic compounds
Method and system for prioritizing points of interest for display in a map using category score
Method and apparatus for providing auto-completion of information
Technique for manufacturing bit patterned media
Categorization of design rule errors
Apparatus and method for information processing, program, and recording medium
  Randomly Featured Patents
Group III-V type nitride compound semiconductor light-emitting device
Information providing system for vehicle
Device for detecting and counting warp and weft threads in a feed device of an industrial sewing machine
Co-channel interference rejection in a digital receiver
Cache controller fault tolerant computer and data transfer system setting recovery points
Apparatus for and method of removing scrap ribbons trimmed from a carpeting strip
Sealing member for use in well shafts
Apparatus for treating materials in the form of continuous lengths
Method for the separation of intermediates which may be used for the preparation of escitalopram
High thermal conductivity diamond/non-diamond composite materials