Induction static start for a turbine generator with a brushless exciter and associated methods

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6285089
SERIAL NO

09448653

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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In an electric power generation system (20) which includes a turbine (22) and a turbine generator (25) connected to the turbine (22) along a common shaft (21), an alternating current (AC) induction exciter (30) is provided which is connected to the turbine generator (25) for starting the turbine generator (25). The AC induction exciter (30) preferably includes an AC input (31), an exciter rotor (36), and a stationary alternating current output provider (35) responsive to the AC input (31) and positioned in electrical communication with the exciter rotor (36) for providing an alternating current output (34) to the exciter rotor (36) so that a voltage is generated regardless of the speed of the exciter rotor (36). The stationary alternating current provider (35) preferably includes a rectifier (32) responsive to the AC input (31) for rectifying the alternating current to a direct current (DC) and a DC-to-AC converter (33) responsive to the rectifier (32) for converting the direct current input to an alternating current output (34). A method of starting a turbine generator (25) is also provided.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SIEMENS ENERGY, INC.ORLANDO, FL1777

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nelson, Robert J Lake Mary, FL 92 2603

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Westinghouse Electric Corp. (1)
5873238 Startup cooling steam generator for combustion turbine 11 1996
 
ALLIEDSIGNAL INC. (1)
* 5406189 Low input harmonic induced multiple use AC synchronous generator starter converter 11 1992
 
DOS SANTOS DA PONTE, MANUEL (1)
* 6175217 Hybrid generator apparatus 130 1999
 
POWERMATE CORPORATION (1)
* 6144190 Energy conversion system employing stabilized half-bridge inverter 19 1999
 
Sundstrand Corporation (7)
* 5097195 AC exciter for VSCF starter/generator 52 1989
* 5055764 Low voltage aircraft engine starting system 68 1989
* 5068590 Brushless generator having AC excitation in generating and starting modes 73 1989
* 5594322 Starter/generator system with variable-frequency exciter control 123 1993
5512811 Starter/generator system having multivoltage generation capability 80 1994
* 5581168 Starter/generator system with DC link current control 61 1994
* 5920162 Position control using variable exciter feed through 38 1996
 
STATE OF OREGON ACTING BY AND THROUGH THE STATE BOARD OF HIGHER EDUCATION ON BEHALF OF OREGON STATE UNIVERSITY (1)
* 4994684 Doubly fed generator variable speed generation control system 126 1989
 
HITACHI, LTD. (1)
5675188 Adjustable speed gas turbine power generation apparatus and its operation method independent of ambient temperature 4 1994
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (2)
7150090 Method for matching a collector to replace a brushless exciter in a turbine generator drive train 1 2004
* 2006/0012,345 System and method for matching a collector to replace a brushless exciter in a turbine generator drive train 1 2004
 
HAMILTON SUNDSTRAND CORPORATION (5)
6836086 Controlled starting system for a gas turbine engine 26 2002
7253535 Electrical starter generator system for a gas turbine engine 20 2005
* 2007/0132,245 ELECTRICAL STARTER GENERATOR SYSTEM FOR A GAS TURBINE ENGINE 3 2005
* 8575900 Rotor based air gap heating for air driven turbine 4 2010
* 2012/0056,601 ROTOR BASED AIR GAP HEATING FOR AIR DRIVEN TURBINE 2 2010
 
DASSAULT AVIATION (1)
* 6486639 Method of controlling a stand-alone electrical generator, in particular for aircraft 21 2000
 
HONEYWELL INTERNATIONAL INC. (1)
* 2003/0164,651 Generator with improved lubrication and cooling system 5 2002
 
SIEMENS ENERGY, INC. (4)
6762512 Methods for starting a combustion turbine and combustion turbine generator configured to implement same methods 7 2002
7449795 Electric power generation system using a permanent magnet dynamoelectric machine for starting a combustion turbine and for generating uninterruptible excitation power 5 2005
7692414 Regenerative static excitation system for superconducting rotor 0 2007
* 2008/0309,296 Regenerative static excitation system for superconducting rotor 1 2007
 
HITACHI, LTD. (2)
* 6684639 Combustion turbine power generation system and method of controlling the same 3 2002
* 6834502 Combustion turbine power generation system and method of controlling the same 2 2003
* Cited By Examiner