US Patent No: 6,285,089

Number of patents in Portfolio can not be more than 2000

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

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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, FL1554

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nelson, Robert J Orlando, FL 132 1806

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Sundstrand Corporation (7)
5,097,195 AC exciter for VSCF starter/generator 45 1989
5,055,764 Low voltage aircraft engine starting system 65 1989
5,068,590 Brushless generator having AC excitation in generating and starting modes 65 1989
5,594,322 Starter/generator system with variable-frequency exciter control 106 1993
5,512,811 Starter/generator system having multivoltage generation capability 70 1994
5,581,168 Starter/generator system with DC link current control 56 1994
5,920,162 Position control using variable exciter feed through 35 1996
 
ALLIEDSIGNAL INC. (1)
5,406,189 Low input harmonic induced multiple use AC synchronous generator starter converter 10 1992
 
DOS SANTOS DA PONTE, MANUEL (1)
6,175,217 Hybrid generator apparatus 112 1999
 
HITACHI, LTD. (1)
5,675,188 Adjustable speed gas turbine power generation apparatus and its operation method independent of ambient temperature 4 1994
 
OREGON STATE UNIVERSITY (1)
4,994,684 Doubly fed generator variable speed generation control system 116 1989
 
POWERMATE CORPORATION (1)
6,144,190 Energy conversion system employing stabilized half-bridge inverter 18 1999
 
Westinghouse Electric Corp. (1)
5,873,238 Startup cooling steam generator for combustion turbine 8 1996

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HAMILTON SUNDSTRAND CORPORATION (3)
6,836,086 Controlled starting system for a gas turbine engine 19 2002
7,253,535 Electrical starter generator system for a gas turbine engine 13 2005
8,575,900 Rotor based air gap heating for air driven turbine 0 2010
 
SIEMENS ENERGY, INC. (3)
6,762,512 Methods for starting a combustion turbine and combustion turbine generator configured to implement same methods 6 2002
7,449,795 Electric power generation system using a permanent magnet dynamoelectric machine for starting a combustion turbine and for generating uninterruptible excitation power 4 2005
7,692,414 Regenerative static excitation system for superconducting rotor 0 2007
 
HITACHI, LTD. (2)
6,684,639 Combustion turbine power generation system and method of controlling the same 0 2002
6,834,502 Combustion turbine power generation system and method of controlling the same 2 2003
 
DASSAULT AVIATION (1)
6,486,639 Method of controlling a stand-alone electrical generator, in particular for aircraft 16 2000
 
GENERAL ELECTRIC COMPANY (1)
7,150,090 Method for matching a collector to replace a brushless exciter in a turbine generator drive train 0 2004