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
Stats
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Sep 4, 2001
Issued date -
Nov 24, 1999
filing date -
09/448,653
serial no -
In Force
status
Importance
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Abstract
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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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,097,195 AC exciter for VSCF starter/generator | 44 | 1989 | |
| 5,055,764 Low voltage aircraft engine starting system | 63 | 1989 | |
| 5,068,590 Brushless generator having AC excitation in generating and starting modes | 63 | 1989 | |
| 5,594,322 Starter/generator system with variable-frequency exciter control | 102 | 1993 | |
| 5,512,811 Starter/generator system having multivoltage generation capability | 66 | 1994 | |
| 5,581,168 Starter/generator system with DC link current control | 53 | 1994 | |
| 5,920,162 Position control using variable exciter feed through | 35 | 1996 | |
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| 5,406,189 Low input harmonic induced multiple use AC synchronous generator starter converter | 10 | 1992 | |
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| 6,175,217 Hybrid generator apparatus | 100 | 1999 | |
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| 5,675,188 Adjustable speed gas turbine power generation apparatus and its operation method independent of ambient temperature | 3 | 1994 | |
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| 4,994,684 Doubly fed generator variable speed generation control system | 107 | 1989 | |
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| 6,144,190 Energy conversion system employing stabilized half-bridge inverter | 16 | 1999 | |
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| 5,873,238 Startup cooling steam generator for combustion turbine | 8 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 4, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |