US6023135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbogenerator/motor control system
Assignee: Capstone Green Energy Corp
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Filing: 1998-05-18
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Granted: 2000-02-08
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Expires: 2018-05-18
Abstract
Abstract A turbogenerator/motor control system having a plurality of proportional integral control loops including a fuel command control loop and a current command control loop. The exhaust gas temperature of the gas turbine of the turbogenerator/motor is maintained at a constant value with stability is achieved by varying the sampling times of the different proportional integral controls within the control loops.
Inventors
- 👤 Mark G. Gilbreth
- 👤 James Brian Dickey
- 👤 Charles R. Gilbreth, Jr.
- 👤 Edward C. Edelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:35
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/08; F; F02; F02C; F02C7/00; F02C7/26; F02C7/268
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
A method of controlling a permanent magnet turbogenerator/motor comprising the steps of: providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to start the permanent magnet turbogenerator/motor to achieve self-sustaining operation; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconfiguring the pulse width modulated inverter to supply voltage from the permanent magnet turbogenerator/motor; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
Claim 2
Independent Claim
84 words
A method of controlling a permanent magnet turbogenerator/motor comprising the steps of: providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to start the permanent magnet turbogenerator/motor to achieve self-sustaining operation; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconfiguring the pulse width modulated inverter to supply voltage from the permanent magnet turbogenerator/motor; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
Claim 3
Independent Claim
135 words
A method of controlling a permanent magnet turbogenerator/motor comprising the steps of: providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to drive the permanent magnet turbogenerator/motor as a motor to accelerate the gas turbine engine of the permanent magnet turbogenerator/motor; providing spark and fuel to the gas turbine engine of the permanent magnet turbogenerator/motor during this acceleration to achieve self-sustaining operation of the gas turbine engine; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconnecting the pulse width modulated inverter to the permanent magnet turbogenerator/motor through a rectifier bridge to reconfigure the pulse width modulated inverter to supply utility frequency voltage; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage.
Claim 4
Independent Claim
135 words
A method of controlling a permanent magnet turbogenerator/motor comprising the steps of: providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to drive the permanent magnet turbogenerator/motor as a motor to accelerate the gas turbine engine of the permanent magnet turbogenerator/motor; providing spark and fuel to the gas turbine engine of the permanent magnet turbogenerator/motor during this acceleration to achieve self-sustaining operation of the gas turbine engine; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconnecting the pulse width modulated inverter to the permanent magnet turbogenerator/motor through a rectifier bridge to reconfigure the pulse width modulated inverter to supply utility frequency voltage; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage.
Claim 5
Dependent Claim
106 words
A controller for a permanent magnet turbogenerator/motor, comprising: a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to start said permanent magnet turbogenerator/motor to achieve self sustaining operation; means to disconnect the electrical power from said pulse width modulated inverter once self-sustaining operation of said permanent magnet turbogenerator/motor is achieved; means to reconfigure said pulse width modulated inverter to supply voltage from said permanent magnet turbogenerator/motor; and means to maintain the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
Claim 6
Dependent Claim
106 words
A controller for a permanent magnet turbogenerator/motor, comprising: a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to start said permanent magnet turbogenerator/motor to achieve self sustaining operation; means to disconnect the electrical power from said pulse width modulated inverter once self-sustaining operation of said permanent magnet turbogenerator/motor is achieved; means to reconfigure said pulse width modulated inverter to supply voltage from said permanent magnet turbogenerator/motor; and means to maintain the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
Claim 7
Dependent Claim
190 words
A controller for a permanent magnet turbogenerator/motor having a gas turbine engine, comprising: a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to drive said permanent magnet turbogenerator/motor as a motor to accelerate said gas turbine engine of said permanent magnet turbogenerator/motor; means to provide spark and fuel to said gas turbine engine of said permanent magnet turbogenerator/motor during this acceleration to achieve self sustaining operation of said gas turbine engine; means to disconnect the electrical power from said pulse width modulated inverter and said permanent magnet turbogenerator/motor once self-sustaining operation of said gas turbine engine is achieved; a rectifier bridge operably associated with said pulse width modulated inverter and said permanent magnet turbogenerator/motor; means to reconnect said pulse width modulated inverter to said permanent magnet turbogenerator/motor through said rectifier bridge to reconfigure said pulse width modulated inverter to supply utility frequency voltage; and means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage.
Claim 8
Dependent Claim
190 words
A controller for a permanent magnet turbogenerator/motor having a gas turbine engine, comprising: a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to drive said permanent magnet turbogenerator/motor as a motor to accelerate said gas turbine engine of said permanent magnet turbogenerator/motor; means to provide spark and fuel to said gas turbine engine of said permanent magnet turbogenerator/motor during this acceleration to achieve self sustaining operation of said gas turbine engine; means to disconnect the electrical power from said pulse width modulated inverter and said permanent magnet turbogenerator/motor once self-sustaining operation of said gas turbine engine is achieved; a rectifier bridge operably associated with said pulse width modulated inverter and said permanent magnet turbogenerator/motor; means to reconnect said pulse width modulated inverter to said permanent magnet turbogenerator/motor through said rectifier bridge to reconfigure said pulse width modulated inverter to supply utility frequency voltage; and means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage.
Claim 9
Dependent Claim
47 words
The controller for a permanent magnet turbogenerator/motor of claim 4 wherein said means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage includes a fuel command proportional integral control loop.
Claim 10
Dependent Claim
47 words
The controller for a permanent magnet turbogenerator/motor of claim 4 wherein said means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage includes a current command proportional integral control loop.
Claim 11
Dependent Claim
55 words
The controller for a permanent magnet turbogenerator/motor of claim 4 wherein said means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage includes a fuel command proportional integral control loop and a current command proportional integral control loop.
Claim 12
Dependent Claim
24 words
The controller for a permanent magnet turbogenerator/motor of claim 5 wherein said fuel command proportional integral control loop includes a power proportional integral control.
Claim 13
Dependent Claim
24 words
The controller for a permanent magnet turbogenerator/motor of claim 5 wherein said fuel command proportional integral control loop includes a speed proportional integral control.
Claim 14
Dependent Claim
30 words
The controller for a permanent magnet turbogenerator/motor of claim 5 wherein said fuel command proportional integral control loop includes a power proportional integral control and a speed proportional integral control.
Claim 15
Dependent Claim
27 words
The controller for a permanent magnet turbogenerator/motor of claim 10 wherein said speed proportional integral control has a higher sampling time than said power proportional integral control.
Claim 16
Dependent Claim
51 words
The controller for a permanent magnet turbogenerator/motor of claim 10 wherein said fuel command proportional integral control loop additionally includes a minimum DC bus voltage proportional integral control and a selector to select the highest signal from said speed proportional integral control and said minimum DC bus voltage proportional integral control.
Claim 17
Dependent Claim
26 words
The controller for a permanent magnet turbogenerator/motor of claim 6 wherein said current command proportional integral control loop includes an exhaust gas temperature proportional integral control.
Claim 18
Dependent Claim
26 words
The controller for a permanent magnet turbogenerator/motor of claim 6 wherein said current command proportional integral control loop includes a lower bus voltage proportional integral control.
Claim 19
Dependent Claim
34 words
The controller for a permanent magnet turbogenerator/motor of claim 6 wherein said current command proportional integral control loop includes an exhaust gas temperature proportional integral control and a lower bus voltage proportional integral control.
Claim 20
Dependent Claim
31 words
The controller for a permanent magnet turbogenerator/motor of claim 15 wherein said lower bus voltage proportional integral control has a higher sampling time than said exhaust gas temperature proportional integral control.
Claim 21
Dependent Claim
83 words
The controller for a permanent magnet turbogenerator/motor of claim 4 wherein said means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage includes a fuel command proportional integral control loop having a power proportional integral control and a speed proportional integral control, and a current command proportional integral control loop having an exhaust gas temperature proportional integral control and a lower bus voltage proportional integral control.
Claim 22
Dependent Claim
27 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said speed proportional integral control has a higher sampling time than said power proportional integral control.
Claim 23
Dependent Claim
51 words
The controller for a permanent magnet turbogenerator/motor of claim 18 wherein said fuel command proportional integral control loop additionally includes a minimum DC bus voltage proportional integral control and a selector to select the highest signal from said speed proportional integral control and said minimum DC bus voltage proportional integral control.
Claim 24
Dependent Claim
31 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said lower bus voltage proportional integral control has a higher sampling time than said exhaust gas temperature proportional integral control.
Claim 25
Dependent Claim
48 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said speed proportional integral control has a higher sampling time than said power proportional integral control, and said lower bus voltage proportional integral control has a higher sampling time than said exhaust gas temperature proportional integral control.
Claim 26
Dependent Claim
29 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said power proportional integral control has a lower sampling time than said exhaust gas temperature proportional integral control.
Claim 27
Dependent Claim
29 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said exhaust gas temperature proportional integral control has a lower sampling time than said speed proportional integral control.
Claim 28
Dependent Claim
29 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said speed proportional integral control has a lower sampling time than said lower bus voltage proportional integral control.
Claim 29
Dependent Claim
66 words
The controller for a permanent magnet turbogenerator/motor of claim 17 wherein said power proportional integral control has a lower sampling time than said exhaust gas temperature proportional integral control, said exhaust gas temperature proportional integral control has a lower sampling time than said speed proportional integral control, and said speed proportional integral control has a lower sampling time than said lower bus voltage proportional integral control.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-07 | 2003-08-09 | 2004-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-07 | 2007-08-09 | 2008-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-07 | 2011-08-09 | 2012-02-08 | $7700.00 | Window Closed / Lapsed |