US5751069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat engine generator control system
Assignee: Motors Liquidation Co
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Filing: 1996-07-01
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Granted: 1998-05-12
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Expires: 2016-07-01
Abstract
Abstract An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.
Inventors
- 👤 Kaushik Rajashekara
- 👤 Bhanuprasad Venkata Gorti
- 👤 Steven Robert McMullen
- 👤 Robert Joseph Raibert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:56
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/48; H02P9/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
An electrical power generation system comprising: a heat engine for imparting torque to an output member, including a working gas, an input heat source, and a temperature control for maintaining the working gas at a substantially constant predetermined temperature; a dynamoelectric machine for producing an electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter; speed sensing means for detecting the speed of the output member; a power request signal indicative of a desired level of electrical output power; and, means for adjusting said at least one electrical parameter in response to the power request signal to control the output member to a predetermined speed consistent with said desired level of electrical output power.
Claim 2
Dependent Claim
135 words
An electrical power generation system comprising: a heat engine for imparting torque to an output member, including a working gas, an input heat source, and a temperature control for maintaining the working gas at a substantially constant predetermined temperature; a dynamoelectric machine for producing an electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter; speed sensing means for detecting the speed of the output member; a power request signal indicative of a desired level of electrical output power; and, means for adjusting said at least one electrical parameter in response to the power request signal to control the output member to a predetermined speed consistent with said desired level of electrical output power.
Claim 3
Dependent Claim
48 words
An electrical power generation system as claimed in claim 1 wherein said input heat source comprises a fuel combustion system and said temperature control comprises a closed loop control for adjusting the fuel delivery system in response to deviation of working gas temperature from a predetermined desired temperature.
Claim 4
Dependent Claim
25 words
An electrical power generation system as claimed in claim 1 wherein said dynamoelectric machine comprises an induction machine including a stator and polyphase output windings.
Claim 5
Dependent Claim
19 words
An electrical power generation system as claimed in claim 1 wherein said heat engine comprises a fixed piston stroke.
Claim 6
Dependent Claim
18 words
An electrical power generation system as claimed in claim 1 wherein said working gas comprises an unaltered mass.
Claim 7
Dependent Claim
26 words
An electrical power generation system as claimed in claim 3 wherein said means for adjusting said at least one electrical parameter comprises output current control means.
Claim 8
Dependent Claim
116 words
An electrical power generation system comprising: a heat engine for imparting torque to an output member, including a working gas and an input heat source; a dynamoelectric machine for producing an electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter; a closed loop temperature control effective to maintain the working gas at a substantially constant temperature; and a closed loop speed control effective to adjust said at least one controllable electrical parameter to control the speed of the rotor to a predetermined desired speed by controlling the load torque imposed upon the output member.
Claim 9
Dependent Claim
116 words
An electrical power generation system comprising: a heat engine for imparting torque to an output member, including a working gas and an input heat source; a dynamoelectric machine for producing an electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter; a closed loop temperature control effective to maintain the working gas at a substantially constant temperature; and a closed loop speed control effective to adjust said at least one controllable electrical parameter to control the speed of the rotor to a predetermined desired speed by controlling the load torque imposed upon the output member.
Claim 10
Dependent Claim
41 words
An electrical power generation system as claimed in claim 7, wherein said dynamoelectric machine comprises a three-phase induction machine including a stator and said at least one controllable electrical parameter includes the speed of a rotating field established in the stator.
Claim 11
Independent Claim
198 words
A method for controlling the electrical output power of a power generating system having a heat engine for imparting torque to an output member, including a working gas, an input heat source, and a closed loop temperature control for maintaining the working gas at a substantially constant predetermined temperature, and a dynamoelectric machine for producing electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter, the method comprising: monitoring a signal indicative of a desired electrical output power; when the electrical output power is not equivalent to the desired electrical power, momentarily controlling said at least one controllable electrical parameter to effectuate a change in the load torque imposed upon the output member whose sense is opposite that required to attain the desired electrical power resulting in an acceleration of said output member toward a speed known to be associated with the desired electrical output power, and thereafter controlling said at least one controllable electrical parameter to effectuate convergence of said output member speed to said speed known to be associated with the desired electrical output power.
Claim 12
Independent Claim
198 words
A method for controlling the electrical output power of a power generating system having a heat engine for imparting torque to an output member, including a working gas, an input heat source, and a closed loop temperature control for maintaining the working gas at a substantially constant predetermined temperature, and a dynamoelectric machine for producing electrical output power having a rotor operatively coupled to the output member, said machine imposing a load torque upon the output member in accordance with at least one controllable electrical parameter, the method comprising: monitoring a signal indicative of a desired electrical output power; when the electrical output power is not equivalent to the desired electrical power, momentarily controlling said at least one controllable electrical parameter to effectuate a change in the load torque imposed upon the output member whose sense is opposite that required to attain the desired electrical power resulting in an acceleration of said output member toward a speed known to be associated with the desired electrical output power, and thereafter controlling said at least one controllable electrical parameter to effectuate convergence of said output member speed to said speed known to be associated with the desired electrical output power.
Claim 13
Dependent Claim
29 words
The method for controlling the electrical output power of a power generating system as claimed in claim 9 wherein said at least one controllable electrical parameter comprises output current.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |