Patent US5055765A successfully refreshed from Google Patents.
US5055765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator for direct current aircraft power bus
Assignee: Sundstrand Corp
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Filing: 1990-09-04
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Granted: 1991-10-08
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Expires: 2010-09-04
Abstract
Abstract A voltage regulator for an aircraft d.c. power supply in which the gain of the voltage regulator varies as a function of d.c. load current and a.c. generator speed. In addition, in a preferred embodiment of the invention, low noise lead compensation is provided by a network which models the system response to changing load currents. It predicts the change in d.c. voltage which would occur in response to load current changes and provides regulator lead compensation.
Inventors
- 👤 Gregory I. Rozman
- 👤 William R. Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:31
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/04; H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30; H02P2101/00; H02P2101/30
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
122 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a variable gain voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify said signal including means to increase the gain of said voltage regulator at relatively high-load currents and decrease said gain at relatively low-load currents.
Claim 2
Dependent Claim
122 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a variable gain voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify said signal including means to increase the gain of said voltage regulator at relatively high-load currents and decrease said gain at relatively low-load currents.
Claim 3
Dependent Claim
122 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify said signal including means to decrease the gain of said voltage regulator as said generator speed increases and increase said gain as said generator speed decreases.
Claim 4
Dependent Claim
122 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify said signal including means to decrease the gain of said voltage regulator as said generator speed increases and increase said gain as said generator speed decreases.
Claim 5
Dependent Claim
153 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a variable gain voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; first means to modify said signal including means to increase the gain of said voltage regulator at relatively high-load currents and decrease said gain at relatively low-load currents; and second means to modify said signal including means to decrease the gain of said voltage regulator as said generator speed increases and increase said gain as said generator speed decreases.
Claim 6
Dependent Claim
153 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a variable gain voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; first means to modify said signal including means to increase the gain of said voltage regulator at relatively high-load currents and decrease said gain at relatively low-load currents; and second means to modify said signal including means to decrease the gain of said voltage regulator as said generator speed increases and increase said gain as said generator speed decreases.
Claim 7
Dependent Claim
128 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify the gain of said voltage regulator including means to predict d.c. load voltage changes in response to load current changes based upon a model of the a.c. generator and filter capacitor response.
Claim 8
Dependent Claim
128 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; and means to modify the gain of said voltage regulator including means to predict d.c. load voltage changes in response to load current changes based upon a model of the a.c. generator and filter capacitor response.
Claim 9
Dependent Claim
187 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; first means to modify the gain of said voltage regulator including means to increase said signal at relatively high-load currents and decrease said gain at relatively low-load currents; second means to modify the gain of said voltage regulator including means to decrease said gain as said generator speed increases and increase said gain as said generator speed decreases; and third means to modify the gain of said voltage regulator including means to predict d.c. load voltage changes in response to load current changes based upon a model of the a.c. generator and filter capacitor response.
Claim 10
Dependent Claim
187 words
In an aircraft direct current power supply system in which an exciter controls the output of an a.c. generator driven by a variable speed aircraft turbine and the output of the a.c. generator is coupled to a load via a rectifier and a filter capacitor, a voltage regulator for controlling the d.c. load voltage comprising in combination: means to compare said d.c. load voltage with a voltage reference, said comparing means generating a signal whose magnitude is a function of the difference between said d.c. load voltage and said d.c. voltage reference; first means to modify the gain of said voltage regulator including means to increase said signal at relatively high-load currents and decrease said gain at relatively low-load currents; second means to modify the gain of said voltage regulator including means to decrease said gain as said generator speed increases and increase said gain as said generator speed decreases; and third means to modify the gain of said voltage regulator including means to predict d.c. load voltage changes in response to load current changes based upon a model of the a.c. generator and filter capacitor response.
Claim 11
Dependent Claim
48 words
A voltage regulator as in claim 1 further including current limiting means, said current limiting means including means to compare the d.c. load current with a current reference and means to reduce the d.c. load voltage below said voltage reference if said load current exceeds a predetermined value.
Claim 12
Dependent Claim
45 words
A voltage regulator as in claim 1 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 13
Dependent Claim
48 words
A voltage regulator as in claim 2 further including current limiting means, said current limiting means including means to compare the d.c. load current with a current reference and means to reduce the d.c. load voltage below said voltage reference if said load current exceeds a predetermined value.
Claim 14
Dependent Claim
48 words
A voltage regulator as in claim 3 further including current limiting means, said current limiting means including means to compare the d.c. load current with a current reference and means to reduce the d.c. load voltage below said voltage reference if said load current exceeds a predetermined value.
Claim 15
Dependent Claim
48 words
A voltage regulator as in claim 4 further including current limiting means, said current limiting means including means to compare the d.c. load current with a current reference and means to reduce the d.c. load voltage below said voltage reference if said load current exceeds a predetermined value.
Claim 16
Dependent Claim
48 words
A voltage regulator as in claim 5 further including current limiting means, said current limiting means including means to compare the d.c. load current with a current reference and means to reduce the d.c. load voltage below said voltage reference if said load current exceeds a predetermined value.
Claim 17
Dependent Claim
45 words
A voltage regulator as in claim 2 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 18
Dependent Claim
45 words
A voltage regulator as in claim 3 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 19
Dependent Claim
45 words
A voltage regulator as in claim 4 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 20
Dependent Claim
45 words
A voltage regulator as in claim 5 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 21
Dependent Claim
45 words
A voltage regulator as in claim 6 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 22
Dependent Claim
45 words
A voltage regulator as in claim 8 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 23
Dependent Claim
45 words
A voltage regulator as in claim 9 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 24
Dependent Claim
45 words
A voltage regulator as in claim 10 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
Claim 25
Dependent Claim
45 words
A voltage regulator as in claim 11 further including power limiting means, said power limiting means including means to compare d.c. load power with a power reference and means to reduce the d.c. voltage below said voltage reference if said power exceeds a predetermined value.
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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |