US7471008B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for controlling a rotational speed of a rotor of a turbogenerator
Assignee: Deere and Co
•
Filing: 2006-09-01
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Granted: 2008-12-30
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Expires: 2026-09-01
Abstract
Abstract A system and method controls a rotational speed of a rotor or shaft of a turbogenerator in accordance with a present voltage level on a direct current bus. A lower threshold and a higher threshold are established for a speed of a rotor or shaft of a turbogenerator. A speed sensor determines speed data or a speed signal for the rotor or shaft associated with a turbogenerator. A voltage regulator adjusts a voltage level associated with a direct current bus within a target voltage range if the speed data or speed signal indicates that the speed is above the higher threshold or below the lower threshold.
Inventors
- 👤 Ronnie Dean Stahlhut
- 👤 Carl Thomas Vuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:35
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/04; H02P9/14; H02P9/26; H02P9/30; H02P9/305
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
90 words
A method for controlling a rotational speed of a rotor or shaft of a turbogenerator, the method comprising: establishing a lower threshold and a higher threshold for a speed of a rotor or shaft of a turbogenerator; determining speed data or a speed signal for a rotor or shaft associated with a turbogenerator; and adjusting a voltage level associated with a direct current bus within a target voltage range if the speed data or speed signal indicates that the speed is above the higher threshold or below the lower threshold.
Claim 2
Independent Claim
90 words
A method for controlling a rotational speed of a rotor or shaft of a turbogenerator, the method comprising: establishing a lower threshold and a higher threshold for a speed of a rotor or shaft of a turbogenerator; determining speed data or a speed signal for a rotor or shaft associated with a turbogenerator; and adjusting a voltage level associated with a direct current bus within a target voltage range if the speed data or speed signal indicates that the speed is above the higher threshold or below the lower threshold.
Claim 3
Dependent Claim
42 words
The method according to claim 1 wherein the adjusting comprises: increasing the voltage level associated with the direct current bus within the target voltage range if the speed data or the speed signal indicates that the speed is below the lower threshold.
Claim 4
Dependent Claim
42 words
The method according to claim 1 wherein the adjusting comprises: decreasing the voltage level associated with the direct current bus level within the target voltage range if the speed data or the signal indicates that the speed is above the higher threshold.
Claim 5
Dependent Claim
19 words
The method according to claim 1 further comprising: detecting a present voltage level associated with the direct current bus.
Claim 6
Dependent Claim
50 words
The method according to claim 4 wherein the adjusting further comprises: increasing the voltage level of the direct current bus to an elevated voltage level above the detected present voltage level if the detected present voltage level is less than a maximum voltage level associated with the target voltage range.
Claim 7
Dependent Claim
50 words
The method according to claim 4 wherein the adjusting further comprises: decreasing the voltage level of the direct current bus to a reduced voltage level below the detected present voltage level if the detected present voltage level is greater than a minimum voltage level associated with the target voltage range.
Claim 8
Dependent Claim
76 words
The method according to claim 1 further comprising: determining if the speed of the shaft or rotor of the turbogenerator is within a desired range bounded by the lower threshold and the higher threshold; and waiting for a sample time period prior to determining next speed data or a next speed signal for the rotor or the shaft associated with the turbogenerator if the determined speed of the shaft or rotor is within the desired range.
Claim 9
Dependent Claim
36 words
The method according to claim 1 wherein the adjusting comprises: inhibiting any increase or decrease of the direct current bus level that would cause the direct current bus level to fall outside the target voltage range.
Claim 10
Independent Claim
102 words
A system for controlling a rotational speed of a rotor or shaft of a turbogenerator, the system comprising: a monitor for establishing a lower threshold and a higher threshold for a speed of a rotor or shaft of a turbogenerator; a speed sensor for determining speed data or a speed signal for the rotor or the shaft associated with a turbogenerator; and a voltage regulator for adjusting a voltage level of a direct current bus within a target voltage range if the speed data or the speed signal indicates that the speed is above the higher threshold or below the lower threshold.
Claim 11
Independent Claim
102 words
A system for controlling a rotational speed of a rotor or shaft of a turbogenerator, the system comprising: a monitor for establishing a lower threshold and a higher threshold for a speed of a rotor or shaft of a turbogenerator; a speed sensor for determining speed data or a speed signal for the rotor or the shaft associated with a turbogenerator; and a voltage regulator for adjusting a voltage level of a direct current bus within a target voltage range if the speed data or the speed signal indicates that the speed is above the higher threshold or below the lower threshold.
Claim 12
Dependent Claim
42 words
The system according to claim 9 wherein the voltage regulator increases the voltage level associated with the direct current bus within the target voltage range if the speed data or the speed signal indicates that the speed is below the lower threshold.
Claim 13
Dependent Claim
42 words
The system according to claim 9 wherein the voltage regulator decreases the voltage level associated with the direct current bus level within the target voltage range if the speed data or the signal indicates that the speed is above the higher threshold.
Claim 14
Dependent Claim
23 words
The system according to claim 9 further comprising a voltage detector for detecting a present voltage level associated with the direct current bus.
Claim 15
Dependent Claim
49 words
The system according to claim 12 wherein the voltage regulator increases the voltage level of the direct current bus to an elevated voltage level above the detected present voltage level if the detected present voltage level is less than a maximum voltage level associated with the target voltage range.
Claim 16
Dependent Claim
49 words
The system according to claim 12 wherein the voltage regulator decreases the voltage level of the direct current bus to a reduced voltage level below the detected present voltage level if the detected present voltage level is greater than a minimum voltage level associated with the target voltage range.
Claim 17
Dependent Claim
82 words
The system according to claim 9 wherein the speed sensor determines if the speed of the shaft or rotor of the turbogenerator is within a desired range bounded by the higher threshold and the lower threshold; and the monitor waits for a sample time period prior to determining next speed data or a next speed signal for the rotor or the shaft associated with the turbogenerator if the determined speed of the shaft or the rotor is within the target voltage range.
Claim 18
Dependent Claim
36 words
The system according to claim 9 wherein the voltage regulator inhibits any increase or decrease of the direct current bus level that would cause the direct current bus level to fall outside the target voltage range.
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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) | 2011-12-30 | 2012-06-30 | 2012-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-12-30 | 2016-06-30 | 2016-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-12-30 | 2020-06-30 | 2020-12-30 | $7700.00 | Window Closed / Lapsed |