Patent US3815014A successfully refreshed from Google Patents.
US3815014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compromise voltage control for tracking multiple output power supply
Assignee: International Business Machines Corp
•
Filing: 1973-06-21
•
Granted: 1974-06-04
•
Expires: 1993-06-21
Abstract
Abstract A feedback control system is utilized to control the output voltage levels of a power supply having multiple output voltage signals which relatively track one another. This feedback control system encloses each output voltage signal within the feedback loop and allows independent definition of the tolerance of each voltage signal. Each output voltage signal is normalized and a percent error signal is obtained for each normalized voltage signal by comparison to a common voltage reference. The percent error signals are then weighted by factors which are inversely proportional to the defined tolerances for their associated voltage signals. An error control system is then responsive to the weighted percent error signals to control the output voltage levels of the power supply. In a first embodiment, the control system includes a summing network which provides a feedback correction signal to the power supply when the sum of the weighted percent error signals does not equal zero. In a second embodiment, the control system includes a switching network which provides a feedback correction signal to the power supply when the magnitude of the most negative weighted percent error signal does not equal that of the most positive weighted percent error signal.
Inventors
- 👤 J Davis
- 👤 D Dobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:34
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33561; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/577
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
A voltage level control system for a power supply having a plurality of more than two output voltage signals which inherently track comprising: a plurality of percent error signal generating means each responsive to individual ones of the plurality of output voltage signals and to a reference voltage signal for providing a corresponding plurality of percent error signals, each of the percent error signals being proportional to the difference in magnitude between the reference voltage signal and its corresponding output voltage signal; a plurality of voltage multiplier means each for multiplying individual ones of the plurality of percent error signals by an individual one of a corresponding plurality of factors and for providing a corresponding plurality of multiplied percent error signals, each of said factors being inversely proportional to a predetermined tolerance uniquely associated with each corresponding output voltage signal; an error control system responsive to each of said multiplied percent error signals for providing an output difference signal as a function of each of said multiplied percent error signals said error control system including a plurality of gating cirCuits for selecting the most positive multiplied percent error signal and the most negative multiplied percent error signal and summing means for providing said output difference signal representative of the difference between said most positive multiplied percent error signal and said most negative multiplied percent error signal; feedback control means responsive to said output difference signal for controlling the level of the output voltage signals of the power supply, said feedback control means including a feedback loop for maintaining said difference signal at a nominal value of zero.
Claim 2
Dependent Claim
267 words
A voltage level control system for a power supply having a plurality of more than two output voltage signals which inherently track comprising: a plurality of percent error signal generating means each responsive to individual ones of the plurality of output voltage signals and to a reference voltage signal for providing a corresponding plurality of percent error signals, each of the percent error signals being proportional to the difference in magnitude between the reference voltage signal and its corresponding output voltage signal; a plurality of voltage multiplier means each for multiplying individual ones of the plurality of percent error signals by an individual one of a corresponding plurality of factors and for providing a corresponding plurality of multiplied percent error signals, each of said factors being inversely proportional to a predetermined tolerance uniquely associated with each corresponding output voltage signal; an error control system responsive to each of said multiplied percent error signals for providing an output difference signal as a function of each of said multiplied percent error signals said error control system including a plurality of gating cirCuits for selecting the most positive multiplied percent error signal and the most negative multiplied percent error signal and summing means for providing said output difference signal representative of the difference between said most positive multiplied percent error signal and said most negative multiplied percent error signal; feedback control means responsive to said output difference signal for controlling the level of the output voltage signals of the power supply, said feedback control means including a feedback loop for maintaining said difference signal at a nominal value of zero.
Claim 3
Dependent Claim
99 words
The voltage level control system set forth in claim 1 wherein each of said plurality of percent error signal generating means comprise a voltage multiplier means for multiplying one of said output voltage signals by a factor inversely proportional to the nominal magnitude of said one output voltage signal and for providing a corresponding multiplied output voltage signal; and a summing means responsive to said corresponding multiplied output voltage signal and to a reference voltage for providing an output percent error signal proportional to the difference in magnitude between the reference voltage signal and the corresponding multiplied voltage signal.
Claim 4
Dependent Claim
267 words
A voltage level control system for a power supply having a plurality of more than two output voltage signals which inherently track comprising: voltage normalizing means for normalizing each of said plurality of output voltage signals to a common nominal value and for providing a corresponding plurality of output normalized voltage signals; error signal generating means responsive to each of said plurality of output normalized voltage signals and to a reference voltage signal for providing a corresponding plurality of normalized error signals, each of said error signals being proportional to the difference in magnitude between the reference voltage signal and its corresponding normalized voltage signal; signal weighting means for weighting each normalized error signal by a factor inversely proportional to a predetermined tolerance uniquely associated with each corresponding output voltage signals and for providing a corresponding plurality of weighted normalized error signals; an error control system responsive to each weighted normalized error signal for providing a feedback control signal as a function of each of said weighted normalized error signals said error control system including a plurality of gating circuits for selecting the most positive weighted normalized error signal and the most negative weighted normalized error signal and summing means for providing an output difference signal representative of the difference between said most positive weighted normalized error signal and said most negative weighted normalized error signal; feedback control means responsive to said output difference signal for controlling the level of the output voltage signals of the power supply, said feedback control means including a feedback loop for maintaining said difference signal at a nominal value of zero.
Claim 5
Dependent Claim
267 words
A voltage level control system for a power supply having a plurality of more than two output voltage signals which inherently track comprising: voltage normalizing means for normalizing each of said plurality of output voltage signals to a common nominal value and for providing a corresponding plurality of output normalized voltage signals; error signal generating means responsive to each of said plurality of output normalized voltage signals and to a reference voltage signal for providing a corresponding plurality of normalized error signals, each of said error signals being proportional to the difference in magnitude between the reference voltage signal and its corresponding normalized voltage signal; signal weighting means for weighting each normalized error signal by a factor inversely proportional to a predetermined tolerance uniquely associated with each corresponding output voltage signals and for providing a corresponding plurality of weighted normalized error signals; an error control system responsive to each weighted normalized error signal for providing a feedback control signal as a function of each of said weighted normalized error signals said error control system including a plurality of gating circuits for selecting the most positive weighted normalized error signal and the most negative weighted normalized error signal and summing means for providing an output difference signal representative of the difference between said most positive weighted normalized error signal and said most negative weighted normalized error signal; feedback control means responsive to said output difference signal for controlling the level of the output voltage signals of the power supply, said feedback control means including a feedback loop for maintaining said difference signal at a nominal value of zero.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |