US3728609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric power apparatus comprising converter, lc filter, and voltage regulator arranged for highly accurate and stable response
Assignee: General Electric Co
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Filing: 1972-07-07
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Granted: 1973-04-17
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Expires: 1992-07-07
Abstract
Abstract In electric power apparatus including a voltage-regulated converter and an LC filter supplying a load circuit with relatively smooth unipolarity voltage of desired magnitude, accuracy is promoted by using a novel proportional feedback arrangement which takes into account the IR drop across the series inductance of the filter while avoiding its dynamic transfer characteristic.
Inventors
- 👤 F Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:02
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; H02M1/143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
In combination: a. elecTric power conversion apparatus comprising controlled rectifying means serially connected via a filter to a d-c bus which in turn is adapted to be connected to an electric power load, i. said rectifying means being adapted to be connected to an electric power source and being operative to energize said filter with an undulating voltage whose average magnitude depends on the magnitude of a variable control signal supplied to the rectifying means, ii. said filter having series inductance and parallel capacitance elements of appropriate values to attenuate the ripple in said undulating voltage, whereby a relatively smooth unipolarity output voltage is applied to said d-c bus; b. voltage regulating means for supplying said rectifying means with a control signal whose magnitude is a function of the difference between a given reference signal and a first feedback signal; and c. means coupled to said filter for supplying to said voltage regulating means a first feedback signal which is representative of the sum of said output voltage and a voltage induced in said series inductance element due to changing current therein.
Claim 2
Dependent Claim
182 words
In combination: a. elecTric power conversion apparatus comprising controlled rectifying means serially connected via a filter to a d-c bus which in turn is adapted to be connected to an electric power load, i. said rectifying means being adapted to be connected to an electric power source and being operative to energize said filter with an undulating voltage whose average magnitude depends on the magnitude of a variable control signal supplied to the rectifying means, ii. said filter having series inductance and parallel capacitance elements of appropriate values to attenuate the ripple in said undulating voltage, whereby a relatively smooth unipolarity output voltage is applied to said d-c bus; b. voltage regulating means for supplying said rectifying means with a control signal whose magnitude is a function of the difference between a given reference signal and a first feedback signal; and c. means coupled to said filter for supplying to said voltage regulating means a first feedback signal which is representative of the sum of said output voltage and a voltage induced in said series inductance element due to changing current therein.
Claim 3
Dependent Claim
50 words
The combination of claim 1 in which said first feedback signal supplying means includes a secondary winding inductively coupled to the series inductance element of said filter, the voltage generated in said secondary winding being proportional to the voltage induced in said series inductance element due to changing current therein.
Claim 4
Dependent Claim
104 words
The combination of claim 1 in which said voltage regulating means comprises first and second regulating loops, said first loop being arranged to provide an error signal whose magnitude depends on the difference between the magnitudes of said given reference signal and said first feedback signal, respectively, and said second loop including rate feedback means for deriving a second feedback signal whose magnitude depends on the time rate of change of voltage across said parallel capacitance element, said second loop being arranged to provide said control signal the magnitude of which depends on the difference between said error signal and said second feedback signal.
Claim 5
Dependent Claim
50 words
The combination of claim 3 in which said first feedback signal supplying means includes a secondary winding inductively coupled to the series inductance element of said filter, the voltage generated in said secondary winding being proportional to the voltage induced in said series inductance element due to changing current therein.
Claim 6
Dependent Claim
24 words
The combination of claim 3 in which said first regulating loop includes stabilizing means for attenuating the ripple content of said first feedback signal.
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |