Patent US3650084A successfully refreshed from Google Patents.
Patent US3573604A successfully refreshed from Google Patents.
US3573604A
Expired / Lapsed
US
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Rms ac voltage regulator
Assignee: Collins Radio Co
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Filing: 1970-01-05
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Granted: 1971-04-06
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Expires: 1990-01-05
Abstract
Abstract An RMS voltage regulator is realized in a minimal hardware circuitry by employing a unijunction switch to fire a silicon controlled rectifier element, the latter serving to convert a half-wave rectification of AC line voltage to a full-wave operation at intervals defined by RMS variation of the output from nominal. Peak and average values of the output are sensed, combined in ratio, and compared with a reference DC voltage to control the periodicy of SCR firing in a manner to cause average and peak output values to move oppositely, thus attaining a substantially constant output RMS value.
Inventors
- 👤 Michael W Lundgreen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:33
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H02M7/1557
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
317 words
A voltage regulator for maintaining a substantially constant RMS output voltage in response to an alternating current input voltage the RMS value of which varies with respect to a nominal value, comprising rectifying means receiving said input signal and providing a signal output to an output line, said rectifying means being adapted to operate as a half-wave rectifier in a first operational mode and as a full-wave rectifier in a second operational mode, means for periodically effecting said second operational mode of said rectifying means, said last named means comprising means sensing the peak value of said output voltage, means sensing the average value of said output voltage, means combining said peak and average voltages and comparing the combined signal to a reference signal, control signal development means responsive to the output of said comparison means, said control means periodically effecting said second rectifier operational mode as a function of the deviation of said combined signal from said reference, said second rectifier operational mode being effected with a periodicy which is a function of said control signal, said rectifying means comprising a center tapped secondary winding of a transformer the primary winding of which receives said input signal, said output line being connected to the center tap of said secondary winding and referenced to common ground, one end of said secondary winding being connEcted to a first unilateral conduction device to common ground, the other end of said secondary winding being selectively connectable through a normally disabled second unilateral conduction device to common ground, said control means effecting a selective enablement of said second unilateral conduction device in response to which said second rectifier operational mode is effected, whereby a rise in output peak voltage is accompanied by a corresponding decrease in average output voltage and the RMS value of said output voltage is held substantially constant over a predetermined range of variation of said input signal.
Claim 2
Dependent Claim
317 words
A voltage regulator for maintaining a substantially constant RMS output voltage in response to an alternating current input voltage the RMS value of which varies with respect to a nominal value, comprising rectifying means receiving said input signal and providing a signal output to an output line, said rectifying means being adapted to operate as a half-wave rectifier in a first operational mode and as a full-wave rectifier in a second operational mode, means for periodically effecting said second operational mode of said rectifying means, said last named means comprising means sensing the peak value of said output voltage, means sensing the average value of said output voltage, means combining said peak and average voltages and comparing the combined signal to a reference signal, control signal development means responsive to the output of said comparison means, said control means periodically effecting said second rectifier operational mode as a function of the deviation of said combined signal from said reference, said second rectifier operational mode being effected with a periodicy which is a function of said control signal, said rectifying means comprising a center tapped secondary winding of a transformer the primary winding of which receives said input signal, said output line being connected to the center tap of said secondary winding and referenced to common ground, one end of said secondary winding being connEcted to a first unilateral conduction device to common ground, the other end of said secondary winding being selectively connectable through a normally disabled second unilateral conduction device to common ground, said control means effecting a selective enablement of said second unilateral conduction device in response to which said second rectifier operational mode is effected, whereby a rise in output peak voltage is accompanied by a corresponding decrease in average output voltage and the RMS value of said output voltage is held substantially constant over a predetermined range of variation of said input signal.
Claim 3
Dependent Claim
71 words
A regulating means as defined in claim 1 wherein said unilateral conduction device is a silicon-controlled rectifier including an anode and cathode electrode connected in circuit between said second secondary winding and common ground, the output from said control means being adapted to provide synchronous pulses to fire said silicon-controlled rectifier during predetermined ones of alternate half-cycles of said input signals, whereby said predetermined half-cycles are conveyed to said output line.
Claim 4
Dependent Claim
44 words
A regulating means as defined in claim 1 wherein said means for combining said output voltage peak and average values comprises means summing said peak and average output signals in a predetermined ratio to establish the nominal output RMS value of said output signal.
Claim 5
Dependent Claim
78 words
A voltage regulator as defined in claim 2 wherein said control means comprises a signal integrating means to which charging impulses are synchronously applied, the magnitude of said charging impulses being a function of the discrepancy between the RMS value of said output signal and said reference, a trigger circuitry receiving said charging impulses and being effective to develop a firing impulse for application to said silicon-controlled rectifier upon said integrating means charging to a predetermined voltage level.
Claim 6
Dependent Claim
126 words
A regulating means as defined in claim 4 including means responsive to said input signal to develop a train of enabling pulses time coincident with successive alternate zero crossings of said input signal, said control means including means responsive to the variation of the RMS value of said output signal from said nominal value to determine the current generating capability of a current generating means, said current generating means being rendered operable during the time occurrence of said periodic impulses, said integrating means being connected to said current generating means and thereby charging to a predetermined value after the time occurrence of a predetermined number of said charging impulses the pulse magnitudes and periodicy of which are proportional to the RMS value of said output signal.
Claim 7
Dependent Claim
64 words
A regulating means as defined in claim 5 wherein said control means is effective in firing said silicon-controlled rectifier at a rate synchronous with alternate ones of said input signal half-cycles, said rate being an inverse function of the peak value of said output signal whereby said peak and average values of the output signal vary from nominal values thereof in respective opposing directions.
Claim 8
Dependent Claim
97 words
A regulating means as defined in claim 5 wherein said RMS sensing means comprises a summing amplifier including first and second amplifying stages in a summing amplifier configuration, said RMS reference signal being applied as input to its first one of said stages, the peak and average values of said output signal being applied in summation as input to a second one of said stages, and the output from said summing amplifier being applied to said current generating means to establish the current generating capabilities thereof during those periods when said current generating means is rendered operable.
Claim 9
Dependent Claim
214 words
A voltage regulating means for producing a substantially constant RMS output voltage in response to an alternating current input voltage the peak value of which varies with respect to a nominal value, comprising signal transforming means iNcluding a primary winding receiving said alternating current input signal, a secondary winding including a center-tap terminal and first and second end terminals, said first end terminal being connected through a first unilateral conduction device to ground, said second terminal being connectable through a normally disabled second unilateral conduction device to ground, an output signal taken between said center-tap terminal and ground, means for selectively enabling said second unilateral conduction device comprising means for developing a signal proportional to the peak amplitude of said output signal, means for developing a signal proportional to the average of said output signal, control means responsive to the deviation of the summation of said peak and average signals from a reference signal to render said second unilateral conduction device operational at predetermined time intervals within the time defined by alternate half-cycles of said input signal whereby at least predetermined portions of said alternate half-cycles appear on said output line, the periodicy of said enablement being a function of the discrepancy of the RMS values of said output signal from a nominal reference.
Claim 10
Dependent Claim
214 words
A voltage regulating means for producing a substantially constant RMS output voltage in response to an alternating current input voltage the peak value of which varies with respect to a nominal value, comprising signal transforming means iNcluding a primary winding receiving said alternating current input signal, a secondary winding including a center-tap terminal and first and second end terminals, said first end terminal being connected through a first unilateral conduction device to ground, said second terminal being connectable through a normally disabled second unilateral conduction device to ground, an output signal taken between said center-tap terminal and ground, means for selectively enabling said second unilateral conduction device comprising means for developing a signal proportional to the peak amplitude of said output signal, means for developing a signal proportional to the average of said output signal, control means responsive to the deviation of the summation of said peak and average signals from a reference signal to render said second unilateral conduction device operational at predetermined time intervals within the time defined by alternate half-cycles of said input signal whereby at least predetermined portions of said alternate half-cycles appear on said output line, the periodicy of said enablement being a function of the discrepancy of the RMS values of said output signal from a nominal reference.
Claim 11
Dependent Claim
32 words
A regulating means as defined in claim 8 wherein said peak and average output signals are summed in a predetermined ratio to establish the nominal output RMS reference of said output signal.
Claim 12
Dependent Claim
75 words
A regulating means as defined in claim 8 wherein said second unilateral conduction device comprises a silicon-controlled rectifier the anode and cathode electrodes of which are serially connected between said transformer secondary winding second terminal and ground, said control means developing a firing impulse for said silicon-controlled rectifier during those alternate ones of half-cycles of said input signal when the anode electrode of said silicon-controlled rectifier is positive with respect to the cathode electrode thereof.
Claim 13
Dependent Claim
77 words
A voltage regulator as defined in claim 10 wherein said control means comprises a signal-integrating means to which charging impulses are synchronously applied, the magnitude of said charging impulses being a function of the discrepancy between the RMS value of said output signal and said reference, a trigger circuitry receiving said charging impulses and being effective to develop a firing impulse for application to said silicon-controlled rectifier upon said integrating means charging to a predetermined voltage level.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |