US3922594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for phase displacement regulator circuits
Assignee: Lorain Products Corp
•
Filing: 1974-10-15
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Granted: 1975-11-25
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Expires: 1994-10-15
Abstract
Abstract A control circuit for a regulator circuit of the type in which the regulator output voltage and current are dependent upon the phase angle between an unregulated a-c input voltage wave and a regulating or control voltage wave. The control circuit generates a reference signal that is locked in phase with the a-c input voltage wave and a control signal that is locked in phase with the control voltage wave. Output voltage sensing circuitry is arranged to increase or decrease the phase angle between the control signal and the reference signal, as required, to maintain the output voltage of the regulator at the desired, regulated value. A phase difference limiting network allows the control signal to vary freely in phase with respect to the reference signal so long as the control signal remains within an angular window of from 0* to 60* of lag behind the reference signal and assures that limits of this angular window cannot be exceeded. A damping signal is utilized to assure that the rate of change of the phase angle between the control and reference signal is limited in a manner which affords both high control system stability and rapid dynamic response to changes in input voltage and output current. OR-ing circuitry is also provided to allow the output current to reduce the regulator output voltage and thereby limit the regulator output current to a safe value when the output current attempts to rise beyond its highest rated value.
Inventors
- 👤 Harold J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:42
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162; H02M7/1623
Claims Analysis
Total Claims: 89
Claim 1
Independent Claim
159 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic two-state control signal having a period that varies in accordance with the net signal applied to the input thereof, means for generating a feedback signal that varies in accordance with a signal appearing at the output of the regulator circuit, means for applying the feedback signal to the input of the control oscillator, means for generating a damping signal that varies in accordance with the control angle, a-c coupling means for applying the damping signal to the input of the control oscillator, and means for connecting the output of the control oscillator to the regulator circuit to control the regulating activity thereof.
Claim 2
Dependent Claim
159 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic two-state control signal having a period that varies in accordance with the net signal applied to the input thereof, means for generating a feedback signal that varies in accordance with a signal appearing at the output of the regulator circuit, means for applying the feedback signal to the input of the control oscillator, means for generating a damping signal that varies in accordance with the control angle, a-c coupling means for applying the damping signal to the input of the control oscillator, and means for connecting the output of the control oscillator to the regulator circuit to control the regulating activity thereof.
Claim 3
Dependent Claim
39 words
A control circuit as set forth in claim 1 in which the a-c coupling means includes a capacitor and in which the damping signal comprises a two-state signal the duty-cycle of which varies in accordance with the control angle.
Claim 4
Dependent Claim
51 words
A control circuit as set forth in claim 2 including means for applying a bias current to the input of the control oscillator, the change in damping signal current accompanying a change in the state of the damping signal being on the order of three to ten times the bias current.
Claim 5
Dependent Claim
27 words
A control circuit as set forth in claim 3 wherein changes in control angle are reflected substantially instantaneously by changes in the duty-cycle of the damping signal.
Claim 6
Dependent Claim
39 words
A control circuit as set forth in claim 1 in which the a-c coupling means includes a capacitor and in which the damping signal comprises a signal the average value of which varies in accordance with the control angle.
Claim 7
Dependent Claim
156 words
A control circuit as set forth in claim 1 in which the control oscillator includes: means for generating complementary signals that vary in accordance with the net signal at the input of the control oscillator, an integrating network, switching means having a first state in which one of the complementary signals is applied to the integrating network and a second state in which the other of the complementary signals is applied to the integrating network, positive comparing means for establishing a positive integrating limit for the integrating network, negative comparing means for establishing a negative integrating limit for the integrating network, a flip-flop, means for connecting the positive comparing means to one input of the flip-flop, means for connecting the negative comparing means to the other input of the flip-flop, means for connecting the flip-flop in switching control relationship to the switching means, and means for connecting the flip-flop to the output of the control oscillator.
Claim 8
Dependent Claim
39 words
A control circuit as set forth in claim 6 in which the a-c coupling means includes a capacitor and in which the damping signal comprises a two-state signal the duty-cycle of which varies in accordance with the control angle.
Claim 9
Dependent Claim
51 words
A control circuit as set forth in claim 7 including means for applying a bias current to the input of the control oscillator, the change in damping signal current accompanying a change in the state of the damping signal being on the order of three to ten times the bias current.
Claim 10
Dependent Claim
27 words
A control circuit as set forth in claim 8 wherein changes in control angle are reflected substantially instantaneously by changes in the duty-cycle of the damping signal.
Claim 11
Dependent Claim
27 words
A control circuit as set forth in claim 1 in which the feedback signal varies in accordance with the voltage at the output of the regulator circuit.
Claim 12
Dependent Claim
27 words
A control circuit as set forth in claim 1 in which the feedback signal varies in accordance with the current at the output of the regulator circuit.
Claim 13
Dependent Claim
180 words
A control circuit as set forth in claim 1 including a reference oscillator for generating a periodic two-state reference signal that is locked in phase with the voltage at the input of the regulator circuit, the control and reference oscillators being arranged so that when, under steady-state conditions, the output voltge and current of the regulator circuit are within rated limits, each transition of the control signal occurs after a normally preceeding transition of the reference signal and before a normally following transition of the reference signal, the control circuit further including phase limiting means for fixing the control angle of the regulator circuit in accordance with the control signal when each significant transition of the control signal occurs between the normally preceeding and the normally following significant transitions of the reference signal and for fixing the control angle of the regulator circuit in accordance with the reference signal when any significant transition of the control signal occurs either after the normally following significiant transition of the reference signal or before the normally preceeding significant transition of the reference signal.
Claim 14
Dependent Claim
161 words
A control circuit as set forth in claim 1 including a reference oscillator for generating a periodic two-state reference signal the transitions of which are locked in phase with voltage at the input of the regulator circuit, the reference and control oscillators being arranged so that when, under steady-state conditions, the output voltage and current of the regulator circuit are within rated limits, each significant transition of the control signal occurs within a respective angular reference window the width of which is related to the frequency of the voltage at the input of the regulator circuit, the control circuit further including phase limiting means for fixing the control angle of the regulator circuit in accordance with the control signal when the significant transitions thereof occur within respective angular reference windows and for fixing the control angle of regulator circuit in accordance with the reference signal when a significant transition of the control signal occurs outside of its respective angular reference window.
Claim 15
Dependent Claim
140 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic two-state control signal the period of which varies in accordance with the net signal at the input thereof, means for generating a feedback signal that varies in accordance with a signal at the output of the regulator circuit, means for applying the feedback signal to the input of the control oscillator, means for limiting the rate of change of the period of the periodic control signal, and means for applying the control signal to the regulator circuit to control the regulating activity thereof.
Claim 16
Dependent Claim
140 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic two-state control signal the period of which varies in accordance with the net signal at the input thereof, means for generating a feedback signal that varies in accordance with a signal at the output of the regulator circuit, means for applying the feedback signal to the input of the control oscillator, means for limiting the rate of change of the period of the periodic control signal, and means for applying the control signal to the regulator circuit to control the regulating activity thereof.
Claim 17
Dependent Claim
156 words
A control circuit as set forth in claim 14 in which the control oscillator includes: means for generating complementary signals that vary in accordance with the net signal at the input of the control oscillator, an integrating network, switching means having a first state in which one of the complementary signals is applied to the integrating network and a second state in which the other of the complementary signals is applied to the integrating network, positiVe comparing means for establishing a positive integrating limit for the integrating network, negative comparing means for establishing a negative integrating limit for the integrating network, a flip-flop, means for connecting the positive comparing means to one input of the flip-flop, means for connecting the negative comparing means to the other input of the flip-flop, means for connecting the flip-flop in switching control relationship to the switching means, and means for connecting the flip-flop to the output of the control oscillator.
Claim 18
Dependent Claim
27 words
A control circuit as set forth in claim 14 in which the feedback signal varies in accordance with the voltage at the output of the regulator circuit.
Claim 19
Dependent Claim
27 words
A control circuit as set forth in claim 14 in which the feedback signal varies in accordance with the current at the output of the regulator circuit.
Claim 20
Dependent Claim
173 words
A control circuit as set forth in claim 14 including a reference oscillator for generating a periodic, two-state reference signal that is locked in phase with the voltage at the input of the regulator circuit, the reference and control oscillators being arranged so that when, under steady-state conditions, the output voltage and current of the regulator circuit are within rated limits, each significant transition of the control signal occurs after a normally preceeding transition of the reference signal and before a normally following transition of the reference signal, said control circuit further including phase limiting means for fixing the control angle of the regulator circuit in accordance with the control signal when the transitions thereof appear between the normally preceeding and the normally following transitions of the reference signal and for fixing the control angle of the regulator circuit in accordance with the reference signal when a transition of the control signal occurs either after the normally following transition of the reference signal or before the normally preceeding transition of the reference signal.
Claim 21
Dependent Claim
164 words
A control circuit as set forth in claim 14 including a reference oscillator for generating a periodic, two-state reference signal the transitions of which are locked in phase with the voltage at the input of the regulator circuit, the reference and control oscillators being arranged so that when, under steady-state conditions, the output voltage and current of the regulator circuit are within rated limits, each significant transition of the control signal occurs within a respective angular reference window the width of which is related to the frequency of the voltage at the input of the regulator circuit, the control circuit further including phase limiting means for fixing the control angle of the regulator circuit in accordance with the control signal when each significant transition thereof occurs within its respective angular reference window and for fixing the control angle of the regulator circuit in accordance with the reference signal when any significant transition of the control signal occurs outside of its respective angular reference window.
Claim 22
Dependent Claim
46 words
A control circuit as set forth in claim 19 in which the means for limiting the rate of change of the period of the periodic control signal comprises means for distributing a necessary change in the control angle over at least two successive angular reference windows.
Claim 23
Dependent Claim
165 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, means for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, means for generating a control pulse train that is locked in phase with a control voltage wave of the regulator circuit, means for generating a feedback signal that varies in accordance with the voltage at the output of the regulator circuit, means responsive to the feedback signal for adjusting the phase relationship of the referencE and control pulse trains, means for generating a damping signal that varies in accordance with the control angle, means responsive to the damping signal for limiting the rate of change of the control angle, and means for applying the control pulse train to the regulator circuit to control the regulating activity thereof.
Claim 24
Dependent Claim
165 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, means for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, means for generating a control pulse train that is locked in phase with a control voltage wave of the regulator circuit, means for generating a feedback signal that varies in accordance with the voltage at the output of the regulator circuit, means responsive to the feedback signal for adjusting the phase relationship of the referencE and control pulse trains, means for generating a damping signal that varies in accordance with the control angle, means responsive to the damping signal for limiting the rate of change of the control angle, and means for applying the control pulse train to the regulator circuit to control the regulating activity thereof.
Claim 25
Dependent Claim
38 words
A control circuit as set forth in claim 21 further including means for preventing control pulses from occurring outside of the respective angular reference windows bounded by respective normally preceeding reference pulses and respective normally following reference pulses.
Claim 26
Dependent Claim
32 words
A control circuit as set forth in claim 21 including means for preventing the angle between the control pulse train and the reference pulse train from varying outside of predetermined angular limits.
Claim 27
Dependent Claim
33 words
A control circuit as set forth in claim 21 including means for preventing each control pulse from lagging the nearest preceeding reference pulse by an angle greater than 60* or less tha 0*.
Claim 28
Dependent Claim
40 words
A control circuit as set forth in claim 21 wherein the damping signal is a two-state signal the duty-cycle of which reflects the phase angle between the reference pulse train and the control pulse train on a substantially instantaneous basis.
Claim 29
Dependent Claim
157 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, means for generating a periodic reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, means for generating a periodic control pulse train that is locked in phase with a control voltage wave of the regulator circuit, means for generating a feedback signal that varies in accordance with the voltage at the output of the regulator circuit, means for applying the feedback signal to the control pulse generating means to vary the angle between the reference and control pulse trains, means for limiting the rate of change of the period of the control pulse train and means for applying the control pulse train to the regulator circuit to control the regulating activity thereof.
Claim 30
Dependent Claim
157 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, means for generating a periodic reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, means for generating a periodic control pulse train that is locked in phase with a control voltage wave of the regulator circuit, means for generating a feedback signal that varies in accordance with the voltage at the output of the regulator circuit, means for applying the feedback signal to the control pulse generating means to vary the angle between the reference and control pulse trains, means for limiting the rate of change of the period of the control pulse train and means for applying the control pulse train to the regulator circuit to control the regulating activity thereof.
Claim 31
Dependent Claim
39 words
A control circuit as set forth in claim 26 further including means for preventing any control pulse from occurring outside of the angular reference window bounded by the reference pulses which normally preceed and normally follow each control pulse.
Claim 32
Dependent Claim
36 words
A control circuit as set forth in claim 26 wherein the limiting means serves to spread a necessary change in the angle between the reference and control pulse trains over two or more successive control pulses.
Claim 33
Dependent Claim
214 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a control pulse train having a period that varies in accordance with the net signal at the input thereof, means for applying to the input of the control oscillator a feedback signal that varies in accordance with a signal at the output of the regulator circuit, each control pulse ordinarily occurring after a normally preceeding reference pulse and before a normally following reference pulse, and phase limiting means for fixing the control angle of the regulator circuit in accordance with the control pulse train when each control pulse occurs between the normally preceeding and the normally following reference pulses and for fixing the control angle of the regulator circuit in accordance with the reference pulse train when any control pulse occurs either after the normally following reference pulse or before the normally preceeding reference pulse.
Claim 34
Dependent Claim
214 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a control pulse train having a period that varies in accordance with the net signal at the input thereof, means for applying to the input of the control oscillator a feedback signal that varies in accordance with a signal at the output of the regulator circuit, each control pulse ordinarily occurring after a normally preceeding reference pulse and before a normally following reference pulse, and phase limiting means for fixing the control angle of the regulator circuit in accordance with the control pulse train when each control pulse occurs between the normally preceeding and the normally following reference pulses and for fixing the control angle of the regulator circuit in accordance with the reference pulse train when any control pulse occurs either after the normally following reference pulse or before the normally preceeding reference pulse.
Claim 35
Dependent Claim
44 words
A coNtrol circuit as set forth in claim 29, including means for restarting the control oscillator at approximately the beginning of its period when the phase limiting means fixes the control angle of the regulator circuit in accordance with a normally following reference pulse.
Claim 36
Dependent Claim
25 words
A control circuit as set forth in claim 30 wherein the restarting means comprises a speed-up switch connected to the input of the control oscillator.
Claim 37
Dependent Claim
54 words
A control circuit as set forth in claim 29 including means for suspending oscillatory activity in the control oscillator between the time that the control oscillator produces a control pulse and the time that the phase limiting means fixes the control angle of the regulator circuit in accordance with the normally preceeding reference pulse.
Claim 38
Dependent Claim
25 words
A control circuit as set forth in claim 32 wherein the suspending means comprises a hold switch connected to the input of the control oscillator.
Claim 39
Dependent Claim
54 words
A control circuit as set forth in claim 30 including means for suspending oscillatory activity in the control oscillator between the time that the control oscillator produces a control pulse and the time that the phase limiting means fixes the control angle of the regulator circuit in accordance with the normally preceeding reference pulse.
Claim 40
Dependent Claim
42 words
A control circuit as set forth in claim 34 wherein the restarting means comprises a speed-up switch connected to the input of the control oscillator and wherein the suspending means comprises a hold switch connected to the input of the control oscillator.
Claim 41
Dependent Claim
236 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle betweeen an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a periodic reference signal the transitions of which are locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic control signal the transitions of which occur at times that vary in accordance with the net signal applied to the input thereof, means for applying to the input of the control oscillator a feedback signal that varies in accordance with a signal at the output of the regulator circuit, each significant transition of the control signal ordinarily occurring within a respective angular reference window bounded by a predetermined number of degrees of lag behind the nearest preceeding significant transition of the reference signal, phase limiting means for fixing the control angle of the regulator circuit in accordance with the significant transitions of the control signal when each such transition occurs within its respective angular reference window and for fixing the control angle of the regulator circuit in accordance with the significant transitions of the reference signal when a significant transition of the control signal occurs outside of its respective angular reference window.
Claim 42
Dependent Claim
236 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle betweeen an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a periodic reference signal the transitions of which are locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic control signal the transitions of which occur at times that vary in accordance with the net signal applied to the input thereof, means for applying to the input of the control oscillator a feedback signal that varies in accordance with a signal at the output of the regulator circuit, each significant transition of the control signal ordinarily occurring within a respective angular reference window bounded by a predetermined number of degrees of lag behind the nearest preceeding significant transition of the reference signal, phase limiting means for fixing the control angle of the regulator circuit in accordance with the significant transitions of the control signal when each such transition occurs within its respective angular reference window and for fixing the control angle of the regulator circuit in accordance with the significant transitions of the reference signal when a significant transition of the control signal occurs outside of its respective angular reference window.
Claim 43
Dependent Claim
37 words
A control circuit as set forth in claim 36 including means for restarting the control oscillator at the beginning of its period when a significant transition of the control signal occurs after its respective angular reference window.
Claim 44
Dependent Claim
34 words
A control circuit as set forth in claim 36 including means for preventing the control oscillator from oscillating when a significant transition of the control signal occurs prior to its respective angular reference window.
Claim 45
Dependent Claim
34 words
A control circuit as set forth in claim 37 including means for preventing the control oscillator from oscillating when a significant transition of the control signal occurs prior to its respective angular reference window.
Claim 46
Dependent Claim
241 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a periodic reference pulse tRain that is locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control pulse train the repetition rate of which is determined by the net signal applied to the input thereof, means for applying to the input of the control oscillator aa feedback signal determined by the voltage at the output of the regulator circuit, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which pulses are applied ot the input thereof, means for generating a phase difference signal that varies with the angle between the reference pulses and the pulses at the input of the pulse distributing means, phase limiting means for preventing the phase angle between the reference pulses and the pulses at the input of the pulse distributing means from exceeding predetermined angular limits, the phase limiting means having a first input for receiving the reference pulse train, a second input for receiving the voltage control pulse train and a third input for receiving the phase difference signal.
Claim 47
Dependent Claim
241 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a reference oscillator for generating a periodic reference pulse tRain that is locked in phase with the voltage at the input of the regulator circuit, a control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control pulse train the repetition rate of which is determined by the net signal applied to the input thereof, means for applying to the input of the control oscillator aa feedback signal determined by the voltage at the output of the regulator circuit, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which pulses are applied ot the input thereof, means for generating a phase difference signal that varies with the angle between the reference pulses and the pulses at the input of the pulse distributing means, phase limiting means for preventing the phase angle between the reference pulses and the pulses at the input of the pulse distributing means from exceeding predetermined angular limits, the phase limiting means having a first input for receiving the reference pulse train, a second input for receiving the voltage control pulse train and a third input for receiving the phase difference signal.
Claim 48
Dependent Claim
43 words
A control circuit as set forth in claim 40 including means for restarting the control oscillator at the beginning of its period when the voltage control pulse train lags the reference pulse train by an angle in excess of the predetermined angular limit.
Claim 49
Dependent Claim
29 words
A control circuit as set forth in claim 40 including means for preventing the control oscillator from oscillating when the voltage control pulse train leads the reference pulse train.
Claim 50
Dependent Claim
29 words
A control circuit as set forth in claim 41 including means for preventing the control oscillator from oscillating when the voltage control pulse train leads the reference pulse train.
Claim 51
Dependent Claim
257 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control signal having a period that varies with the net signal applied to the input thereof, a current control oscillator having an input and an output and serving as means for generating at the output thereof a periodic current control signal having a period that varies with the net signal applied to the input thereof, voltage sensing means for applying to the input of the voltage control oscillator a signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for applying to the input of the current control oscillator a signal that varies in accordance with the current at the output of the regulator circuit, OR-ing means responsive to the voltage and current control oscillators for generating an oscillator control signal in accordance with the voltage control signal when the period of the voltage control signal is shorter than the period of the current control signal and for generating an oscillator control signal in accordance with the current control signal when the period of the current control signal is shorter than the period of the voltage control signal, and means for applying the oscillator control signal to the regulator circuit.
Claim 52
Dependent Claim
257 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control signal having a period that varies with the net signal applied to the input thereof, a current control oscillator having an input and an output and serving as means for generating at the output thereof a periodic current control signal having a period that varies with the net signal applied to the input thereof, voltage sensing means for applying to the input of the voltage control oscillator a signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for applying to the input of the current control oscillator a signal that varies in accordance with the current at the output of the regulator circuit, OR-ing means responsive to the voltage and current control oscillators for generating an oscillator control signal in accordance with the voltage control signal when the period of the voltage control signal is shorter than the period of the current control signal and for generating an oscillator control signal in accordance with the current control signal when the period of the current control signal is shorter than the period of the voltage control signal, and means for applying the oscillator control signal to the regulator circuit.
Claim 53
Dependent Claim
60 words
A control circuit as set forth in claim 44 including means for restarting the current control oscillator when the voltage control oscillator produces its output signal before the current control oscillator produces its output signal and for restarting the voltage control oscillator when the current control oscillator produces its output signal before the voltage control oscillator produces its output signal.
Claim 54
Dependent Claim
41 words
A control circuit as set forth in claim 44 including means for limiting the rate of change of the period of the voltage control oscillator and means for limiting the rate of change of the period of the current control oscillAtor.
Claim 55
Dependent Claim
87 words
A control circuit as set forth in claim 44 including a reference oscillator for generating a periodic reference signal that is locked in phase with the voltage at the input of the regulator circuit, and phase limiting means for fixing the control angle in accordance with the oscillator control signal when the latter signal falls within predetermined angular limits of the reference signal and for fixing the control angle in accordance with the reference signal when the oscillator control signal does not fall within said angular limits.
Claim 56
Dependent Claim
86 words
A control circuit as set forth in claim 46 including a reference oscillator for generating a periodic reference signal that is locked into phase with the voltage at the input of the regulator circuit, and means for fixing the control angle in accordance with the oscillator control signal when the latter signal falls within predetermined angular limits of the reference signal and for fixing the control angle in accordance with the reference signal when the oscillator control signal does not fall within said predetermined angular limits.
Claim 57
Dependent Claim
60 words
A control circuit as set forth in claim 45 wherein the restarting means for the current oscillator includes a speed-up switch connected to the input of the current oscillator and to the OR-ing means and wherein the restarting means for the voltage oscillator includes a speed-up switch connected to the input of the voltage oscillator and to the OR-ing means.
Claim 58
Dependent Claim
158 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator for generating a voltage control pulse train having a period that varies in accordance with the voltage at the output of the regulator circuit, a current control oscillator for generating a current control pulse train having a period that varies in accordance with the current at the output of the regulator circuit, and OR-ing means for applying a control pulse to the regulator circuit when, following the application of the last occurring control pulse thereto, a voltage control pulse occurs prior to a current control pulse, and for applying a control pulse to the regulator circuit when, following the application of the last occurring control pulse thereto, a current control pulse occurs prior to a voltage control pulse.
Claim 59
Dependent Claim
158 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator for generating a voltage control pulse train having a period that varies in accordance with the voltage at the output of the regulator circuit, a current control oscillator for generating a current control pulse train having a period that varies in accordance with the current at the output of the regulator circuit, and OR-ing means for applying a control pulse to the regulator circuit when, following the application of the last occurring control pulse thereto, a voltage control pulse occurs prior to a current control pulse, and for applying a control pulse to the regulator circuit when, following the application of the last occurring control pulse thereto, a current control pulse occurs prior to a voltage control pulse.
Claim 60
Dependent Claim
59 words
A control circuit as set forth in claim 50 including means for forcing the current oscillator into step with the voltage oscillator when a voltage control pulse occurs prior to a current control pulse and means for forcing the voltage oscillator into step with the current oscillator when a current control pulse occurs prior to a voltage control pulse.
Claim 61
Dependent Claim
229 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control signal having a period that varies with the net signal applied to the input thereof, a current control oscillator having an input and an output and serving as means for generating at the output thereof a periodic current control signal having a period that varies with the net signal applied to the input thereof, voltage sensing means for applying to the input of the voltage control oscillator a signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for applying to the input of the current control oscillator a signal that varies in accordance with the current at the output of the regulator circuit, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which control signals are applied to the input thereof, and OR-ing means connected to the voltage and current control oscillators for energizing the input of the pulse distributing means in accordance with the control signal having the shorter period.
Claim 62
Dependent Claim
229 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a voltage control oscillator having an input and an output and serving as means for generating at the output thereof a periodic voltage control signal having a period that varies with the net signal applied to the input thereof, a current control oscillator having an input and an output and serving as means for generating at the output thereof a periodic current control signal having a period that varies with the net signal applied to the input thereof, voltage sensing means for applying to the input of the voltage control oscillator a signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for applying to the input of the current control oscillator a signal that varies in accordance with the current at the output of the regulator circuit, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which control signals are applied to the input thereof, and OR-ing means connected to the voltage and current control oscillators for energizing the input of the pulse distributing means in accordance with the control signal having the shorter period.
Claim 63
Dependent Claim
66 words
A control circuit as set forth in claim 52 including means for restarting the current control oscillator when the voltage control oscillator produces a control signal having a period shorter than that produced by the current control oscillator and for restarting the voltage control oscillator when the current control oscillator produces a control signal having a period shorter than that produced by the voltage control oscillator.
Claim 64
Dependent Claim
45 words
A control circuit as set forth in claim 52 including current damping means for limiting the rate of change of the period of the current control oscillator and voltage damping means for limiting the rate of change of the period of the voltage control oscillator.
Claim 65
Dependent Claim
82 words
A control circuit as set forth in claim 54 wherein the current damping means includes an a-c coupling network connected to the input of the current control oscillator, wherein the voltage damping means includes an a-c coupling network connected to the input of the voltage control oscillator and wherein both of the coupling networks are supplied with a damping signal having a duty-cycle proportional with the phase angle between the voltage at the input of the regulator circuit and the control wave.
Claim 66
Dependent Claim
154 words
A control circuit as set forth in claim 55 in which each control oscillator includes: means for generating complementary signals that vary in accordance with the net signal at the input of the oscillator, an integrating network, switching means having a first state in which one of the complementary signals is applied to the integrating network and a second state in which the other of the complementary signals is applied to the integrating network, positive comparing means for establishing a positive integrating limit for the integrating network, negative comparing means for establishing a negative integrating limit for the integrating network, a flip-flop, means for connecting the positive comparing means to one input of the flip-flop, means for connecting the negative comparing means to the other input of the flip-flop, means for connecting the flip-flop in switching control relationship to the switching means, and means for connecting the flip-flop to the output of the oscillator.
Claim 67
Dependent Claim
59 words
A control circuit as set forth in claim 52 including a reference oscillator for generating a reference signal that is locked in phase with the voltage at the input of the regulator circuit and means for preventing the angle between the signal at the input of the pulse distributing means and the reference signal from exceeding predetermined angular limits.
Claim 68
Dependent Claim
41 words
A control circuit as set forth in claim 57 including means for limiting the rate of change of the period of the current control oscillator and means for limiting the rate of change of the period of the current control oscillator.
Claim 69
Dependent Claim
194 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a control pulse train having a period that varies with the net signal applied to the input thereof, voltage sensing means for establishing an analog voltage control signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for establishing an analog current control signal that varies in accordance with the current at the output of the regulator circuit, OR-ing means for applying to the input of the control oscillator the analog control signal having the higher amplitude, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which control signals are applied to the input thereof, and means for connectIng the output of the control oscillator to the input of the pulse distributing means to control the regulating activity of the regulator circuit.
Claim 70
Dependent Claim
194 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, a control oscillator having an input and an output and serving as means for generating at the output thereof a control pulse train having a period that varies with the net signal applied to the input thereof, voltage sensing means for establishing an analog voltage control signal that varies in accordance with the voltage at the output of the regulator circuit, current sensing means for establishing an analog current control signal that varies in accordance with the current at the output of the regulator circuit, OR-ing means for applying to the input of the control oscillator the analog control signal having the higher amplitude, pulse distributing means for controlling the phase position of the control wave in accordance with the times at which control signals are applied to the input thereof, and means for connectIng the output of the control oscillator to the input of the pulse distributing means to control the regulating activity of the regulator circuit.
Claim 71
Dependent Claim
24 words
A control circuit as set forth in claim 59 including means for limiting the rate of change of the period of the control oscillator.
Claim 72
Dependent Claim
26 words
A control circuit as set forth in claim 59 wherein the OR-ing means comprised a pair of diodes connected to the input of the control oscillator.
Claim 73
Dependent Claim
156 words
A control circuit as set forth in claim 59 in which the control oscillator includes: means for generating complementary signals that vary in accordance with the net signal at the input of the control oscillator, an integrating network, switching means having a first state in which one of the complementary signals is applied to the integrating network and a second state in which the other of the complementary signals is applied to the integrating network, positive comparing means for establishing a positive integrating limit for the integrating network, negative comparing means for establishing a negative integrating limit for the integrating network, a flip-flop, means for connecting the positive comparing means to one input of the flip-flop, means for connecting the negative comparing means to the other input of the flip-flop, means for connecting the flip-flop in switching control relationship to the switching means, and means for connecting the flip-flop to the output of the control oscillator.
Claim 74
Dependent Claim
57 words
A control circuit as set forth in claim 62 including means for generating a two-state damping signal that substantially instantaneously reflects changes in the phase angle between the voltage at the input of the regulator circuit and the control voltage wave and a-c coupling means for applying the damping signal to the input of the control oscillator.
Claim 75
Dependent Claim
111 words
A control circuit as set forth in claim 59 including a reference oscillator for generating a reference pulse train the pulses of which are locked in phase with the voltage at the input of the regulator circuit and phase-limiting means for energizing the input of the pulse distributing means in accordance with the control pulse train when the angle between the control pulse train and the reference pulse train is within predetermined angular limits and for energizing the input of the pulse distributing means in accordance with the reference pulse train when the angle between the control pulse train and the reference pulse train is not within said predetermined angular limits.
Claim 76
Dependent Claim
111 words
A control circuit as set forth in claim 60 including a reference oscillator for generating a reference pulse train the pulses of which are locked in phase with the voltage at the input of the regulator circuit and phase-limiting means for energizing the input of the pulse distributing means in accordance with the control pulse train when the angle between the control pulse train and the reference pulse train is within predetermined angular limits and for energizing the input of the pulse distributing means in accordance with the reference pulse train when the angle between the control pulse train and the reference pulse train is not within said predetermined angular limits.
Claim 77
Dependent Claim
54 words
A control circuit as set forth in claim 64 including means for restarting the control oscillator at the beginning of its period when the input of the pulse distributing means is energized in accordance with the reference pulse train because a control pulse has occurred too late to fall within said predetermined angular limits.
Claim 78
Dependent Claim
34 words
A control circuit as set forth in claim 64 including means for suspending pulse generating activity in the control oscillator when a control pulse occurs too soon to fall within said predetermined angular limits.
Claim 79
Dependent Claim
49 words
A control circuit as set forth in claim 63 including means for applying a bias current to the input of the control oscillator, the change in current produced by a change of state in the damping signal being on the order of three to ten times the bias current.
Claim 80
Dependent Claim
225 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, reference pulse generating means for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, voltage sensing means for generating a voltage feedback signal that varies in accordance with the voltage at the output of the regulator circuit, control pulse generating means for generating a control pulse train having a controllable period, means for connecting the voltage sensing means to the control pulse generating means to control the period thereof in accordance with the voltage feedback signal, pulse distributing means for fixing the phase position of the control wave in accordance with the times at which pulses are applied to the input thereof, phase limiting means for allowing control pulses to propagate from the control pulse generating means to the input of the pulse distributing means when the control pulse train bears a permissible phase relationship to the reference pulse train and for allowing reference pulses to propagate from the reference pulse generating means to the input of the pulse distributing means when the control pulse train does not bear a permissible phase relationship to the reference pulse train.
Claim 81
Dependent Claim
225 words
A circuit for controlling a regulator circuit of the type which controls its output voltage and current by varying the control angle between an a-c input voltage wave and a control voltage wave comprising, in combination, reference pulse generating means for generating a reference pulse train that is locked in phase with the voltage at the input of the regulator circuit, voltage sensing means for generating a voltage feedback signal that varies in accordance with the voltage at the output of the regulator circuit, control pulse generating means for generating a control pulse train having a controllable period, means for connecting the voltage sensing means to the control pulse generating means to control the period thereof in accordance with the voltage feedback signal, pulse distributing means for fixing the phase position of the control wave in accordance with the times at which pulses are applied to the input thereof, phase limiting means for allowing control pulses to propagate from the control pulse generating means to the input of the pulse distributing means when the control pulse train bears a permissible phase relationship to the reference pulse train and for allowing reference pulses to propagate from the reference pulse generating means to the input of the pulse distributing means when the control pulse train does not bear a permissible phase relationship to the reference pulse train.
Claim 82
Dependent Claim
58 words
A control circuit as set forth in claim 69 including current sensing means for generating a current feedback signal that varies in accordance with the current at the output of the regulator circuit and means for connecting the current sensing means to control pulse generating means to control the period thereof in accordance with the current feedback signal.
Claim 83
Dependent Claim
29 words
A control circuit as set forth in claim 70 wherein the means for connecting the voltage and current sensing means to the control pulse generating means comprise respective diodes.
Claim 84
Dependent Claim
31 words
A control circuit as set forth in claiam 69 including means responsive to the control angle for limiting the rate of change of the period of the control pulse generating means.
Claim 85
Dependent Claim
31 words
A control circuit as set forth in claiam 69 including means responsive to the control angle for limiting the rate of change of the period of the control pulse generating means.
Claim 86
Dependent Claim
58 words
A control circuit as set forth in claim 69 which includes means for generating a phase difference signal that is indicative of the control angle and in which the phase limiting means includes an input for receiving the control pulse train, an input for receiving the reference pulse train and an input for receiving the phase difference signal.
Claim 87
Dependent Claim
71 words
A control circuit as set forth in claim 73 wherein the phase difference signal is a two-state signal which assumes a first state between the times that reference pulses occur and the times that pulses appear at the input of the pulse distributing means and which assumes a second state between the times that pulses appear at the input of the pulse distributing means and the times that reference pulses occur.
Claim 88
Dependent Claim
161 words
A control circuit as set forth in claim 74 wherein the phase limiting means includes first switching means for allowing a control pulse to propagate from the control pulse generating means to the pulse distributing means when the phase difference signal is in the first state at the time that the control pulse generating means generates that control pulse, second switching means for allowing a reference pulse to propagate from the reference pulse generating means to the pulse distributing means when the phase difference signal is in the first state at the time that the reference pulse generating means generates that reference pulse, and third switching means for storing the fact that a control pulse has occurred when the phase difference signal is in the second state at the time that the control pulse generating means generates that control pulse and for applying a pulse to the pulse distributing means at the time of occurrence of the next occurring reference pulse.
Claim 89
Dependent Claim
61 words
A control circuit as set forth in claim 72 in which the limiting means includes means for generating a two-state damping signal the transitions of which are inItiated by the reference pulse train and by the pulses appearing at the input of the pulse distributing means, and a-c coupling means for applying the damping signal to the control pulse generating means.
References Cited (Backward Citations)
US3466525A
Cited
US3525035A
Cited
US3605003A
Cited
US3538412A
Cited
US3576443A
Cited
US3745437A
Cited
US3824443A
Cited
US3725766A
Cited
US3876922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |