US3573591A
Expired / Lapsed
US
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Proportional speed floating controller
Assignee: SPX Technologies Inc
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Filing: 1969-08-08
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Granted: 1971-04-06
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Expires: 1989-08-08
Abstract
Abstract Solid-state proportional speed floating controllers employing an integrating amplifier in the feed-forward path and a tachometer generator for producing a velocity feedback signal. The final controlling element is positioned by a DC or universal motor which also drives the tachometer and which is supplied with power through a static switch which is gated by a static trigger. The firing angle of the trigger is controlled by an RC timing circuit that receives line synchronized voltage pulses on which is superimposed the output voltage of the amplifier.
Inventors
- 👤 Quentin C Turtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1445; G05D3/1454; G05D3/1463; G05D3/1472; G05D3/18; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
In a proportional speed floating controller including: a. a final controlling element (13) for varying a directly controlled variable; b. an electric motor (14,15) for positioning the final controlling element; c. reference-input and feedback signal-generating means (12 and 47) for supplying signals indicative, respectively, of the desired and actual values of the directly controlled variable; d. summation means (39) for algebraically combining said signals to produce an actuating error signal; and e. control means (16-19, 21- 25) for the motor which responds to the magnitude and sense of the actuating error signal and which includes amplifying means for said signal; the improvement which comprises: 1. an integrating network (44,45) associated with the amplifying means and serving to make the time rate of change of its output dependent upon its input; and 2. a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summation means a signal which varies with the velocity of the motor and which opposes the reference-input signal.
Claim 2
Dependent Claim
165 words
In a proportional speed floating controller including: a. a final controlling element (13) for varying a directly controlled variable; b. an electric motor (14,15) for positioning the final controlling element; c. reference-input and feedback signal-generating means (12 and 47) for supplying signals indicative, respectively, of the desired and actual values of the directly controlled variable; d. summation means (39) for algebraically combining said signals to produce an actuating error signal; and e. control means (16-19, 21- 25) for the motor which responds to the magnitude and sense of the actuating error signal and which includes amplifying means for said signal; the improvement which comprises: 1. an integrating network (44,45) associated with the amplifying means and serving to make the time rate of change of its output dependent upon its input; and 2. a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summation means a signal which varies with the velocity of the motor and which opposes the reference-input signal.
Claim 3
Dependent Claim
33 words
a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summation means a signal which varies with the velocity of the motor and which opposes the reference-input signal.
Claim 4
Dependent Claim
33 words
a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summation means a signal which varies with the velocity of the motor and which opposes the reference-input signal.
Claim 5
Dependent Claim
35 words
An improved controller as defined in claim 1 in which the velocity signal generator (46,59,61) produces a signal which is proportional to motor velocity and includes a means (61) for varying the factor of proportionality.
Claim 6
Dependent Claim
47 words
a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summing means a second DC feedback voltage which varies in polarity and magnitude with the direction of movement and speed of the motor and which acts in opposition to said reference voltage.
Claim 7
Dependent Claim
47 words
a velocity signal generator (46,59,61) driven by the motor and connected to supply to the summing means a second DC feedback voltage which varies in polarity and magnitude with the direction of movement and speed of the motor and which acts in opposition to said reference voltage.
Claim 8
Dependent Claim
54 words
An improved controller as defined in claim 2 in which: a. the amplifying means includes an operational amplifier (25); and b. the integrating network comprises a feedback path interconnecting the output and negative input connections (33 and 31) of the amplifier (25) and containing a resistor (44) and a capacitor (45) arranged in series.
Claim 9
Dependent Claim
162 words
In a proportional speed floating controller including: a. a final controlling element (13) for varying a directly controlled variable; b. a DC or universal electric motor (14,15) for positioning the final controlling element and which is connected with an AC power sourcE through static, gate-controlled power-switching means (16); c. static triggering means (21) for gating said switching means and associated with a timing network (22,23) which controls its firing angle; d. means (24) for supplying to said timing network voltage pulses of regulated magnitude which are in synchronism with the AC power; e. means (12 and 47) for producing DC reference and feedback voltages indicative, respectively, of desired and actual values of said variable; f. summing means (39) for algebraically combining the reference and feedback voltages and producing an actuating error signal; and g. amplifying means connected to receive the error signal and supply to the timing network a DC control voltage which varies with the error signal; the improvement which comprises:
Claim 10
Dependent Claim
162 words
In a proportional speed floating controller including: a. a final controlling element (13) for varying a directly controlled variable; b. a DC or universal electric motor (14,15) for positioning the final controlling element and which is connected with an AC power sourcE through static, gate-controlled power-switching means (16); c. static triggering means (21) for gating said switching means and associated with a timing network (22,23) which controls its firing angle; d. means (24) for supplying to said timing network voltage pulses of regulated magnitude which are in synchronism with the AC power; e. means (12 and 47) for producing DC reference and feedback voltages indicative, respectively, of desired and actual values of said variable; f. summing means (39) for algebraically combining the reference and feedback voltages and producing an actuating error signal; and g. amplifying means connected to receive the error signal and supply to the timing network a DC control voltage which varies with the error signal; the improvement which comprises:
Claim 11
Dependent Claim
34 words
An improved controller as defined in claim 4 in which the velocity signal generator (46,59,61) produces a signal which is proportional to motor velocity and includes means (61) for varying the factor of proportionality.
Claim 12
Dependent Claim
54 words
An improved controller as defined in claim 4 in which: a. the amplifying means includes an operational amplifier (25); and b. the integrating network comprises a feedback path interconnecting the output and negative input connections (33 and 31) of the amplifier (25) and containing a resistor (44) and a capacitor (45) arranged in series.
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 |