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US3597631A
Expired / Lapsed
US
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Firing-angle control circuit
Assignee: Dale Valve Co
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Filing: 1968-09-20
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Granted: 1971-08-03
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Expires: 1988-09-20
Abstract
Abstract A firing-angle control circuit having means for generating a ramp control voltage and for utilizing an electronic switching means to compare the ramp voltage with the instantaneous value of an error signal. Whenever an error signal bears a predetermined relationship to the instantaneous amplitude of the ramp signal, the switching means is deenergized and the signal source is coupled to the load. The ramp control voltage is phase related to the signal source, and hence the comparison between the ramp voltage and the source signal provides a means for controlling the firing angle of a switching means which regulates the application of the source to the load.
Inventors
- 👤 George H Fathauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:10
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/081
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A control circuit for regulating the firing angle of an energizing source in response to variations in an error signal comprising: means for generating a control voltage having an amplitude which varies continuously over a portion of a cycle of said energizing source, an electronic switching means having first and second inputs and an output, means for coupling said control voltage to one of said inputs, means for coupling said error signal to the other of said inputs, said electronic switching means comparing said first and second inputs and generating an output in response to a difference therebetween, a load, triggering means to control the angle of conduction of a signal coupled to the load, and means responsive to the output of said electronic switching means to control the operation of said triggering means.
Claim 2
Dependent Claim
134 words
A control circuit for regulating the firing angle of an energizing source in response to variations in an error signal comprising: means for generating a control voltage having an amplitude which varies continuously over a portion of a cycle of said energizing source, an electronic switching means having first and second inputs and an output, means for coupling said control voltage to one of said inputs, means for coupling said error signal to the other of said inputs, said electronic switching means comparing said first and second inputs and generating an output in response to a difference therebetween, a load, triggering means to control the angle of conduction of a signal coupled to the load, and means responsive to the output of said electronic switching means to control the operation of said triggering means.
Claim 3
Dependent Claim
34 words
A control circuit in accordance with claim 1 wherein said means for generating a control voltage comprises: means for generating a substantial ramp voltage having an amplitude which varies at a substantially constant rate.
Claim 4
Dependent Claim
29 words
A control circuit in accordance with claim 2 wherein said ramp voltage has an initial maximum amplitude and decreases at a substantially constant rate to a terminal minumum amplitude.
Claim 5
Dependent Claim
75 words
A control circuit in accordance with claim 3 wherein said means for generating said control voltage comprises: a further electronic switching device having first and second inputs and an output, an AC signal associated with said energizing source being coupled to said first input, a DC signal being coupled to said second input, and means coupled to said output for developing a decaying signal in response to the energizing of said further electronic switching device.
Claim 6
Dependent Claim
21 words
A control circuit in accordance with claim 4 wherein said means for developing a decaying signal comprises a parallel RC network.
Claim 7
Dependent Claim
18 words
A control circuit in accordance with claim 1 wherein said triggering means includes a three-terminal negative-resistance electronic device.
Claim 8
Dependent Claim
197 words
A control circuit for regulating the firing angle of an energizing source in response to variations in an error signal comprising: a first electronic switching means having associated first and second inputs and an output, an AC signal associated with said energizing source being coupled to said first input, a DC signal being coupled to said second input and a decaying signal means being coupled to said output, a second electronic switching means having associated first and second inputs and a output, a firing circuit for controlling the angle of conduction of a signal coupled to the load, means for coupling the output of said decaying signal means to one of said inputs of said second electronic switching means, meaNs for coupling the error signal to the other of said inputs, said second electronic switching means comparing the error signal and the decaying signal and having means for coupling the output thereof to said firing circuit, said firing circuit controlling the duty cycle of said energizing source, and said firing circuit including a control terminal being energizable by the change of state of said second electronic switching means, and controlling the firing angle of said firing circuit.
Claim 9
Dependent Claim
197 words
A control circuit for regulating the firing angle of an energizing source in response to variations in an error signal comprising: a first electronic switching means having associated first and second inputs and an output, an AC signal associated with said energizing source being coupled to said first input, a DC signal being coupled to said second input and a decaying signal means being coupled to said output, a second electronic switching means having associated first and second inputs and a output, a firing circuit for controlling the angle of conduction of a signal coupled to the load, means for coupling the output of said decaying signal means to one of said inputs of said second electronic switching means, meaNs for coupling the error signal to the other of said inputs, said second electronic switching means comparing the error signal and the decaying signal and having means for coupling the output thereof to said firing circuit, said firing circuit controlling the duty cycle of said energizing source, and said firing circuit including a control terminal being energizable by the change of state of said second electronic switching means, and controlling the firing angle of said firing circuit.
Claim 10
Dependent Claim
41 words
A control circuit in accordance with claim 7 wherein said first electronic switching means generates a pulse and wherein said pulse is integrated by said decaying circuit to provide a ramp signal at the input of said second electronic switching means.
Claim 11
Dependent Claim
44 words
A control circuit in accordance with claim 8 wherein means are provided at said second electronic switching means to compare a function of said error signal with the instantaneous level of said ramp signal to thereby control the duty cycle of said energizing source.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |