Patent US3601688A successfully refreshed from Google Patents.
US3601688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator for permanent magnet generators
Assignee: Motorola Solutions Inc
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Filing: 1970-01-28
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Granted: 1971-08-24
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Expires: 1990-01-28
Abstract
Abstract A voltage regulator circuit having an input terminal for connection to the output of a permanent magnet generator which develops a voltage at its output variable in frequency and amplitude in response to the speed of rotation of the generator. A current control device is arranged to switchably connect the output of the generator to a desired load in response to trigger pulses which are generated at desired phase angles during each half cycle of a given polarity of the applied voltage. The output of the voltage regulator may be free of an external power source, and in such case, means are provided to always establish at least a minimum current flow at the output of the regulator during no load conditions to effect continuous operation of the regulator for all voltage values at the output of the generator.
Inventors
- 👤 Peter Dogadko
- 👤 Forbes D Gilchrist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:14
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A voltage regulator circuit comprising, in combination, input terminal means for connection to a source of variable amplitude alternating current voltage, output terminal means for delivering load current to a load, said load current being variable in accordance with load demands, a current control device having load electrodes connected between said input and output terminal means and further having a control electrode, a control circuit coupled to said control electrode to apply triggering pulses thereto at points in time corresponding to the phase angle at which said current control device is to be rendered conductive, a first sensing circuit connected to said control circuit for causing a phase angle shift of said triggering pulses in response to variations of input amplitude of the alternating current voltage, and a second sensing circuit connected to said control circuit for causing a phase angle shift of said triggering pulses in response to variations of load current through said output terminal means.
Claim 2
Dependent Claim
158 words
A voltage regulator circuit comprising, in combination, input terminal means for connection to a source of variable amplitude alternating current voltage, output terminal means for delivering load current to a load, said load current being variable in accordance with load demands, a current control device having load electrodes connected between said input and output terminal means and further having a control electrode, a control circuit coupled to said control electrode to apply triggering pulses thereto at points in time corresponding to the phase angle at which said current control device is to be rendered conductive, a first sensing circuit connected to said control circuit for causing a phase angle shift of said triggering pulses in response to variations of input amplitude of the alternating current voltage, and a second sensing circuit connected to said control circuit for causing a phase angle shift of said triggering pulses in response to variations of load current through said output terminal means.
Claim 3
Dependent Claim
146 words
The voltage regulator circuit of claim 1 wherein said control circuit includes a unijunction transistor having first and second base electrodes connected to receive current from said input terminal, said second base electrode coupled to said control electrode of said current control device, a variable reference voltage means responsive to the variable amplitude alternating current voltage and to the load current passing through said output terminal means and coupled to the emitter electrode of said unijunction transistor to control conduction thereof and produce triggering pulses between 0* phase angle of the applied variable amplitude alternating current voltage and a predetermined degree of phase angle beyond 90*, and a second reference voltage means connected across the base electrodes of said unijunction transistor to limit the value of said predetermined degree of phase angle beyond 90* by limiting the voltage applied across said first and second base electrodes.
Claim 4
Dependent Claim
23 words
The voltage regulator circuit of claim 2 wherein said variable reference means has a voltage value less than said second reference voltage means.
Claim 5
Dependent Claim
45 words
The voltage regulator circuit of claim 3 wherein said variable reference voltage means has a voltage value which varies within a range of 6 to 14 volts, and said second reference voltage means has a voltage value in a range of 12 to 24 volts.
Claim 6
Dependent Claim
30 words
The voltage regulator circuit of claim 2 wherein said second base electrode of said unijunction transistor is coupled to said control electrode of said current control device through a capacitor.
Claim 7
Dependent Claim
47 words
The voltage regulator circuit of claim 1 wHerein said control circuit includes a unijunction transistor having first and second base electrodes arranged to receive current from said input terminal means, said second base electrode coupled to said control electrode of said current control device through a capacitor.
Claim 8
Dependent Claim
87 words
The current control device of claim 1 wherein said first sensing circuit includes resistance means connected in series with first and second capacitors and arranged for connection to receive current from said input terminal means, a third capacitor having one end thereof connected to said input terminal and the other end thereof connected between said first and second capacitors, and means coupling the change on said first and second capacitors to said control circuit to produce a triggering pulse therefrom in response to the desired phase angle.
Claim 9
Dependent Claim
18 words
The voltage regulator circuit of claim 2 wherein said predetermined degree of phase angle beyond 90* is 120*.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |