Patent US4754493A successfully refreshed from Google Patents.
US3602801A
Expired / Lapsed
US
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Switching voltage and current regulator controller
Assignee: United States Department of the Navy
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Filing: 1970-04-27
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Granted: 1971-08-31
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Expires: 1990-04-27
Abstract
Abstract A switching voltage and current regulator controller having an isolation transformer coupling a supply voltage to a load with an isolation amplifier in a feedback loop to deliver error information from the secondary back to the primary while maintaining the required primary-secondary isolation, the error information being proportional to the pulse width in the pulse train transferred through the coupling transformer.
Inventors
- 👤 James A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:23
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3385
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
200 words
A switching voltage and current regulator controller comprising: an isolation transformer having a primary circuit and two secondary circuits, said primary circuit being coupled to a source of electrical energy and one of said secondaries being coupled to an electrical load; a solid state power switch in said primary circuit having a control electrode; a solid state driver switch in the other secondary circuit having an output coupled to said control electrode of the power switch and having a control electrode; a feedback circuit having a sensing means coupled to said one of said secondary circuits and an output coupled to said control electrode of said driver switch through an isolation amplifier, said sensing means sensing the pulse width of voltage signals in said one secondary proportional to the voltage error above and below a predetermined value and converting same to a voltage proportional to the load voltage error, and said feedback circuit having a nonfeedback condition when said secondary circuits fly back and collapse to zero voltage; and means to reset said feedback circuit at intervals to said nonfeedback condition to sense rapid changes in load demands whereby the voltage and current demands are met by the supply voltage.
Claim 2
Dependent Claim
200 words
A switching voltage and current regulator controller comprising: an isolation transformer having a primary circuit and two secondary circuits, said primary circuit being coupled to a source of electrical energy and one of said secondaries being coupled to an electrical load; a solid state power switch in said primary circuit having a control electrode; a solid state driver switch in the other secondary circuit having an output coupled to said control electrode of the power switch and having a control electrode; a feedback circuit having a sensing means coupled to said one of said secondary circuits and an output coupled to said control electrode of said driver switch through an isolation amplifier, said sensing means sensing the pulse width of voltage signals in said one secondary proportional to the voltage error above and below a predetermined value and converting same to a voltage proportional to the load voltage error, and said feedback circuit having a nonfeedback condition when said secondary circuits fly back and collapse to zero voltage; and means to reset said feedback circuit at intervals to said nonfeedback condition to sense rapid changes in load demands whereby the voltage and current demands are met by the supply voltage.
Claim 3
Dependent Claim
35 words
A switching voltage and current regulator controller as set forth in claim 1 wherein said solid state power switch and solid state driver switch are transistors and said control electrodes thereof are the base electrodes.
Claim 4
Dependent Claim
77 words
A switching voltage and current regulator controller as set forth in claim 2 wherein said feedback circuit sensing means is a differential amplifier which senses the amplitude difference of voltage signals on said one secondary with respect to a reference voltage for a time period corresponding to pulse width stored in a capacitor storage element, said stored amount of voltage being operative through said isolation amplifier to be applied to said control electrode of said driver transistor.
Claim 5
Dependent Claim
51 words
A switching voltage and current regulator controller as set forth in claim 3 wherein said means to reset said feedback circuit consists of a pair of diodes having the anodes thereof coupled in common to said one secondary and the cathodes coupled respectively to opposite plates of said capacitor storage element.
Claim 6
Dependent Claim
52 words
A switching voltage and currenT regulator controller as set forth in claim 1 wherein said feedback circuit is through a differential amplifier, a pulse width modulator, said isolation amplifier, a pulse width demodulator, and a transistor amplifier, in that order from said one secondary to said control electrode of said driver switch.
Claim 7
Dependent Claim
91 words
A switching voltage and current regulator controller as set forth in claim 5 wherein said pulse width modulator includes a pair of diodes, a storage capacitor, and a transistor, said pair of diodes having their anodes coupled in common to said one secondary and their cathodes coupled respectively across said storage capacitor, and the base electrode of said transistor being coupled to the output of said differential amplifier and one plate of said storage capacitor with the emitter and collector terminals thereof coupled between said one secondary and said isolation amplifier.
Claim 8
Dependent Claim
77 words
A switching voltage and current regulator controller as set forth in claim 6 wherein said pulse width demodulator includes a low pass filter coupled between said isolation amplifier and said transistor amplifier and a diode and capacitor in series between said other secondary and a fixed potential providing peak detection of the voltage in said other secondary, said peak detected voltage applied from the juncture of said diode and capacitor as supply voltage to said transistor amplifier.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |