US3836839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled apparatus for silicon controlled rectifiers
Assignee: TUC IND Inc
•
Filing: 1972-11-14
•
Granted: 1974-09-17
•
Expires: 1992-11-14
Abstract
Abstract Control apparatus for controlled rectifier battery chargers and battery eliminators includes a reference voltage source, error amplifiers for voltage and current control, apparatus comparing error voltage with a ramp voltage synchronized with the power line frequency, and apparatus triggered by the voltage comparator generating a train of gating pulses for silicon controlled rectifiers and the like.
Inventors
- 👤 R Becky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:16
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/081; H02M1/0003; H02M1/0025; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H02M7/1557
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
182 words
In an apparatus for producing gate firing pulses for a silicon controlled rectifier or the like, including a pulse train generator, a ramp voltage generator synchronized with the power line frequency and means for applying the ramp voltage to the input of the pulse train generator adjusted to trigger the pulse train generator when the ramp voltage exceeds a control voltage also applied to the input of the pulse train generator, the improvement comprising means for deriving a control error voltage proportional to the difference between a portion of the output voltage of the rectifier and a reference voltage, those means including a potentiometer connected across the output of the rectifier, means for deriving a control error voltage proportional to the output current of the rectifier, those means including a resistor adapted to be connected at one end to a load and at the other end to one junction of the potentiometer and rectifier output, and operational amplifier means having both control error voltages applied in parallel to one input and its output connected to the input of the pulse train generator.
Claim 2
Dependent Claim
182 words
In an apparatus for producing gate firing pulses for a silicon controlled rectifier or the like, including a pulse train generator, a ramp voltage generator synchronized with the power line frequency and means for applying the ramp voltage to the input of the pulse train generator adjusted to trigger the pulse train generator when the ramp voltage exceeds a control voltage also applied to the input of the pulse train generator, the improvement comprising means for deriving a control error voltage proportional to the difference between a portion of the output voltage of the rectifier and a reference voltage, those means including a potentiometer connected across the output of the rectifier, means for deriving a control error voltage proportional to the output current of the rectifier, those means including a resistor adapted to be connected at one end to a load and at the other end to one junction of the potentiometer and rectifier output, and operational amplifier means having both control error voltages applied in parallel to one input and its output connected to the input of the pulse train generator.
Claim 3
Dependent Claim
19 words
Apparatus of claim 1 in which the reference voltage is connected to the other input of the operational amplifier.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |