US3869658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct curent supply with ribble suppression
Assignee: Telefunken Computer GmbH
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Filing: 1973-09-18
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Granted: 1975-03-04
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Expires: 1993-09-18
Abstract
Abstract A circuit arrangement for supplying a direct current, which is free from interruptions, from an alternating line current. The circuit includes: a first rectifier which initially rectifies the line current; an energy store, which helps compensate for variations in the rectified voltage; an inverter for chopping up the recitified voltage; a transformer; a second rectifier arrangement; a smoothing filter; and a control device. The voltage which is generated at the output of the smoothing filter is fed to the direct current load. When the voltage across the direct current load falls below a rated value, a first electrical switching device provides an extra current to the direct current load. On the other hand, when the voltage across the direct current load increases above the rated value, a second electrical switching device diverts a portion of the current through the direct current load. In this manner, any changes in the current and voltage across the load are compensated.
Inventors
- 👤 Martin Hanke
- 👤 Hans Stiefken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:41
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/62; H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/285
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
259 words
In a circuit arrangement for supplying an interruption-free current for a direct current load, the arrangement including a first rectifier, connected to receive an alternating supply voltage, for rectifying the supply voltage; an energy store coupled to the output of the first rectifier for storing the rectified voltage; inverting means with phase cut control for chopping up the rectified voltage into an alternating voltage; a transformer with a primary winding coupled to the inverting means for receiving the chopped voltage and a first secondary winding with both the primary and secondary windings having center taps; a second rectifier coupled to the first secondary winding of the transformer for rectifying the chopped voltage; a smoothing filter coupled to the output of the second rectifier and having its output connected to the direct current load; and control means for monitoring the current and voltage values at the direct current load and for controlling the inverting means in dependence upon these values; the improvement comprising: first electrical switching means coupled to the output of said control means and connected for providing an extra current to said direct current load in response to control signals received from said control means when the voltage across said direct current load falls below a rated value; and second electrical switching means coupled to the output of said control means and connected for diverting a portion of the current through said direct current load in response to control signals received from said control means when the voltage across said direct current load increases above a rated value.
Claim 2
Dependent Claim
259 words
In a circuit arrangement for supplying an interruption-free current for a direct current load, the arrangement including a first rectifier, connected to receive an alternating supply voltage, for rectifying the supply voltage; an energy store coupled to the output of the first rectifier for storing the rectified voltage; inverting means with phase cut control for chopping up the rectified voltage into an alternating voltage; a transformer with a primary winding coupled to the inverting means for receiving the chopped voltage and a first secondary winding with both the primary and secondary windings having center taps; a second rectifier coupled to the first secondary winding of the transformer for rectifying the chopped voltage; a smoothing filter coupled to the output of the second rectifier and having its output connected to the direct current load; and control means for monitoring the current and voltage values at the direct current load and for controlling the inverting means in dependence upon these values; the improvement comprising: first electrical switching means coupled to the output of said control means and connected for providing an extra current to said direct current load in response to control signals received from said control means when the voltage across said direct current load falls below a rated value; and second electrical switching means coupled to the output of said control means and connected for diverting a portion of the current through said direct current load in response to control signals received from said control means when the voltage across said direct current load increases above a rated value.
Claim 3
Dependent Claim
30 words
A circuit arrangement as defined in claim 1 wherein said first electrical switching means is a series voltage regulator and said second electrical switching means is a shunt voltage regulator.
Claim 4
Dependent Claim
94 words
A circuit arrangement as defined in claim 2 wherein said series regulator includes a first transistor having its base coupled to an output of said control means such that said first transistor is switched into its conductive state in dependence upon the current and voltage values monitored by said control means and said shunt regulator includes a second transistor having its base coupled to an output of said control means such that said second transistor is switched into its conductive state in dependence upon the current and voltage values monitored by said control means.
Claim 5
Dependent Claim
146 words
A circuit arrangement as defined in claim 3, further comprising an auxiliary voltage source; and wherein: said first transistor of said series regulator has its collector-emitter path coupled between the output of said auxiliary voltage source and said direct current load such that when said first transistor is switched into its conductive state by said control means, said auxiliary source supplies current into said direct current load; and said second transisttor of said shunt regulator has its collector-emitter path connected in parallel with said direct current load such that when said second transistor is switched into its conductive state by said control means, it divertS a portion of the current through said direct current load and produces a voltage drop across a resistance network formed by said inverter, said transformer and said second rectifier so as to reduce the output voltage across said direct current load.
Claim 6
Dependent Claim
48 words
A circuit arrangement as defined in claim 4 wherein said auxiliary voltage source comprises a second secondary winding inductively coupled with said primary winding of said transformer and a third rectifier coupled between the output of said second secondary winding and said collector-emitter path of said first transistor.
Claim 7
Dependent Claim
24 words
A circuit arrangement as defined in claim 2 wherein said series voltage regulator includes a switching regulator having a switching transistor and an inductor.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |