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US4468722A
Expired / Lapsed
US
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Power supply having slope controlled output volt-ampere characteristic
Assignee: Marconi Communications Inc
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Filing: 1982-07-28
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Granted: 1984-08-28
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Expires: 2002-07-28
Abstract
Abstract A circuit for use in the voltage control loop of a power supply of the type which regulates its output voltage to a predetermined amplitude to allow at least two of the supplies to be connected by an associated series diode to the same external load so as to share that load on a substantially equal basis and avoid false indications of supply malfunction that may result from that connection at no load. In a first embodiment, the circuit controls the slope of the volt-ampere characteristic by linearly changing at the input to the voltage regulating means the signal representative of output voltage as a function of supply output current. In a second embodiment, the circuit controls the shape of the volt-ampere characteristic at no load by changing the predetermined amplitude to which the output voltage is regulated. The supply also includes a preload which is inserted in parallel with the external load.
Inventors
- 👤 Neil A. Kammiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:11
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33507; H02M3/33515
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A circuit for use in a power supply to control the slope of its output volt-ampere characteristic so as to allow at least two of said supplies to share a load on a substantially equal basis said supply deriving a signal representative of its output voltage and having a regulation means responsive to said output representative signal to thereby regulate said output voltage to a predetermined amplitude said voltage representative signal being connected to said regulation means at a predetermined junction, said circuit comprising: (a) means responsive to the output current of said supply to derive a d-c signal representative thereof; and (b) modifying means connected to said predetermined junction and responsive to said current representative signal for generating at said junction a signal which changes linearly with changes in said output current, said voltage representative signal changing in a linear manner opposite to the change in said modifying means signal to thereby keep the sum of said signals at said junction constant whereby said slope is controlled.
Claim 2
Dependent Claim
168 words
A circuit for use in a power supply to control the slope of its output volt-ampere characteristic so as to allow at least two of said supplies to share a load on a substantially equal basis said supply deriving a signal representative of its output voltage and having a regulation means responsive to said output representative signal to thereby regulate said output voltage to a predetermined amplitude said voltage representative signal being connected to said regulation means at a predetermined junction, said circuit comprising: (a) means responsive to the output current of said supply to derive a d-c signal representative thereof; and (b) modifying means connected to said predetermined junction and responsive to said current representative signal for generating at said junction a signal which changes linearly with changes in said output current, said voltage representative signal changing in a linear manner opposite to the change in said modifying means signal to thereby keep the sum of said signals at said junction constant whereby said slope is controlled.
Claim 3
Dependent Claim
47 words
The circuit of claim 1 wherein said output current responsive means includes transformer means connected to said supply in a manner so as to derive an a-c signal representative of said output current and peak charging means responsive to said a-c signal for generating said d-c signal.
Claim 4
Dependent Claim
28 words
The circuit of claim 1 or 2 wherein said modifying means includes a discrete resistor having a predetermined resistance and having one end connected to said predetermined junction.
Claim 5
Dependent Claim
28 words
The circuit of claim 3 wherein said modifying means further includes voltage following means for connecting the other end of said resistor to said output current responsive means.
Claim 6
Dependent Claim
179 words
A power supply which controls the slope of its output volt-ampere characteristic in a manner so as to allow at least two of said supplies to share a load on a substantially equal basis comprising: (a) means responsive to the output voltage of said supply for deriving a signal representative thereof; (b) means responsive to said voltage representative signal and a signal representing a predetermined amplitude of said output voltage to thereby regulate said output voltage to have said predetermined amplitude said voltage representative signal being connected to said regulation means at a predetermined junction; (c) means responsive to the output current of said supply to derive an a-c signal representative thereof; and (d) modifying means connected to said predetermined junction and responsive to said current representative signal for generating at said junction a signal which changes linearly with changes in said output current, said voltage representative signal changing in a linear manner opposite to the change in said modifying means signal to thereby keep the sum of said signals at said junction constant whereby said slope is controlled.
Claim 7
Dependent Claim
179 words
A power supply which controls the slope of its output volt-ampere characteristic in a manner so as to allow at least two of said supplies to share a load on a substantially equal basis comprising: (a) means responsive to the output voltage of said supply for deriving a signal representative thereof; (b) means responsive to said voltage representative signal and a signal representing a predetermined amplitude of said output voltage to thereby regulate said output voltage to have said predetermined amplitude said voltage representative signal being connected to said regulation means at a predetermined junction; (c) means responsive to the output current of said supply to derive an a-c signal representative thereof; and (d) modifying means connected to said predetermined junction and responsive to said current representative signal for generating at said junction a signal which changes linearly with changes in said output current, said voltage representative signal changing in a linear manner opposite to the change in said modifying means signal to thereby keep the sum of said signals at said junction constant whereby said slope is controlled.
Claim 8
Dependent Claim
47 words
The circuit of claim 5 wherein said output current responsive means includes transformer means connected to said supply in a manner so as to derive an a-c signal representative of said output current and peak charging means responsive to said a-c signal for generating said d-c signal.
Claim 9
Dependent Claim
28 words
The circuit of claim 5 or 6 wherein said modifying means includes a discrete resistor having a predetermined resistance and having one end connected to said predetermined junction.
Claim 10
Dependent Claim
28 words
The circuit of claim 7 wherein said modifying means further includes voltage following means for connecting the other end of said resistor to said output current responsive means.
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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |