Patent US2938816A successfully refreshed from Google Patents.
US4356403A
Expired / Lapsed
US
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Masterless power supply arrangement
Assignee: Elsag International BV
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Filing: 1981-02-20
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Granted: 1982-10-26
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Expires: 2001-02-20
Abstract
Abstract A power supply arrangement is disclosed wherein the power supplies (12, 14) share the power requirements of a common load (20) approximately equally and wherein either of the power supplies (12, 14) can act as the "master" while the other power supply acts as the "slave". The arrangement utilizes an integrating differential error amplifier (54), an inverting amplifier (56), and a non-inverting amplifier (58) which are electrically connected between the common load (20) and the power supplies (12, 14) to detect any difference in the output current of the power supplies (12, 14) due to a difference in output voltage, and correct same by increasing the output voltage of the power supply having the lower output voltage until the difference is eliminated. In this manner, either power supply (12, 14) can act as the "master" while the other power supply acts as the "slave".
Inventors
- 👤 William D. Mohat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:26
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/59
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, means for detecting the existence of a difference in the output current (due to a difference in the output voltages) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supplies, and means responsive to said signal produced by said detecting means causing the output voltage of one of said first and second power supply means to change so as to be approximately equal to the output voltage of the other of said first and second power supply means.
Claim 2
Dependent Claim
140 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, means for detecting the existence of a difference in the output current (due to a difference in the output voltages) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supplies, and means responsive to said signal produced by said detecting means causing the output voltage of one of said first and second power supply means to change so as to be approximately equal to the output voltage of the other of said first and second power supply means.
Claim 3
Dependent Claim
50 words
The power supply apparatus as defined in claim 1 wherein said signal responsive means causes the output voltage of said power supply means having the lower output voltage to increase so as to be approximately equal to the output voltage of said power supply means having the higher output voltage.
Claim 4
Dependent Claim
49 words
The power supply apparatus as defined in claim 1 wherein said signal responsive means is comprised of an inverting device and a non-inverting device, said inverting and non-inverting devices being electrically connected to said detecting means and being separately actuatable depending upon said signal produced by said detecting means.
Claim 5
Dependent Claim
24 words
The power supply apparatus as defined in claim 3 wherein said inverting and non-inverting devices are designed so that simultaneous operation thereof is prevented.
Claim 6
Dependent Claim
26 words
The power supply apparatus as defined in claim 1 wherein said first and second power supply means approximately equally supply electrical power to said common load.
Claim 7
Dependent Claim
19 words
The power supply apparatus as defined in claim 1 wherein said detecting means is an integrating differential amplifying device.
Claim 8
Dependent Claim
155 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, said first and second power supply means approximately equally supplying electrical power to said common load, means for detecting the existence of a difference in the output current (due to a difference in output voltage) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supply means, and means responsive to said signal produced by said detecting means causing the output voltage of said power supply means having the lower output voltage to increase so as to be approximately equal to the output voltage of said power supply means having the higher output voltage.
Claim 9
Dependent Claim
155 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, said first and second power supply means approximately equally supplying electrical power to said common load, means for detecting the existence of a difference in the output current (due to a difference in output voltage) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supply means, and means responsive to said signal produced by said detecting means causing the output voltage of said power supply means having the lower output voltage to increase so as to be approximately equal to the output voltage of said power supply means having the higher output voltage.
Claim 10
Dependent Claim
177 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, said first and second power supply means approximately equally supplying electrical power to said common load, means for detecting the existence of a difference in the output current (due to a difference in output voltage) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supply means, and means responsive to said signal produced by said detecting means, said signal responsive means comprising an inverting device and a non-inverting device electrically connected to said detecting means and being separately actuatable causing the output voltage of said power supply means having the lower output voltage to increase so as to be approximately equal to the output voltage of said power supply means having the higher output voltage.
Claim 11
Dependent Claim
177 words
A power supply apparatus for supplying electrical power to a common load comprising a first power supply means electrically connected to said common load, a second power supply means electrically connected to said common load, said first and second power supply means approximately equally supplying electrical power to said common load, means for detecting the existence of a difference in the output current (due to a difference in output voltage) of said first and second power supply means, said detecting means being electrically connected to said common load and producing a signal proportional to said difference in said output voltage of said first and second power supply means, and means responsive to said signal produced by said detecting means, said signal responsive means comprising an inverting device and a non-inverting device electrically connected to said detecting means and being separately actuatable causing the output voltage of said power supply means having the lower output voltage to increase so as to be approximately equal to the output voltage of said power supply means having the higher output voltage.
References Cited (Backward Citations)
US3704381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |