US5386187A
Expired / Lapsed
US
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Method for anticipatory control of a switched-mode power supply for compensating for fluctuations in feed voltage and circuit configuration for performing the method
Assignee: Siemens AG
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Filing: 1993-09-30
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Granted: 1995-01-31
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Expires: 2013-09-30
Abstract
Abstract A switched-mode power supply for compensating for fluctuations in a feed voltage includes at least one electronic switch and a control circuit with a frequency generator, a comparator circuit, and a trigger circuit. The trigger circuit furnishes a trigger signal for the electronic switch as a function of an output signal of the comparator circuit and an output signal of the frequency generator. The comparator circuit has a switching threshold being defined as a function of a load current of the switched-mode power supply. The comparator circuit has a signal input being triggered with a periodically rising and falling control signal having a frequency defined by the frequency generator. The control signal has a signal shape being varied as a function of an instantaneous value of a feed voltage of the switched-mode power supply. In a method for anticipatory control of the power supply for compensating for feed voltage fluctuations, the control signal has a direct component and an alternating component, and only the direct component of the control signal is varied as a function of fluctuations of the feed voltage of the power supply.
Inventors
- 👤 Helmut Bichler
- 👤 Michael Herfurth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/563; H02M1/00; H02M1/0003; H02M1/0016; H02M1/0022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
In a method for anticipatory control of a switched-mode power supply for compensating for fluctuations in a feed voltage, wherein the switched-mode power supply includes: at least one electronic switch; and a control circuit with a frequency generator, a comparator circuit, and a trigger circuit; the trigger circuit furnishing a trigger signal for the at least one electronic switch as a function of an output signal of the comparator circuit and an output signal of the frequency generator; the comparator circuit having a switching threshold being defined as a function of a load current of the switched-mode power supply; the comparator circuit having a signal input being triggered with a periodically rising and falling control signal having a frequency defined by the frequency generator; and the control signal having a signal shape being varied as a function of an instantaneous value of a feed voltage of the switched-mode power supply, the improvement which comprises: defining a relatively higher frequency of the control signal with the signal generator, as compared with a frequency of the feed voltage; and varying only a direct voltage component of the periodically rising and falling control signal having a direct voltage component and an alternating voltage component, as a function of fluctuations of the feed voltage of the switched-mode power supply.
Claim 2
Dependent Claim
215 words
In a method for anticipatory control of a switched-mode power supply for compensating for fluctuations in a feed voltage, wherein the switched-mode power supply includes: at least one electronic switch; and a control circuit with a frequency generator, a comparator circuit, and a trigger circuit; the trigger circuit furnishing a trigger signal for the at least one electronic switch as a function of an output signal of the comparator circuit and an output signal of the frequency generator; the comparator circuit having a switching threshold being defined as a function of a load current of the switched-mode power supply; the comparator circuit having a signal input being triggered with a periodically rising and falling control signal having a frequency defined by the frequency generator; and the control signal having a signal shape being varied as a function of an instantaneous value of a feed voltage of the switched-mode power supply, the improvement which comprises: defining a relatively higher frequency of the control signal with the signal generator, as compared with a frequency of the feed voltage; and varying only a direct voltage component of the periodically rising and falling control signal having a direct voltage component and an alternating voltage component, as a function of fluctuations of the feed voltage of the switched-mode power supply.
Claim 3
Dependent Claim
25 words
The method according to claim 1, which comprises imparting a sawtooth shape on the alternating voltage component of the periodically rising and falling control signal.
Claim 4
Dependent Claim
220 words
In a switched-mode power supply having at least one electronic switch, a control circuit for compensating for fluctuations in a feed voltage, comprising: a frequency generator supplying an output signal, a comparator circuit supplying an output signal, a trigger circuit connected to said frequency generator, to said comparator circuit and to the at least one electronic switch, and a circuit element furnishing a periodically rising and falling control signal with a frequency defined by said frequency generator; said trigger circuit furnishing a trigger signal for the at least one electronic switch as a function of the output signal of said comparator circuit and the output signal of said frequency generator; said comparator circuit having a switch threshold being defined as a function of a load current of the switched-mode power supply; said comparator circuit having a signal input being triggered with the periodic control signal; and the control signal having a signal shape being varied as a function of an instantaneous value of the feed voltage of the switched-mode power supply, the control signal including a direct voltage component and an alternating voltage component, and said circuit element furnishing the control signal having a circuit configuration for varying the direct voltage component of the control signal as a function of fluctuations in the feed voltage of the switched-mode power supply.
Claim 5
Dependent Claim
220 words
In a switched-mode power supply having at least one electronic switch, a control circuit for compensating for fluctuations in a feed voltage, comprising: a frequency generator supplying an output signal, a comparator circuit supplying an output signal, a trigger circuit connected to said frequency generator, to said comparator circuit and to the at least one electronic switch, and a circuit element furnishing a periodically rising and falling control signal with a frequency defined by said frequency generator; said trigger circuit furnishing a trigger signal for the at least one electronic switch as a function of the output signal of said comparator circuit and the output signal of said frequency generator; said comparator circuit having a switch threshold being defined as a function of a load current of the switched-mode power supply; said comparator circuit having a signal input being triggered with the periodic control signal; and the control signal having a signal shape being varied as a function of an instantaneous value of the feed voltage of the switched-mode power supply, the control signal including a direct voltage component and an alternating voltage component, and said circuit element furnishing the control signal having a circuit configuration for varying the direct voltage component of the control signal as a function of fluctuations in the feed voltage of the switched-mode power supply.
Claim 6
Dependent Claim
25 words
The control circuit according to claim 3, wherein said frequency generator furnishes both a rectangular signal and a ramp-shaped signal having the same period duration.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |