Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1993-09-30
1995-01-31
Stephan, Steven L.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323282, GF5
Patent
active
053861876
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.
REFERENCES:
patent: 4234842 (1980-11-01), Brennen et al.
patent: 4825351 (1989-04-01), Uesugi
patent: 5003454 (1991-03-01), Bruning
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patent: 5293077 (1994-03-01), Seki et al.
patent: 5309082 (1994-03-01), Payne
Siemens Components May 1988 (Bock), TDA 4918/4919 "New Generation of Control ICS For Switched-Mode Power Supplies."
Siemens AG TDA 4700, pp. 182-231 "Integrated Control Circuits For Single Phase and Push-Pull Switch . . . ".
Siemens AG TDA 4818/4819 pp. 242-261 "Integrated Control Circuits".
Bichler Helmut
Herfurth Michael
Greenberg Laurence A.
Lerner Herbert L.
Nguyen Matthew
Siemens Aktiengesellschaft
Stephan Steven L.
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