Synchronized switched mode power supplies
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United States of America Patent
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-
Sep 3, 1991
Issued Date -
N/A
app pub date -
Jun 13, 1986
filing date -
Mar 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention reduces the ripple component of current in the alternating current to, or direct current from, a common power source providing direct current power to a plurality of switched dc/dc power supplies by controlling the time of occurrence of switching of each of the supplies. Each dc/dc power supply is controlled by a switch pulse from a switching circuit which determines the occurrence and duration of time during which each power supply is switched 'on'. The time of occurence of the switch pulse of each switching circuit is determined by the application of an individual synchronizing pulse to each switching circuit. The combined effect of the ripple components of currents provided to the switched power supplies is minimized by summing these currents with appropriately phased synchronizing pulses applied to the switching circuits.
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