Analysis, Design, and Performance Evaluation of Droop Current-Sharing Method
Abstract -The droop current sharing method is analyzed, and a
general design procedure is proposed. It is shown that the
current-sharing accuracy of N+1 power supplies is a function of
the output-voltage set-point accuracy, the slope of the outputvoltage
droop, and gains of the control loop. It was found that to
achieve a current sharing accuracy of 10% the output voltage of
the paralleled power supplies needs to be set within 0.35%. The
accuracy of the design procedure was compared against
measured results of three power supplies operating in parallel.
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