Title :
High-voltage-input, low-voltage-output, series-connected converters with uniform voltage distribution
Author :
Siri, Kasemsan ; Willhoff, Michael ; Conner, Kenneth A. ; Tran, Duc Q.
Author_Institution :
Aerosp. Corp., El Segundo, CA
Abstract :
This paper presents a power system consisting of current-mode, shared-bus converters configured as Series-Input, Parallel-Output (SIPO). These current-mode commercial-off-the-shelf (COTS) dc-dc converters transform a 1kV system input voltage into a 5V output with up to 500 Watts of power. The SIPO power system provides for system expansion and preserves the standalone converter´s efficiency of over 80%. Uniform input voltage distribution control improves power system reliability by distributing thermal stresses equally among the series-connected converters. Furthermore, robust system stability and uniform input voltage distribution among series-connected converters is realized without control conflict. A computer simulation and an experimental 1 kV 500 W prototype were successfully implemented to validate the uniform voltage distribution power converter architecture.
Keywords :
DC-DC power convertors; power system reliability; COTS; SIPO power system; current-mode commercial-off-the-shelf dc-dc converters; current-mode shared-bus converters; high-voltage-input series-connected converters; input voltage distribution; low-voltage-output series-connected converters; power 100 W; power system reliability; series-input parallel-output; uniform voltage distribution; uniform voltage distribution power converter architecture; voltage 1 kV; Control systems; DC-DC power converters; Power system control; Power system reliability; Power system stability; Power systems; Robust stability; Stress control; Thermal stresses; Voltage control;
Conference_Titel :
Aerospace conference, 2009 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
978-1-4244-2621-8
Electronic_ISBN :
978-1-4244-2622-5
DOI :
10.1109/AERO.2009.4839519