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Master/Slave Control of Input-Series- and Output-Parallel-Connected Converters: Concept for Low-Cost High-Voltage Auxiliary Power Supplies

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1 Author(s)
Petar J. Grbovic ; R&D, Schneider Toshiba Inverter Eur., Pacy-sur-Eure

This paper deals with low-cost high input voltage auxiliary power supplies. The objective of the paper is to give an overview of the existing solutions, and then present a new, efficient, and cost-effective solution. The proposed solution is based on input-series- and output-parallel (ISOP)-connected converters topology and simple decoupled master/slave control strategy. The main output voltage is controlled by the master converter, while the input voltages and output currents are controlled and balanced by the slave converter. The ISOP topology has two important advantages, namely the use of two series-connected rated for lower voltage converters gives a significant reduction of the switch-mode power supply overall cost and size, and loss free balancing of the voltages of the input serially connected filter capacitors. The proposed solution is theoretically analyzed and experimentally verified on a laboratory setup. The experimental results are presented and discussed.

Published in:

IEEE Transactions on Power Electronics  (Volume:24 ,  Issue: 2 )