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New switching control for synchronous rectifications in low-voltage paralleled converter system without voltage and current fluctuations

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5 Author(s)

Synchronous rectifiers (SRs) used in paralleled converter system cause several problems such as surge voltage, inhalation current and return current. Normally, to avoid the problems, SR operation is stopped in light load. However, at the same time, voltage fluctuation occurs, which causes serious errors in semiconductor devices such as CPU and LSI operating with very low voltage. Moreover, unstable current fluctuation occurs due to the voltage fluctuation in the paralleled system with current-sharing control. This paper proposes new switching control methods for rectifiers to reduce the voltage and current fluctuations. Experimental results are shown to confirm the effectiveness of the proposed methods.

Published in:

Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual  (Volume:1 )

Date of Conference:

15-19 June 2003

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