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A new high step-up voltage ratio soft switching PWM boost DC-DC power converter with edge resonant switched capacitor modular

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3 Author(s)
Mishima, T. ; Grad. Sch. of Maritime Sci., Kobe Univ., Kobe, Japan ; Takeuchi, Y. ; Nakaoka, M.

This paper presents a new soft switching PWM non-isolated boost DC-DC converter embedding an edge resonant switched capacitor (ER-SWC) modular. The soft switching PWM boost DC-DC converter treated here can achieve a high frequency zero current switching (ZCS) turn-on and zero voltage switching (ZVS) turn-off operations in active switches and minimize a reverse recovering current in the freewheeling diode under DCM including CRM conditions in the input inductor current. Those advantageous properties enable a wide range of soft switching operations together with a high step-up voltage conversion ratio due to the edge resonance in the ER-SWC modular, which results in the high efficiency power conversion. For demonstrating the effectiveness of the new soft switching PWM boost DC-DC converter, a 1kW-40kHz laboratory prototype is evaluated in experiments, followed by the design guideline of the DC-DC converter and a theoretical analysis. Then, the performances of the proposed soft switching PWM boost DC-DC converter are discussed from a practical point of view.

Published in:

Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on

Date of Conference:

Aug. 30 2011-Sept. 1 2011

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