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Series SEPIC implementing voltage-lift technique for DC-DC power conversion

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2 Author(s)
M. Zhu ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore ; F. L. Luo

The voltage-lift technique is an effective method that could be applied in electronic circuit design. A set of positive output DC-DC converters applying series SEPIC implementing voltage-lift techniques is introduced. Compared with the prototype of the SEPIC converter, these converters can perform positive to positive DC-DC voltage increasing conversion with higher voltage transfer gains. They are different from other existing DC-DC step-up converters and possess obvious advantages, mainly including fewer switches, clear conversion processes and a high output voltage with small ripples. Since the proposed converters avoid using transformers and cascade connection, relative simple structures are beneficial to potential practical applications in future. A detailed theoretical analysis for continuous and discontinuous conduction modes is given. Both simulation and experimental results are provided to verify the main characteristics.

Published in:

IET Power Electronics  (Volume:1 ,  Issue: 1 )