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一种新颖的升压型电压调整器—两相交错并联耦合电感BOOST变换器.PDF
26 9 Vol.26 No.9 May 2006
2006 5 Proceedings of the CSEE ©2006 Chin.Soc.for Elec.Eng.
0258-8013 (2006) 09-0094-05 TM624 A 470.40
BOOST
( 310027)
A Novel Step-up VRM—Two-phase Interleaved Coupled-boost Converter
HU Qing-boQU BoLÜ Zheng-yu
National Key Laboratory of Power ElectronicsZhejiang UniversityZhejiang ProvinceHangzhou 310027China
ABSTRACT: The natural life of battery cell is longer than
battery group used in series, but battery cell voltage is so low.
As for this problem, this paper introduces a step-up circuit,
0
named two-phase interleaved coupled-Boost converter, and
different output voltage can be acquired by changing turns ratio
of coupled inductor. Two-phase boost converter operates at a
very large duty cycle because voltage gain is high. Using
coupled-boost topology can extend duty cycle, but it has a huge
voltage spike across MOSFET due to inductor energy. This
paper proposes a clamping scheme that the power switches of
their own channels serve as the active clamping switches for
neighbor channels in a two-phase interleaved coupled-boost
converter, and only adding a capacitor can realize active
clamping function. Both analysis and experiment have shown
that it has good effect for restraining spike voltage in a
two-phase couple
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