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

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

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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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