Title :
A Family of Isolated Interleaved Boost and Buck Converters With Winding-Cross-Coupled Inductors
Author :
Li, Wuhua ; He, Xiangning
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
A boost-type converter is derived by inserting a third winding of the winding-cross-coupled inductors (WCCIs) between the secondary winding and the output diode of the interleaved flyback converter in this paper. A family of isolated interleaved boost or buck DC/DC converters with WCCIs is summarized by employing the four main types of interleaved structures, which is suitable for step-up or step-down isolated distribution power systems. Then, an interleaved flyback-boost converter with WCCIs and an active clamp circuit is analyzed as an example to explore the advantages of the derived converters. The active clamp scheme is adopted to recycle the leakage energy and to suppress the turn-off voltage spikes on MOSFETs. And only one set of active clamp circuit is necessary for the interleaved two phases. Zero voltage transition (ZVT) soft switching performances are achieved for all MOSFETs during the whole switching transition. Furthermore, the output diode turn-off current falling rate is controlled by the inherent leakage inductance of the WCCIs, and the output diode reverse-recovery problem is alleviated. A clear picture is made in this paper of the general law and structure of the isolated interleaved dc/dc converters with WCCIs. At last, a 650 W prototype with 48 V-to-180 V is built and tested to verify the theoretical analysis in this paper.
Keywords :
DC-DC power convertors; clamps; inductors; machine windings; power MOSFET; power distribution; MOSFET; active clamp circuit; buck DC-DC converter; current falling rate; interleaved flyback converter; isolated interleaved boost converter; leakage energy; leakage inductance; power 650 W; reverse-recovery problem; step-down isolated distribution power system; step-up isolated distribution power system; switching transition; voltage 48 V to 180 V; winding-cross-coupled inductor; zero voltage transition; Active clamp; interleaved converter; winding-cross-coupled inductor (WCCI);
Journal_Title :
Power Electronics, IEEE Transactions on
Conference_Location :
12/9/2008 12:00:00 AM
DOI :
10.1109/TPEL.2008.2004767