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Interleaved High Step-Up Converter With Winding-Cross-Coupled Inductors and Voltage Multiplier Cells

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4 Author(s)
Wuhua Li ; Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China ; Yi Zhao ; Jiande Wu ; Xiangning He

The concept of winding-cross-coupled inductors (WCCIs) and voltage multiplier cells is integrated to derive a novel interleaved high step-up converter in this paper. The voltage gain is extended and the switch voltage stress is reduced by the WCCIs and the voltage multiplier cells in the presented circuit, which minimizes the peak current ripple of the power devices and makes low-voltage MOSFETs with high performance available in high step-up and high output voltage applications. Moreover, the output diode reverse-recovery problem is alleviated by the leakage inductance of the WCCIs, which reduces the reverse-recovery losses. Zero current switching (ZCS) turn-on is realized for the power switches to reduce the switching losses. Furthermore, the voltage spikes on the MOSFETs are clamped and the leakage energy is recycled by the voltage multiplier cells, when the switch turns off. A 1 kW prototype with 35-45 V input and 380 V output operating at 50 kHz switching frequency is built and tested to verify the significant improvements of the proposed converter.

Published in:

Power Electronics, IEEE Transactions on  (Volume:27 ,  Issue: 1 )

Date of Publication:

Jan. 2012

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