Open AccessHigh step‐up Z‐source DC–DC converter with coupled inductors and switched capacitor cell
Author(s) -
Poorali Behzad,
Torkan Arash,
Adib Ehsan
Publication year - 2015
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2014.0200
Subject(s) - ćuk converter , boost converter , forward converter , inductor , switched capacitor , flyback converter , buck–boost converter , charge pump , electrical engineering , capacitor , diode , electronic engineering , voltage , polarity (international relations) , voltage multiplier , integrating adc , buck converter , materials science , voltage source , computer science , engineering , chemistry , dropout voltage , biochemistry , cell
Z‐source converter has several advantages such as high‐voltage gain, clamped switch voltage and positive output voltage polarity. This study presents a new non‐isolated high step‐up DC–DC converter which is derived from Z‐source converter and provides higher‐voltage gain compared with its conventional counterpart. Owing to its high‐voltage conversion ratio, the proposed converter is a proper choice for photovoltaic applications. Furthermore, reverse‐recovery problems caused by the output diode are reduced in the proposed converter which reduces the switching losses. In addition, the leakage energy is recycled so the conversion efficiency is improved. Analysis and operating principles of the proposed converter are discussed and design guidelines are presented. Moreover, the effect of non‐ideal elements on the proposed converter performance is analysed. A 100 W laboratory prototype to convert 20–300 V is implemented and experimental results are presented to verify theoretical analysis.