Open AccessInterleaved non‐isolated high step‐up DC/DC converter based on the diode–capacitor multiplier
Author(s) -
Zhou Luowei,
Zhu Binxin,
Luo Quanming,
Chen Si
Publication year - 2014
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.2013.0124
Subject(s) - voltage multiplier , ripple , duty cycle , boost converter , inductor , capacitor , interleaving , pulse width modulation , ćuk converter , flyback converter , voltage , diode , electrical engineering , high voltage , forward converter , computer science , materials science , electronic engineering , engineering , voltage regulation , dropout voltage
A kind of interleaved non‐isolated high step‐up DC/DC converter is presented in this study. The converter consists of two basic Boost cells and some diode–capacitor multiplier (DCM) cells as needed. Because of the DCM cells, the voltage conversion ratio is enlarged and the extreme large duty ratio can be avoided in the high step‐up applications. Moreover, the voltage stress of all the power devices is greatly lower than the output voltage. As a result, lower‐voltage‐rated power devices can be employed, and higher efficiency can be expected. Since the two basic Boost cells are controlled by the interleaving method, which means the phase difference between the two pulse width moderlation (PWM) signals is 180° and the input current is the sums of the two inductor currents, the input current ripple is decreased and the size of the input filter could be reduced, which make it a suitable choice in the photovoltaic power generation system and hybrid electric vehicles, etc. Finally, the experimental results from a 300 W, 30–400 V laboratory prototype are presented to validate the effectiveness of the proposed converter.