In this study, presents a new high step-up interleaved dc-dc converter for renewable applications.
engineering
Description
High step-up
interleaved dc/dc converter with
high
efficiency
vinod kumar chinthada
department of electrical engineering,
National Institute of Technology , Rourkela,
National
Institute of Technology, Sector 1, Rourkela,
Odisha 769008
Email:vinod.chinthada@gmail.com
ABSTRACT
In this paper, a new
non-isolated Interleaved dc/dc converter with highvoltageconversion ratio is
presented. The proposed converter combined with interleaved converter
techniques and voltage multiplier cell (diode/ capacitor/inductor). The voltage
stress across the power semiconductors (power MOSFETs/diodes) is decreased
compared to SEPIC, conventional
boost converter. The
low normalized stress causes to using the low rating semiconductors. In fact,
the overall efficiency of the proposed converter will be increased by using
MOSFETs with lower resistance RDS(on) and lower ranges for power diodes. To
confirm the accuracy theoretical analysis of the proposed converter and
operation converter, a laboratory prototype in about 190 W with operating at 40
kHz is built and tested.
KEYWORDS
Non-isolated; dc/dc
converter; interleaved;
highvoltage
gain; low-voltage
stress
INTRODUCTION
In this study, presents a new high
step-up interleaved dc-dc converter for renewable applications. The proposed
converter based on combination of the voltage multiplier units and interleaved techniques,
also consist of low input current ripple which capable to obtain high-voltage
gain and high power level. In addition, the normalized voltage stress across
the power MOSFETs and power diodes is low due to the utilization of voltage
multiplier units which this leads to the voltage of power semiconductors clamp
to capacitors of voltage multiplier units. As a result, using the power MOSFETs
and power diodes with low rating (low current/voltage) causes to decrease the
total power losses of the system. Also, using a power MOSFET with lower on
state resistance Rds(on) leads to decrease the cost and increase the efficiency
of the converter.
