ABSTRACT:
Most of two-stage converters for electric bike
battery charging comprise of boost converter for PFC followed by dc-dc converter
with universal-input voltage. These two-stage conversions suffer from poor
efficiency and increased component count. In this paper, a single- stage
switched inductor Cuk converter based power factor correction converter is
proposed which offers high step-down gain, low current stress, high efficiency
and reduced component counts. The operational analysis and design equations for
various components of proposed converter are carried out in continuous current
mode (CCM). This paper presents mathematical modelling, analysis, simulation
and experimentation on proposed converter rated for 500 W, 48V/10.4A. The
performance investigation of proposed converter with respect to power quality
indices like voltage THD, current THD and total power factor are carried out
with various types of load such as resistive load and battery load in both constant
voltage (CV) and constant current (CC). Furthermore, the dynamic performance of
proposed converter with battery charging is investigated in constant voltage
mode and constant current mode with respect to wide change of supply
variations.
KEYWORDS:
1.
Diode Bridge Rectifier
2.
DC bus
3.
Power Factor Correction
4.
Harmonics
5.
Cuk converter
6.
Battery charging
SOFTWARE:
MATLAB/SIMULINK
CONCLUSION:
The
switched inductor Cuk converter based improved power quality AC-DC converter is
proposed for battery charging application. The design, simulation and hardware implementation
of proposed converter are carried out. The simulation results are obtained under
various loading conditions and results demonstrate that the proposed converter is
able to provide regulated output voltage irrespective of supply and load
variations. The power quality indices like THD and PF at ac side are evaluated
to assess the power quality performance of the converter. The converter is evaluated
both under steady state and transient conditions. In battery charging
application, the power quality indices are also evaluated both in CV and CC
mode of battery charging and recorded. The simulation is validated with
hardware implementation of same specifications. The experimental results showed
good steady state and transient performance under load and source voltage
disturbances. Therefore, it is well suited for various applications requiring
power at high current at reduced output voltage such as battery charging for electric
vehicles / EHV.
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[1]
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[2]
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[3]
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[5]
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