Transcript Project Progress Report

06117333
Chanwoo Kwon
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Model the ultracapacitor.
Build a DC/DC Converter to charge the
ultracapacitor from a 12V battery.
Model a load such as a motor in
Matlab/Simulink.
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Model : HIP-210NKHB5
Cell efficieny: 18.9%
Module efficiency:16.4%
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A maximum power point tracker (or MPPT) is
a high efficiency DC to DC converter that
presents an optimal electrical load to a solar
panel
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RC parallel branch model
RC transmission line model
RC series-parallel branch model
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Each RC branch has a different time constant.
The fast-term branch dominates the charge and discharge behavior in the
order of a few seconds.
The medium-term branch dominates the behavior over the scale of minutes.
Finally the slow-term branch governs the long-term charge and discharge
characteristics.
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This model simulates the ultracapacitor’s physical structure and
electromechanical characteristics directly.
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RC parallel branch model reflects the internal
charge distribution process very well.
Good response of the ultracap’s dynamic
behavior during charging and discharging.
Accuracy is better and not complex.
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diL/dt=(Vs-Vo)/L s=1(switch on) - (1)
diL/dt=(-Vo)/L
s=0(switch off) - (2)
From (1) and (2),
diL/dt=(SVs-Vo)/Lo
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Input voltage Vin=12V
Output voltage Vout=2.7*3=8.1V
Variation input voltage=+9¬15V
R=10
L=0.3m
C=0.2m
Frequency=100khz -> T=1/100k=0.01
D=Vout/Vin=8.1/12=0.675
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Decide a motor required high starting current
and connect it with ultracapacitor model.
Decide each value such as
inductor,capacitor,resistance to operate this
motor efficiently.
Simulate a Simulink/MATLAB model of the
complete system.