Chanwoo Kwon

 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.

 Model : HIP-210NKHB5  Cell efficieny: 18.9%  Module efficiency:16.4%

 A maximum power point tracker (or MPPT) is a high efficiency DC to DC converter that presents an optimal electrical load to a solar panelefficiencyDC to DC convertersolar panel

 RC parallel branch model  RC transmission line model  RC series-parallel branch model

 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.

 This model simulates the ultracapacitor’s physical structure and electromechanical characteristics directly.

 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.

 diL/dt=(Vs-Vo)/L s=1(switch on)- (1)  diL/dt=(-Vo)/Ls=0(switch off)- (2)  From (1) and (2), diL/dt=(SVs-Vo)/Lo

 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

 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.