![]() ![]() Thus the ripple in the inductor current is,ĭue to this ripple, the inductor current varies from a minimum to a maximum value Since corresponds to the time for which the MOSFET is ON, it can be replaced by. Let’s determine the ripple in the inductor current. Thus, the average inductor current will be, The implication of assuming steady state condition is that the inductor current will be periodic. Here the diode is forward biased, and thus the loop can sustain the inductor current flow while discharging it. The energy stored in the inductor is used to keep the voltage constant across the capacitor. We know that the inductor current cannot go to 0 instantaneously. Let’s assume that is ON for time and OFF for, where is the duty cycle. The inductor current starts building up and the energy is transfered to charge the capacitor to built an output voltage. The input voltage appears across the LC filter. MOSFET OFF, Diode forward biased (bottom) 2: Switch realization using MOSFET and Diode (top) In order to do so, select edit data/ports under tools as shown in fig. Now we want the parameters be set as variables so that the user can change them. VL = Vg - (Vo*dbar) - iL*((Ron*D) + RL) % Inductor voltage IC = (iL*dbar) - iout % Capacitor current ![]() Vo = vC + Resr*((iL*dbar) - iout) % Output voltage The code should look something as follow: The 5 inputs via mux are stored in an array format. The above equations can be entered directly to our MATLAB function. Over one switching period, the equations can be combined and represented as follow: Similarly, when MOSFET switches off, the equations are When the MOSFET is on, the behavior of the converter can be captured by the following equations, You can refer to the boost converter post to get an in-depth view of how these equations are derived. Going back to the user defined function, this is where we will enter the converter state equations. 5: Setting parameters in repeating sequence block In order to do so, select edit data/ports under tools as shown in fig.Fig. ![]()
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