Serial to Parallel Conversion. Learn more about serial to parallel data conversion, urgent.

In this post, I am going to talk about modelling dc-dc power converters using MATLAB’s user defined function block. Doing so saves a lot of time and it’s much more easier as compared to the Buck converter model in which each dynamical equation is implemented using blocks.

Doing so is not only time consuming, but tracking back and finding out errors is hard especially when the system becomes larger. In this model, I have used as few blocks as possible.

The Boost converter circuit is shown in fig.1. I have accounted for the parasitic resistance in passive components as well as the ON resistance for active device. 1: Boost converter circuit Inputs the converter model are: • Input voltage • Voltage control (duty cycle) • Load current Converter outputs: • Capacitor voltage • Inductor current • Output voltage • Input current Step 1: • Start Simulink either using the MATLAB command window or by clicking the Simulink button on the toolbar • Create a new Simulink model file and save it as boost.mdl • From the Simulink place 3 instances of constant block located under “commonly used blocks”. Also place a subsystem block as well a scope block.

At this point your model file will look something like fig. Notice that I have renamed the blocks to identify their respective characteristic. 2: Initial set up for Boost converter model Step – 2: • Open the Boost converter subsystem block by double clicking on it. Notice the default connection between in1 and out1. Delete this connection. • Add 2 more instances of In1 and 3 more instance of Out1 found under commonly used block • Add an instance of subsystem, mux, and demux found under commonly used block • Navigate to user-defined functions and add a MATLAB Function block to your model file • Go to the continuous library and add 2 instances of integrator block to your model file.

Make the connections as shown in fig.3 and rename your blocks appropriately. Notice that by default mux block has 2 inputs and demux has 2 outputs. This can be changed by double clicking on the respective blocks and changing the number of inputs/outputs. 5: Setting parameters in repeating sequence block Step – 4: Going back to the user defined function, this is where we will enter the converter state equations. You can refer to the post to get an in-depth view of how these equations are derived. When the MOSFET is on, the behavior of the converter can be captured by the following equations, Similarly, when MOSFET switches off, the equations are Over one switching period, the equations can be combined and represented as follow: Inductor voltage, Capacitor current, Input current, Output voltage, Solving them, the equations simplify to, The above equations can be entered directly to our MATLAB function. The 5 inputs via mux are stored in an array format.

The code should look something as follow: function y = CCMBoost(u,L,C,RL,Ron,Resr)% Inputs:% u = [Vg D iout v_C i_L]%% Parameters:% L, RL, C, Resr, Ron%% Outputs:% y = [dv_C/C di_L/L Vo ig] Vg = u(1);% Input voltage D = u(2);% Switch control iout = u(3);% Load current vC = u(4);% Capacitor voltage iL = u(5);% Inductor current dbar = 1-D;% State equations Vo = vC + Resr*((iL*dbar) - iout);% Output voltage Ig = iL;% Input current iC = (iL*dbar) - iout;% Capacitor current vL = Vg - (Vo*dbar) - iL*((Ron*D) + RL);% Inductor voltage% Output y = [iC/C vL/L Vo Ig]; Save the MATLAB function. Now we want the parameters be set as variables so that the user can change them. In order to do so, select edit data/ports under tools as shown in fig. 13: Setting parameters I have set the parameters as follow: Input voltage: Required output voltage is.

Fsx crack torrent. Hence, Duty cycle, Load resistance, Load current, Switching frequency, Inductance Inductor series resistance Capacitance Capacitor series resistance Switch on resistance, PWM amplitude Initial inductor current This value for inductor current was obtained using the fact that the average inductor current in a boost converter is given by Initial capacitor voltage You can even leave the initial condition set to 0. Now that all the parameters are configured, its time to simulate and verify that our model produces the expected result. Save your design and go to configure parameters under simulation. I have set the stop time to and step size to. Go to the link and look at the slide #17 in order to get an overview of a closed loop system, in case you need some background.