Added an initial version of a SIMSCAPE based model.

This is a very basic model containing all the details necessary to run a simulation with a twist board.

config_script.m

+% script to launch before everything! 
+clear all;
+%% add the path of this file to the matlabpath.
+[dirName, fileName, ext] = fileparts(mfilename('fullpath'));
+addpath(dirName);
+
+%% Initializes the simulation
+
+sim_time = 0.05;  %overall simulation time
+
+%% Initialize the source parameters
+
+source_R = 0.1; %source internal resistance [Ohm]
+source_V = 40;  %source voltage [V]
+
+
+%% Initialize the load parameters
+
+load_Vout = 24; %load voltage [V]
+load_freq = 1;  %load frequency [Hz] - near DC
+load_Power = 200; %load power [W]
+
+load_pulse1_on_time = sim_time*0.2; %disturbance starts at 20% of simulation
+load_pulse1_off_time = sim_time*0.4; %disturbance ends at 40% of simulation
+
+load_C = 240e-6;  %load capacitance [F]
+load_C_init_V = load_Vout ; %load capacitor initial voltage [V]
+load_Rline1 = 1;  %load line 1 resistance [Ohm]
+load_Rline2 = 1;  %load line 2 resistance [Ohm]
+
+
+%% Initilalizes twist parameters
+
+isInterleaved = 1; %defines if the legs are interleaved
+
+twist_low_side_L = 33e-6;
+twist_low_side_rL = 20e-3;
+twist_low_side_C = 47e-6 + 0*3*4.7e-6;
+twist_low_side_rC = 0.4;
+
+twist_high_side_rC = 0.1;
+twist_high_side_C = 120e-6;
+twist_high_side_C_init_V = source_V;
+
+
+twist_FET_Ron = 0.02;
+twist_FET_Rd = 0.01;
+twist_FET_Vf = 1.5;
+twist_FET_Rs = 1e5;
+twist_FET_Cs = inf;
+
+
+
+twist_freq_switching = 200e3;
+twist_period_switching = 1/twist_freq_switching;
+twist_freq_control=1000;  %control frequency
+
+twist_freq_sampling=10000; %sampling frequency
+twist_period_sampling = 1/twist_freq_sampling;
+
+twist_duty_cycle_max = 0.9; %Maximum duty cycle
+twist_duty_cycle_min = 0.1; %Minimum duty cycle
+
+twist_pwm_resolution = 100e-9; %resolution of the PWM generator
+
+twist_meas_delay = 200e-9; %delay of the measurement chain
+twist_data_sampling_period = 1/twist_freq_sampling;
+
+twist_phase_shift_leg_1_deg = 180;
+twist_phase_shift_leg_1_sec = (twist_phase_shift_leg_1_deg/360)*(twist_period_switching);
+
+
+
+
+%% Initialize control parameteres
+
+control_v_low_ref = 24;  %voltage reference for the ++/-- control
+control_d_step = 0.01; %step for the ++/-- control
+control_droop_R = 1;     %resistance of the droop control
\ No newline at end of file