hi everyone,
I need the matlab code or simulink for a 3-phase PWM inverter i found exactly what I need here
(www2.ece.ohio-state.edu/ems/PowerConverter/Sine_PWM_Inverter.pdf ) but it doesnt work correctly i get some error in the code and the simulink is also not working correct ( or at least i dont know how it works). It would be very nice if someone could help me with it.
thank you very much!
Regards

 

how about some details? for example what error? where?

 

Well if i implement the code i get the error that (Vi ) is undifiend
Have u tried the code? Is it working with u?
Sorry for bothering you
Thanks again

 

This is the code : if its working with u guys tell me plz :)

% Input data
Vdc= 400; % DC-link voltage
Lf= 800e-6;% Inductance for output filter
Cf= 400e-6; % Capacitance for output filter
Lload = 2e-3; %Load inductance
Rload= 5; % Load resistance
f= 60; % Fundamental frequency
fz = 3e3; % Switching frequency
m= 0.8; % Modulation index
% Coefficients for State-Space Model
A=[zeros(3,3) eye(3)/(3*Cf) -eye(3)/(3*Cf)
-eye(3)/Lf zeros(3,3) zeros(3,3)
eye(3,3)/Lload zeros(3,3) -eye(3)*Rload/Lload]; % system matrix
B=[zeros(3,3)
eye(3)/Lf
zeros(3,3)]; % coefficient for the control variable u
C=[eye(9)]; % coefficient for the output y
D=[zeros(9,3)]; % coefficient for the output y
Ks = 1/3*[-1 0 1; 1 -1 0; 0 1 -1]; % Conversion matrix to transform [iiAB iiBC iiCA] to [iiA iiB
iiC]​
A.2 Matlab Code for Plotting the Simulation Results​
% Written by Jin Woo Jung
% Date: 02/20/05
% ECE743, Simulation Project #1 (Sine-PWM)
% Matlab program for plotting Simulation Results
% using Simulink
ViAB = Vi(:,1);
ViBC = Vi(:,2);
ViCA = Vi(:,3);
VLAB= VL(:,1);
VLBC= VL(:,2);
VLCA= VL(:,3);
iiA= IiABC(:,1);
iiB= IiABC(:,2);
iiC= IiABC(:,3);
iLA= ILABC(:,1);
iLB= ILABC(:,2);
iLC= ILABC(:,3);
figure(1)
subplot(3,1,1)
plot(t,ViAB)
axis([0.9 1 -500 500])
ylabel('V_i_A_B [V]')
title('Inverter output line to line voltages (V_i_A_B, V_i_B_C, V_i_C_A)')
 
grid
subplot(3,1,2)
plot(t,ViBC)
axis([0.9 1 -500 500])
ylabel('V_i_B_C [V]')
grid
subplot(3,1,3)
plot(t,ViCA)
axis([0.9 1 -500 500])
ylabel('V_i_C_A [V]')
xlabel('Time [Sec]')
grid
figure(2)
subplot(3,1,1)
plot(t,iiA)
axis([0.9 1 -100 100])
ylabel('i_i_A [A]')
title('Inverter output currents (i_i_A, i_i_B, i_i_C)')
grid
subplot(3,1,2)
plot(t,iiB)
axis([0.9 1 -100 100])
ylabel('i_i_B [A]')
grid
subplot(3,1,3)
 
plot(t,iiC)
axis([0.9 1 -100 100])
ylabel('i_i_C [A]')
xlabel('Time [Sec]')
grid
figure(3)
subplot(3,1,1)
plot(t,VLAB)
axis([0.9 1 -400 400])
ylabel('V_L_A_B [V]')
title('Load line to line voltages (V_L_A_B, V_L_B_C, V_L_C_A)')
grid
subplot(3,1,2)
plot(t,VLBC)
axis([0.9 1 -400 400])
ylabel('V_L_B_C [V]')
grid
subplot(3,1,3)
plot(t,VLCA)
axis([0.9 1 -400 400])
ylabel('V_L_C_A [V]')
xlabel('Time [Sec]')
grid
figure(4)
subplot(3,1,1)
plot(t,iLA)
axis([0.9 1 -50 50])
 
ylabel('i_L_A [A]')
title('Load phase currents (i_L_A, i_L_B, i_L_C)')
grid
subplot(3,1,2)
plot(t,iLB)
axis([0.9 1 -50 50])
ylabel('i_L_B [A]')
grid
subplot(3,1,3)
plot(t,iLC)
axis([0.9 1 -50 50])
ylabel('i_L_C [A]')
xlabel('Time [Sec]')
grid
figure(5)
subplot(4,1,1)
plot(t,ViAB)
axis([0.9 1 -500 500])
ylabel('V_i_A_B [V]')
grid
subplot(4,1,2)
plot(t,iiA,'-', t,iiB,'-.',t,iiC,':')
axis([0.9 1 -100 100])
ylabel('i_i_A, i_i_B, i_i_C [A]')
legend('i_i_A', 'i_i_B', 'i_i_C')
grid
 
subplot(4,1,3)
plot(t,VLAB,'-', t,VLBC,'-.',t,VLCA,':')
axis([0.9 1 -400 400])
ylabel('V_L_A_B, V_L_B_C, V_L_C_A [V]')
legend('V_L_A_B', 'V_L_B_C', 'V_L_C_A')
grid
subplot(4,1,4)
plot(t,iLA,'-', t,iLB,'-.',t,iLC,':')
axis([0.9 1 -50 50])
ylabel('i_L_A, i_L_B, i_L_C [A]')
legend('i_L_A', 'i_L_B', 'i_L_C')
xlabel('Time [Sec]')
grid
%For only Sine PWM
figure(6)
subplot(4,1,1)
plot(t,Vtri,'-', t,Vsin,'-.')
axis([0.9 0.917 -1.5 1.5])
ylabel('V_t_r_i, V_s_i_n [V]')
legend('V_t_r_i', 'V_s_i_n')
title('V_t_r_i and V_s_i_n')
grid
subplot(4,1,2)
plot(t,ViAn)
axis([0.9 0.917 -500 500])
ylabel('V_i_A_n [V]')
grid
 
subplot(4,1,3)
plot(t,Vtri,'-', t,Vsin,'-.')
axis([0.9 0.909 -1.5 1.5])
ylabel('V_t_r_i, V_s_i_n [V]')
legend('V_t_r_i', 'V_s_i_n')
grid
subplot(4,1,4)
plot(t,ViAn)
axis([0.9 0.909 -500 500])
ylabel('V_i_A_n [V]')
xlabel('Time [Sec]')​
grid

 

This site may give you some help.
http://www.mathworks.com/discovery/pulse-width-modulation.html