Code-Bin #593

untitled Matlab Code
Posted by: d | April 17, 2010 @ 3:07pm

Matlab Code

% Space Vector Modulation Scheme
% Daniel Amireh

clc
clear all

% Input Parameters
Vdc = 400;          % DC Voltage
Lf = 800e-6;        % Inductance 
Cf = 400e-6;        % Capacitance
Lload = 2e-3;       % Load Inductance
Rload = 5;          % Load Resistance
f = 50;             % Frequency
w = 2 * pi * 50;    % Angular Frequency
Tz = 100e-6;        % Sampling Time
Vref = (2/3)*Vdc;   % Reference Voltage

% Generation and plotting of PWM

for i=1:600
    if i>=300 && i<=600
        v0(i)=1
    else
        v0(i)=0
    end
    if i<=100 || i>=400
        v1(i)=1
    else
        v1(i)=0
    end
    if i<=200 || i>=500
        v2(i)=1
    else
        v2(i)=0
    end
    if i>=100 && i<=200 || i>=300 && i<=400 || i>=500 
        v3(i)=1
    else
        v3(i)=0
    end
    if i>=100 && i<=400 
        v4(i)=1
    else
        v4(i)=0
    end
    if i>=200 && i<=500
        v5(i)=1
    else
        v5(i)=0
    end
    if i<=100 || i>=200 && i<=300 || i>=400 && i<=500
        v6(i)=1
    else
        v6(i)=0
    end
    if i<=300
        v7(i)=1
    else
        v7(i)=0
    end
        
end

% plot results
i=1:600
figure
subplot(4,1,1)      % subplot used to plot more than one graph on the same graph
    title('PWM siganls using SVM tehnique') %set title
    ylabel('V0')    % set y-axis label
    grid on
    plot(i/600,v0) 
    ylim([0 2])

subplot(4,1,2)
    ylabel('V1')
    grid on
    ylim([0 2])
    plot(i/600,v1)

subplot(4,1,3)
    ylabel('V2')
    grid on
    ylim([0 2])
    plot(i/600,v2)

subplot(4,1,4)
    ylabel('V3')
    grid on
    figure
    ylim([0 2])
    plot(i/600,v3)

subplot(4,1,1)
    plot(i/600,v4)
    ylabel('V4')
    grid on
    title('PWM siganls using SVM tehnique')
    ylim([0 2])

subplot(4,1,2)
    plot(i/600,v5)
    ylabel('V5')
    grid on
    ylim([0 2])

subplot(4,1,3)
    plot(i/600,v6)
    ylabel('V6')
    grid on
    ylim([0 2])

subplot(4,1,4)
    plot(i/600,v7)
    ylabel('V7')
    grid on
    ylim([0 2])

% line to line voltage plots VLAB, VLBC and VLCA
figure
subplot(3,1,1)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t)
    plot(t,V)
    grid on 
    title('Line to line voltages')
    ylim([-400 400])
    ylabel('VLAB')

subplot(3,1,2)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t+120)
    plot(t,V)
    grid on 
    ylim([-400 400])
    ylabel('VLBC')

subplot(3,1,3)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t+240)
    plot(t,V)
    grid on 
    ylim([-400 400])
    ylabel('VLCA')

% Phase voltage plots VLAB, VLBC and VLCA
figure
subplot(3,1,1)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t)*2/3 % Phase voltage from line-to-line voltage
    plot(t,V)
    grid on 
    title('Phase voltages')
    ylim([-400 400])
    ylabel('VLAn')

subplot(3,1,2)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t+120)*2/3
    plot(t,V)
    grid on 
    ylim([-400 400])
    ylabel('VLBn')

subplot(3,1,3)
    t=.9:.001:1;
    f=400;
    V=300*sin(f*t+240)*2/3
    plot(t,V)
    grid on 
    ylim([-400 400])
    ylabel('VLCn')

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