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Phase shift in in FFT Harmonics results

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Dom
Dom 2022-2-12
编辑： Dom 2022-2-12
Hi Guys,
I am using the fft_powerscope function to evalute a simulink output signal. My problem is, that the recreated signal does not ressemble the original signal. There seems to be a phase shift somewhere. Can you help me find the error? I shared all the data that I used.
order= z_46.fft_iabc.freq./z_46.fft_iabc.fundamental;
phase= z_46.fft_iabc.phase;
for y=1:length(phase)
phase2(y,1)=phase(y)-phase(2)*(y-1);
end
fs = 1000;
Ts = 1/fs;
duration = 10;
t = 0 : Ts : duration-Ts;
mag= z_46.fft_iabc.mag./ z_46.fft_iabc.magFundamental;
x=mag(1);
M=[order,mag,phase2];
phase=phase*pi/180;
for q=2:length(M)
x=x+mag(q)*sin(2*pi* (q-1)*t+phase(q));
end
Would gladly appreciate your help. The fft start time from the orginal signal is in the data set.

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