How Do You Calculate AC Waveform Components and Errors?

[grinder76]

Sorted now thanks

 

[jaff90110]

I have these question as well and wanted to dig this thread up again.
As I need someone's help , Could some genius have a look at this for me please. I using the Excel spread sheet to generate this wave form graph. I'm wondering are these value looks alright?
I have using these expression for each:
for the fundamental = 141.4 Sin (240*Pi*t*)
3rd Harmonic = 28.3 Sin (720*Pi*t)
5th Harmonic = 14.1 Sin (1200*Pi*t - 1.2)

time(sec) Fundamental 3rd Harmonic 5th Harmonic
0 0 0 -13.17903268
0.001 96.79496078 21.80552477 7.65040339
0.002 141.1209794 -27.7987292 0.800419963
0.003 108.9505725 13.63362898 -8.945510095
0.004 17.72211923 10.41792484 13.67371942
0.005 -83.11283467 -26.91489941 -13.17903268
0.006 -138.8954173 23.89448029 7.65040339
0.007 -119.3879687 -3.54693051 0.800419963
0.008 -35.16475005 -19.3726831 -8.945510095
0.009 68.11996952 28.24415641 13.67371942
0.01 134.4793914 -16.63432264 -13.17903268

0.02 83.11283467 + 26.91489941 + (-13.17903268) = 96.85 V at 20 ms. ( for the question 5(iii) )

As the attach pdf. file for the graph, Are they look ok?
I have no idea how to merge them all in one graph.

 

[jaff90110]

Try just the first ms of the plot using time steps of 0.0001 second.

I think I got it to the shape as the post #9 as gneill suggested!
Thank you.

 

[grinder76]

I think I got it to the shape as the post #9 as gneill suggested!
Thank you.

For the 5th Harmonic don't forget to include the effect of the phase angle if you haven't done so already. i forgot!

 

[jaff90110]

For the 5th Harmonic don't forget to include the effect of the phase angle if you haven't done so already. i forgot!

Hi Grinder76
Thank you for let me know that,