hello
im using multisim to do fourier analysis I have this circuit and results
I put this into excel
I got a square wave from adding the odd harmonics and the fundamental
I have to find the thd
I used the square root of added harmonics (which are squared) over total voltage.
the problem,
I have a 10v square wave and im getting 6.36 for the fundamental. I don't know why, is this because the rest of the odd magnitudes add up. because when I did that I got more than 10 volts.
I got an answer of 54.45%
I used the values 2.12255, 1.27404, 0.910576 and 0.708795 all individually squared. under a square root which is over total voltage. which is the harmonic values added.
is this correct because the thd shown in excel and multisim is 42% though I thought this would be because of the even harmonics as well.
I also have this question,
any help would be great
thanks
simon
im using multisim to do fourier analysis I have this circuit and results
I put this into excel
I got a square wave from adding the odd harmonics and the fundamental
I have to find the thd
I used the square root of added harmonics (which are squared) over total voltage.
the problem,
I have a 10v square wave and im getting 6.36 for the fundamental. I don't know why, is this because the rest of the odd magnitudes add up. because when I did that I got more than 10 volts.
I got an answer of 54.45%
I used the values 2.12255, 1.27404, 0.910576 and 0.708795 all individually squared. under a square root which is over total voltage. which is the harmonic values added.
is this correct because the thd shown in excel and multisim is 42% though I thought this would be because of the even harmonics as well.
I also have this question,
- Research and determine the Fourier series formula used to construct a square wave
any help would be great
thanks
simon
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