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Plotting the waveforms of the harmonic components
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[QUOTE="jambaugh, post: 6007448, member: 76054"] Your fundamental has an angular frequency of [tex]\omega_f = 240\pi [/tex] divided by whatever is your time unit. You are rescaling to degree angle measure. The relation, in radians is: [tex] \theta = \omega_f \cdot t[/tex] but you are then converting to degrees. Note that [itex]1^\circ = \frac{2\pi}{180}[/itex] which means you can treat the degree symbol itself as this number. So your A2 through A26 entries are values of: [tex]\theta^\circ = \frac{2\pi \omega_f}{180}\cdot t[/tex] You are then converting these back into radians within your trigonometric function: SIN(A2*PI()/180)*141.44 = [itex]141.44 \sin(\omega_f t)[/itex] You want to then change the frequency (and amplitude) for your harmonics and so you want to first divide out the old frequency and then multiply by the new one: [tex]\sin(\omega_n t) = \sin(\frac{\omega_n}{\omega_f}\cdot \omega_f t)[/tex] which means you need to add a factor of the ration of the angular frequencies to your trig function: Note that [itex]\omega_3 = 720\pi[/itex] and so [itex]\omega_3/\omega_f = 720/240 = 3[/itex]. That's why it's the 3rd harmonic. So add a factor of 3 in your trig function: SIN(3*A2*PI()/180)*28.29 would be the entry for angle in A2. I am sorry to take the long way around to this simple answer but the steps are those you should, yourself, take when translating your problem to the excel spread sheet. Doing so should make the answer to your question relatively clear to you from the start. [/QUOTE]
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Plotting the waveforms of the harmonic components
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