frequency spectrum analysis of full-wave retified sine wave

[lhlblue]

for a sine wave of 50hz, if full-wave rectified, the wave can be 100hz. but at the transition point, that is, the connection point of adjacent two half sine wave, the frequency can be a little higher(2k~10khz maybe, because it is very sharp at this point), but i want to get the exact frequency of the transition point. i used fft, but didn't get any useful information.
thanks.

 

[nitishn5]

A simple Google search for Rectified sine wave Fourier series gives websites with the fourier series for the rectified sine wave.

https://www.rfcafe.com/references/electrical/periodic-series.htm

You seem to be asking for the frequency at a particular point in time which is not correct.

 

[crutschow]

The sharp edge of the rectified sinewave will have a fundamental frequency plus harmonics. A Fourier transform will give you that.