Measured input voltage and current for PFC

Thread Starter


Joined Nov 23, 2021
Hello one and all!
I am currently in the process of implementing an active power factor correction algorithm. I am using an average current mode control to control the inductor current. At an input voltage of of 72.9V I get a waveform like this.
Input voltage w.r.t Input current.jpeg

Ive worked the power factor to be 0.9716. Using the FFT and the attached calculations.
Fundamental and 2nd harmonics.jpeg

3rd and 4th harmonics.jpeg
Firstly I would like to ask if this calculation is correct? And secondly I would like to ask why the input current waveform has so much distortion at the top? Furthermore if possible I would like to know whether it functions in CCM, CRcM and DCM.

Thank you