## 5 Experimental Verification  
The printed circuits board (PCB) for the 2 kW PFC converters is designed using OrCAD capture and PCB design software 17.4 (Cadence, CA, USA) using the components given in Table 3. The control circuit for the conventional PFC circuit is implemented using the UCC28180 CCM PFC controller and the control circuit for the interleaved PFC circuit is implemented using the UCC28070 interleaved CCM PFC controller from Texas instruments. With using the design calculation tools of both IC controllers, the cross over frequency for the voltage and current control loops are adjusted with the same values given in design Section 3. Figure 23 shows the experimental setup used for testing the experimental performance for the designed PFC converters. The Kikusi DC electronic load with a power rating of about 3 kW is used for loading the converters from 25% to 100% of the full load condition. At the rated input of (220 Vrms, 60 Hz), different loading conditions (25%, 50%, 75%, and 100%) of the full load condition are loaded to the designed converter. Figures 24 and 25 and show the input, output voltages, input current waveforms, and the power factor measurement for the conventional and the interleaved PFC converters, respectively. \begin{table}
\begin{tabular}{c c c} \hline \hline  & **Conventional CCM PFC** & **Interleaved CCM PFC** \\ \hline Bridge & GSIB2580 & GBJ3508 \\ Boost Inductor & 470 uH & 2\(\times\) 300 uH \\ MOSFET & IPZ60R040C7 & 2\(\times\) IPV600B9976 \\ Boost Diode & IDHIG665C5 & 2\(\times\) IDH1665C5 \\ Bulk capacitor & 1120 uF & 1120 uF \\ \multirow{2}{*}{PFC Control IC} & (2\(\times\) EKMR421 VSN561 MR50S) & (2\(\times\) ALA7 DA561 DE450) \\  & UCC 28180 & UCC 28070 \\ Gate driver & 1 ED160N12 AF & UCC27324D \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Selection elements of the different topologies. Figure 23: Experimental setup for testing of the designed PFC converters. It is observed that the designed voltage control loops in the conventional and interleaved PFC converters ables to adjust the output voltage at a constant value of 400 V with very small ripple contents at different loading conditions. Additionally, the current control loops offer input current with a high power factor and small THD. Figure 24a shows that the conventional PFC converter offers an input power factor of about 98.8% at a lower loading condition of 25%, which is higher than an interleaved PFC converter of 97.50% with the same loading condition as shown in Figure 25a. With the increasing of the loading condition in the conventional PFC converter, the input current distortion factor is increased due to the high voltage and current stresses in the PFC converter switch and increasing of the thermal heating of the PFC inductor which reduced the input power factor at higher loading condition. On the other hand, the channeling of the current through two channels in the interleaved PFC converter reduced the components' current and voltage stresses and also improve the thermal performance of the PFC inductors, makes the converter power factor stable at higher values at the higher loading condition. Figure 24: Input and output voltages, input current, and power factor of the designed conventional PFC converter with different loading condition. (**a**) 25%; (b) 50%; (c) 75%; (d) 100%. Figure 25: Input and output voltages, input current, and power factor of the designed interleaved PFC converter with different loading condition. (**a**) 25%; (b) 50%; (c) 75%; (d) 100%. loading condition. At full loading condition of 2 kW, Figures 24d and 25d show that the conventional PFC converter offers an experimentely power factor value about 99% and the interleaved PFC converter offers a power factor value of about 99.85%. With different loading conditions, as depicted in Figure 26, the designed PFC converters performances are tested through measurements of the THD, power factor and conversion efficiency by using the simulation and experimental tests.