# Power Factor Correction Application Based on Independent Double-Boost Interleaved Converter (IDBIC)
## 4 Experimental Implementation  
The experimental implementation was based on the schematic represented in Figure 4. In this figure, both the control loop and the gate signal generator block structure was depicted. The resultant PWM gate signals are used to drive the four IDBIC power stage transistors (MOSFET IPW60R099 CPFKSA1, 600 [V], 31 [A]). This scheme is suitable for a symmetrical control of the two integrated boost converters in which a single reference voltage is used for both, so that each will work independently but identically. In view of this, the voltage on the output capacitors C\({}_{1}\) and C\({}_{2}\) will be regulated at the same value, and there is no need for a further balancing mechanism. For the considered power factor application, in which the total output voltage V\({}_{\text{out}}\) must be regulated, the symmetrical approach of the control loop is sufficient, which means that only a PI controller and a voltage reference V\({}_{\text{ref}}\) are required for the output voltage control loop.  
If a three-voltage-levels approach is desired at the output, the asymmetric control of the converter can be applied, in which two reference voltages must be entered and the two integrated boost converters will operate independently and potentially with different duty cycles.  
The laboratory test settings are shown in Figure 9. Based on an application with AC input voltages of 90 [V], 110 [V] and 130 [V] and a 350 [V] DC output voltage, the total harmonic distortion (THD) and power factor (PF), performed with the Tektronix PA3000 power analyzer, are illustrated in Figures 10 and 11. The main waveforms taken with the Tektronix MDO3024 oscilloscope are shown in Figure 12, while in Figure 13 one can notice the efficiency measurements.  
In Table 1, a comparison is made of the proposed solution with similar converter topologies. Limited three-level boost converter topologies are available for power factor correction applications; thus, the comparison is made also with similar topologies used in the DC-DC converter application.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Ref.**} & \multirow{2}{*}{**Converter Application**} & \multicolumn{2}{c}{**Voltage Stress On**} & \multirow{2}{*}{**Maximum Efficiency**} & \multirow{2}{*}{**Components S**\({}^{*}\)/D\({}^{*}\)/C\({}^{*}\)/C\({}^{*}\)/C\({}^{*}\)/T\({}^{*}\) \\ \cline{3-5}  & & **Switches V\({}_{\text{S}}\)/V\({}_{\text{O}}\)** & **Diodes V\({}_{\text{D}}\)/V\({}_{\text{O}}\)** & & \\ \hline
[27] & DC–DC & (M + 1)/2 M & (M + 1)/2 M & 91.7 & 2/2/2/4/2/- \\ \hline
[28] & DC–DC & 0.5 & 0.5 & 95.9 & 4/2/2/3/-/- \\ \hline
[29] & DC–DC & 0.5 & 0.5 & 95 & 2/3/2/3/-/- \\ \hline
[30] & DC–DC & (M + 1)/4 M & (M + 1)2 M & 95.85 & 3/4/2/3/-/- \\ \hline
[31] & DC–DC & (1 + 5 M)/6 M & (M + 1)/M & 95.9 & 6/9/6/1/-/- \\ \hline
[32] & DC–DC & 0.5 & - & 94.3 & 4/0/1/4/-/- \\ \hline
[33] & DC–DC & 0.33 & 0.33 & 93.9 & 1/5/1/5/0/- \\ \hline
[34] & DC–DC & (M + 1)/4 M & (M + 1)/2 M & 96 & 2/3/-/3/1/- \\ \hline
[35] & Boost PFC & 0.5 & 0.5 & 95.8 & 2/6/1/2/-/- \\ \hline
[36] & Boost PFC & 0.5 & 0.5 & 94.8 & 2/4/1/2/-/- \\ \hline
[37] & Boost PFC & V\({}_{\text{dc}}\)/2; V\({}_{\text{dc}}\)/V\({}_{\text{O}}\)/2 & - & 95.1 & 6/6/2/5/-/1 \\ \hline
[38] & Boost PFC & V\({}_{\text{dc}}\)/2; V\({}_{\text{O}}\)/2 & - & 94.2 & 6/8/2/6/-/1 \\ \hline Proposed & Boost PFC & 1/M + 0.5 & 0.5 & 95.8 & 4/6/2/2/-/- \\ \hline \hline \end{tabular}
\end{table}
Table 1: Comparison of the proposed topology with similar approaches.  
Figure 11: Laboratory practical power factor measurements.  
Figure 10: Laboratory practical total harmonic distortion measurements.  
Figure 9: Laboratory test setup.  
Figure 12: Practical measurements of the proposed converter at different input voltages and different output powers. V\({}_{\text{in}}\)—main input voltage; V\({}_{\text{out}}\)—DC output voltage and I\({}_{\text{in}}\) input current.  
Figure 13: Laboratory practical efficiency measurements.