What are the advantages of interleaved PFC?

This leads to reduced volume of magnetics, reduced RMS current in the boost capacitor. The standout advantage of the interleaved PFC is the inductor ripple current cancellation. Since the branches are operating 180° out of phase, the input current is the sum of the inductor currents.

What is a boost inductor?

The boost inductor stores energy during turn-on period and delivers the load during turn-off period. Here a powdered core is selected for lower core losses, high saturation flux density and good temperature performance. The inductances of the IPFC is calculated as:

How do diodes affect the efficiency of a PFC converter?

The selection of diode in a PFC circuit has major impact on the efficiency of the converter. Conventionally fast recovery diodes are selected as a boost diode as their reverse recovery characteristics make them affect the converter ‘s overall performance. The reverse blocking voltage is usually selected based on maximum output voltage.

What is the output voltage of 3.6 kW interleaved boost PFC (IPFC)?

The output voltages of the power supply are 15 V (for Low side gate driver IC’s), 12 V (for Relay inrush current limit), and 3.3 V (for Digital signal control). Figure 2. Block diagram of 3.6 kW Interleaved Boost PFC (IPFC). Table 1: ROHM Components used in 3.6 kW Interleaved Boost PFC (IPFC).

Which diode should be used in a PFC converter?

Inductor specification. The selection of diode in a PFC circuit has major impact on the efficiency of the converter. Conventionally fast recovery diodes are selected as a boost diode as their reverse recovery characteristics make them affect the converter ‘s overall performance.

How does a PI controller correct a PFC error?

The reference signal from the voltage loop is compared with the input current sense (Iac_sense). The error signal is fed to a PI controller. This corrects the error by forcing the Input current to follow the reference current, which takes care of the essential operation of the PFC.