Active PFC design concept focuses on power loss and inrush current control

摘要

As the application of electronic power modules is constantly increasing, new problems are arising, beyond the actual discussion about the power factor (cos 0) in connection with the Power Factor Correction (PFC). Generally, mains AC voltage is transformed into DC voltage via Rectifier Bridge and capacitor. This configuration is used for most power electronics applications. In this configuration, the DC-link circuit will only be loaded, when the sinus maximum of the mains voltage (V_(IN)) is higher than the voltage at the De-link capacitor (V_(Cap)) circuit voltage. This leads to short and very high current pulses (I_(Cap)), which may interfere other users in the public power supply network.