In avionics applications the generators supply non-standard frequency in range 360 Hz to 800 Hz. Maximizing active power transferred from generators to the load is performed by power factor correction (PFC). Industrial PFC converters are optimized to work in the worldwide standard frequency range of 45 Hz to 65 Hz, but PFC designers face the challenge that the current loop has be fast enough to correctly shape the input current at zero crossing. In this presentation, we will describe how to properly design a standard critical conduction mode (CrM, but also CCM) controller and achieve stringent harmonic limits.
