ScholarWorks@성균관대학교

초록

This paper proposes a robust feedforward control strategy with enhanced noise immunity to mitigate controller instability and current distortion caused by highfrequency switching noise in power factor correction (PFC) converters. The proposed strategy replaces conventional feedforward components, which are susceptible to noise, with noise-immune components derived from internal controller computations performed during the pre-charging stage. As a result, this proposed strategy ensures stable control performance and maintains a current total harmonic distortion (THD) below 5%, even under high-frequency switching and low inductance conditions. The effectiveness of the proposed strategy is validated through simulations and experiments conducted on an 11-kW interleaved totem-pole PFC hardware prototype.

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