Interleaved PFC Using Digital Control Lowers Cost and Boosts Efficiency

摘要

A C-rectified power sources with capacitive filtering draw high-amplitude discontinuous currents, resulting in poor power factor and a power line rich in harmonics and high circulating currents. Poor power factor and high line-current harmonics can cause overheating of transformers and inductive equipment, degradation of system voltages, and increased stress on components due to higher peak currents. In addition, stringent limits imposed on harmonic currents by international standards and regulatory bodies make the need to improve power quality even more important. Power-factor correction (PFC) is the solution to this problem.