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Active Power Factor Correction: From a New Theoretical Concept to Commercialization Ilya Zeltser Shmuel Ben-Yaakov Green Power Technologies Ltd. Ben-Gurion University Abstract The need for Power Factor Correction (PFC) is driven by the worldwide concern for the quality of the power line supplies. Injection of high current harmonics into the power line and poor Power Factor (PF) in general, are known to cause many power distribution problems. In the light of the practical importance of PFC, many countries have adopted, or are in the process of adopting, voluntary and mandatory standards concerning current line harmonics injection Active Power Factor Correction (APFC) converters that are based on switch mode technology, are preferred today as a solution to PFC due to their small size and light weight – as compared to passive PFC network. . The prevailing control method of common APFC requires the sensing of the line voltage as a reference for the current control loop. This need for input voltage sensing has a negative impact on the system’s performance and power dissipation capability. The presented method, developed at BGU, eliminates the need of the line sensing increasing thereby the system’s robustness and flexibility. The theoretical foundation of the new APFC control method and the practical aspects of the approach will be described and discussed. 769844091