A novel control technique for Power Factor Correction in SEPIC converter utilizing input/output voltage waveforms sampling

In this study, a simple and novel control technique for Power Factor Correction (PFC) is introduced, which is a SEPIC-based (Single-ended Primary-inductor Converter based) rectifier with high input power factor. Operation of the proposed method is based on sampling of input and output voltages in SEPIC rectifier. Using samples of input and output voltage, this control system makes the input current to follow a sinusoidal path. As a result, the line current's Total Harmonic Distortion (THD) is reduced and the input power factor is improved. This paper also compares the new method with the conventional control method for the power factor correction. In order to examine the proposed control technique comprehensively, computer simulations and experimental implementations were utilized to verify the feasibility and effectiveness of this novel control technique.