Design of Digital Control Circuit for Power Factor Correction and Reduction of EMI in Power Converters

Abstract

The predominance of approved procedures to meet the limits of harmonic current has gained the momentum over the past years. Power electronic rectification devices are imposed along with their specific control methods to meet these requirements. Boost Power Factor Correction (BPFC) converter is a popular method to achieve low-harmonic input current. With the arrival of the digital control, the control techniques are powerful enough to reduce the harmonic current. In this work, simulation results from BPFC converter and the usefulness of the suggested method of detection over conventional zero current detection techniques are discussed. The proposed method allows for improved power quality using the advanced control techniques. The rapid development and large implementation of electrical gadgets have created a diverse issues like global warming, undesirable noise, Electromagnetic Interference (EMI) etc. EMI has a significant impact on the performance of other devices and the health of human beings. To mitigate issues related to EMI, we have outlined and built up a chaos control circuit using a delayed current feedback control algorithm. This study also discusses about a cascaded digital controller system for reduced effect of chaos and improved power factor of a 1-phase AC-DC converter system.