| Power supplies connected to AC mains introduce harmonic currents in the utility. It is very well known that these harmonic currents cause several problems such as voltage distortion, heating, noises, and reduce the capability of the line to provide energy. This fact and the presence of Standards or Recommendations have forced the industry to use power factor correction (PFC) in power supplies.; This dissertation aims to improve the performance of the single-stage power factor correction (S2 PFC) AC-DC converters with reduced cost. In the dissertation's first two chapters, an overview of current techniques for single-stage PFC AC-DC power systems is given. Further, issues and challenges of the existing systems are addressed in detail.; In the dissertation's third chapter, the existing S2 PFC AC-DC approaches are topologically generalized to pursue a methodology for potential topology variation, thereafter to overcome the issues that block the applications of single stage PFC AC-DC conversion approaches.; In the dissertation's following chapters, applications of the proposed translation rule are discussed, and the subject of design of high quality S2 PFC AC-DC power systems is investigated from the perspective of cost-effectivity, simplifying the conversion process while simultaneously keeping acceptable performance. The focus is put on alleviating voltage stress and current stresses, and better energy management in power conversion that features reduced complexity and higher efficiency. |
