Analysis of PFC Improvement and THD Reduction Achieved by PFC-based Zeta Converter and PWM-Rectifier

Nowadays, to overcome power quality and power factor problems at AC input mains of power systems, various active (Power Factor Correction) PFC techniques are widely employed which utilize switch-mode converters and controller circuits to achieve the aims. Amongst them, in this paper, PFC-based zeta converter and single-phase PWM-rectifier are designated as efficient PFC circuitry to mitigate the Total Harmonic Distortion (THD) and also increase Power Factor (PF). This paper focuses on control and design, analysis, and performance evaluation of each PFC topology separately in the presence of brushless DC motor. The design complexity and number of element required in the PFC circuits are contributing factors to be regarded. Since, the larger these quantities are, the more destructive impact they have on the system reliability and expense. In this regard, this letter, compares the designed PFC-based zeta converter and single-phase PWM-rectifier in terms of their performance, application, design complexity and the number of required elements. The proposed PFC converter topologies are modeled and simulated in Matlab-Simulink environment and then are evaluated through some case studies.