An Improved Power Factor Correction with

The increasing prevalence of electronic equipment necessitates stringent evaluation of the harmonic content in the line current of devices connected to AC supplies. This paper aims to address this challenge by proposing an improved power factor correction (PFC) circuit that utilizes the leakage inductance of an isolation transformer, thereby enhancing power supply performance. The methodology involves the design of an isolated power factor corrected power supply that ensures the input current is sinusoidal and in phase with the input voltage. Specifically, the system integrates a bulk capacitor located within the isolated section of the power supply which facilitates controlled startup operations without additional surge-limiting components. Furthermore, a control technique is developed predicated on switch timing and input/output voltage measurements, designed to simultaneously achieve voltage regulation and maintain power factor control. The results validate the efficacy of the proposed PFC circuit, demonstrating a significant improvement in the power quality of electronic devices, thus ensuring compliance with established standards. This research contributes to the advancement of power supply technology, particularly for applications requiring high-efficiency AC-DC conversions.