Current Sensorless Boost-Type Power Factor Correction by Integrating SC-PFM and Vienna Rectifier with Input Continuous Conduction

This paper introduces a novel implementation of the Vienna rectifier integrated with the switching cell with pulse frequency modulation (SC-PFM). The proposed converter offers soft switching, low current stress through the semiconductors, and the reverse voltage over the switches is half the output voltage. Notably, continuous input current, and resistive characteristics is achieved without the need for the conventional current control loop, further improving the converter reliability. Therefore, the study presents the topology, operating in a single-phase operation, and then expands the explanation for the three-phase, 4-wire, configuration. The article provides a detailed analysis of the operating principle and switching transitions behavior. To validate the proposed topology's capabilities, we conducted simulations with 127 V input voltage and a power output of 1 kW, achieving an output voltage of 800 V. Furthermore, experimental results obtained from a prototype, which closely emulated the simulated conditions, have reinforced the practical applicability of the design.