An Ameliorated Boost Packed E-Cell Nine-Level Single/Multiple Output Buck PFC Rectifier

Abstract

An improved boost-packed E-cell-based nine-level (9L) buck power factor correction (PFC) (BPFC) rectifier is proposed in this article. The multilevel operation of the proposed 9L-BPFC rectifier lessens harmonic content in the supply current and reduces voltage stress on the power devices. In addition, it can supply single/multiple dc loads at the same time. The series–parallel switching of the capacitors autobalances its voltages for possible load configurations. Hence, it reduces the need for complicated control to balance capacitor voltages and resolve the issue of rectifier instability during dynamic conditions. Moreover, it supports open-circuit fault tolerant operation for middle switches and maintains the same output power under fault conditions as in healthy mode. The operating principle, modulation strategy, device ratings, and capacitor sizing of the proposed rectifier are presented in this article. Finally, the performance of the proposed 9L buck PFC (9L-BPFC) rectifier is examined and verified using experimental results. The results revealed an optimal efficiency of 97.02%, a total harmonic distortion of 2.64%, and a power factor of 0.9978.