Multi-device L-impedance CLD Cell DC-DC Boost Converter

Abstract

This paper proposed a multi-device L-impedance network based DC-DC boost converter integrated with CLD cell. The proposed structure comprises of three units namely L-impedance, multi-device, and capacitor-inductor-diode (CLD) Cell. The key feature of the proposed structure is that it provides enhanced flexibility to select the voltage gain by selecting number of inductors, number of switches and duty ratio (D). By incorporating CLD cell in the proposed topology the voltage stress across the active switch is reduced. The Limpedance network is responsible for achieving the high voltage gain and the multi-device structure is adopted to reduce the rating of passive components. The derivation of the generalized structure for k-stage L-impedance with m-number of active switches (multi-device) is presented in the paper. Furthermore, the detail analysis for 2-stage L-impedance network with two active switches with its working modes and related equations are presented for 500W. Additionally, to shew the advantages of the proposed topology, it is compared with the existing topologies such as conventional boost converter(CBC), multidevice interleaved boost converter (MDIBC), multidevice switch inductor interleaved boost converter (MDISIBC), quadratic boost converter with CLD (Q-CLD), L-impedance boost converter with CLD (SIBC-CLD) and multi-device boost converter with CLD (MDBC-CLD).