L-Impedance Multi-stage DC-DC Boost Converter with CLD cell for High Voltage Gain and Reduced Switch Voltage Stress

Abstract

Here in the research work, a multistage L- impedance network based DC-DC converter with capacitor- inductor-diode (CLD) cell integration has been projected. The stack of diodes and inductors in L-impedance network in addition with the active switch is termed as multistage switched inductor boost converter (M-SIBC). The beauty of this proposed L-impedance multistage switched inductor boost converter along with integrated CLD cell (M-SIBC-CLD) is to have high voltage output and reduced voltage stress across the active switch. The high output voltage is possible due to inductors present in the L-impedance network. The integrated capacitor-inductor-diode (CLD) cell has dual performing nature of reducing the voltage stress of the active switch as well helps to gain more voltage. As both the M-SIBC and CLD cell are responsible for enhancing the output voltage, the proposed L-impedance M-SIBC-CLD has high voltage gain. The proposed DC-DC converter topology is structured for 3-stage L-impedance M-SIBC-CLD. The 3-stage L-impedance M- SIBC-CLD converter topology is designed for 500 W. The operational frequency has been considered as 50 kHz to have reduced rating of inductors and capacitors and less rippled output waveforms. The detail analysis for continuous conduction mode, design methodology of the proposed L- impedance M-SIBC-CLD has been presented. On this a detail comparability is made with classical M-SIBC, Improved M- SIBC and switched inductor double switch DC-DC converter to show the superiority of the proposed L-impedance M-SIBC- CLD converter. The designed 500 W M-SIBC-CLD converter operation and performance has been validated using Matlab/Simulink as per theoretical analysis.