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Implementation of Multilevel DC-Link Inverter for Standalone Application ABSTRACT: In this paper, the details of the implementation of a multilevel dc-link inverter (MLDCLI), suitable for standalone application is presented. The first stage of the MLDCLI is a multilevel dc-link to provide a stepped dc voltage waveform approximating the shape of a rectified sine wave. This rectified sine wave is then inverted after every alternate cycle by a conventional single phase full bridge inverter. MLDCLI requires lesser number of switches thus reducing the number of gate drive circuits and switching complexities as compared to the conventional multilevel inverters (MLI). Hence MLDCLI is chosen for this work. The simulation of nine level cascaded half bridge MLDCLI in closed loop is carried out and results are presented. The hardware implementation of the MLDCLI in square wave staircase operation mode and in-phase level shifted multicarrier sine triangular pulse width modulation mode (IPD-SPWM) is carried out and results are presented. DSP TMS320F28069 is used for the implementation of MLDCLI.
KEYWORDS: 1. MLI 2. MLDCLI 3. Cascaded half bridge MLDCLI 4. DSP 5. PI compensator
SOFTWARE: MATLAB/SIMULINK
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Gmail: asokatechnologies@gmail.com, Website: http://www.asokatechnologies.in
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