Abstract
The basic idea of a multi-level medium and high power inverter is to use a series of power switches with several low voltage dc sources to transform energy by synthesizing the stepped voltage waveform. Multilevel inverter is capable of increasing output voltage and efficiency with small switching losses and total harmonic distortion as the level improves the harmonic itself. This paper proposes a 1-phase 9-level T-style inverter with various SPWM strategies having less number of devices which posses high and low power region as compared to conventional inverter. Generally, it is used for low power appliances having maximum efficiency. A 1-phase 9-level T-style inverter was implemented and to generate 9-level voltage advanced multicarrier PWM control techniques are used. Finally, multi-level inverter topology simulation outcomes are performed using MATLAB/SIMULINK R2013a with different SPWM approaches such as PD, POD, APOD, HRPWM, VFISW, PS and SFO modulation techniques and its switching on/off pattern of IGBT’s.
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