Abstract
This paper proposes a three phase nine level inverter with various three phase star (Y) connected loads of R (Resistive) load, RL (Resistive Inductive) load and IM (Induction Motor) load. The various PWM (Pulse Width Modulation) control techniques were proposed. Motor load provides rated speed N (rpm) and its corresponding electromagnetic torque T (N-m). Pulse Disposition (PD) technique provides better Total Harmonic Distortion (THD) and rated speed for this proposed topology. Performance factors are like VRMS, VPEAK, IRMS, IPEAK (fundamental), THD were obtained and its FFT plots are analyzed and presented. Simulations were performed using MATLAB – SIMULINK. Simulation results such as output voltage, output current and speed torque characteristics are shown. Carrier Overlapping (CO) PWM is found to execute relatively higher fundamental RMS component.
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