Bipolar trapezoidal amalagated rectangular reference function for improved performance PWM multilevel inverter

In many research papers modulation techniques have been carried out with different techniques but this paper reveals a new idea to enhance the performance of MultiLevel Inverter (MLI). If trapezoidal as a reference in that case 3^rd harmonics produces significant spectrum harmonic energy, the impact of that the difficulty arises for filter design. An amalgamated rectangular references is developed to improve the performances of a five level Cascaded MultiLevel Inverter (CMLI). To validate the improvement a MATLAB-SIMULINK based simulation to bipolar amalgamated rectangular reference function is simulated for carrier disposition techniques Phase Shift techniques, Carrier Overlapping technique and Variable Frequency techniques are carried out. FFT analysis and performance of evaluation have been carried out. The simulation results validating the strategies presented. Among the all strategies developed carrier overlapping technique provides relatively higher DC bus utilization and PS provides the lowest distortion for moderate m_a.