A comparison of PWM control and digital control strategy for asymmetric DC-AC cascaded H-bridge multilevel inverter with R and motor load

This paper proposes a comparison between the PWM control and Digital control strategy between cascaded multilevel inverter where the conventional method produces 2n+1 output level for n independent DC sources and the digital control strategy produces 2ⁿ⁺¹−1 output level for the same n independent DC sources also with the same number switches. This paper also brings out the advantage of using Digital control over the conventional PWM control by producing a low total harmonic distortion level (THD) level for R-load. Also the paper compares the performance of both the method in a Real time load. This simulation is done with the help of MATLAB/SIMULINK