A novel design of ST (Square type)-type module for asymmetric multilevel inverter (MLI) fed induction motor is approached in this research. The two back-to-back ST-type inverters and few different switching modules produce 17-level output by 12 switches with four unequal DC sources and filter. The advantages of this proposed technique are first, output voltage of the inverter can be is increased by cascading the inverter module. The main aspect of proposed inverter is natural conception of both +ve and −ve voltages without any auxiliary circuit. With the Nearest Level Control (NLC) switching strategy, good quality of output voltage with lower total harmonic contents can be accomplished. The response of the proposed module is analyzed by using MATLAB/SIMULINK. The simulation results are validated with prototype experimental results.