Assessment of Z-Source Based 7 level cascaded Multi Level Inverter for Induction Motor Control using Embedded Technique

Abstract

In recent decades, an Induction Motor (IM) becomes more superior in the industrial drives because of its ruggedness, relatively inexpensive and of its reliability. Hence to control the operation of IM, conventional Voltage Source Inverters (VSI) are implemented. However they results in poor voltage and current at its output.  Thus, an effective available alternate solution to control IM instead of traditional VSI is a Multilevel Inverter (MLI). The output voltage of the MLI is the summation of number of levels of DC voltage sources. Hence the output voltage of the inverter can be improved by increasing the levels of the DC source. It also has other advantages output voltage of the MLI includes low voltage stress, reduced harmonics distortion and lesser Electro Magnetic Interference (EMI) etc., However, the dependency of the output voltage on the input DC source is the major shortcomings of MLI. Hence to override this constraint, this work proposed a novel a Z-source based seven-level cascaded multilevel inverter for IM. In this work, a Z source network is introduced to step up /down the inverter voltage. Thus to examine the efficiency of the proposed system, simulation of proposed MLI is carried out in MATLAB. Simultaneously, experimental results of the proposed MLI were also provided to verify its efficiency practically.