Abstract: Today, the quality of the power supplied to sensitive electronic equipment is an important issue. Various non-linear loads can be found in Industrial, commercial and residential sectors. This study presents harmonic analysis of electric drives such as induction machine and switched reluctance machine and experimental results taken during the operation. The results show that the distortion in the voltage and current are more than the specified values of international standards. The key issue covered under this study is the purpose of suppressing the harmonics. Finally some of the important methodologies to reduce the harmonics are also discussed in this study which may utilize for specific problems.