Abstract: Multilevel inverters have an attracted a great deal of attenuation in medium voltage and high power application. Due to their lower switching losses, EMI, high efficiency. Among the several multilevel inverters topology it is more attractive due to the simplicity of control. This paper proposes to CHMLI output voltage level is increase to reduced total harmonic Distortion. Hence the paper mainly focused on 14 level multilevel inverter using 12 switches (3H-bridge inverters). The result shows that the proposed method evaluate single and three phase cascaded multilevel inverter effectively minimizes a large number of specific harmonics and reduced switching loss , the output voltage in addition of very low total harmonic distortion. This paper proposed on HCMLI that uses only one power source for each phase. It can produce desired multilevel voltage wave from the multilevel inverter topology can overcome some of its limitations the conventional method. Echelon.