• Dr. Manjesh
• Nilima S. Dabhade

Three phase motor drive limit the torque density hence Multiphase motor drives are better solutions for high torque density and heavy loads. In this work a Nine Phase Inverter is designed to drive Nine phase load. The output of the inverter consists of fundamental frequency of of rated voltage with additional harmonics. These harmonics are higher than fundamental frequencies that enhances the Total Harmonic Distortion (THD), results in increase of rms current and generates more heat in the load. Many techniques are used to suppress the harmonics to minimize the heat in the load. A common technique is employed in this work to minimize THD by constructing SPWM (Sinusoidal Pulse Width Modulation) technique to overcome the low performance of a conventional PWM (pulse width modulation) control. In this work, the desired output voltage is achieved by comparing the desired sinusoidal waveform (modulating signal) with a high-frequency triangular waveform (carrier signal). The PWM and SPWM results obtained are compared and presented in this paper using Matlab/Simulink.

Harmonics, Nine phase Inverter, SPWM Technique, Nine phase Induction Motor, Matlab/Simulink.

"Reduction of Total Harmonic Distortion in Nine Phase Induction Motor Drive with SPWM Technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.812-817, June 2019, Available :http://www.jetir.org/papers/JETIR1907S27.pdf

"Reduction of Total Harmonic Distortion in Nine Phase Induction Motor Drive with SPWM Technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp812-817, June 2019, Available at : http://www.jetir.org/papers/JETIR1907S27.pdf