Harmonics Control of Inverter to Drive Nine Phase Induction Motor by Using Unipolar and Bipolar Sinusoidal Pulse Width Modulation Technique

ABSTRACT Trendy and compact machineries is the demand of present industrial sectors. All over industries most of the load is driven by Motor Drives. Hence research on high torque density and heavy load becomes first choice of scientists.Multiphase motor drives streamline the challenges of three phase motor drives by introducing higher answers for excessive torque density and heavy loads. presented research focus on the design of Nine Phase Inverter to drive Nine Phase load. Almost all loads have nonlinear characteristics. Therefore, due to these nonlinear loads additional harmonics induced at the output of the Inverter Drive with fundamental frequency which affects the parameters like voltage and current. These additional parameters would not take any part in the output but increase the harmonics content and generates heat in the load called Total Harmonics Distortion(THD). Several methods are counseled to mitigate THD and to produce pure sinusoidal output signal. one in every of such schemes is using a Sinusoidal Pulse Width Modulation SPWM-based Voltage Source Inverter (VSI). In this work, the desired output voltage is carried out by means of evaluating the preferred sinusoidal waveform (Reference signal) with a high frequency triangular waveform (carrier signal). The harmonics and THD obtained using USPWM and BSPWM is compared using Matlab/Simulink. Keywords:BSPWM, Harmonics, Matlab/Simulink, Nine phase Inverter, Nine phase Induction Motor, THD, USPWM Technique.