Bhangwar, Ghulam Mursleen 14MPE03 Supervisor - Prof. Dr. Aslam Pervez Memon creator Department Of Electrical Engineering text Nawabshah QUEST 2016 monographic 49P, : ABSTRACT Pulse Width Modulation variable speed drives are increasingly applied in many new Industrial applications that require superior performance. Recently, with developments in field of power electronic devices and microprocessors, various pulse width modulation (PWM) techniques are becoming popular in AC motor drive application. Now a day's number of Pulse width modulation (PWM) techniques are used to obtain variable voltage and frequency supply. The most widely used P WM techniques for three phase voltage source inverters are carrier-based sinusoidal P WM (SPWM), third harmonic injection PWM (THIPWM) and space vector PWNI (SVPWM). In this thesis first a models of sinusoidal PWM, third harmonic injection P WM and Space vector P WM is made and simulated using MATLAB/SIMULINK software. The waveform of various voltages, line to neutral and line to line voltages is generated and T HD of various voltages has been calculated using fast Fourier transform tool available in MATLAB .And on the basis of THV and dc bus utilization performance of Sinusoidal PWM, Third harmonic injection PWM and space vector PWM are compared. The simulation result shows that Space vector PWM utilizes dc bus voltage more effectively and generates less THV when compared with sinusoidal PWM and third harmonic injection PWM. Keywords: PWM Techniques SPWM, THIPWM, SVPWM, THD https://tinyurl.com/5epwp72t https://tinyurl.com/5epwp72t