Published Paper Details:

The rectifier basically converts AC input to the DC output. In general, different types of rectifier topologies are available like diode bridge rectifier, thyristor-controlled rectifier, PWM based rectifier etc. This paper discusses front end PWM rectifier, its working principle and generation of gate pulses using two different modulation techniques namely sine pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM). This paper also features the description of 3-level front end PWM based rectifier and generation of 3-level space vector PWM. Simulation models of two level SPWM, two level SVPWM and three level SVPWM based front end rectifier are developed and simulated in MATLAB / SIMULINK platform and a comparative analysis is presented. sinusoidal Pulse width modulation (SPWM) technique and direct power control (DPC) Pulse width modulation technique for three-phase AC to DC converters using. MATLAB/SIMULINK software. Pulse width modulation (PWM) techniques are frequently used due to improved performance such as unity power factor operation with reduced total harmonic distortion (THD) at ac mains. In this paper simulation models for both PWM techniques are simulated with closed loop at rated load condition and then comparative analysis has been done in terms of input current THD and power factor. DPC is the efficient technique because of the better performance.