FPGA Implementation and Performance Investigations of Modified Reference and Modified Carrier Rpwm for Three Phase Inverter

Abstract

The circuit naturalness and rugged control schema of the Pulse Width Modulation (PWM) inverter has been the foremost preference in power electronics for a considerable length of time. The harmonic content of the output voltage will be the ruler of the inverter performance with any kind of switching techniques. The harmonic content of the three-phase inverter can be minimized by the way of implementing the pulse width modulation. The carrier and reference modifications lead a role to improve the fundamentals and decrease the Total Harmonic Distortion (THD) for any pulse width modulation based inverters. The Random PWM (RPWM) techniques have been found to alleviate undesirable acoustic, vibration, and electromagnetic interference effects in pulse width modulation inverters fed ac drives. The shape of the carrier waveform is also a significant factor, which influences the variation of the bandwidth of the pulses. Inverted Sine Carrier-Based Pulse Width Modulation (ISCPWM) has been acknowledged as a noticeable method for fundamental fortification for Direct Current (DC) to Alternating Current (AC) conversion. Bipolar pulse width modulation is the one, in which the boundary of the carrier from -1 to +1 and a single reference has been used. Unipolar PWM carrier boundary from 0 to 1 and two references (positive and negative references) have been used. While comparing these two, it can be observed that the bipolar pulse width modulation gives better harmonic reduction than the unipolar pulse width modulation. But unipolar pulse width modulation gives a better modulation control index resulting in higher fundamental amplitude, especially for the lower range of modulation index pulls in drive applications where the low-speed operation is essential. newlineThis research investigates three different PWM techniques which are compared along with conventional PWM techniques like Sinusoidal PWM (SPWM) and RPWM. newlineThe first research study manages with the performance examination of pulse width modulation scheme for 3and#934; Voltage Source I