A Comparison on Power Electronic Inverter Topologies

Abstract

This paper focuses on performances of different inverter topologies. Inverters are used in a large number of power applications. The function of an inverter is to convert DC power to AC; these are referred to as Voltage Source Inverters (VSI).  VSI are divided up into three categories: Pulse-width Modulated Inverters, and Square-wave Inverters. The PWM inverters are classified in to Single PWM inverter, Sinusoidal PWM inverters, Space Vector PWM inverters and Third Harmonic Injection Technique. Pulse-width modulation inverters take in a constant dc voltage. Diode-rectifiers are used to rectify the line voltage, and the inverter must control the magnitude and the frequency of the ac output voltages.  To do this the inverter uses pulse-width modulation using its switches. Square-wave inverters have their input connected to a controlled dc voltage in order to control the magnitude of the output ac voltage.  The inverter only controls the frequency of the output where the input voltage is controlled the magnitude. The output ac voltage has a waveform similar to a square wave which is where the inverter got its name.