Virtual Simulation and Comparison of Sine Pulse Width and Sine Duty-Cycle Modulation drivers for Single Phase Power Inverters

This paper presents a comparative study of SPWM (sine pulse width modulation) and SDCM (sine duty-cycle modulation) power inverters. A unified virtual workbench is built in Multisim framework, and used for fast simulation and rapid monitoring of results. From upstream to downstream, this workbench consists of: optional SDCM and SPWM divers; a single phase bridge power inverter, a 50 Hz filter and a load. The retained comparative criteria, rely on building hardware components, operating properties and the performance of the AC voltage delivered to the load in each case. As findings emerging from well tested prototyping systems, the SDCM-based inverter offers in most cases, smarter operating properties and better overall performance, compared to those provided by the  SPWM-based inverter. Hence, the extended versions of SDCM for three-phase inverters, might become an emerging research area of control systems in power electronics . Keywords- SDCM; SPWM; drivers, workbench; simulation;  inverters.