A New Double Boost Single DC Source Single-Phase Multilevel Inverter

An efficient double boost single phase switched-capacitor (SC) based single dc source multilevel inverter (MLI) is presented. Here, ‘n’ capacitors and (2n+4) switches are used to choose different current paths to generate (4n+1) voltage levels in the output. As a reference circuit, a seventeen level inverter (n = 4) is used. Here, conduction losses are reduced to improve the system efficiency by limiting the conduction through only three switches in any mode. Besides, comparatively lower blocking voltages are found in the power switches of the proposed design, and the switching losses are reduced further by supplying low frequency signals to the gates. Moreover, capacitance determination and switching loss calculation are also illustrated. A number of simulations are performed in MATLAB to validate these methods. A comparative study of the reported inverter with the recently published structures reveals that the number of control drivers and switches are promisingly lesser. Therefore, the presented double boost inverter topology can be commercially implemented in sustainable energy systems.