Single Dc Source Cascaded H-bridge Multilevel Inverter Using Three Phase Transformers for Three Phase Applications

This paper proposes an H-Bridge Cascaded Three phase Multilevel Inverter. The proposed three phase Cascaded Multilevel Inverter makes use of single DC source. The proposed three phase Multilevel Inverter uses series connected three phase transformers so the number of single phase transformers used in traditional three phase Multilevel Inverter can be reduced. Hence the volume of the circuit is reduced, ease of control and flexibility of application. The switching losses and the harmonic components of the output voltage are reduced. The switching frequency of the proposed three phase Multilevel Inverter is equal to the fundamental frequency. Simulations are carried out to verify the performance of the proposed three phase Multilevel Inverter Keywords—H-Bridge Cascaded three phase multilevel inverter; single DC source; series connected three phase transformer and harmonics ______________________________________________________________________________________________________________