Improved Cascaded H-Bridge Multilevel Inverters with Voltage-Boosting Capability

This paper proposes two improved cascaded H-bridge (ICHB) multilevel inverters that feature voltage-boosting capability. The conventional with a front-end dc–dc boost converter was restructured for single-stage operation. developed three-level topology not only saves one power switch but also exhibits lower voltage stress across its capacitor. Extension to five-level generation introduced by merely adding switches and final outperforms the classical (CHB) inverter significant reduction in count, 42% 50% both isolated dc source inductor counts. efficiency without compromising modularity of CHB inverter. operation theoretical analysis proposed topologies were validated via simulations experimental tests.