An Improved Quadruple-Boost Switched-Capacitor-Based Nine-Level Inverter

This letter proposes an improved quadruple boosting nine-level (IQB9L) inverter with a reduced component count requiring ten switches, three diodes, and two capacitors for 9 L operation. The capacitors are self-voltage balanced using the series-parallel technique, ensuring sensorless operation. The devised structure exhibits the least conducting devices at each level resulting in reduced conduction losses. In addition, fewer devices transit at any level than similar state-of-the-art topologies, thus, reducing switching losses. A detailed comparison of the proposed IQB9L inverter demonstrates its improved performance. The experimental results are presented to validate the feasibility of the proposed inverter topology.

Automated summary

This letter proposes an improved quadruple boosting nine-level (IQB9L) inverter with reduced component count and improved performance. The proposed inverter requires ten switches, three diodes, and two capacitors for 9 L operation, and ensures self-voltage balanced capacitors using the series-parallel technique for sensorless operation. The experimental results validate the feasibility of the proposed inverter topology.