A novel single-phase 5-level asymmetric inverter

A novel asymmetric 5-level inverter is developed in which a half-bridge diode-clamp inverter and a conventional half-bridge inverter are connected to a common split-capacitor power supply. Analysis of a control technique for the inverter, which incorporates square-wave synthesis in conjunction with unipolar triangle carried-based PWM method, is included. Under the proposed control technique, the new configuration permits faster devices and high voltage devices operating in synergism. Comparison with three other single-phase 5-level inverters is presented in this paper. In order to verify the proposed approach, a single-phase 5-level asymmetric inverter was constructed and experimental results are provided.