Hybrid Control Strategy for a Novel Hybrid Multilevel Inverter

A new asymmetrical hybrid multilevel inverter topology is presented. The new topology improve the number of the output voltage level greatly through cascading two five-level H-bridge cells. A hybrid PWM strategy is proposed for the new topology that the switches of different cells works in different switching frequency to low switching losses. Lastly, an experimental 17-level asymmetrical inverter system is built to verify the topology and PWM method. It is demonstrated that the experimental results agree well with simulations, and the validity and practicability of the new topology and control method proposed is proved.