A novel control method for dual mode time-sharing cascaded sinusoidal inverter

Dual mode time-sharing cascaded sinusoidal inverter often has higher efficiency than other type DC/AC inverter. However, for this type inverter adopts a small DC-link chemical capacitor instead of a conventional electrolytic one, the control is easy to be disturbed by the ripple of input DC voltage. This paper proposes a new ldquoreal-timerdquo feed-forward control for the dual mode time-sharing cascaded sinusoidal inverter topology with a small DC-link chemical capacitor. Modeling of the proposed dual mode time-sharing sinusoidal inverter is also carried out. And it can be seen that the proposed inverter is a special buck type converter in essence. All the details of this work, including circuits, PSIM simulation results, and experimental results, are presented.