Analysis and Control of Simplified Dual-Output Single-Phase Split-Source Boost Inverters

Abstract

A simplified dual-output boosting inverter topology (DOBI) is proposed in this study. It can be used to supply two independent single-phase loads from a low voltage DC-power supply with fewer active and passive components. The output voltages can be at common frequency (CF) mode or different frequencies (DF) mode of operations. The DOBI topology uses a single inductor and capacitor to control boosting and inversion operations. Compared to the traditional dual output inverter, the proposed topology in this paper (DOBI) reduces the active switches by 25%, while compared to the basic Z-source-based dual output inverter, it reduces the passive elements by 50%. The main drawback of this topology is the high-frequency current commutation problem of the forward diodes. A novel carrier-based pulse width modulation scheme to obtain sinusoidal output voltage with low input current ripples of the proposed topology is presented in this paper. Moreover, the presented topology's operating principles and mathematical analysis are introduced. Finally, a simulation study is presented to confirm the theoretical study.