ABSTRACT
Chapter 5 introduces yet another new variant of the SIMO inverter known as a SIMO DC-AC buck-boost inverter. It aims at providing a single-stage DC-AC power conversion from a DC power source into multiple independent AC output voltages whose RMS values can be greater than or less than the DC input voltage. A higher output power can be produced by operating this SIMO inverter in pseudo-continuous conduction mode (PCCM). This new inverter topology is formulated by integrating the functions of an inverting DC-DC buck-boost converter and an independent DC current source supplying a parallel network of LC resonant tanks acting as the DC-AC stage. The main inductor of the buck-boost inverter is ground-referenced. Hence, a simple and inexpensive low-side current-sensing circuitry can be used in the buck-boost inverter to sense the main inductor current. In this chapter, a complete mathematical proof of sinusoidal oscillation is also provided for this new type of SIMO inverter. Last but not least, the scalability of SITO to SIMO inverter is formally investigated. A mathematical model is created, which allows us to predict the maximum achievable number of AC outputs of the SIMO inverter operating in PCCM or boundary conduction mode.
