Suitable Single-Phase to Three-Phase AC–DC–AC Power Conversion System

This paper presents a single-phase to three-phase power conversion system with parallel rectifier and series inverter to cope with single-phase to three-phase asymmetry. Such converter guarantees both reduction in the input current processed by rectifier circuit and reduction of the output voltage processed by the inverter circuit. It is worth mentioning that, in spite of proposing a topology with features not yet observed on the technical literature, this paper presents a comprehensive model of the proposed converter, modulation strategy, and a general comparison with the conventional configuration. Simulated and experimental results are also presented.

I. Introduction

In the past, single-phase to three-phase conversion systems were made possible by the connection of passive elements (capacitors and reactors) with autotransformer converters [1]–[3]. Such kind of system presents well-known disadvantages and limitations [3]. In those days, power electronics with silicon power diodes and thyristors was just emerging. As described in [4], the so-called power electronics, with gas tube and glass-bulb electronics, was known as industrial electronics, and the power electronics with silicon-controlled rectifiers began emerging in the market from the early 1960s.