Positive Controlled Matrix Converter as a Variable Multiphase Input-Output Converter

A matrix converter by design is a bidirectional switch based ac-ac converter featuring high efficiency, longer lifespan and high power density. This paper proposes a positive controlled matrix converter as a variable multiphase input-output converter. Based on the characteristic of Positive PWM control technique, the generalized matrix converter can be operated as a variable multiphase topology or as any of the four categorizes of power electronic converter. The switching sequence of Positive PWM control technique ensures that open circuit and short-circuit of current and voltage sources are eliminated hence continuous current flow is provided at the source and load of the matrix converter. Also, the generated output waveforms are balanced and high quality even if the input waveforms are hugely distorted and unbalanced. Theoretical analysis of the input-output phase variation of the proposed matrix converter is provided and PSCAD software based simulation of a single-phase to single-phase and a three-phase to two-phase positive controlled matrix converters are provided.