Development of generalised relationship between active and rotating vectors in matrix converters

Abstract

In the past, rotating vectors were not commonly used in most modulation strategies for matrix converters (MCs) because their angular positions always change over time, making it difficult to create a repetitive switching pattern. To make them easier to use, the relationship between active vectors and rotating vectors was analysed regarding the output voltage and input current, which are the main objectives of the MC-modulation strategy. Based on a theoretical analysis, an active vector is equivalently replaced with a set of rotating vectors. The proposed idea to apply the rotating vectors was evaluated with the conventional space vector modulation method and showed good input/output waveforms and zero common-mode voltage.