Dynamic model of direct matrix converter and its experimental validation

Abstract

Summary Power electronics is a major candidate in the ongoing research of electrical power grids because they can provide better control with more information (voltage ratio, efficiency, power flow direction, etc.) than the all‐passive solutions such as transformers and so forth. Power electronic transformer has the possibility to replace the conventional one by ac/ac matrix converter with high‐frequency compact electronic transformers. In this work, a dynamic model of matrix converter is studied and issues such as efficiency, voltage ratio limitation, and transient behavior are discussed and the equivalent numerical calculations are presented. Moreover, an experimental converter is built to validate the numerical results and also to describe the switching frequency impact on the operation. It is concluded that the control creates voltage ratio saturation and high‐switching frequency results in lower efficiency values. On the other hand, efficiency can be increased by using resonances of the circuit, which can also provide higher operating frequencies. Copyright © 2015 John Wiley & Sons, Ltd.

The Three-Phase Power Router and Its Operation with Matrix Converter toward Smart-Grid Applications

“…On the other hand, the main focus is on power line switching with the aid of power routers. The matrix converter has already been studied through both simulation and experiment from the authors [15]. This is called direct topology and its main difference from the indirect one is the lack of the DC link.…”

“…Previous studies have already experimented with a matrix converter [15] and AC conversion [16], and the combination of both in a single apparatus is a natural extension of this research.…”

“…The conventional way of transformer reaches the end of its era with the constant development of power electronics and the introduction of matrix converter and PET. Matrix converter has shown good efficiency results with the use of SiC devices in higher switching frequencies [15], fact that allows the replacement of the classic transformer by matrix converter topologies. Furthermore, a matrix converter with high frequency transformers has already shown its superiority versus the conventional ways as in [20,21].…”

Improvement of the input performance of a three‐phase‐single‐phase matrix converter based on space vector modulation

“…As it does not require a large‐capacity electrolytic capacitor in the direct current (DC) link, it also has high power density and high reliability. Due to above advantages, the matrix converter has gained considerable attention from researchers . At present, research on matrix converters mainly focuses on three‐phase‐three‐phase matrix converters (3‐3MCs), including new topologies, control strategies, overmodulation methods, common mode voltage suppression, and fault tolerance .…”

Stabilization of mode in imbalanced operation of matrix converter by time‐delayed feedback control

“…Algorithms such as predictive control and space vector modulation (SVM) control the modulation of the switches. 5 Recent matrix converters studies on dynamical models are reported in Kordonis and Hikihara 6 ; circuit topologies in Trentin et al, 7 Liu et al, 8 and Mizutani et al 9 Furthermore, Siami et al 10 At the boundary of straightforward research, unexpected behavior is disregarded without actually going into an in-depth analysis of the cause. 5 Nevertheless, characteristics of MCs such as a compact power circuit (no DC-link capacitor) and sinusoidal input and output currents make the MC an interesting research topic.…”