Z-Source Matrix Converter: An Overview

Abstract

Conventional matrix converters (MCs) have limited voltage gain that is less than 0.866, whether for direct MC (DMC) or indirect MC (IMC). The Z-source matrix converters (ZSMC) overcome the voltage gain limitation of the traditional MC and achieve buck andboost operation with reduced switches count, therefore achieving low cost, high efficiency, and reliability, compared to the back-to-back converter. Furthermore, it will leads to more MC industrial applications. This paper presents an up to date comprehensive overview of the different Z-source matrix converter topologies and their configurations, circuit analysis, modulation schemes, and applications. This study offers a comprehensive and systematic reference for the future development of the Z-source matrix converters.Keywords: Z-source converter, Quasi-Z-source converter, Z-source indirect matrix converter, Z-source direct matrix converter.I. 0885-8993 (c) topology of the MC, they are called Z-Source Indirect Matrix Converter (ZSIMC) and Z-Source Direct Matrix Converter (ZSDMC). Therefore, it is possible to overcome the low voltage gain challenge of the traditional MC; in addition, the ZS/QZS network allows the short circuit, which makes the ZSMC commutation easier. As a result, the ZSMC provides a low-cost, reliable, and highly efficient structure for buck and boost ac/ac conversion. Moreover, there are two different configurations of the ZSIMC topology depending on the location of the ZS/QZS network. The ZS/QZS network can be located between the rectifier and inverter of indirect matrix converter at the intermediate dclink, the voltage gain is extended, but it is not all-silicon-solution and will cause larger size and heavier weight (it requires large inductors and capacitors in the dc-link) than the conventional IMC. The other option, where the ZS/QZS network is inserted between the input ac source and rectifier of the indirect matrix converter to achieve all-silicon solution. This configuration can achieve high voltage gain with a small ZS/QZS network, but it requires a large number of switches, so it is at the result of higher cost. This paper will present an updated overview of the different Zsource matrix converter topologies including the ZSIMC with its all-silicon and not all-silicon configurations and also the ZSDMC.

A Novel Multiphase Pulse-Width-Amplitude Modulation for Quasi Z-source Three-to-Six- Phase Direct Matrix Converter

“…The ZS/QZS is connected to the AC input side and keeps compact structure. The experiment results are well verified the boost ability of ZS/QZS [2][3]. In [6], various Z-source converters in motor drive applications are introduced.…”

“…These drawbacks severely restricts its application in the related industrial field. As the three-phase quasi Z-source(QZS) networks [3] are proposed, it has already achieve a series of performances [4][5]. The QZS has advantages of buck-boost conversion, lower capacitor voltage stress, shoot-through allowing, needless dead zone, better robustness and high conversion efficiency [5].…”

Modeling and analysis of LC filter integrated quasi‐Z source indirect matrix converter

“…It is also a fact that both of them show a limited voltage gain, which is less than 0.866. Z/quasi‐Z source (ZS/QZS) DMC and IMC were proposed to achieve voltage gain larger than 0.866 …”

“…Z/quasi-Z source (ZS/QZS) DMC and IMC were proposed to achieve voltage gain larger than 0.866. [6][7][8] The ZS/QZS DMCs were firstly proposed in Ge et al 8 to extend voltage gain of traditional DMC, where ZS/QZS networks are inserted between AC source and DMC bridge. Voltage of DMC bridge is boosted to a high level by shooting through DMC bridge.…”

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

“…Due to above advantages, the matrix converter has gained considerable attention from researchers. 1,2 At present, research on matrix converters mainly focuses on three-phase-three-phase matrix converters , including new topologies, [3][4][5][6][7] control strategies, [8][9][10] overmodulation methods, 11,12 common mode voltage suppression, [13][14][15] and fault tolerance. [16][17][18] In recent years, the application of matrix converters has been studied from variable frequency speed regulation 19,20 to distributed power transmission, 21 wind power generation, 22 and other fields in academia and industry.…”