Simplified quasi‐Z source indirect matrix converter

Abstract

Summary Conventional matrix converters have a limited voltage gain less than 0.866 and also require many power switches and additional input filter that ensures a low input current harmonics to the grid. Quasi‐Z source (qZS) indirect matrix converter can provide high voltage gain and ensure a sinusoidal input current without additional input filter, which requires 12 power switches in rectifier stage. In this paper, a simplified qZS indirect matrix converter is proposed to overcome aforementioned limitations and achieve (1) higher voltage gain than 0.866, (2) less power switches, and (3) LC‐filter function integrated in qZS network to avoid additional filter. The new converter's operating principle and equivalent circuits are analyzed, and the modulation method is presented. The input current closed‐loop control is employed to implement sinusoidal input current waveform even though the proposed converter has less power switches and without extra input filter. A test bench is used to verify the simplified qZS indirect matrix converter and control methods. Simulation and experimental results identically validate the proposed converter system with wide voltage gain range and low input current harmonics. Copyright © 2014 John Wiley & Sons, Ltd.

Z-Source Matrix Converter: An Overview

“…The three ZS/QZSIMC topologies, shown in Fig. 3, were compared in detail in terms of voltage gain, current ripple, voltage ripple, inductor current and capacitor voltage stresses, ZS/QZS switch current and voltage stresses, filtering function, input current THD, output voltage THD, and also efficiency [12] . Table I summarizes the evaluation of three ZS/QZSMC topologies.…”

“…Different Z-source indirect matrix converter topologies: (a) ZSIMC with discontinuous current mode [11] ; (b) QZSIMC with discontinuous current mode [9] ; (c) QZSIMC with continuous current mode [8] ; (d) simplified QZSIMC [12] . The simplified QZSIMC which has been proposed in [12] , as shown in Fig. 3(d), by modifying the topology shown in Fig.…”

Modeling and simulation of quasi-Z-source indirect matrix converter for permanent magnet synchronous motor drive

“…In the inverter stage, the switching From the Figure 5, while commutation in the rectifier stage occurs, the inverter operates on zero vector, which denotes that the dc-link current is zero throughout commutation. Thus, zero current switching is ensured on the rectifier stage throughout commutation, which reduces switching loss in rectifier stage, and this simplifies the commutating problem, which it is very complex with DMC [26].…”

A novel modulation technique with interleaved‐and‐shifted shoot‐through state placement for quasi‐Z‐source inverters

“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The qZSI inherits all the advantages of the ZSI. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The qZSI inherits all the advantages of the ZSI.…”

“…Recently, the quasi-ZSI (qZSI) has been extensively researched as an up-to-date PCU configuration for applications in renewable and alternative energy sources. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The qZSI inherits all the advantages of the ZSI. In addition, the qZSI has the saliently attractive characteristics, such as lower component stresses and switching ripple to PV panel, a continuous current drawing from the PV source thus extra filtering capacitors can be saved, and a common dc rail between the source and inverter.…”