Matrix-reactance frequency converters using an low frequency transfer matrix modulation method

Fedyczak, Z.; Szcześniak, Paweł

doi:10.1016/j.epsr.2011.09.017

Cited by 28 publications

(14 citation statements)

References 12 publications

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“…The results obtained from models based on circuit averaging technique (32)-(34) and models based on statespace averaging technique (35) are the same, and are shown in Figure 11 and Figure 12, [12], [14], [15]. Those figures shown steady state characteristics of the voltage gain ( Figure 11) and input power factor ( Figure 12) as functions of load voltage setting frequency and sequence pulse duty factor D S .…”

Section: Validation Of Average Modelsmentioning

confidence: 62%

“…The average state space equations for a MRFC can be represented by the following equation [15], [18]:…”

Section: A Comparison Between Two Average Modelling Techniques Of Ac-mentioning

confidence: 99%

“…The general form of the average state space equations is described by following set of equations [12], [15], [16], [18]:…”

Section: State-space Averaging Techniquementioning

confidence: 99%

“…The mathematical model, of the analysed MRFC (Figure 1), described by the matrix differential equation (31) for Venturini control strategy (4)- (7) is defined as (32) [15]. The model defined by equation (32) is time-varying model in state-space form, because the pulse duty factors d k for MRFCs is a time variable [12].…”

Section: A Comparison Between Two Average Modelling Techniques Of Ac-mentioning

confidence: 99%

“…The state-space averaging method is based on analytical manipulations using the different converter state representations [12], [15], [17]. The average state space method applied to the matrix-reactance frequency converter in Fig.…”

Section: State-space Averaging Techniquementioning

confidence: 99%

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A Comparison Between Two Average Modelling Techniques of AC-AC Power Converters

Szcześniak¹

2015

IJPEDS

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In this paper, a comparative evaluation of two modelling tools for switching AC-AC power converters is presented. Both of them are based on average modelling techniques. The first approach is based on the circuit averaging technique and consists in the topological manipulations, applied to a converter states. The second approach makes use of a state-space averaged model of the converter and is based on analytical manipulations using the different state representations of a converter. The two modelling techniques are applied to a same AC-AC called matrix-reactance frequency converter based on buck-boost topology. These techniques are compared on the basis of their rapidity, quantity of calculations and transformations and its limitations. Keyword:Averaged model Buck-boost topology Matrix converter Modelling Power converters Copyright © 2015 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Paweł Szcześniak, Institute of Electrical Engineering, University of Zielona Gora, 65-246 Zielona Góra, Podgorn1 50, Poland. Email: P.Szczesniak@iee.uz.zgora.pl INTRODUCTIONModelling a power electronic converter is a complex issue due to the fact of digital control complexity and high number of power converter components. Furthermore, given the increasing number of different modulation strategies, it is necessary to study their impact in converter operation. In order to achieve their goal power converters must be appropriately modelled in simulation or analytical studies. Hence it is necessary to create simple models. The problem has been largely studied and a wide variety of models have been proposed [1]- [6]. However, the use of those models and their simulation in a computer still requires a large amount of resources and circuit simplification and mathematical transformations. In this paper, a comparative evaluation of two modelling approach of complex direct AC-AC frequency converters is presented. The presented modelling methods are based on circuit averaging technique [1], [5] and statespace averaged model [5].The change of frequency in AC voltage is now one of the important functions of solid state power converters. The most desirable features of frequency converters include the possibility of generating load voltages with arbitrary amplitude and generating sinusoidal source and load currents and voltage waveforms, the possibility of providing unity power factor for any load, and finally, their construction using a simple and compact power circuit. The past few years have witnessed remarkable progress in research into direct power AC-AC frequency converters without a DC energy storage element. Many exciting applications have been developed [7]- [12]. The most common is the matrix converter (MC) topology [7]. Another group of AC-AC frequency converters with a buck-boost voltage transformation possibility and without DC energy storage is proposed in [10]-[12], and are known as matrix-reactance frequency converters (MRFC). The expected benefit of these converters is the voltage transfer...

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Section: Validation Of Average Modelsmentioning

confidence: 62%

“…The average state space equations for a MRFC can be represented by the following equation [15], [18]:…”

Section: A Comparison Between Two Average Modelling Techniques Of Ac-mentioning

confidence: 99%

“…The general form of the average state space equations is described by following set of equations [12], [15], [16], [18]:…”

Section: State-space Averaging Techniquementioning

confidence: 99%

Section: A Comparison Between Two Average Modelling Techniques Of Ac-mentioning

confidence: 99%

Section: State-space Averaging Techniquementioning