Novel Three-Phase AC–AC Sparse Matrix Converters

Kolar, Johann W.; Schafmeister, Frank; Round, S.D.; Ertl, H.

doi:10.1109/tpel.2007.904178

Cited by 380 publications

(145 citation statements)

References 29 publications

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“…In this regard, the IMC is an AC-AC direct power conversion system, which is called a two-stage matrix converter. It has many advantages such as a compact power circuit and sinusoidal input and output currents under normal normal conditions [11][12][13][14][15]. In general, the CSR stage of the IMC is connected to a three-phase voltage source such as three-phase grid and generation system (GS) using a generator or gas engine.…”

Section: Introductionmentioning

confidence: 99%

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Bak

Lee

2016

Energies

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This paper proposes a balanced current control strategy for the current source rectifier (CSR) stage of an indirect matrix converter (IMC) under unbalanced grid voltage conditions. If the three-phase grid connected to the voltage source inverter (VSI) of the IMC has unbalanced voltage conditions, it affects the currents of the CSR stage and VSI stage, and the currents are distorted. Above all, the distorted currents of the CSR stage cause instability in the overall system, which can affect the life span of the system. Therefore, in this paper, a control strategy for balanced currents in the CSR stage is proposed. To achieve balanced currents in the CSR stage, the VSI stage should receive DC power without ripple components from the CSR stage. This is implemented by controlling the currents in the VSI stage. Therefore, the proposed control strategy decouples the positive and negative phase-sequence components existing in the unbalanced voltages and currents of the VSI stage. Using the proposed control strategy under unbalanced grid voltage conditions, the stability and life span of the overall system can be improved. The effectiveness of the proposed control strategy is verified by simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Bak

Lee

2016

Energies

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“…A classical alternative that can immediately be brought out for consideration is the direct or indirect matrix converter, where 18 switches are used in total. That represents six switches more than the back-to-back configuration, but has the advantage of removing the intermediate electrolytic capacitor for compactness and lifespan extension If the heavy switch count is still of concern, those indirect sparse matrix converters proposed in [7], [8] can be considered, where the minimum switch count attain-able is nine, but at the expense of supporting only unidirectional power flow.. Neither storage capacitor nor dc micro source is again needed, which thus renders the conditioners.…”

Section: Introductionmentioning

confidence: 99%

Performance and analysis for improvement of power quality and voltage sag mitigation

Prasad¹,

Kumar²,

Reddy³

et al. 2015

International Journal of Innovative Research in Electrical, Ele

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Aiming further to reduce its switching losses, an appropriate discontinuous modulation scheme is proposed and studied here in detail to doubly ensure that maxi-mal reduction of commutations is achieved. With an appropriately designed control scheme had incorporated with nine-switch converter is shown to favorably raise the overall power quality and voltage mitigation hence justifying its role as a power conditioner at a reduced semiconductor cost. A nineswitch power converter having two sets of out-put terminals was recently proposed in addition of the traditional backto-back power converter that uses 12 switches in total. The nine-switch converter had already been proven to have certain advantages, in addition to its component saving topological features. Despite these advantages, the nine-switch converter has so requiring an oversized dc-link capacitor, limited amplitude sharing, and constrained phase shift between its two sets of output terminals. Instead of accepting these tradeoffs as limitations, a nine-switch power conditioner is proposed here that virtually -converts‖ most of these topological shortfalls are overcome into interesting performance advantages.

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“…It basically consists of nine four-quadrant switches, which connects the three-phase input to the three-phase output ( Fig. 1) [5]. Matrix converter has also an added advantage of input and output power factor decoupling.…”

Section: Introductionmentioning

confidence: 99%

“…Various modulation schemes for matrix converters are described in the literature, which require addition of the harmonics of the output frequency [3,4] and input frequency to the modulation indices, and require sector information for generation of PWM signals [4][5][6][7][8]. A simple modulation method is presented in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…9, which neither needs any sector information nor any harmonic injection for calculation of the duty ratios. Also the output voltage is synthesized to its maximum capacity without compromising any benefits of the conventional techniques [4][5][6][7][8]. The modulation method is also extended for an unbalance condition at input and over-modulation at the output [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Research on AC–AC Converters without Intermediate Storage and Their Applications in Power‐Electronic Transformers and AC Drives

Mohapatra¹,

Gupta²,

Thuta³

et al. 2009

IEEJ Transactions Elec Engng

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AC-AC converters (e.g. matrix converters) are mostly semiconductor solutions for applications where intermediate energy storage is eliminated. This paper summarizes the research done and being carried out at the University of Minnesota for applications in motor drives and power-electronic transformers with advanced features. This paper presents a carrier-based modulation method for matrix converters and its application during for both input unbalance and output over-modulation. Various topologies of matrix converter are described for both drives and power-electronic transformers. These topologies have some inherent benefits like common-mode voltage elimination across the bearings of the motor/generator and controllable power factor at the input side. Some of the described technologies require open-ended machines as load and thereby some advantages like enhanced output voltage (1.5 times the output of normal three terminal load) are achieved. 

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Novel Three-Phase AC–AC Sparse Matrix Converters

Cited by 380 publications

References 29 publications

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Balanced Current Control Strategy for Current Source Rectifier Stage of Indirect Matrix Converter under Unbalanced Grid Voltage Conditions

Performance and analysis for improvement of power quality and voltage sag mitigation

New Research on AC–AC Converters without Intermediate Storage and Their Applications in Power‐Electronic Transformers and AC Drives

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