A New Multilevel Converter Topology With Reduced Number of Power Electronic Components

Ebrahimi, Javad; Babaei, Ebrahim; Gharehpetian, Gevork B.

doi:10.1109/tie.2011.2151813

Cited by 463 publications

(348 citation statements)

References 27 publications

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“…The asymmetrical topologies presented in [6] and [20] are the best in synthesizing more levels in inverter output voltage with the same number of DC sources used in the symmetrical modes. The realization of asymmetrical MLIs, which has to be provided from DC voltage sources with different values, can be very costly and difficult.…”

Section: Comparative Analysismentioning

confidence: 99%

“…The reduction in the switch count is further assessed with a modified level selection part by connecting DC sources in series/parallel [19]. A multi cell arrangement is presented to reduce the bidirectional count requirement in the level selection part [20]. The bidirectional switches are further reduced by replacing them with unidirectional switches for the top and bottom arms of the level section part [21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Karasani¹,

Borghate²,

Meshram³

et al. 2016

Journal of Power Electronics

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In this paper, a single phase modified switched-diode topology for both symmetrical and asymmetrical cascaded multilevel inverters is presented. It consists of a Modified Switched-Diode Unit (MSDU) and a Twin Source Two Switch Unit (TSTSU) to produce distinct positive voltage levels according to the operating modes. An additional H-bridge synthesizes a voltage waveform, where the voltage levels of either polarity have less Total Harmonic Distortion (THD). Higher-level inverters can be built by cascading MSDUs. A comparative analysis is done with other topologies. The proposed topology results in reductions in the number of power switches, losses, installation area, voltage stress and converter cost. The Nearest Level Control (NLC) technique is employed to generate the gating signals for the power switches. To verify the performance of the proposed structure, simulation results are carried out by a PSIM under both steady state and dynamic conditions. Experimental results are presented to validate the simulation results.

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Section: Comparative Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Karasani¹,

Borghate²,

Meshram³

et al. 2016

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…A trinary based algorithm is presented in [13] that needs minimum components and also many structures were developed to reduce number of switches , driver units, dc sources , maximum voltage rating. In [14]- [16] fundamental structure have been developed but number of switches and voltage rating of switches are high. A new topology is presented in [17] and three algorithms have been explained that reduces the number of components used.…”

Section: Introductionmentioning

confidence: 99%

Neural network controller based sequential switch cascaded H-bridge multilevel inverter

Ramya¹,

Rani²,

Kumar³

2018

IJET

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This paper presents a novel cascaded multilevel inverter structure with reduced devices. This structure is termed as sequential switch cascaded multilevel inverter. The basic asymmetrical hybrid circuit is described and is capable of generating 17 voltage levels. The various modes of deriving 17 levels are explained and the proposed topology is compared with existing topologies in various aspects. Neural network controller can be used to generate the gating pulses. The algorithm can be trained online by using back propagation algorithm and also an algorithm to determine the number of levels, maximum voltage ratings and power loss is explained. The simulation can be done by MATLAB Simulink.

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“…A single-phase MLI with four input sources is proposed in [20]; this topology comprises three DC sources with a fixed neutral point. In [15], Najafi et al propose the so-called "reversing voltage" MLI topology, which also has a fixed neutral point for its DC sources.…”

Section: Introductionmentioning

confidence: 99%

A New Single-Phase Asymmetrical Cascaded Multilevel DC-Link Inverter

Ahmed¹,

Hendawi²

2016

Journal of Power Electronics

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This paper presents a new single-phase asymmetrical cascaded multilevel DC-link inverter. The proposed inverter comprises two stages. The main stage of the inverter consists of multiple similar cells, each of which is a half-bridge inverter consisting of two switches and a single DC source. All cells are connected in a cascaded manner with a fixed neutral point. The DC source values are not made equal to increase the performance of the inverter. The second circuit is a folded cascaded H-bridge circuit operating at a line frequency. One of the main advantages of this proposed topology is that it is a modular type and can thus be extended to high stages without changing the configuration of the main stage circuit. Two control schemes, namely, low switching with selective harmonic elimination and sinusoidal pulse width modulation, are employed to validate the proposed topology. The detailed approach of each control scheme and switching pulses are discussed in detail. A 150W prototype of the proposed system is implemented in the laboratory to verify the validity of the proposed topology.

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A New Multilevel Converter Topology With Reduced Number of Power Electronic Components

Cited by 463 publications

References 27 publications

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Neural network controller based sequential switch cascaded H-bridge multilevel inverter

A New Single-Phase Asymmetrical Cascaded Multilevel DC-Link Inverter

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