Three-Phase Hybrid Multilevel Inverter Based on Half-Bridge Modules

Batschauer, Alessandro Luiz; Mussa, Samir Ahmad; Heldwein, Marcelo Lobo

doi:10.1109/tie.2011.2158039

Cited by 106 publications

(67 citation statements)

References 24 publications

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“…When compared, the structure presented in Figure 1 and one proposed in [21] have the same disavantage: both need of isolated power sources for each half-bridge converter and another for the three-phase inverter. However, the hybrid multilevel inverter, shown in Figure 1, reduces the active power processed by the half-bridge converters for high range of modulation indexes when compared to the inverter presented in [21], thus reducing the size of the dc source capacitors and rectifiers of the half-bridge converters [32].…”

Section: Hybrid Invertermentioning

confidence: 99%

“…However, the hybrid multilevel inverter, shown in Figure 1, reduces the active power processed by the half-bridge converters for high range of modulation indexes when compared to the inverter presented in [21], thus reducing the size of the dc source capacitors and rectifiers of the half-bridge converters [32].…”

Section: Hybrid Invertermentioning

confidence: 99%

“…In all cases those topologies have particular modulation schemes and controls. Another hybrid solution was presented in [21], where single-phase half-bridge converters are connected to a three-phase two-level inverter. The single-phase halfbridge converter are connected in a particular way to replace H-bridge converters.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

Bressan¹,

Heldwein²,

Batschauer³

2017

Revista Eletrônica de Potência

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-This work proposes and analyzes modulation strategies for a hybrid three-phase multilevel inverter, which employs two different topologies in a cascade connection, a three-phase Neutral Point Clamped (NPC) converter and single-phase half-bridge converters. Two different modulation schemes are proposed: the hybrid modulation and the space vector modulation. The both modulation schemes can synthesize five voltage levels in the output phase voltage at the hybrid three-phase multilevel inverter with symmetrical dc sources. The modulation schemes operate the three-phase NPC in low-switching frequency and the half-bridge converters in high-switching frequency. Thus, semiconductors with low conduction losses can be used for three-phase NPC, decreasing the semiconductor losses. The hybrid three-phase multilevel inverter structure and modulation schemes are explained in detail and verified by simulation and experimental results.

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Section: Hybrid Invertermentioning

confidence: 99%

Section: Hybrid Invertermentioning

confidence: 99%

See 1 more Smart Citation

Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

Bressan¹,

Heldwein²,

Batschauer³

2017

Revista Eletrônica de Potência

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“…The primary features of a typical MLI include a high quality output voltage (near to a sinusoid wave), low harmonic distortion, lower electromagnetic interference and low voltage stress across the switches [1], [2]. The classical MLI topologies are the cascaded H-Bridge (CHB), diode clamped and flying capacitor types [3]- [5]. The CHB is composed of a series connection of several isolated H-Bridge inverters to generate a stepped output voltage with a desired amplitude and frequency.…”

Section: Introductionmentioning

confidence: 99%

A Level Dependent Source Concoction Multilevel Inverter Topology with a Reduced Number of Power Switches

Jose¹,

Titus²

2016

Journal of Power Electronics

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Multilevel inverters (MLIs) have been preferred over conventional two-level inverters due to their inherent properties such as reduced harmonic distortion, lower electromagnetic interference, minimal common mode voltage, ability to synthesize medium/high voltage from low voltage sources, etc. On the other hand, they suffer from an increased number of switching devices, complex gate pulse generation, etc. This paper develops an ingenious symmetrical MLI topology, which consumes lesser component count. The proposed level dependent sources concoction multilevel inverter (LDSCMLI) is basically a multilevel dc link MLI (MLDCMLI), which first synthesizes a stepped dc link voltage using a sources concoction module and then realizes the ac waveform through a conventional H-bridge. Seven level and eleven level versions of the proposed topology are simulated in MATLAB r2010b and prototypes are constructed to validate the performance. The proposed topology requires lesser components compared to recent component reduced MLI topologies and the classical topologies. In addition, it requires fewer carrier signals and gate driver circuits.

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“…A CHB can generate up to the 2n + 1 level of the phase voltage depending on the modulation index (MI); here, "n" is the number of H-bridge inverters per phase. CHB DC sources are usually obtained from three-phase or single-phase diode-bridge rectifiers [3], [4], [5], [13]with the aid of transformers to provide electrical isolation. The construction processes for symmetrical and asymmetrical cascaded H-bridge inverters are almost similar, except that an asymmetrical CHB uses unequal and isolated DC voltage sources [6].…”

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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Three-Phase Hybrid Multilevel Inverter Based on Half-Bridge Modules

Cited by 106 publications

References 24 publications

Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

A Level Dependent Source Concoction Multilevel Inverter Topology with a Reduced Number of Power Switches

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

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