Symmetrical Cascaded Switched-Capacitor Multilevel Inverter Based on Hybrid Pulse Width Modulation

Cao, Lingling; Jiang, Lin; Chen, Shikai; Ye, Yuanmao

doi:10.3390/en14227643

Cited by 8 publications

(8 citation statements)

References 24 publications

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“…Each of the described basic SC units/generalized SCCs can be connected to an unfolding FB cell, and then, through the cascaded connection, multiple-dc-source SC-MLIs can be realized, as shown in Fig. 26 [88]. In this case, adjusting the voltage magnitude of different dc sources can lead to the development of different symmetric or asymmetric input-dc-source-based MLIs [76].…”

Section: B Multiple Dc-source Sc-mlismentioning

confidence: 99%

“…In this case, a hybrid modulation method that is a combination between the phase-shifted (PS) and LS-SPWM techniques can be adopted [67], [185]- [187]. The 7L single-input dc-source inverters presented in [20], [25], [39], and [67], the 11L double-port SC inverter presented in [186], the 7L double-port SC inverter with the cascaded connection of two symmetric SC-based inverters proposed in [88], and the 13L and 17L single-input-dc-source inverters reported in [29], [35], [37], and [38] are a few types of SC-MLI topologies that have RSS capability to be applied for this type of hybrid PS/LS-SPWM technique. The concept of this technique is based on the number of RSSs available per each output voltage level.…”

Section: Challenges and Opportunitiesmentioning

confidence: 99%

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Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

101

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Multilevel inverters (MLIs) with switched-capacitor (SC) units have been a widely rehearsed research topic in power electronics since the last decade. Inductorless/transformerless operation with voltage-boosting feature and inherent capacitor self-voltage balancing performance with a reduced electromagnetic interference make the SC-MLI an attractive converter over the other available counterparts for various applications. There have been many developed SC-MLI structures recently put forward, where different basic switching techniques are used to generate multiple (discrete) output voltage levels. In general, the priority of the topological development is motivated by the number of output voltage levels, overall voltage gain, and full dc-link voltage utilization, while reducing the component counts and stress on devices for better efficiency and power density. To facilitate the direction of future research in SC-MLIs, this article presents a comprehensive review, critical analysis, and categorization of the existing topologies. Common fundamental units are generalized and summarized with their merits and demerits. Ultimately, major challenges and research directions are outlined leading to the future technology roadmap for more practical applications.

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Section: B Multiple Dc-source Sc-mlismentioning

confidence: 99%

Section: Challenges and Opportunitiesmentioning

confidence: 99%

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

101

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show abstract

“…Changing from cascaded to LDN topologies affects the implementation of PWM. CHB is an MLI because it uses 2 H-bridge [19]. Considering the many advantages of MLI control strategies and suggesting a more thorough analysis of different topologies.…”

Section: Introductionmentioning

confidence: 99%

“…The structure can end up being bigger, bulkier, and more complicated as a result. Over the last several years, efforts have been undertaken to reduce the number of power switches, and voltage stress and increase efficiency in MLIs, these efforts have been evaluated in the literature [11,19,20]. The proposed research is primarily concerned with providing an analysis of MLI topologies created with the specific purpose of minimizing the number of power switches.…”

Section: Introductionmentioning

confidence: 99%

Single DC-link-based 5-level MLI topology for renewable and grid applications with fewer switches

Tiwari,

Agarwal

2024

Electr Eng

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This article describes a 5-level single DC source multilevel inverter (SDS-MLI) with fewer components and optimum efficiency. Multiple DC source MLI topologies are presently deemed unsuitable for a range of applications, such as renewable energy (RE) conversion systems and grid applications, while single DC source MLI topologies are more suitable. Existing MLI circuits have more active/passive components, but the SDS-MLI design employs a level-doubling network, requires fewer components, and reduces the DC-link voltage for grid applications. The SDS-MLI uses one capacitor, six switches, and a DC supply. A primary control method enforces a well-known phase disposition carrier arrangement to actualize the presented configuration. Existing systems are evaluated based on the number of active and passive components, their efficiency, capacitor voltage, and voltage stress. In comparison to existing topologies, SDS-MLI has fewer components, a lower capacitor voltage, and less TSVs to achieve an efficiency of 98.66%. MATLAB/Simulink and experimental setups are used to verify the SDS-MLI architecture. On the basis of experimental setup and simulation, the number of load voltage & load current waveforms under various situations such as variable load, varied input supply, different frequencies, and different modulation indexes are shown.

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“…Thus, switched-capacitor inverters are commonly accepted. The switched-capacitor inverters were created as a result of a topology described in [4][5][6]. Many more topologies have emerged in the case of switched-capacitor MLIs [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A Generalized Switched-Capacitor Multilevel Inverter Topology with Voltage Boosting Ability and Reduced Inrush Current

et al. 2022

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This article presents a novel quadruple boost inverter (QBI) with an integrated boost stage that comprises an inductor, a capacitor, a switch, and an input source. The inductor on the input side limits the inrush current and also the capacitor charging current ripples. The QBI topology comprises a dc source, an input inductor, nine switches, three diodes, and capacitors. This produces a nine-level waveform, which reduces the need for additional filters such as inductors and capacitors. The proposed QBI is elementary, compact, and needs fewer components than existing nine levels inverter. Compared to the typical triangular carrier-based sinusoidal pulse width modulation, the newly developed parabolic level-shifted carrier has a much greater RMS value. Another advantage of the proposed topology is extension for generating higher voltage levels without increment in the blocking voltage across the switches. This makes the topology ideal for medium voltage high power applications. The output voltage has been determined in terms of selection, sizing, and expression. The proposed QBI is compared to existing similar nine-level inverters in order to assess its efficacy. The experiment is performed on a laboratory prototype to state the practical feasibility of QBI topology for the inductive load, variation in input, load, and modulation index.

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Symmetrical Cascaded Switched-Capacitor Multilevel Inverter Based on Hybrid Pulse Width Modulation

Cited by 8 publications

References 24 publications

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Single DC-link-based 5-level MLI topology for renewable and grid applications with fewer switches

A Generalized Switched-Capacitor Multilevel Inverter Topology with Voltage Boosting Ability and Reduced Inrush Current

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