Reduced switch‐count structure for symmetric multilevel inverters with a novel switched‐DC‐source submodule

Avanaki, Hossein Nasiri; Barzegarkhoo, Reza; Zamiri, Elyas; Yang, Yongheng; Blaabjerg, Frede

doi:10.1049/iet-pel.2018.5089

Cited by 32 publications

(13 citation statements)

References 28 publications

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“…Conventional cascaded transformer based 9-level MLI is compared with proposed 9-level MLI. The performance is analyzed and tested for multi carrier PWM technique [29].…”

Section: Survey On Mlirs Designsmentioning

confidence: 99%

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Trends and Challenges in Multi-Level Inverter with Reduced Switches

et al. 2021

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Multilevel inverter had been paid a lot of attention from the academia and research community in recent times due to its role in high and medium power applications. In this paper, a detailed survey is made on the recently designed multilevel inverter to find the suitability of the inverters for particular applications. Research is performed on various types of multilevel inverters such as: Symmetric, asymmetric, hybrid and modularized multilevel inverter in order to identify the issues in generating more levels at the output. A summary of various issues in multilevel inverter with reduced switch count is provided, so that a novel topology of multilevel inverter can be designed in future. Further, an 81-level switched ladder multilevel inverter using unidirectional and bidirectional switches is designed. Simulation work is carried out using Matlab/Simulink in order to validate the performance of the inverter with change in resistive load and impedance load. The output of the 81-level inverter is fed to a 110 V, 186.5 W single phase induction motor in order to study the characteristics, further speed control of motor is performed by varying the input voltage of the motor and the results are presented.

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“…Conventional cascaded transformer based 9-level MLI is compared with proposed 9-level MLI. The performance is analyzed and tested for multi carrier PWM technique [29].…”

Section: Survey On Mlirs Designsmentioning

confidence: 99%

“…Inverter proposed in [27] has higher total standing voltages. The presented topology in [28,29] requires more circuits to achieve more output levels. A complex control is necessary in-order to design a bi-direction MLI [30].…”

Section: Issues In MLI With Low Device Countmentioning

confidence: 99%

Trends and Challenges in Multi-Level Inverter with Reduced Switches

et al. 2021

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“…In [15], the development of a switched ladder MLI is described to produce the highest level with smaller components. Reduced switch designs have been created in [16], [17], although the authors can use stronger DC sources to produce the necessary output voltage level. With the different sources (V dc2 -V dc1 ) used in [18], the levelgenerating unit cannot synthesise the voltage level.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Implementation of Switched Capacitor-based Multi-Level Inverter for Electric Vehicles Applications

Manivel

Kaliappan²

2023

ELEKTRON ELEKTROTECH

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Significant interest has been shown in switched capacitor (SC)-based multi-level inverters (MLIs), which decrease the need for a DC supply and enhance power quality. The common issues with SC-MLIs include an uneven distribution of conducting paths, increased voltage drop across capacitors, the sum of all inverter DC link voltages across the highest voltage rated switches, and a higher total standing voltage (TSV). The purpose of this paper is to create a SC-MLI with less components in order to maintain a constant voltage across the capacitors, to obtain higher voltage gain with fewer parts, fewer conducting routes, lower TSV, and to create a more affordable and effective inverter. The structure of the MLI is created by a cascade interconnection between the number of SC cells. A single input multiple output (SIMO) converter boosts the DC-link voltage over the stable DC voltage of the solar panels using a modified perturb and observe (P&O) method. Additionally, fewer switches in the conduction path and 50 % of the switches operating at normal frequency guarantee a decrease in an overall loss of power in the proposed network. The benefits of the recommended MLI are made clear by comparing them with 17-level MLIs in terms of the number of elements, stress, gain, and cost factor. Detailed experimental results are shown under various transient conditions to show that the 17-level prototype is operationally viable. The total harmonic distortion (THD) is found to be identical and is less than 5 %, which meets IEEE standards.

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“…Thus, these types of MLIs are mostly unsuitable for grid applications and renewable energy conversions. For the MLI that are unipolar in nature, [9][10][11][12] polarity generation (i.e., positive and negative voltage levels) is done by utilizing H-bridge circuits. Although the H-bridge roughly doubles the voltage produced by the level generation (LG) section, the switches of this circuit endures the highest voltage stress, which is equal to the summation of total DC voltages.…”

Section: Introductionmentioning

confidence: 99%

A novel extendable multilevel inverter for efficient energy conversion with fewer power components: Configuration and experimental validation

Meraj,

Yu,

Rahman

et al. 2023

Circuit Theory & Apps

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SummaryMultilevel inverters (MLIs) are widely used in various sectors of power electronics. Some major benefits of using MLI are the high‐quality voltage output, harmonic reduction, and efficiency. However, MLIs also bear a range of disadvantages including an excessive number of components, high total standing voltage (TSV), and complicated control scheme. Thus, a novel cross‐switched neutral point clamped (CSNPC) nine‐level inverter is proposed. Many of the suggested MLIs use a large number of DC supplies and additional switches that are not fully utilized and generate high power loss. However, the proposed MLI topology has a smaller number of power electronic switches and DC supplies, leading to higher energy efficiency. Moreover, a simplified high frequency modulation technique, named hysteresis‐band‐based discontinuous pulse width modulation (DPWM) is devised to control the proposed MLI. This modulation scheme has effectively minimized capacitor voltage imbalance. Furthermore, the designed structure is extendable to a modular MLI, without any additional H‐bridge circuit. To verify its benefits over other recent similar types of MLIs, a thorough comparison is presented for the number of components and power losses. The proposed MLI has showed 95.54% efficiency, and the modular CSNPC can achieve a total harmonic distortion (THD) of 6.43%.

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Reduced switch‐count structure for symmetric multilevel inverters with a novel switched‐DC‐source submodule

Cited by 32 publications

References 28 publications

Trends and Challenges in Multi-Level Inverter with Reduced Switches

Trends and Challenges in Multi-Level Inverter with Reduced Switches

Analysis and Implementation of Switched Capacitor-based Multi-Level Inverter for Electric Vehicles Applications

A novel extendable multilevel inverter for efficient energy conversion with fewer power components: Configuration and experimental validation

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