An Eleven-Level Switched-Capacitor Inverter with Boosting Capability

Multilevel inverters (MLIs) are used on a large scale because they have low total harmonic distortion (THD) and low voltage stress across the switches, making them ideal for medium- and high-power applications. The authenticity of semiconductor devices is one of the main concerns for these MLIs to operate properly. Due to the large number of switches in multilevel inverters, the possibility of a fault also arises. Hence, a reliable five-level inverter topology with fault-tolerant ability has been proposed. The proposed topology can withstand an open-circuit (OC) fault caused when any single switch fails. In comparison to typical multilevel inverters, the proposed topology is fault-tolerant and reliable. The simulation of the proposed topology is conducted in MATLAB-Simulink and PLECS software packages, and the results obtained for normal pre-fault, during-fault, and after-fault conditions are discussed. Experimental results also prove the proposed cell topology’s robustness and effectiveness in tolerating OC faults across the switches. Furthermore, a thorough comparison is provided to demonstrate the proposed topology’s superiority compared to recently published topologies with fault-tolerant features.

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“…Switching losses occur when the switches turn on or off [12,13]. Switching losses can be calculated by using the equations below.…”

Section: Switching Losses (P S )mentioning

confidence: 99%

A Robust Multilevel Inverter Topology for Operation under Fault Conditions

et al. 2021

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“…In the SCMLI, capacitors are utilized as a different kind of dc source. It is not required to use any additional circuits or complex control algorithms in order to achieve voltage balancing using the capacitors [12]- [18].…”

Section: Introductionmentioning

confidence: 99%

A Single-Source Switched-Capacitor 13-Level High Gain Inverter With Lower Switch Stress

et al. 2023

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A switched-capacitor based 13-level inverter with high gain and reduced switch stress is presented in this article. The 13-level single-phase ac output voltage is achieved with a voltage gain of 6 by utilizing a single dc source, 14 switches, 3 capacitors and 1 diode in the proposed converter. Self-voltage balancing is achieved for different types of loads without the use of complicated control schemes or supplementary circuitry. The proposed topology can generate negative polarity without a back-end H-bridge. Consequently, voltage stresses across the switches are reduced. The voltage stress across the switches is limited to 4 times the input DC voltage. Included also is an analysis of power loss for several components of the proposed converter. A comparison is made with contemporary topologies that require a single dc source at the input in terms of several performance characteristics. Resistive (R) and resistive plus inductive (R-L) loads are simulated in this study. To demonstrate the effectiveness of the suggested converter, a laboratory prototype is constructed. In order to demonstrate the viability of the suggested arrangement, the experimental results for step variation in load demand and variation in modulation index under practical loading situations are obtained.

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“…While the flying capacitor inverter employs capacitors to store energy and balance the voltage levels, the diodeclamped inverter uses multiple diodes to clamp the output voltage. The CHB inverter uses multiple H-bridge modules, each with its DC source, to generate the desired output waveform [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Development and Control of a Switched Capacitor Multilevel Inverter

et al. 2023

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This article offers a novel boost inverter construction with a Nine-level quadruple voltage boosting waveform. The primary drawback of conventional MLI is the need for a high voltage DC-DC converter to increase the voltage when using renewable energy sources. Consequently, the developed method, complete with a quadruple voltage boost ability, can alleviate that shortcoming by automatically increased the incoming voltage. A single DC source, two switching capacitors, and eleven switches are all that are used in the newly presented architecture. The voltage of the capacitor automatically balances. The switched capacitor MLI is distinguished by the fewer parts that are required and the substitution of a capacitor for a DC source. The switching capacitor has to be charged and discharged properly in order to produce the nine-level output voltage waveform. The SPSC unit makes these levels attainable. To achieve voltage boosting, switched capacitors are coupled in parallel and series in the conduction channel. The quality of this proposed topology has been analyzed through different parameters based on the components count, THD, and cost; the resulting efficiency reaches 97.85%. The switching order of the proposed method has been controlled by the Nearest Level Modulation Method (NLC). MATLAB and PLECS software were used to evaluate the constructed Nine-level converter.

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An Eleven-Level Switched-Capacitor Inverter with Boosting Capability

Cited by 14 publications

References 25 publications

A Robust Multilevel Inverter Topology for Operation under Fault Conditions

A Robust Multilevel Inverter Topology for Operation under Fault Conditions

A Single-Source Switched-Capacitor 13-Level High Gain Inverter With Lower Switch Stress

Development and Control of a Switched Capacitor Multilevel Inverter

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