Implementation of a Multi-level Inverter (MLI) with a New Structure with Different Values of DC Sources
Recent advances in the domain of medium-voltage, high-power, and multilevel inverter have risen to such a level due to their amazing facts such as acceptable harmonic spectrum, ease in control, reduced EMI, filter-free circuit, reduced stress on switches,
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Abstract Recent advances in the domain of medium-voltage, high-power, and multilevel inverter have risen to such a level due to their amazing facts such as acceptable harmonic spectrum, ease in control, reduced EMI, filter-free circuit, reduced stress on switches, and reduced common-mode voltage. This paper describes a new single-phase structure of multilevel inverter, generalized in nature employing a smaller number of overall power components, especially the power switches. 9-level structure is thoroughly explained and discussed with necessary details. In addition, 13-level inverter is also designed and tested with the RL-Load. Extensive simulations are carried out in MATLAB and the corresponding experimental results verifies the performance of the proposed MLI. Nonetheless, the MLI topology is compared with some of the recent reported literatures and in every way considered better. Keywords Power components · DC/AC power conversion · 7-level inverter · 13-level inverter · SPWM
1 Introduction Abundant inadequacies such as larger voltage stress on power switches and the higher harmonics in the output voltage are observed in the classical inverters (two-level) [1]. Nonetheless, the introduction of multilevel inverter (MLI) provides numerous advantages, some of which are lower harmonic content [2, 3], reduced voltage stress as well as reduced switching losses. In addition, some of the important features such as higher efficiency, electromagnetic compatibility, high voltage, and high power applications [4] make MLI suitable for the different industries. The first topology to obtain a higher voltage levels was, the “neutral point clamped”, [5]. The other
B. Mahato (B) · S. Majumdar · S. Vatsyayan · K. C. Jana Department of Electrical Engineering, IIT (ISM), Dhanbad, India e-mail: [email protected] © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 V. Nath and J. K. Mandal (eds.), Nanoelectronics, Circuits and Communication Systems, Lecture Notes in Electrical Engineering 692, https://doi.org/10.1007/978-981-15-7486-3_45
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renowned topology called “Flying Capacitor” structure being implemented to overcome the problems caused by the increasing amount of clamping diodes (in NPCMLI). Nonetheless, the main weakness lies with the FC-MLI is the voltage balancing techniques for the large amount of available capacitors [6]. Nevertheless, the shortcomings of the two classical MLIs mentioned above are overshadowed by the advent of H-bridge configuration due to the fact that it does not need any surplus components in the circuit such as diodes and capacitors. The design of the H-bridge [7] can be cascaded with the same or different magnitudes of DC sources and generally referred to as symmetric CHB-MLI and asymmetric CHB-MLI, respectively, with using same number of power electronic switches. It, therefore, involves the development of such MLIs that can operate with the significant amount of component reduction. The researchers work
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