Conference Papers
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Item Performance Analysis of Novel Multilevel Inverter with Minimum Number of Switching Components(Institute of Electrical and Electronics Engineers Inc., 2023) Kumar, T.A.; Yellasiri, Y.; Nageswar Rao, B.N.; Aditya, K.; Shiva Naik, B.S.; Karunakaran, E.The immense growth in Multilevel inverters are a great development for industrial and renewable energy applications due to their dominance over conventional two-level inverters concerning size, rating of switches, filter requirement, and efficiency. According to the current topology, the multilevel inverter employing the bidirectional converter is a DC connection that serves as the bidirectional inverter's input power. The bidirectional inverter is configured to output a voltage with several levels by altering the voltage with the bidirectional converter. Also, because there is no need for a low-frequency transformer or an LC filter at the output stage of the multi-level inverter in the present topology, the frequency does not pose any difficulties. In comparison to other traditional topologies, using an asymmetrical multilevel inverter architecture employs fewer switching components to create greater levels. This study proposes a 27-level multilevel inverter with fewer switching components. To validate the technique, the simulation results are shown. © 2023 IEEE.Item Novel Nine-level Inverter Topology with Boosting Ability for Electric Vehicle Application(Institute of Electrical and Electronics Engineers Inc., 2023) Aditya, K.; Yellasiri, Y.; Shiva Naik, B.S.; Nageswar Rao, B.N.; Karunakaran, E.; Reddy, R.D.This paper proposes a new switched-capacitor (SC) based multilevel inverter (MLI) with a boosting gain of four for electric vehicle (EV) applications. The proposed SC-based ninelevel quadruple boost inverter (SC-NLQBI) topology consists of 13 semiconductor switches, three capacitors, and a single input DC supply. It generates nine level voltage waveform, which lessens the requirement for extra filters. Compared to the current nine-level inverter, the new SC-NLQBI topology is simple, compact, and requires fewer parts. Here, a simple triangular carrier signal-based sinusoidal pulse width modulation (SPWM) method is used to generate the required gating pulses. While the proposed topology is being modeled in a MATLAB/Simulation platform using both normal and problematic conditions, the results are analyzed. © 2023 IEEE.Item Design of a New Single-Phase 15-Level Inverter with Minimized Components(Institute of Electrical and Electronics Engineers Inc., 2023) Nageswar Rao, B.N.; Yellasiri, Y.; Shiva Naik, B.S.; Aditya, K.; Karunakaran, E.; Kumar, M.V.Multilevel inverters (MLI) provide a number of challenges, the most significant of which is the requirement for a high number of power semiconductors and separate dc supplies to assimilate renewable energy into a grid successfully. Because of this, reducing the number of components used in these kinds of inverters is quite important. Because transformer-based multilevel inverters (TBMIs) have become more commonplace, the use of many dc supplies in the cascaded inverter is no longer necessary for the device to function. Based on the outcomes of this study, a new transformer-based MLI with fifteen levels (15L) and eight switches can be built with only one dc source required. The suggested MLI consists of three isolated transformers. The suggested MLI structure has many unique benefits, including the use of fewer switching components and the availability of self-galvanic isolation. The MATLAB simulation results are carried out to evaluate the effectiveness of the suggested TBMLI. In addition, a comparison of the suggested structure to other recent configurations is presented. © 2023 IEEE.Item A Single DC-source Asymmetrical Multilevel Inverter With Solid State Transformer With New Switching Approach(Institute of Electrical and Electronics Engineers Inc., 2024) Karunakaran, E.; Yellasiri, Y.; Nageswar Rao, B.N.; Vivek, P.S.S.; Aditya, K.Cascaded H-bridge (CHB) MLI have emerged as the preferred choice due to their high quality in output waveforms with low harmonic distortion. However, a key limitation in these inverters lies in the requirement of a dedicated DC source for each bridge. To overcome this challenge, there is a transition towards asymmetrical cascaded H-bridge (ACHB) MLIs, enabling the use of a variable DC source for each bridge. The variability in DC supply is achieved through a high-frequency link. This paper introduces a novel optimized switching technique for asymmetrical cascaded H-bridge (ACHB) MLIs with a single DC input incorporating a high-frequency link (HFL). The effectiveness of the suggested approach in achieving a 27-level asymmetric multilevel inverter is substantiated by experimental outcomes obtained through MATLAB/Simulink simulations. © 2024 IEEE.Item Design of a Single Phase Twenty Five Level Grid Connected Inverter for Photovoltaic System(Institute of Electrical and Electronics Engineers Inc., 2024) Nageswar Rao, B.N.; Yellasiri, Y.; Kishan, D.; Karunakaran, E.Galvanic isolation is a crucial component of grid-connected solar PV systems. Despite the increasing adoption of multilevel inverters (MLIs) for grid-connected applications, the literature lacks sufficient discussion on the isolation of these inverters. This paper introduces a 25-level isolated multilevel inverter topology that utilizes only fourteen switches. The proposed configuration incorporates three transformers, each connected via a combination of three bidirectional switches and two H-bridges. This single-phase isolated inverter efficiently generates a 25-level AC output voltage with a voltage gain of 6 while requiring fewer switches. The design of the proposed converter is compared with state-of-the-art multilevel inverters described in the literature. Simulations conducted using MATLAB software demonstrate that the proposed MLI delivers high-quality power, even under dynamic conditions. © 2024 IEEE.