This study introduces a novel bidirectional hybrid T-type converter configuration named the single-capacitor unit-based hybrid T-type converter (SCU-HTC). This innovative architecture employs a single capacitor, leading to a 50% reduction in total capacitor count when compared to conventional T-type inverters. The design operates in two primary modes: buck mode and normal mode. In buck mode, the single capacitor’s voltage is maintained at half of the DC link voltage, resulting in lower output voltage magnitude and improved total harmonic distortion. This outcome is distinct from standard T-type inverters. Conversely, during normal mode, the topology functions either as a three-phase two-level inverter or a three-phase three-level inverter. To facilitate seamless operation in both buck and normal modes, a new switching strategy is proposed. This strategy ensures balanced capacitor voltage, enhancing the stability of the DC link voltage. The proposed architecture also exhibits power factor correction (PFC) capabilities. Unlike many PFCs that struggle with maintaining unity power factor (UPF) across various power levels, often necessitating additional circuitry and control complexity, the suggested topology for rectifier mode offers sensor-less self-balancing that consistently upholds UPF. Notably, this topology also effectively addresses issues related to capacitor voltage balance. Experimental validation of the proposed concept underscores its viability.

The objective of this work is to demonstrate a design-centric dynamic teaching technique in a power electronics course for undergraduate students at the National Institute of Technology Raipur. This strategy intends to provide a systematic approach for designing a converter over the course of a semester in order to acquire higher-order cognitive skills. Traditional teaching approaches, as well as several recently proposed techniques in the literature, are inadequate at fostering higher-order cognitive skills. Considering the aforementioned challenges, the proposed methodology involves dividing the enrolled students into groups exhibiting students of varying academic proficiency levels. These groups will be tasked with the completion of a semester-long project that entails the design and development of a DC-DC boost converter, from conception to a fully functional prototype. As a result, this technique will gradually instill many desirable skill sets such as managerial, communication, problem solving, critical thinking, software, and hardware development competency, and therefore they will be able to establish a creative mentality. Furthermore, these skill sets will drive students to pursue higher education, technical jobs, and research possibilities in the future. The course saw an increase in student interest and proficiency in practice.

Electric vehicles are popular in these days and gaining height in all country of the world because of the pollution due to fossil fuel and green house effect. The battery powered electric vehicle is going to popular in the crowd but also this segment is suffering from few problems like range anxiety, efficiency, fixed battery size, charging time, etc. The objective is to develop an efficient and reliable solution that allows EV owners to replace their depleted batteries quickly and easily with fully charged ones, eliminating the need for lengthy charging times. The investigation involves a thorough analysis of existing swappable battery technologies, considering factors such as battery design, compatibility, safety, and operational considerations. The proposed solution presents a novel battery design that incorporates standardized connectors and protocols to ensure seamless integration and compatibility across different EV models. The methodology outlines the development process, including battery pack design, mechanical considerations, and electrical system integration. This research contributes to the advancement of sustainable transportation by providing an innovative solution to enhance the practicality and accessibility of electric vehicles through efficient swappable battery technology.

Electric Vehicle (EV) is getting popular day by day and most of the countries in the world are converting their transport system to electric infrastructure. Battery pack is one of the main sources of energy for EV. Fixed batteries of different power are utilized in different types of EVs. The objective of this research is to explore the potential of reconfigurable battery systems in addressing the limitations of fixed battery sources in electric vehicles (EVs). The investigation involves a comprehensive analysis of the current challenges associated with fixed battery sources, including limited range, long charging times, battery degradation, inflexibility. The research focuses on developing a reconfigurable battery solution that allows for flexible battery configurations, enabling enhanced range, reduced charging times, improved battery performance, interchangeability between different EV models. The methodology encompasses battery design and engineering, integration with EV systems, testing and evaluation of reconfiguration mechanisms, and performance analysis through simulations and experimental validation. The results of this research provide insights into the feasibility, benefits, and contributing to the advancement of sustainable transportation and electric vehicle technology.

In this study, a comprehensive analysis of existing charging stations and their emerging technologies is conducted to optimize the usage and intelligence of the existing charging station. Charging stations are currently designed for specific vehicles, such as two-wheelers, four-wheelers, and heavy commercial vehicles. The research proposes a solution that designs and analyzes smart charging stations, which can transform any existing charging station into a smart one. The technique describes the operation of smart charging stations, which employ a switching mode that accommodates various segments of electric vehicles. The analysis of switching mode involves consideration of power, current, and voltage, duty cycle is adjusted to achieve desired voltage level. Furthermore, the methodology demonstrates that the smart charger can communicate with electric vehicles battery packs and adapt the desired output power based on the battery pack configuration.

In this paper, an improved non-isolated multiple input boost dc-dc converter (MIBC) with an energy storage unit has been proposed. The topology can transfer energy from numerous energy sources to the load simultaneously or independently. The circuit architecture so designed that it has less total peak inverse voltage (TPIV) and less total current stress than a conventional converter. The topology is provided with an energy storage unit (battery), which realizes the bidirectional power flow operation for simultaneous absorption of excess energy generated by the input sources. The advantages of the proposed topology include the simple structure and reduced number of components (active/passive switches, inductors, capacitors, and current/voltage sensors). The proposed converter is investigated with different operational modes and design considerations. For gate pulse generation flip-flops are used which have the capability to operate for a wide range of duty ratios. For validation, the topology has been modeled and simulated in MATLAB/Simulink environment. The suitability of the proposed topology for photovoltaic applications has been validated with the obtained results.

Now a days, flickering in LED is a challenge for researchers as it has adverse effect on human health. Using electrolytic capacitor was the initial solution for flickering. However, electrolytic capacitors are not preferred for LED driver owing to short lifetime and more prone to fault. There exists several ripple cancellation (RC) techniques discussed in literature. However, they suffer from complex control structures and high stress across the switches. In this regard, this paper proposes a novel series current RC method to eliminate the double line low frequency ripple and also have removed the electrolytic capacitor. The key features of the proposed RC method include UPF operation throughout without any external circuitry by using the multilevel converter, simple control and reduced smoothing capacitance value. The validation of the proposed method in simulation has been presented.

The maximum amount of load demand is supplied through batteries instead of a PV array for standalone applications in rural areas. This demands proper and equal battery source utilization for multilevel inverters (MLIs) with multiple sources for maintaining a better life of the battery. In this regard, a two-source nine-level MLI topology with the characteristics of equal source utilization is proposed. The number of voltage levels further increased either by increasing the number of switches or cascaded connection of the cell for improving the quality of the waveform. The proposed topology has the capability of equal voltage source utilization, which increases the balance in the charge of batteries by proposing a new switching method for generating gate pulses. The effectiveness and robustness of the developed topology are carried out under various operating conditions in the Simulink environment. Finally, an experimental test bench of the developed topology is built and the acquired experimental results validate the simulation results.

Multilevel Inverters (MLI) faces severe performance limitation owing to the low reliability of the power electronic devices and capacitor voltage balancing. Therefore, a novel fault tolerant MLI topology is proposed in this paper. The proposed topology can sustain single and multiple switch fault on all of its main inverter switches. The switching scheme opted results in inherent DC-link capacitor voltage balancing and equal (or best) voltage source utilization, under both healthy and faulty conditions. The validity of the proposed topology is verified by the obtained OPAL-RT results.

Proper functioning of the Multilevel Inverter (MLI) is dependent on the healthy performance of its power electronic components. Amongst all power electronic components, power electronic switches and capacitors are most prone to faults. Thus, a failure on these devices may lead to undesired outcomes or even complete shutdown of the application. Thus, the development of a highly reliable MLI topology which is able to deliver the desired output, during worst faulty conditions, has become a recent research trend. In this paper, a novel fault tolerant MLI topology is proposed which is able to sustain single switch failure on all of its main inverter switches. Not only that, the proposed topology is able to achieve inherent DC-link capacitor voltage balancing. The reliability of the proposed topology is analyzed mathematically. The validity of the proposed topology is verified by the obtained OPAL-RT results.

MLI is receiving tremendous popularity due to its reduced voltage stress across switches and low THD in output voltage. MLI incorporates large number of semiconductor switches which increases complexity and reduces efficiency. Therefore, a great deal of attention is paid towards reducing the number of semiconductor switches. The reduction of switch count reduces the size, cost and complexity and enhances overall performance. In this paper a modified topology for symmetrical and asymmetrical configuration of MLI is proposed for increased output voltage levels with reduced number of semiconductor switches. A comprehensive study of proposed configuration of MLI is carried out in terms of switch counts and blocking voltage. The detailed simulation study of the proposed concept has been carried out using MATLAB/SIMULINK and validated experimentally.