https://dspace.iiti.ac.in:8080/jspui/handle/123456789/12112 Tue, 12 May 2026 17:17:50 GMT 2026-05-12T17:17:50Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17600 Title: Rotary TENG based pressure sensor Authors: Patidar, Praveen Abstract: Maintaining optimal tire pressure is critical for ensuring vehicle safety, fuel efficiency, tire lifespan, and handling performance. Traditional Tire Pressure Monitoring Systems (TPMS), while widely adopted, typically depend on battery-powered electronic sensors placed inside the tires (direct TPMS) or on ABS systems and wheel speed sensors (indirect TPMS). These methods face challenges such as sensor battery depletion, system complexity, cost of integration, and sensitivity to vehicle dynamics. Addressing these limitations, this thesis proposes a novel passive TPMS based on Triboelectric Nanogenerator technology, which operates without external power sources. The designed system utilizes a rotary TENG comprising a rotor-stator configuration. The rotor is embedded with PTFE-based flexible flaps, while the stator includes conductive electrodes over Kapton film. As the wheel rotates, contact-separation motion between the rotor flaps and stator surface induces triboelectric charges, producing a measurable alternating electrical signal. Importantly, the rotational speed (RPM) of the wheel is influenced by changes in tire pressure due to variations in the rolling radius. Thu, 03 Jul 2025 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17600 2025-07-03T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17564 Title: Design of multi phase induction motor for electric vehicle application Authors: Gupta, Mayank Abstract: The growing demand for robust, fault-tolerant, and high-performance electric drives in industrial, automotive, and renewable energy applications has intensified interest in multiphase induction machines. Unlike conventional three-phase motors, multiphase systems offer advantages such as reduced torque ripple, enhanced fault tolerance, and higher power density. However, with the increase in phase number and variations in winding configuration, analyzing the magnetic field behavior becomes increasingly complex, particularly in terms of the spatial distribution of magnetomotive force (MMF). This thesis presents a comprehensive investigation into the MMF distribution of multiphase induction motors, with a primary focus on deriving generalized equations for resultant MMF under various winding and connection schemes. The study begins with an introduction to the fundamental operating principles of multiphase induction machines, outlining their advantages, applications, and the challenges involved in their analytical modeling. Tue, 03 Jun 2025 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17564 2025-06-03T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17552 Title: Non isolated charger design for electric vehicles Authors: Kumar, Abhishek Abstract: This thesis presents the design, simulation, and partial hardware implementation of a non-isolated buck converter-based charger for electric vehicle (EV) battery applications. The proposed system is engineered to perform high-efficiency step-down DC-DC conversion from a high-voltage source to a lower battery voltage, ensuring safe and optimized charging. The initial phase of the project includes the simulation of a dead-band circuit to avoid cross-conduction of switches and a MOSFET gate driver circuit, both verified using LTspice. Following this, an open-loop buck converter was designed using the TL494 PWM controller, with switching frequency analytically derived and passive components such as inductors and capacitors calculated based on ripple constraints. Hardware realization of the converter was also carried out, and results were captured using a digital storage oscilloscope. Further, a Constant Current Constant Voltage (CCCV) charging strategy was implemented in MATLAB Simulink. This closed-loop system uses PI controllers to regulate both output current and voltage dynamically. The system successfully delivered a regulated current of 90A in CC mode and transitioned seamlessly to CV mode as the battery voltage approached its rated threshold, while monitoring the battery’s state-of-charge (SOC). Simulation and hardware results confirm that the designed system ensures minimal ripple, stable operation, accurate switching transitions, and safe charging behavior, making it suitable for real-world EV charging applications. The overall system providesa strong foundation for further enhancements involving digital control, battery management system integration, and AI-driven predictive charging strategies. Sun, 01 Jun 2025 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17552 2025-06-01T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17546 Title: Development of a versatile battery simulator for testing power electronics systems across multiple battery chemistries Authors: Sarkar, Sandeep Abstract: A Battery Emulator (BE) is a real-time hardware platform designed to replicate the electrical behavior of real batteries, thereby facilitating safe, flexible, and cost-effective testing of power electronic systems. Battery emulators are instrumental in accelerating research and development in domains such as Electric Vehicles (EVs), Battery Management Systems (BMS), and Renewable Energy System (RES) integration, by mitigating the safety risks, variability, and financial constraints associated with physical batteries. This thesis presents the design and implementation of a versatile battery simulator integrated with a bidirectional DC-DC converter. The system is capable of accurately emulating both charging and discharging behaviors across multiple battery chemistries. At its core lies an equivalent circuit-based lithium-ion battery model, selected and validated through rigorous simulation studies conducted in MATLAB/Simulink. The developed emulator is designed for seamless integration into both grid connected and standalone configurations, enabling comprehensive evaluation of battery performance under a wide range of operating scenarios. Simulation and experimental validation confirm that the proposed emulator effectively replicates real battery dynamics, positioning it as a valuable tool for modern energy storage research, system development, and testing. Thu, 29 May 2025 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17546 2025-05-29T00:00:00Z