International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 11 | Nov 2025
p-ISSN: 2395-0072
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Electric Vehicles Fast Charging System by Using DAB Converter Mrs. Manasa B1, Nitin Satish Kodiya2, Vignesh P3, Nagendra M4, Gowtham M5. 1Assistant Professor Department of Electrical and Electronics Engineering
PES Institute of Technology and Management, Shivamogga, Karnataka, India , Department of Electrical and Electronics Engineering PES Institute of Technology and Management, Shivamogga, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------requirements of next- generation fast charging systems. The Abstract - The EV has proposed an ambitious goal to achieve 2,3,4,5BE Final Year Students
DAB converter comprises two full-bridge circuits, connected via a high-frequency transformer, which provides both galvanic isolation and efficient power transfer between two DC sources. Thanks to this structure, the flow of power is not limited to one direction only, thus grid-to-vehicle (G2V) and vehicle to-grid (V2G) operations are feasible. Bidirectional operation, in fact, besides being an enabler of fast EV battery charging, also allows the stored energy in the vehicle to be drawn back to the grid contributing it to grid stability and energy optimization. The rapid advancement of bandgap semiconductor devices, such as Gallium Nitride (GaN) and Silicon Carbide (SiC), has resulted in enhanced switching efficiencies and thermal performance of the DAB converters. These developments have enabled the design of smaller, faster, and more energy- efficient converters, while still be dependable. Consequently, the DAB fast charger solution is engaging in discussions regarding the assimilation of renewable charging stations into the smart grid. In essence, a Dual Active Bridge converter is a high efficiency system to enable fast charging of EV that takes ad- vantage of compactness, high power density, and bidirectional charging capabilities. The factors of adaptability, isolation, and better control feature make it a fundamental element for future intelligent charging infrastructures, which are in line with the concept of clean, efficient and sustainable electric mobility.
widespread E-mobilitv in both electrical and commercial sectors. For this, thousands of DC fast-charging stations need to be deployed. Inese power converters installed in the Dure are not like conventional DC-DC converters, as they have high power density in the range of tens of kilowatts. Unlike conventional non-isolated power converters, isolated power converters can provide ideal galvanic isolation, which protects both the local power grid and electric vehicles. Among the DC power converters designed for industrial applications, LLC resonant converters and DAB converters (Dual Active Bridge) are well appreciated. Based on these advantages, a 10kW bidirectional DAB power converter has been designed to meet the demands of this thesis project. The thesis has been divided into four clear sections. The first part is devoted to the literature study. The literature review explores the challenges existing in the current electrical field. Different types of DC-DC topologies are compared based on various elements such as component analysis, controllability, safety consideration, and cost effectiveness. Based on the examination of these aspects, the potential solutions for Electric Vehicles (EVs) are identified. In the second part, one particular type of DC-DC converter of a specific power rating of 10kW is selected using the DAB (Dual Active Bridge) topology. The selection would be based on the analysis in the literature review. These topics are explored and discussed within the literature study.
Key Words: Dual Active Bridge Converter, MOSFET's
2. SYSTEM ARCHITECTURE AND DESIGN
with Gate Drive IC's, High Frequency Transformer, Voltage Sensor, Temperature Sensor, Arduino Uno microcontroller, Step-down Transformer, Heat Sink.
A. Overall System Configuration The Dual Active Bridge converter architecture. structured to provide bidirectional and isolated DC-DC power conversion, which is essential to modern EV fast charging applications. The system consists of two active full-bridge stages:
1. INTRODUCTION As the transition to sustainable transport is speeding up, electric vehicles (EVs) are considered the most viable option to replace fossil fuel-based mobility. However, one of the main reasons limiting the large scale EVs adoption is the situation of fast and efficient charging systems. Conventional charging converters are normally large in size, have limited efficiency, and power flow in one direction only, which makes them inappropriate for high-performance applications. In order to eliminate such drawbacks, the Dual Active Bridge (DAB) converter has been identified as a high efficiency, bidirectional DC-DC converter that can satisfy the
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