| PhD Seminar

Name of the Speaker: Mr. Kamma V V Nagesh Kumar (EE20D033)
Guide: Prof. Srirama Srinivas
Online meeting link: https://meet.google.com/jrt-xzjv-exc
Date/Time: 30th January 2025 (Thursday), 12:00 PM
Title: Novel Technologies for EV Battery Charging Infrastructure Development

Abstract :

The rapid adoption of electric vehicles (EVs) in India is supported by government initiatives, including developing wayside EV charging infrastructure. Off-board chargers, typically comprised of an active front-end converter followed by a DC-DC conversion stage, face increasing demands for high power to enable faster charging. Interleaved DC-DC converters are ideal for such applications due to their ripple cancellation, bidirectional power flow, and simple control. The first part of the talk dwells on an interleaved DC-DC converter and presents a novel control algorithm that broadly meets the output voltage requirements. The envisaged algorithm manages to reduce the output ripple and thereby contributes towards reducing the filter inductance requirement by 50% without the need for bulky hardware, and this further contributes to improving the overall system efficiency. Keeping the CC-CV charging modes of EV batteries in mind, dynamic interleaving and converter reconfiguration are also undertaken to enhance performance under varying load conditions.

The second part of the talk presents a non-invasive, universal vehicle-to-vehicle (V2V) power transfer that provides a viable solution for emergency charging for EVs, especially under rescue conditions and/or when areas lack grid connectivity. The proposed charging method thoughtfully utilizes the control pilot (CP) signal to accomplish controlled power transfer without the need of modifying the existing power circuits. This approach is easily compatible with various onboard charger topologies, different power ratings, and battery capacities.

Detailed simulation and experimental results will be discussed that validate the effectiveness of the proposed methods and highlight their superiority compared to the current state-of-art.