Authors:
P. Srinivasan, K. Arulvendhan

Addresses:
Department of Electrical and Electronics Engineering, Saveetha Engineering College, Chennai, Tamil Nadu, India. Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Ramapuram, Chennai, Tamil Nadu, India.

Abstract:

Wireless Power Transfer Systems (WPTSs) have gained significant attention as an efficient and convenient method for charging electric vehicles (EVs). A major challenge in WPTSs is improving transfer efficiency while maintaining stable voltage and current regulation. Conventional impedance-matching control can enhance system efficiency but often requires additional DC–DC converters or results in hard switching, which increases power losses. To overcome these limitations, this work investigates a bidirectional dynamic wireless charging system for EVs operating under Zero Voltage Switching (ZVS) conditions. The proposed system employs a converter to generate high-frequency AC for wireless transmission. A feedback loop incorporating voltage and current signals is processed through a PI controller to generate optimised gating pulses for both primary and secondary converters, ensuring ZVS operation. The receiving side delivers power to a 48 V lead-acid battery, with charging and discharging characteristics that demonstrate bidirectional energy flow between the grid and the vehicle. Simulation results demonstrate the system's ability to operate in both Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) modes. Furthermore, a comparative evaluation of instantaneous efficiency with and without ZVS confirms the reduction in switching losses and the enhancement of overall system performance. 

Keywords: Wireless Power Transfer; Inductive Coupling; Zero Voltage Switching; Electric Vehicle; System Performance; Voltage and Current Regulation; Dynamic Wireless Charging.

Received on: 04/05/2024, Revised on: 22/07/2024, Accepted on: 30/10/2024, Published on: 03/06/2025

DOI: 10.69888/FTSASS.2025.000530

FMDB Transactions on Sustainable Applied Sciences, 2025 Vol. 2 No. 1, Pages: 22-33

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