A Communication-Free PQ-Based Control Strategy for 7.7 kW Bidirectional ‎‎Wireless EV Chargers

Abdelmoumin Hamrani; Abdelhalim Tlemçani; Said Barkat

doi:10.5935/jetia.v12i58.3158

Abdelmoumin Hamrani Laboratory of Advanced Electronic Systems (LSEA), University of Medea, Medea, Algeria. https://orcid.org/0000-0003-4631-3160
Abdelhalim Tlemçani Electrical Engineering and Automation Research Laboratory (LREA), University of Medea, Medea, Algeria. https://orcid.org/0000-0002-4385-671X
Said Barkat Electrical Engineering Laboratory, Faculty of Technology, University of M’sila, M’sila, Algeria. https://orcid.org/0000-0002-6220-7387

DOI: https://doi.org/10.5935/jetia.v12i58.3158

Abstract

The widespread deployment of electric vehicles (EVs) has significantly heightened the need for more efficient and intelligent charging technologies. Bidirectional wireless power transfer (BD-WPT) systems enable both grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operation, supporting applications such as renewable energy integration, demand peak mitigation, and system frequency stabilization. However, existing control strategies face challenges related to synchronization, communication delays, and robustness under detuning and misalignment. This paper investigates a PQ-based synchronization control technique for a 7.7 kW series–series compensated BD-WPT charger, designed in compliance with SAE J2954 standards. The adopted method relies solely on local measurements of active (P) and reactive (Q) power, eliminating the need for communication links while achieving decoupled control of power direction and magnitude. A voltage-controlled oscillator (VCO) ensures robust phase synchronization between the inverter and rectifier. Simulation results demonstrate that the PQ-based control achieves accurate bidirectional power transfer, seamless G2V/V2G transitions, effective power regulation, and resilience against detuning and coil misalignment. These findings underscore the promise of PQ-based synchronization in improving the efficiency, reliability, and scalability of BD-WPT systems for future smart grid integration.