BWCA-Based Dual-Side LCC Compensation Network with Optimized Switching Control Subsystem for High-Efficiency Narrow-Band Dynamic Tuning

Abstract

Wireless Power Transfer (WPT) has emerged as a promising non-contact charging solution for Electric Vehicles (EVs), offering high safety, convenience, and efficiency. In such systems, the dual-sided LCC compensation network plays a critical role in achieving high power transfer efficiency. However, the performance of inductive power transfer systems is highly sensitive to switching frequency, and conventional LCC designs rely on fixed passive components, making real-time resonance tuning under varying operating conditions difficult. To address this limitation, this paper proposes a novel dynamic tuning strategy by replacing fixed capacitors with Binary Weighted Capacitor Arrays (BWCA) in both the primary and secondary LCC networks. This configuration enables precise, real-time resonance control in response to frequency deviations. MATLAB simulations show that the proposed dual-side LCC network with binary capacitor tuning reaches over 90% efficiency at 12 kW output and 85 kHz operating frequency. When the frequency changes between 81.38 kHz and 90.00 kHz, the system still keeps efficiency above 90% with very little power change, proving strong real-time resonance control.