A Dual-Side Magnetic Integration–Based Receiver Detection Method of Long-Track DWPT System

Abstract

Position detection of the energy pickup receiver (Rx) in long-track dynamic wireless power transfer (DWPT), including longitude misalignment and motion trace, is essential for practical applications. This paper presents a dual-side magnetic integration-based Rx position detection (RPD) method, which utilizes integrated inductor coils of the LCC-LCC compensated DWPT topology to achieve cost-effective Rx detection without extra sensors or energizing circuits. Solenoid and bipolar integrated coils are respectively designed in the transmitter (Tx) and Rx sides to realize Rx detection without affecting WPT performance. Key parameters of the integrated coils are optimized for accurate Rx positioning. The Rx detection strategy is then developed based on two mapping indicators, holding the merits of dual-objective Rx detection capabilities and simplified positioning procedure. A scaled-down long-track DWPT experimental prototype is established to demonstrates the effectiveness and feasibility of the proposed RPD method under dynamic operation or malfunction conditions. The experimental results show that the reasonable sampling interval can mitigate the positioning error caused by the vehicle's velocity.