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In electric vehicle wireless power transfer (EVWPT) systems, unipolar, bipolar, and multipolar coils produced by different manufacturers are not well compatible with each other, resulting in the interoperability issues. In order to solve this contradiction, a family of self-adaptive interoperable receivers based on multiple decoupled receiving poles is proposed. Based on the two decoupled poles as the receiving coil, the proposed self-adaptive two-pole interoperable receiver can tolerate both the unipolar (UP) transmitting coil and the bipolar (BP) transmitting coil along one direction. On this basis, it is extended to a self-adaptive four-pole interoperable receiver. The four poles are coplanar and decoupled by using four externally decoupling windings. This self-adaptive four-pole receiver can tolerate the UP transmitting coil, the BP transmitting coil along two directions, and the quadrupole (QP) transmitting coil by forming effective equivalent mutual inductances with them, thus achieving interoperability. Moreover, misalignment tolerance is also realized. The experimental results of the two-pole and four-pole proposals show that efficient power transmission can be achieved with various transmitting coil including the UP, BP, and QP transmitting coils, realizing interoperability and misalignment tolerance.
Zhang et al. (Fri,) studied this question.