双通道无线电能传输系统全向抗偏移磁耦合器OA

To achieve the power sharing and improve misalignment tolerance of dual-channel wireless power transfer(WPT)systems,a dual-channel magnetic coupler is proposed based on the traditional double-layer quadrature double-D coil structure.This coupler exhibits excellent misalignment tolerance,namely tolerance for misalignment in any direction within the plane composed of X and Y axis.Its transmitting and receiving sides respectively include two decoupled coils,and mutual inductance between the two pairs of coils is symmetry within a certain misalignment range,which can achieve the power sharing of dual-channel WPT systems.Firstly,for dual-channel WPT systems using resonant compensation,detuned compensation and hybrid topology,the common requirements of magnetic couplers are discussed.Then,a design method for the proposed magnetic coupler is given and a case design is carried out.Furthermore,the conformity of the designed case with various performance indicators is analyzed by finite element simulation.Finally,a magnetic coupler prototype is developed for experimental verification.The results show that,within 100 mm misalignment in X and Y axis direction except for the extreme misalignment position,the magnetic coupler efficiency remains above 91.12%and the ratio of channel output power is greater than 0.87,demonstrating a good power sharing effect.