Analysis of mutual inductance between non-coaxial rectangular coils with rectangular cross-section

摘要

Magnetic coupling resonance wireless power transmission is a new technology to realize the wireless transmission of energy by means of high frequency coupling resonance between the coils. The variation of the coupling coil size and the relative position will change the mutual inductance between the windings, which will finally affect the characteristics of the infinite power transmission system. Using rectangular coil with rectangular cross-section as the analysis object, to research the calculation method of mutual inductance between non-coaxial rectangular coils, by subdividing and summation method to deduce the theory formula of the mutual inductance, to support wireless power transmission which consists of rectangular coils. In all cases, the formula programming calculation, the FEM software simulation and the experimental measurement results are consistent, which proves the correctness of the calculation method.