Research and Implementation of a Low Power Bendable WPT System

Horizontal and angular misalignment of coils in WPT systems have been extensively discussed. But as more and more low-power WPT systems are applied to wearable devices, the requirement for physical flexibility is also increasing. Different from conventional WPT coils with rigid and flat structure, bendable coupling coil structure is obviously more attractive, which however brings a new misalignment situation: the bending misalignment. In this paper, a low-power bendable WPT system is designed and the influence of different bending angles on self-inductance and mutual inductance is simulated and analyzed. The bending resistance of three types of coil and different core thicknesses are compared, and a low-power bendable experimental platform was finally constructed.