Resonant and non-resonant inductive power transfer systems based on planar spiral coils

This study discusses the characteristics of the resonant and non-resonant inductive power transfer (IPT) systems based on planar spiral coils. The transfer function and frequency response of the resonant and non-resonant IPT systems are derived. The experimental results under varied air gap, load, and input voltage are presented to validate the performances of the resonant and non-resonant IPT systems. Compared with the resonant IPT systems, the non-resonant IPT system exhibits constant output voltage regardless varied load and switching frequency.