Investigating the Effect of Horizontal Displacement between Transmitter and Receiver Coils on the Efficiency of Resonant Inductive Wireless Power Transfer

This investigation explores how horizontal misalignment between transmitter and receiver coils influences the efficiency of resonant inductive wireless power transfer. The research aims to quantify the relationship between coil displacement and power transmission effectiveness.

Using a custom-built Hartley oscillator and an LC receiver circuit, the researcher measured efficiency by varying horizontal displacement from 0 to 0.12m. Data was collected through RMS voltage and current measurements using a digital oscilloscope and ammeter.

The results demonstrate an inverse quadratic relationship, where efficiency decreases significantly as displacement increases. The paper is distinguished by rigorous uncertainty propagation for power and efficiency calculations, and a detailed evaluation of systematic errors related to MOSFET thermal effects and non-sinusoidal waveforms.