Experimental installation of wireless power transfer system based on the series resonance technology

Abstract

<span lang="EN-US">In this work, we aim to install a wireless power transfer (WPT) system experimentally. Series resonance technology was used to achieve zero-voltage switching (ZVS). We investigated the impact of the primary and secondary resonance frequencies (f<sub>p</sub> and f<sub>d</sub>), and inverter frequency switching (fch) on the efficiency (β) and maximum transfer power in a WPT system based on the inductive wireless power transfer (IWPT) technology. An ultrasonic device was utilized as a generator to excite the coil at the primary side. The experimental outcomes showed that there is an optimum unlike f<sub>p</sub> and f<sub>d</sub> can be got to match fch. It was found also that there is a trade-off between the power supplied to the load (PRL) and DC-DC efficiency (β). At an air-gap of 5 cm, the obtained results are recorded as follows; the peak recorded system β is 62% that was obtained at f<sub>p</sub>=19 kHz, f<sub>d</sub>=f<sub>ch</sub>=24 kHz that is corresponding to 101.88W of PRL; whereas the highest PRL resulted i.e. 244W when f<sub>p</sub>=19 kHz, f<sub>d</sub> =24 kHz, f<sub>ch</sub>=21 kHz at 61% of β; in such case, the maximum β* PRL multiplication was achieved i.e. 149. Moreover, the coils’ misalignment was studied. The outcomes showed that the lateral misalignment has worst effect on the PRL and β than the air-gap. The experimental results were validated with simulation ones.</span>