Effect of the Receiver Coil Rotational Motion on Induction Voltage of Wireless Power Charging

Abstract

Wireless power charging has been extensively deployed in charging the battery and devices, but the performance of transmission is limited by transmission factors, and some complex applications influence the magnetic coupling between transmitter and receiver coils. In this paper, an experimental is designed to investigate the effect of the receiver coil rotational motion on induction voltage of wireless power charging. The application of wireless power transmission continuously charges a tire pressure sensor battery is considered as a case-study. In order to charge the battery of tire pressure sensor, a prototype wireless power charging was designed and validated. Based on the prototype, the receiver module of wireless power charging was put on the small rotating wheel, and various of rotational speed was applied to know the effect of rotational motion on its induction voltage. The result experiments show that linear increase of receiver coil rotational speed gives linear increase to the induction voltage of receiver coil, and thus it gives effect both current and power load too. In this work, increasing of speed (every 200-rpm) of receiver coil rotational motion raises the linear increase of induction voltage about 8%.