A Simultaneous Wireless Power and Data Transfer Method Utilizing a Novel Coupler Design for Rotary Steerable Systems

This paper introduces a simultaneous wireless power and data transfer (SWPDT) method by using a halfcylinder-stator and quarter-cylinder-rotator coupling mechanism for rotary steerable systems (RSSs). Through this configuration, stability and synchronization of both power and data transfers are ensured, notably under comprehensive 360° rotational conditions. Moreover, based on the decoupling characteristics, the interference between power and data transfer is also greatly reduced. A prototype is built, which illustrates that the proposed structure possesses the constant voltage (CV) output and stable data transfer capability. Furthermore, observations indicate that the output voltage can be maintained as stable at 48 V with a deviation of ±2.7%. And there is no detectable significant change in data transfer voltage amplitude. During the full 360° rotation, the system DC-DC efficiency range is from 86.7% to 88.9%