Frequency Selection to Achieve CV/CC Output for Single-Wire Power Transfer Systems

Recently, the single-wire power transfer (SWPT) technology has attracted increasing attentions. In this brief, a simplified T-type circuit of SWPT system has been derived. With this, its unique characteristic has been found to achieve the load-independent constant voltage/constant current output solely through frequency selection, in which no additional hardware circuits and complex control methods are required. Furthermore, the zero-phase-angle input can be achieved in constant current output mode. Finally, an outdoor experimental platform of SWPT system with a transmission distance of 70m has been established to verify the effectiveness of proposed method.