Design and Implementation of a High‐Efficiency Multi‐Receiver WPT System With Soft‐Switching

In logistics sorting systems, conventional conductor rail supply suffers from wear, high maintenance, and low reliability due to brush‐rail contact, hindering efficient continuous power delivery. Wireless power transfer (WPT), with its contactless, reliable, and low‐maintenance nature, provides an effective solution for dynamic power supply in sorting systems. However, WPT still faces dual challenges in practical applications: unstable power delivery under high‐power output conditions and low transmission efficiency in multi‐receiver scenarios, both of which hinder its ability to provide efficient and reliable power. Therefore, this paper designs and implements a WPT system with parallel multi‐receiver power delivery to meet the high‐power demands of logistics sorting applications. A circuit model of the system is established, and key factors affecting efficiency are analyzed and optimized. Subsequently, theoretical conditions for achieving soft switching in the inverter are derived, and a phase‐shifted soft switching strategy is proposed to improve system efficiency. Finally, an experimental platform for multi‐receiver WPT is developed. Experimental results demonstrate that under a 1.2‐kW output condition, soft switching of the inverter is successfully achieved, and the overall system efficiency reaches 91.9%.