Abstract: A novel three-phase soft-switching inverter circuit topology is proposed , which is composed of a full-bridge phase-shifted control circuit and an AC/AC inverter. Based on a detailed analysis of the control method and working process of the AC/AC inverter circuit, a prototype was fabricated, and experimental results verified the feasibility of the circuit topology and the correctness of the theoretical analysis. Keywords : switch; phase shift; control; inverter The control method and working process of AC/AC inverter are analyzed in detail, a prototype unit is done on the basis of the above discussion, the experimental results show that the circuit topology is feasible and the theoretical analysis is right． Keywords : switching; phase-shifted; control; inverter Foundation Project: Supported by the National Science Foundation of Shaanxi Province (No. 2004E214) and the Educational Special Foundation of Shaanxi Province (No. 04JK19811) 1 Introduction Since Professor Divan proposed the resonant DC-link inverter circuit topology, active clamp resonant DC-link inverters, parallel resonant DC-link inverters, and quasi-parallel resonant DC-link inverters have emerged. These are all designed to address problems such as high switching voltage stress and large resonant inductor losses. However, each of these circuits still has its own shortcomings. Subsequently, resonant pole inverters, auxiliary diode resonant pole inverters, and auxiliary resonant pole inverters appeared. These are equipped with an auxiliary resonant circuit on each arm of the three-phase bridge. This causes the voltage at each phase pole to resonate, thereby creating a zero-voltage turn-on condition for the switching devices. Their disadvantages are relatively complex control and certain limitations on soft-witching conditions. This paper proposes a novel three-phase soft-switching inverter circuit topology. Instead of using resonant/quasi-resonant circuits to generate voltage/current zero-crossing points, this circuit utilizes a full-bridge phase-shift control circuit to periodically output zero-voltage grooves, creating zero-voltage switching (ZVS) conditions for the switching devices in the AC-AC converter circuit. [b][align=center]For more details, please click: Research on a Novel Three-Phase Soft-Switching Inverter Circuit[/align][/b]