Abstract: The requirements for wireless charging of automated guided vehicle（AGV）batteries are low voltage

and high current，full-wave-synchronous-rectification（FWSR）can improve efficiency and reduce costs. Firstly，AGV wireless charging topology and working principle were introduced in detail. Secondly，aiming at the problem of voltage spike of synchronous rectifier tube found in the experimental process，theoretical modeling and process cause analysis were carried out，and the effective suppression measures and absorption circuit design were proposed. Finally，a prototype was designed to verify the effectiveness of the scheme through experiments. Experimental results show that the system achieves 3 kW operating power，and the efficiency can reach more than 91%，meanwhile，the power density of the system is remarkably improved by synchronous rectifier.

      Key words: inductive coupling wireless charging；full-wave-synchronous-rectification（FWSR）；resonance；

leakage inductance