AGV无线充电全波同步整流尖峰电压抑制方法

Suppression Method of Spike Voltage of AGV Wireless Charging by Full-wave Synchronous Rectification

自动导引运输车(AGV)电池组的无线充电要求是低压大电流,全波同步整流(FWSR)可以提高效率并降低成本。首先详细介绍了AGV无线充电拓扑和工作原理,其次针对实验过程发现的同步整流管电压尖峰问题,进行了理论建模和过程原因分析,并提出了有效的抑制措施和吸收电路设计,最后设计了一台样机,通过实验验证了方案的有效性。实验结果表明,该系统实现了3 kW的运行功率,效率可达91%以上,采用同步整流有效提高了系统功率密度。

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.