S-S拓扑结构下大负载AGV无线电能传输系统设计

Design of Wireless Power Transmission System for Large-Load AGV under S-S Topology

为优化AGV充电模式,设计一种无线电能传输系统,用于户外大负载AGV小车的无线充电。该无线电能传输系统包含AC/DC功率模块、高频逆变模块以及接收端整流模块,其中AC/DC功率模块采用华为R95021G1功率模块,输出低压模式可实现正常系统拓扑参数下10 kW输出,输出高压模式可实现高压低流输出状态;高频逆变模块将直流输入变换为高频交流输出,输出接线至地面端线圈拓扑;接收端整流模块将接收线圈的交流电压整流为直流输出,以供给直流负载或为电池负载充电。与逆变电源WiFi通信,实现输出参数的闭环调节和实施状态上报。选择磁耦合全桥S-S无线电能传输技术,采用频率跟踪算法实时调节PWM占空比和PFC模块输出电压来控制充电功率,最终实现AGV的无线快速充电,定位准确、无接触式火花、系统运行稳定。

In order to optimize the AGV charging mode,a wireless power transmission system was designed for wireless charging of outdoor large-load AGV trolleys.The wireless power transmission system included three modules:AC/DC power module,high-frequency inverter module and receiver rectifier module.In the AC/DC power module,Huawei R95021G1 power module was adopted,and the output low-voltage mode could achieve 10 kW output under normal system topology parameters,the output high-voltage mode could realize high-voltage and low-current output state.By the high-frequency inverter module,the DC input was converted into high-frequency AC output,and the output was wired to the ground-side coil topology;by the receiving-end rectifier module,the AC voltage of the receiving coil was rectified to DC output to supply DC loads or charge battery loads.It communicated with the inverter power supply through WiFi to realize the closed-loop adjustment of output parameters and report the implementation status.In this design,the magnetic coupling full-bridge S-S wireless power transmission technology was selected,and the frequency tracking algorithm was used to adjust the PWM duty cycle and the output voltage of the PFC module in real time to control the charging power.Finally the wireless fast charging of the AGV is realized,with accurate positioning and non-contact sparks.The system runs stably.