The invention relates to the technical field of magnetic coupling wireless power transmission, and particularly discloses an anti-offset constant current output wireless charging system for an automatic guided vehicle, which is characterized in that a secondary side compensation inductor Lf2 in an LCC type secondary side compensation network is designed into a Q coil attached to a receiving coil LS; a switch S is designed on a series branch where a secondary side series compensation capacitor CS is located, and a DD coil is designed as a transmitting coil LP, so that when the automatic guided vehicle is about to reach a charging position, a high-frequency inverter outputs low voltage, a secondary side controller disconnects the switch S, the DD coil and a Q coil can be naturally decoupled when being in central symmetry, and the voltage picked by a receiving end is zero, so that the automatic guided vehicle is charged. Therefore, whether the coils are aligned or not can be judged by detecting the output voltage. According to the system, the current flowing through the load RL is detected in real time, the reference current ILref serves as a reference, the phase shift angle acting on the high-frequency inverter is adjusted through PI control, the current of the load RL is made to be constant at the reference current ILref, and constant output current is achieved.
本发明涉及磁耦合无线电能传输技术领域,具体公开了一种用于自动引导车的抗偏移恒流输出无线充电系统,该系统通过将LCC型的副边补偿网络中的副边补偿电感Lf2设计为与接收线圈LS贴合的Q线圈,并在副边串联补偿电容CS所在串联支路上设计开关S,以及设计发射线圈LP采用DD线圈,从而在自动引导车即将到达充电位置时,高频逆变器以输出低电压,副边控制器断开开关S,由于DD线圈与Q线圈在中心对称时会自然解耦,接收端拾取到的电压为零,从而通过检测输出电压即可判断线圈是否对齐。本系统通过实时检测流过负载RL的电流,以参考电流ILref为参照,通过PI控制调节作用于高频逆变器的相移角,使得负载RL的电流恒定在参考电流ILref,实现输出电流恒定。
Anti-offset constant current output wireless charging system for automated guided vehicle
一种用于自动引导车的抗偏移恒流输出无线充电系统
2023-03-28
Patent
Electronic Resource
Chinese
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