Distance and efficiency is the development bottleneck of wireless energy transfer system. Resonant coupling technology can solve this problem effectively. From the circuit mode of receiving and emission coil, it was found that detune is the key reason of low efficiency based on the deep studying of resonant coupling system. And then, a wireless pave fransfer system was desinged, which the rated transmission power is 30 W and the transmission frequency is 1 MHz. Also, frequency - tracking technology was used in the emission coil to reduce power loss when detuning. Lastly, experiment validates this design and it has a good coherence with the theory calculations.%距离和效率是电能无线传输技术发展的瓶颈,电磁场的谐振耦合技术能够有效的解决这一问题.从谐振耦合的收发线圈电路模型出发,对谐振耦合电能无线传输系统进行了深入研究,发现失谐是系统效率不高的主要原因.进而,设计了一个功率为30W,频率为1 MHz的小功率电能无线传输系统,并且通过对发射线圈的电流检测实现发射源对发射线圈频率的时时跟踪,减少了发射线圈失谐对效率的影响,从而提高了电能无线传输的效率.最后通过30 W的原理样机验证了此系统的有效性.
展开▼
