矿用非对称磁耦合谐振无线电能传输关键技术研究

磁耦合谐振式无线电能传输（MCR-WPT）是目前主流的无线电能传输技术，地面已经被广泛应用，但目前MCR-WPT在煤矿井下尚无成功应用，主要瓶颈是：电气防爆、金属外壳对近场谐振电磁波的屏蔽和矿用MCR-WPT线圈的非对称要求等。MCR-WPT依靠线圈间电磁波谐振耦合来实现能量传递，传输功率越大，需要谐振电路的储能元件容量越高，达到本质安全型要求的难度越大，而如果是隔爆型，却又面临着金属外壳对近场谐振电磁波的屏蔽问题。针对存在的问题，本项目研究矿用MCR-WPT等效电路储能和放电；研究利用低频谐振环磁负电磁超材料介质板透窗对线圈间谐振耦合场的增强；井下电气设备形状体积差异大，研究非对称导致MCR-WPT出现频率分裂和传输效率急剧下降的原因和弥补措施；为了评估和降低大功率矿用MCR-WPT对巷道中矿工的电磁辐射和其他弱电系统的电磁干扰，研究隔爆外壳对大功率矿用MCR-WPT泄露电磁辐射的屏蔽。

Magnetic coupled resonant wireless power transfer (MCR-WPT) is the mainstream wireless power transfer technology which has been widely applied on the ground, but it has not been applied in coal mine at present. The main technical bottlenecks of the application are electric explosion protection, shielding near field resonance electromagnetic wave with metal shell and asymmetrical requirements of coils applied in coal mine. The MCR-WPT realizes energy transmission relied on electromagnetic wave resonance coupling between coils. The capacity of energy storage elements increase with the increase of the power, and it is more difficult to meet the requirements of intrinsic safety in coal mine. If it is flameproof equipment, there will be shielding problem of metal shell to near field resonance electromagnetic wave. The project will study the energy charge and discharge for MCR-WPT in coal mine. And the enhancement of resonance coupling field is studied by the plate focusing effect of low frequency resonant ring magnetonegative electromagnetic metamaterials. The shape and volume of underground electrical equipment are quite different, and the reasons of frequency splitting and sharply decline of transmission efficiency caused by asymmetry is studied and corresponding remedy measures are proposed. The shielding problem of metal shell on near field resonance electromagnetic wave is analyzed to evaluate and reduce the electromagnetic radiation to the miners and electromagnetic interference to other weak current systems.