Low-frequency penetrating-type power transmission device

The invention relates to wireless power transmission, in particular to a low-frequency penetrating-type power transmission device which is capable of penetrating through metal media to transmit electric power wirelessly. Mobile phone wireless charging is one of the popular application technologies currently, while a traditional product for wireless charging is incapable of being used for wireless charging of mobile phones with metal back shells due to the fact that the area of the alternating magnetic field projected by a power transmitting coil of the product is large and frequency is high. The low-frequency penetrating-type power transmission device is not only capable of meeting requirements for wireless charging of the mobile phones with metal back shells, but also suitable for being widely used in other application projects in which driving electric power needs to be transmitted in a wireless sensing mode by penetrating through a metal device or a metal part.