The principle of the electric charge of the electric toothbrush is the law of electromagnetic induction, that is, the magnetic field around the current. The basic principle of wireless transmission, the current into alternating source transmitting coil around the coil induced periodic change in the magnetic field, and then accept the periodic change of the induced electric field in the coil, forming the current (voltage).
A similar principle is applied in electromagnetic oven, electromagnetic coil furnace is transmitting coil and receiving coil is your metal pot, but the metal ring current (Wo Liu) is directly converted into heat.
However, there are many problems such as low transmission loss and low conversion efficiency. The reality of the wireless transmission module, in general, the most commonly used is the induction cooker, and other mobile phone transmission and the like. Now need to add wireless charging magnetic products magnetic. Increase the efficiency of wireless charging, and reduce the heat charge, the charging efficiency is generally between 75%-80%. For wireless charging technology is now more and more mature, but more and more domestic fire.
