A test platform was built to investigate the impact of magnetic shielding pieces made from ferrite on the electromagnetic induction type wireless charging system in different combination modes with the coils. The values of coupling coefficient(k) from 0. 77 to 0. 30 while the coil distances(h) increased from 1. 0 mm to 9. 2 mm under the mode without magnetic shielding piece. It was found that the magnetic shielding piece attached to the transmitter could significantly improve the value of k,because the magn...