Table 1 Parameters of improved three-coil wireless power link system

Materials

Copper pipe

Silver-plating copper wire

Conductivity (10⁷ S/m)

5.56~6

6.06

Number of turns

4.25

4

Radius of wire (mm)

3

2.5

Radius of the coil(cm)

30

10

Conductor spacing (cm)

6 ± 2.5

–

DC resistance (Ω)

0.046

0.002

Resonant frequency(MHz)

10.1–14.5

–

Quality factor

1000~1500

–