Application of Magnetic Coupling Resonant Wireless Power Supply in a Torque Online Telemetering System of a Rolling Mill

Figure 6

Variation of η with f and D. (a) Coil diameter of 200 mm. (b) Coil diameter of 400 mm. (c) Coil diameter of 700 mm. (d) Coil diameter of 900 mm.

(a)

(b)

(c)

(d)