Figures (12)  Tables (3)

    • Figure 1. 

      (a) Equivalent circuit of IPT system with double-sided SR LCC coils. (b) Main coil. (c) Compensation coil. (d) Parallel capacitor.

    • Figure 2. 

      The SR LCC coil structure. (a) Top view. (b) Bottom view.

    • Figure 3. 

      IPT system with double-sided self-resonant LCC coils after decoupling.

    • Figure 4. 

      Field distribution of the coils. (a) Magnetic field distribution. (b) Electric field distribution.

    • Figure 5. 

      The variation curve of K1S/KPS. (a) $ {d}_{v} $ changes. (b) $ {d}_{l} $ changes at a fixed $ {d}_{v} $ of 35 mm.

    • Figure 6. 

      The variation curve of K1S/KPS with changes in dv when (a) dLBin changes; (b) dLCin changes; and (c) dLBout changes.

    • Figure 7. 

      The variation curve of K1S/KPS with changes in dl at a fixed dv of 35 mm when (a) dLBin changes; (b) dLAin changes; and (c) dLBout changes.

    • Figure 8. 

      Fabricated coils. (a) Top view of the LCC SR coil. (b) Bottom view of the LCC SR coil.

    • Figure 9. 

      Experimental setups of the double sided SR LCC coils.

    • Figure 10. 

      AC-AC experimental setup of the SR coil IPT system with LCC-LCC compensation characteristics.

    • Figure 11. 

      Measured waveforms on the oscilloscope of the proposed IPT system with an AC load of 50 Ω.

    • Figure 12. 

      (a) $ \Delta \theta $ with changes in $ {d}_{v} $. (b) $ \Delta \theta $ with changes in $ {d}_{l} $ at a fixed $ {d}_{v} $ of 35 mm. (c) Transmission efficiency and output current with respect to the different $ {R}_{L} $.

    • Parameter Simulated value Measured value
      Main inductor LP, LS 4.52 μH 4.46 μH
      Series inductor L1, L2 0.765 μH 0.74 μH
      Parallel capacitor C1, C2 155.42 pF 159.6 pF
      Series capacitor CP, CS 37.9 pF 40.4 pF
      Primary coupling coefficient KPS 0.186 N/A
      Intra-side coupling coefficient K1P, K2S −0.08 N/A
      Cross-coupling coefficient K1S, K2P −0.036 N/A
      Minor coupling coefficient K12 0.018 N/A

      Table 1. 

      Equivalent circuit parameters of double-sided LCC SR coil IPT system.

    • Dimensional parameter Description Value
      dLAin Inner diameter of LA 71 mm
      dLAout Outer diameter of LA 100 mm
      NLA Turn numbers of LA 5
      wLA Winding width of LA 0.83 mm
      sLA Winding space of LA 1.52 mm
      dCAin Inner diameter of CA 33 mm
      dCAout Outer diameter of CA 67 mm
      wCA1 Inner width of each tooth of CA 2.22 mm
      wCA2 Outer width of each tooth of CA 3.8 mm
      dLBin Inner diameter of LB 6.525 mm
      dLBout Outer diameter of LB 28 mm
      NLB Turn numbers of LB 7
      wLB Winding width of LB 0.85 mm
      sLB Winding space of LB 1.45 mm

      Table 2. 

      Dimensional parameters of coils.

    • Structural components Loss (Ω) Q
      LCC SR main coil LA 1.8 214
      Compensation coil LB 0.4 163
      Parallel capacitor CA 0.2 377.6

      Table 3. 

      Optimized Q and associated losses of double-sided LCC SR coil IPT system.