Figures (12)  Tables (1)

    • Figure 1. 

      Structure of inhomogeneous winding for loosely coupled transformers.

    • Figure 2. 

      Internal magnetic field. (a) Homogeneous winding. (b) Inhomogeneous winding.

    • Figure 3. 

      Typical wireless power transfer system.

    • Figure 4. 

      Flux distribution of the solenoid structure.

    • Figure 5. 

      Equivalent magnetic reluctance network.

    • Figure 6. 

      Lumped magnetic reluctance model.

    • Figure 7. 

      Magnetic field distributions in core with different winding parameters. (a) Homogeneous winding (9 : 9 : 9 : 9 : 9). (b) Winding parameters (10 : 10 : 5 : 10 : 10). (c) Winding parameters (17 : 4 : 3 : 4 : 17).

    • Figure 8. 

      Variation of core loss and coupling coefficient with different winding parameters.

    • Figure 9. 

      Experimental setup for wireless power transfer under inhomogeneous winding.

    • Figure 10. 

      The diagram of the setups for measuring.

    • Figure 11. 

      Test waveforms of the system.

    • Figure 12. 

      Variation of core loss with different winding parameters.

    • Winding parameters Theoretical loss (W) Simulation loss (W)
      (9: 9: 9: 9: 9) 16.05 16.08
      (10: 10: 5: 10: 10) 15.55 15.58
      (17: 4: 3: 4: 17) 15.10 15.12

      Table 1. 

      Comparison of core loss in theoretical and simulation results.