Fig. 1:
Wireless power transfer of LVAD.
Fig 2.:
Block diagram of the WPT system.
Fig. 3:
Block diagram of the proposed system.
Fig. 4:
Resonant inductive coupling.
Table 1:
Parameters of the coils.
| Number of turns for the primary and secondary coils (N1 & N2) | 50 & 15 |
| The outer radius of the primary and secondary coil (RO1 & RO2) | (112 & 35) mm |
| Inner radius of the primary and secondary coil (Ri1 & Ri2) | 13 mm |
| Space between turns (S1 & S2) | (1 & 0.5) mm |
| Number of strands (Ns1 & Ns2) | (103 & 345) |
| Wire diameter (W) | 1 mm |
Fig. 5:
Aligned circular planar spiral coil.
Fig. 6:
Planar spiral coil with lateral misalignment.
Fig. 7:
Three-layer Tx coil.
Fig. 8:
Non-inverting Buck-Boost converter.
Fig. 9:
Coil design flowchart.
Fig. 10:
Transmission circuit power stabilization flowchart.
Fig. 11:
Simulink model of the proposed system.
Fig. 12:
Mutual inductance at a single-layer Tx coil.
Fig. 13:
Theoretical efficiency of the WPT system at a single-layer Tx coil.
Fig. 14:
Mutual inductance at a multilayer Tx coil.
Fig. 15:
Theoretical efficiency of the WPT system at multilayer Tx coil.
Fig. 16:
Simulated efficiecy of the proposed system.
Fig. 17:
variation of mutual inductance with lateral alignment.
Fig. 18:
3D representation of the relationship between duty cycle, distance and efficiency.