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Wireless power system for left ventricular assist device: Influence of coil design and tissue behavior on efficiency Cover

Wireless power system for left ventricular assist device: Influence of coil design and tissue behavior on efficiency

Open Access
|Jun 2025

Figures & Tables

Fig. 1:

Wireless power transfer of LVAD.
Wireless power transfer of LVAD.

Fig 2.:

Block diagram of the WPT system.
Block diagram of the WPT system.

Fig. 3:

Block diagram of the proposed system.
Block diagram of the proposed system.

Fig. 4:

Resonant inductive coupling.
Resonant inductive coupling.

Fig. 5:

Aligned circular planar spiral coil.
Aligned circular planar spiral coil.

Fig. 6:

Planar spiral coil with lateral misalignment.
Planar spiral coil with lateral misalignment.

Fig. 7:

Three-layer Tx coil.
Three-layer Tx coil.

Fig. 8:

Non-inverting Buck-Boost converter.
Non-inverting Buck-Boost converter.

Fig. 9:

Coil design flowchart.
Coil design flowchart.

Fig. 10:

Transmission circuit power stabilization flowchart.
Transmission circuit power stabilization flowchart.

Fig. 11:

Simulink model of the proposed system.
Simulink model of the proposed system.

Fig. 12:

Mutual inductance at a single-layer Tx coil.
Mutual inductance at a single-layer Tx coil.

Fig. 13:

Theoretical efficiency of the WPT system at a single-layer Tx coil.
Theoretical efficiency of the WPT system at a single-layer Tx coil.

Fig. 14:

Mutual inductance at a multilayer Tx coil.
Mutual inductance at a multilayer Tx coil.

Fig. 15:

Theoretical efficiency of the WPT system at multilayer Tx coil.
Theoretical efficiency of the WPT system at multilayer Tx coil.

Fig. 16:

Simulated efficiecy of the proposed system.
Simulated efficiecy of the proposed system.

Fig. 17:

variation of mutual inductance with lateral alignment.
variation of mutual inductance with lateral alignment.

Fig. 18:

3D representation of the relationship between duty cycle, distance and efficiency.
3D representation of the relationship between duty cycle, distance and efficiency.

Simulated efficiency at different values of x_

X (mm)Efficiency %
099.5
1899.0
3695.9
5476.0

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
Language: English
Page range: 69 - 79
Published on: Jun 16, 2025
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2025 Hawraa A. Almorshidi, Ali Jafer Mahdi, Manal Hussain Nawir, published by University of Oslo
This work is licensed under the Creative Commons Attribution 4.0 License.