Article
MATLAB based computational tool for inductive coil link parameters in retinal prosthesis
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Authors
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Mahmut Emin Celik
- Electrical Electronics Engineering Department, Faculty of Engineering, Gazi University, Ankara, Turkey
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E. Aydin
- Electrical Electronics Engineering Department, Faculty of Engineering, Gazi University, Ankara, Turkey
| Published: | November 30, 2017 |
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Outline
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Objective: It is aimed to develop basic calculation tool covering processes that calculates of inductive coil link parameters in magnetostatic conditions using governing equations and compares them to Finite Element Analysis based model outputs.
Material/Method: The efficiency of wireless power transfer units of retinal prosthesis is increased using different approaches such as various compensation methods and the use of additional layers. In this study, the governing equations of an inductive coil link with series-series compensation topology are combined to develop a parameter calculation tool using MATLAB. The results of custom-written codes in MATLAB are compared to a model developed using Finite Element Method.
Results: It is assumed that primer and seconder coils have 2 cm and 3 cm in diameter respectively while the power to be transferred is 56 mW. MATLAB codes are resulted that the operating frequency is calculated as 2.7 Mhz, moreover the coupling coefficient is determined as 0.13. On the other hand, it is seen that the results obtained from the model developed using the specified physical properties and the Finite Element Method are compatible with the results obtained from the MATLAB codes.
Discussion: The developed MATLAB code is used to obtain optimal values of several basic parameters such as coil dimensions, number of turns and resonance frequency of the coil model for magnetostatic analysis. It could be used as a powerful tool to calculate the power transfer efficiency after power electronics and compensation units are added to primer and seconder side.
Conclusion: This study, which includes the development of a computational tool using related governing equations in MATLAB, provides an adaptive platform for future work on the wireless power transfer efficiency for retinal implants.
