Analysis of transcutaneous inductive powering links

Inductive coupling link is widely used in transcutaneous power transmission to transfer data and power to the implanted biomedical devices such as implanted micro-sensor system. The inductive coupling variables play a strong rule in coupling efficiency. In this paper the coupling link variables is investigated and analyzed. The resonant frequency 13.56 MHz was used according to industrial, scientific and medical (ISM) band. Results show that the voltage gain V_gain of the inductive links is depended of coupling factor K and resistive load R_load (implanted device). The voltage gain increase with increasing the implanted resistance with constant K. Simulation show that when R_load=400Ω, the V_gain will be in maximum value, and when R_load=200Ω, the V_gain will be in minimum value and approximately 4v. With these results, the system operation is satisfied the requirement of the implanted devices power. Theoretical and simulation is done using software OrCAD-P spice 16.2.