A high capacity transcutaneous energy transmission system

Area of Science:

• Biomedical Engineering
• Electrical Engineering
• Medical Devices

Background:

• Internal medical devices require reliable and efficient power sources.
• Transcutaneous energy transmission systems (TETS) offer a promising solution for powering implanted devices wirelessly.
• Existing TETS may face challenges with efficiency, voltage regulation, and power delivery for high-demand applications.

Purpose of the Study:

• To develop and evaluate a high-power transcutaneous energy transmission system (TETS) for mechanical circulatory support systems.
• To assess the efficiency and output stability of the TETS across various operating conditions.
• To analyze the underlying resonant circuit dynamics for improved power transfer.

Main Methods:

• Design and implementation of a 60 W TETS with an input power conditioning circuit.
• Efficiency measurements using resistive loads and a mock circulation system with a mechanical circulatory support system.
• Analysis of inductively coupled resonant circuits using mathematical modeling.

Main Results:

• The TETS achieved an overall efficiency of 77% with a resistive load and 74% with a mechanical circulatory support system.
• The power conditioning circuit demonstrated 94% efficiency independently.
• Stable output with only 10% variation was achieved with coil separation up to 25 mm by tuning the resonant frequency.

Conclusions:

• The developed TETS is capable of delivering high power efficiently and stably for internal medical devices.
• The system's performance is suitable for demanding applications like mechanical circulatory support.
• Mathematical analysis provides insights into power transfer efficiency and potential for output voltage control.