[Study on Chaotic Detection Method of Pacemaker Contact-Less Power Supply].

Area of Science:

• Biomedical Engineering
• Electrical Engineering
• Control Systems

Background:

• Cardiac pacemakers require reliable, stable power.
• Contact-less power supply technology faces challenges in maintaining output voltage and current stability.
• Existing methods may not adequately address dynamic changes in power supply and load conditions.

Purpose of the Study:

• To propose a novel wireless feedback voltage stabilizing technology for cardiac pacemaker contact-less power supply.
• To enhance the reliability and stability of power delivery to implanted devices.
• To improve the real-time voltage and current control method for internal power supply filter circuits.

Main Methods:

• Application of wireless feedback voltage stabilizing technology.
• Utilizing chaotic control theory and phase diagram analysis for real-time voltage and current detection.
• Dividing the phase diagram into 8 segments with 7 zero-extreme points for precise control.
• Detecting zero-extreme points to obtain average voltage and current values.

Main Results:

• Achieved real-time, accurate voltage and current control despite changes in inductance coupling, external voltage, and load.
• Significantly improved circuit detection time.
• Shortened response time to less than 1/2 switching cycles of the devices.
• Validated the effectiveness and feasibility of the proposed detection algorithm through simulations and experiments.

Conclusions:

• The proposed wireless feedback voltage stabilizing technology effectively ensures stable power supply for cardiac pacemakers.
• The chaotic control-based phase diagram method offers a rapid and accurate detection algorithm for critical parameters.
• This technology enhances the reliability of contact-less power supply for medical implants.