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An inductive-link with a regulated secondary voltage based on frequency adjustment.

Pablo Aqueveque, Marcial Sáez, Juan Eduardo Rodríguez

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|February 1, 2013

Summary

This study presents a wireless power system for biomedical implants that eliminates the need for an internal voltage regulator. By adjusting the inductive link

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Area of Science:

Biomedical Engineering
Electrical Engineering
Medical Devices

Background:

Implantable biomedical devices require stable power.
Traditional systems often use internal voltage regulators, increasing implant size and heat.
Wireless power transfer is a key technology for untethered implants.

Purpose of the Study:

To develop a wireless power system for biomedical implants that removes the need for an internal voltage regulator.
To demonstrate regulated voltage delivery through external frequency control.
To reduce implant operating temperature and improve device longevity.

Main Methods:

A wireless power transfer system utilizing an inductive link was designed.
The operating frequency of the inductive link was varied to control the output voltage.
The distance between the transmitter and receiver coils was adjusted between 0mm and 40mm.

Main Results:

A regulated voltage was successfully achieved at the secondary coil without an internal regulator.
The operating frequency varied between 950 kHz and 1.2 MHz to maintain voltage regulation across different coil distances.
External supply voltage did not require elevation for internal voltage regulation.

Conclusions:

The proposed system effectively eliminates the need for an internal voltage regulator in wireless powered implants.
Varying the operating frequency of the inductive link provides a viable method for voltage regulation.
This approach reduces implant temperature, enhancing safety and device performance.