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Updated: Jun 18, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

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Published on: February 5, 2020

Body motion for powering biomedical devices.

Edwar Romero¹, Robert O Warrington, Michael R Neuman

¹Mechanical Engineering Department, Michigan Technological University, Houghton, MI 49931, USA. eromero@suagm.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|December 8, 2009

Summary

This summary is machine-generated.

This study presents an axial flux generator that harvests kinetic energy from body motion to power miniature biomedical devices. A small prototype generated 3.9 microwatts of power during walking, demonstrating potential for self-powered electronics.

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Area of Science:

Biomedical Engineering
Energy Harvesting
Mechanical Engineering

Background:

Kinetic energy harvesting is crucial for powering portable electronics, especially for biomedical applications.
Body motion can be harnessed to generate power for small devices, extending battery life or enabling self-powered operation.
Existing methods often face limitations in efficiency and form factor for wearable applications.

Purpose of the Study:

To present an axial flux generator for harvesting kinetic energy from human activities.
To demonstrate the feasibility of powering miniature biomedical devices using body motion.
To optimize the design for compact size and efficient power generation.

Main Methods:

An axial flux generator design featuring a gear-shaped planar coil and a multipole NdFeB permanent magnet ring with an eccentric weight was developed.
Energy generation mechanism relies on electromagnetic induction caused by changing magnetic flux during generator oscillations from body motion.
A 1.5 cm³ prototype was constructed and tested.

Main Results:

The prototype generator produced 3.9 microwatts of power during walking when placed laterally on the ankle.
The device effectively converts kinetic energy from human motion into electrical energy.
The compact size (1.5 cm³) is suitable for integration into wearable biomedical devices.

Conclusions:

The presented axial flux generator is a viable solution for harvesting kinetic energy from human motion.
This technology holds promise for self-powered miniature biomedical devices, reducing reliance on batteries.
Further research can optimize the design for higher power output and broader applications in wearable technology.