Design and simulation of core-ring magnet

configurations for maximising energy

transduction in linear actuators and micro-

energy generators

Rathishchandra. R. Gatti, Ian. M. Howard, and

Mikail. F. Lumentut.

Linear Electromagnetic Transducers

Based on electromagnetic induction.

Solenoid : Electrical to

linear motion

Linear Generator/Energy

Harvesters : Linear motion

to Electrical energy

Linear transduction applications

Research ObjectiveTo find out Magnet – Iron

core design configurations

to increase the rate of

change of magnetic flux for

maximizing energy

transduction efficiency.

Magnetostatic numerical

simulation – ANSOFT

Maxwell.

Motivation : Spatial variation of the magnetic field and its influence

5

R.R. Gatti, and I.M. Howard. (2012).

Electromagnetic Energy Harvesting by

Spatially Varying the Magnetic Field.

Presented at Proceedings of the 2011 2nd

International Congress on Computer

Applications and Computational Science.

Models considered for numerical simulation

Results & Discussion

Iron

Core Ring

magnet

When applied on SDOF1D EMVEH at lower amplitudes.

Magnet

Coil

Vibration

• Tapered (TT) design was suitable for achieving the

highest maxima of the magnetic field Bx-max as well

highest spatial variation of the magnetic field.

• The experimentation of the 1TT, 2TT and 4TT

designs for energy performance in the SDOF1D

EMVEH validates that the 1TT design is suitable for

both maximum power and broadband energy

harvesting at very low amplitude of 2 mm.

• Useful for developing electromagnetic transducers

Conclusions