Effect of Performance of A DC Motor by Replacing Ferrite Magnet with Melt Spun NdFeB Magnet

Permanent magnets have been used in many applications and industries a long time
ago since earlier 20th century. It has been used for consumer electronics, appliances
and tools, factories automation and also for medical and educational purposes.
Nowadays, peoples are coming with researches to produce permanent magnet with
greater strength for heavy applications and also to reduce the volume of the magnet
without compromising the magnetic properties. One of its applications is in
Permanent Magnet DC Motor (PMDC motor). The author studied the effect of
performance of a DC motor by replacing a ferrite magnet with the melt spun NdFeB
Magnet. In this project the author fabricated a bonded NdFeB for a DC motor from
NdFeB alloy powders which are produced from melt spinning process. The magnet is
fabricated by using compression moulding technique and using epoxy as its binder.
The fabricated magnet is then magnetised by using magnetizer. Besides,
microstructure and chemical properties of the magnet is checked by using optical
microscope and also Scanning Electron Microscopy (SEM) with chemical analysis.
Magnetic properties of the magnet is also analysed by using Vibrating Sample
Magnetometer (VSM). Physical properties of the magnet such as the density is also
will be analysed. After all the work done, the DC motor speed increased for 38.3%.
This result shows that by replacing ferrite magnet with bonded NdFeB magnet able
to build a more efficient motor.