Details of Grant 

EPSRC Reference:	GR/R82869/01
Title:	Measurement and prediction of magnetic properties of wound cores under distorted flux at medium frequency.
Principal Investigator:	Moses, Professor AJ
Other Investigators:
Researcher Co-Investigators:	Dr F ANAYI Dr PI Anderson
Project Partners:	Telmag Magnetic Components Ltd
Department:	Sch of Engineering
Organisation:	Cardiff University
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 2002	Ends:	30 November 2005	Value (£):	141,110
EPSRC Research Topic Classifications:	Electromagnetics
EPSRC Industrial Sector Classifications:	Manufacturing Communications Energy
Related Grants:
Panel History:
Summary on Grant Application Form
Greater numbers of toroidal magnetic cores are being used in applications when they are magnetised in such a way that their permeability and magnetic losses are degraded by the presence of high flux harmonics caused by electronicaly generated or controlled voltage sources. It is known that the geometrical shape of wound cores affects their magnetic properties under sine wave flux conditions and that these effects can be approximately predicted using empirical or artificial neural network (ANN) approaches. However little is known about performance under highly distorted waveform conditions. It is proposed to use novel magnetising systems to test a wide range of toroidal cores under practical distorted waveform conditions and to generate magnetic data in a format suitable for training a ANN and which can be used by device designers to characterise performance under a wide range of conditions. Two forms of predictive approach will be evaluated and compared with practical measurements obtained from a universal magnetic tester. The predictive method which proves most successful will be refined and set in an algorithm suitable for industrial application. The measured data and predictions will be used to obtain a better understanding of the material, geometrical and processing parameters which cause differing degrees of degradation of magnetic performance in different type of core shapes wound from various materials under distorted waveform conditions compared to sinusoidal flux excitation.
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