Development of novel techniques for the assessment of inter-laminar resistance in transformer and reactor cores

Eddy currents flowing in large transformer and reactor cores can degrade their efficiency or even result in catastrophic failure. High inter-laminar resistance is required to prevent the circulation of eddy currents. Failures can occur due to defects in strip edge, coating defects and non-uniform clamping stresses in the laminated core. To date, no link has been found between industry measurements and core performance.

The student will have the opportunity to work closely with industrial partners including Cogent Power Ltd., a leading European manufacturer of high efficiency electrical steels, and a major international manufacturer of power transformers.

Novel test systems will be developed for measurement of inter-laminar resistance and the non-destructive detection of defects in core stacks. This data will be used to develop CAD models to simulate and predict the relationship between core defects and eddy currents.