Core loss improvement of silicon steel

LMDR - Laser Magnetic Domain Refinement

Optical box LMDR test system based on the lasertronic®SAO x.x/6D
© Fraunhofer IWS Dresden
Optical box LMDR test system based on the lasertronic®SAO x.x/6D

The magnetically properties of grain oriented high permeable silicon steel used for transformer cores can be improved with a laser treatment. A local and time limited heat treatment refines the domain structure and reduces the core loss. The worldwide growing energy consumption and the ambitions of efficiency energy usage lead to a rising demand of high quality materials.

Therefore a technology and system engineering solution is required, which can be integrated into existing production processes and lines. Furthermore, the motivation of energy saving necessitate technologies with highest possible improvements of magnetically properties to reduce losses and increase efficiency.