Analytical Model Developments and Field Verifications of a Linear Induction-type Electromagnetic Stirrer

To improve the production qualities of a steel mill, an in-mold electromagnetic stirrer (M-EMS) is generally implemented at the continuous casting process to provide the desired stirring forces to the molten steel. As the system is mainly operated by the interactions of induced eddy currents and the traveling electromagnetic fields in the molten steel, compositions of the stator winding currents and structures of the M-EMS will be the dominant factors that affect the entire system performance. A compact mathematical model with sufficient accuracy that can be easily adopted by the site engineers for system operations will be deduced from the system structure. Besides, the flux path modeling of the system will be refined to correct the temperature- and material-dependent characteristics of the molten steel, thus the overall indices of the M-EMS can be conveniently derived and predicted for practical designs and operations.