The Design and Measurement of Pulsed Magnetic Field

To investigate the solidification behavior of metallic melt under the pulsed magnetic field (PMF), a method of capacitors discharging to a pair of solenoid was utilized to produce the desired PMF. Based on the principle of R-L-C circuit and the calculation of magnetic intensity, the appropriate coil parameters of excitation solenoid, such as winding turns, layers and size, were determined. The electromagnetic induction method was chosen to measure the magnetic intensity of PMF effect zone, and the magnetic distribution curves of peak value intensity along horizontal central axes of magnetic field were obtained. The multipoint measuring results indicates that the experimental results are in close agreement with the results of calculation of electromagnetic theory and finite element analysis, which demonstrates that the design of magnetic settings is reasonable.