Analyzing the Electromagnetic Processes in Magnetohydraulically Stirring Liquid Metals
The article presents an analytic model of electromagnetic field in the gap between the inductor of an MHD stirrer and melt, which takes into account a discrete distribution of the inductor current load and its finite length. The solution is obtained in the form of Fourier series as a function of a complex argument. The differential and integral characteristics of the device are determined together with the equivalent circuit parameters for each phase of the inductor winding. Imbalance between the phases and the influence due to the longitudinal effect and due to the discretely distributed winding on the electromagnetic power and force are shown on the examples of calculating the MHD stirrer having different configurations of its windings. This information is necessary for determining the geometric and power performance characteristics of the inductor and for designing the semiconductor power supply source for the MHD stirrer. The obtained results serve as the basis for analyzing the electromagnetic processes and elaborating an MHD stirrer design procedure.