Optimization of Geometry and Dimensions of Magnetic Switch Core with Approach of Flux Density Uniformity

Magnetic switch is an inductor with the capability of saturation that uses the non-linear curve of magnetic materials. This saturable inductor performs switching operation using the concept of magnetic saturation as shifting from a very high impedance area to very low impedance area. Magnetic switch appropriate design for switch optimal performance is very important. The core material and structure parameters, coil material and structure, the cross-section of conductors, core cross-sectional area and the number of coil turns, affect on design trend. Despite the importance of magnetic switch design on its operation, no design procedure has been developed so far. In this paper, the structure and core dimensions on designing and operation of the magnetic switch are investigated and simulation results are provided. For different parts of the core, magnetic flux density distribution is shown and optimum size concerning the limitations suggested for the magnetic switch core.