Over Current Mode Analysis for Planar Inductor Using Finite Element Method.

Over current detection characteristics based on magnetic saturation of an outer magnetic core type planar inductor were analyzed. The planar inductor had two planar windings: an inner planar coil connected to the main electrical circuit, and an outer planar search coil on the top surface of the outer thin magnetic core. The planar inductor was used as an energy storage element for high-frequency power conversion equipment, such as switching dc-dc converters. The basic operation of the over current mode due to magnetic core saturation was simulated by a nonlinear finite element method.