Modeling and validation of high-temperature electromagnetic actuator

This paper presents a nonlinear force model of an electromagnetic actuator and experimental validation of the model when the actuator is operating in a high-temperature environment up to 500°C. In order to predict the force producing capability of the actuator, the magnetic properties of the core material (SUS410) at several temperatures up to 500°C are measured. A modified Frohlich-Kennelly equation is then used for representing the magnetization curve and identify parameters through curve fitting. The temperature-dependent magnetization data are utilized for magnetic circuit modeling and finite element analyses. A test rig is set-up where the actuator is put into an oven and measured the output force while varying the temperature up to 500°C.