Measurements of Magnetic Properties of Electromagnetic Actuator in High-Temperature Environment

Abstract

Electromagnetic actuators are versatile and able to meet demanding requirements, such as operation in very low or very high temperatures. When the actuator is used in a high-temperature environment up to 500°C, we need to know how the force-producing capability of the actuator is affected by the operating temperature. Specifically, it is necessary to know the temperature-dependence of magnetic properties that determine the mechanical forces. In this paper, we measure the changes in magnetic properties of SUS410 material in hightemperature environment. We also devise a novel signal processing technique to remove the integration drift. At the field strength of 18,000 A/m, we found that the flux density at 500°C is decreased by 26%, compared to the result at room temperature. Therefore, the actuator must be sized appropriately, if it is to operate in hightemperature settings.

Study on Proton Radiation Resistance of 410 Martensitic Stainless Steels under 3 MeV Proton Irradiation

“…These series of steels can be magnetized in the low electric field so that they can be used for electric solenoid cores. Among the various 400 series, 410 stainless steels, which are heat treatable alloys with a lower Cr and higher carbon content, have excellent creep strength and corrosion resistance and are suitable for high-temperature operation [6][7][8]. Therefore, they become strong candidates for structural, as well as promising magnetic materials for next generation fission power plants.…”