Measurement of Magnetic Properties at High Temperature and Application to Magneto-Thermal Coupled Analysis of Induction Heater

Norio Takahashi
Department of Electrical and Electronic Engineering, The Graduate School of Natural Science and Technology, Okayama University


The magnetic properties of magnetic materials are considerably changed near the Curie temperature. The consideration of the temperature dependence of the B-H curves and iron loss curves is necessary for the precise analysis. In this paper, the measuring method of magnetic properties at high temperature using ring specimens is examined, and a technique to improve the accuracy is investigated. The eddy current and temperature distribution of an induction heater are analyzed considering temperature dependence of magnetic characteristics which is measured by us.
It is shown that the calculated values of temperature are in good agreement with measured values.
Magnetic Properties, High Temperature, Induction Heating, Coupled Analysis

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