Examination of magnetic properties of magnetic materials at high temperature using a ring specimen

Norio Takahashi, Masayuki Morishita, Daisuke Miyagi, Masanori Nakano

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

The magnetic properties of magnetic materials are considerably changed near the Curie temperature. In order to analyze the magnetic characteristics of magnetic devices which operate at high temperature, such as induction heater of billets, high temperature motor, the B-H curves and iron loss curves are necessary for the precise analysis. But, the reports of the examination of the measuring method and the behavior of such magnetic properties are few. In this paper, the measuring method of magnetic properties at high temperature is investigated. It is shown that the permeability is not changed so much under about 500 °C in the case of nonoriented electrical steel. However, it changes drastically above about 500°C. The iron loss decreases with the increase of temperature. The decrease of iron loss is mainly due to the decrease of hysteresis loss with the increase of temperature.

Original languageEnglish
Article number5393189
Pages (from-to)548-551
Number of pages4
JournalIEEE Transactions on Magnetics
Volume46
Issue number2
DOIs
Publication statusPublished - 2010 Feb 1

Keywords

  • Curie temperature
  • High temperature
  • Magnetic properties
  • Ring specimen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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