TC 68

Magnetic alloys and steels

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

TC 68WG 5Mr Masaaki TokunagaBPUB2021-052025

History

Stage
Document
Downloads
Decision Date
Target Date
PWI
2019-11-21 
preCD
2020-03-122020-03
CD
68/654/CD PDF file 1504 kB

2020-03-27 
PCC
2020-06-192020-06
ADTR
68/666/CC PDF file 191 kB
Word file 64 kB
2020-08-142020-12
TDTR
2020-12-042020-12
CDTR
68/675/DTR
2020-12-142021-01
PRVDTR
2021-02-052021-02
APUB
68/680/RVDTR PDF file 131 kB
Word file 33 kB
2021-02-122021-03
TPUB
2021-03-022021-03
DECPUB
2021-03-092021-04
RPUB
2021-03-292021-03
BPUB
2021-04-072021-06
PPUB
 2021-05

Abstract

IEC TR 63304:2021 (E) describes the general principle and technical details of the methods of measurement of the DC magnetic properties of permanent magnet materials in an open magnetic circuit using a superconducting magnet (SCM).

This method is applicable to permanent magnet materials, such as those specified in IEC 60404-8-1, the properties of which are presumed homogeneous throughout their volume.

There are two methods:

– the SCM-Vibrating Sample Magnetometer (VSM) method;

– the SCM-Extraction method.

This document also describes methods to correct the influence of the self-demagnetizing field in the test specimen on the demagnetization curve measured in an open magnetic circuit. The magnetic properties are determined from the corrected demagnetization curve.

NOTE These SCM-methods can determine the magnetic properties of permanent magnet materials with coercivity higher than 2 MA/m. The methods of measurement in a closed magnetic circuit specified in IEC 60404-5 can lead to significant measurement error due to saturation effects in the pole pieces of yoke for the magnetic materials with coercivity higher than 1,6 MA/m (see IEC 60404-5).


Project

IEC TR 63304 ED1

Methods of measurement of the magnetic properties of permanent magnet (magnetically hard) materials in an open magnetic circuit using a superconducting magnet