Basic properties of grain oriented electrotechnical steels

Directorate-General For Translation European Commission

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Industrial research and development

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• Publié par: EUROPEAN-COMMISSION
• Nombre de lectures: 12
• Langue: English
• Poids de l'ouvrage: 4 Mo

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Commission of the European Communities
technical steel research
Properties and service performance
Basic properties of grain oriented
electro-technical steels
Report
EUR 8270 EN
Blow-up from microfiche original Commission of the European Communities
technical steel research
Properties and service performance
Basic properties of grain oriented
electro-technical steels
P. BECKLEY
British Steel Corporation
33, Grosvenor Place, London SW1X7JG
Great Britain
Contract No 7210.KL/802
(1.7.1978- 30.6.1981)
FINAL REPORT
Directorate-General
Science, Research and Development
1983 EUR 8270 EN Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General
Information Market and Innovation
Bâtiment Jean Monnet
LUXEMBOURG
LEGAL NOTICE
Neither the Commission of the European Communities nor any person acting
on behalf of then is responsible for the use which might be made of
the following information
'ECSC-EEC-EAEC, Brussels · Luxembourg BASIC PROPERTIES OF GRAIN ORIENTED
ELECTROTECHNICAL STEELS
•
Agreement No. 7210.KL/802
FINAL REPORT
Po Beckley
(British Steel Corporation)
EUR 8270 EN 7210.KL/80
BASIC PROPERTIES OF GRAIN ORIENTED ELECTROTECHNICAL STEELS
British Steel Corporation
ECSC Agreement No. 7210.KL/802
Summary
A wide ranging and detailed study has been made of some of the fundamenta
ferromagnetic domain features which determine the basic magnetic properties o
electrotechnical steel as well as its performance in service.
The work is based upon and is an extension of the work of Contract 621O.KL/8/801 s
that the two pieces of work form a continuum.
Measurements have been made of Barkhausen Noise, and the properties of domains a
related to surface features.
A detailed analysis of the dynamics of domain wall movement within small groups o
grains has been used to throw light on the influence of the effects of grai
boundaries.
The behaviour of electrotechnical steel in simulated service conditions in built-u
cores has been studied and the results of waveform analysis and flux distributio
patterns have been viewed alongside theoretical models aimed at simulating an
predicting core behaviour.
Supplementary studies of coating and magnetostrictive behaviour have also bee
carried out.
The general result is a considerable expansion of knowledge of the properties o
electrotechnical steels and the prime determinants of their behaviour.
It is expected that consideration of the results reported will enable the users an
designers of electrical machines to take a better and fuller advantage of on-goin
developments in the properties of electrotechnical steels in such a way that energ
saving can be achieved. 7210.KL/802
CONTENTS Page
SECTION I: SUMMARY REPORT
SECTION II: FINAL TECHNICAL REPORT
1. GENERAL INTRODUCTION
7 2. LOSS AND DOMAINS
7 2.1 Barkhausen Noise
13 2.2 Domain Studies
19 2.3 Influence of Grain Boundaries on Loss
3 FLUX DISTRIBUTION AND WAVEFORMS 27
27 3.1 Waveform Recording and Analysis
33 3.2 Flux Distribution in Cores
4 COATINGS 47
4.1 Infrared Examination of Coatings on Grain Oriented
Silicon Steel 47
50 5 STRESS AND TEMPERATURE
5.1 Magnetostriction Studies 50
TABLES 56
FIGURES 81
ii