GB/T 24270-2009 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 24270-2009 | English | 135 |
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Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials
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GB/T 24270-2009: Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT24270-2009
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 29.030
K 14
Method of measurement of temperature coefficient of
magnetic properties of permanent magnetic materials
Issued on: JUNE 19, 2009
Implemented on: FEBRUARY 1, 2010
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Measuring device... 5
5 Heating and temperature measuring device... 6
6 Test specimen... 7
7 Measurement methods... 7
8 Data processing... 8
9 Test report... 8
References... 9
Method of measurement of temperature coefficient of
magnetic properties of permanent magnetic materials
1 Scope
This standard specifies the measurement method for the temperature coefficients of
remanence and intrinsic coercivity of permanent magnetic materials in a closed
magnetic circuit.
This standard is applicable to the measurement of the temperature coefficient of
magnetic properties of various permanent magnetic materials.
2 Normative references
The clauses in the following documents become the clauses of this standard through
reference in this standard. For all the referenced documents with dates, all the
subsequent amendments (excluding errata) or revisions are not applicable to this
standard. However, the parties who reach an agreement based on this standard are
encouraged to study whether the latest versions of these documents can be used. For all
the referenced documents without dates, the latest versions are applicable to this
standard.
GB/T 3217-1992 Methods of test of the magnetic properties of permanent magnetic
(magnetically hard) materials
GB/T 9637 Electrotechnical terminology - Magnetic materials and components
3 Terms and definitions
The terms and definitions established in GB/T 9637 and the following apply to this
standard.
3.1 temperature coefficient of remanence α(Br)
The ratio of the relative change in remanence due to temperature change to the
temperature change.
Where.
α(Br) -- temperature coefficient of remanence, the unit is %/K;
T1 -- basic temperature, the unit is Kelvin (K);
T2 -- the upper limit temperature of temperature change, the unit is Kelvin (K);
Br(T1) -- remanence at temperature T1, the unit is tesla (T);
Br(T2) -- remanence at temperature T2, the unit is tesla (T).
3.2 temperature coefficient of intrinsic coercivity α(HcJ)
The ratio of the relative change in intrinsic coercivity due to temperature change to the
temperature change.
Where.
α(HcJ) -- temperature coefficient of intrinsic coercivity, the unit is %/K;
T1 -- basic temperature, the unit is Kelvin (K);
T2 -- the upper limit temperature of temperature change, the unit is Kelvin (K);
HcJ(T1) -- intrinsic coercivity at temperature T1, in ampere per meter (A/m);
HcJ(T2) -- intrinsic coercivity at temperature T2, in ampere per meter (A/m).
4 Measuring device
4.1 Closed magnetic circuit measuring device
The device for measuring the remanence Br and intrinsic coercivity HcJ in a closed
magnetic circuit is shown in Figure 1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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