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GB/T 30109-2013: AC loss measurements -- Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method
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AC loss measurements -- Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method
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GB/T 30109-2013
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PDF similar to GB/T 30109-2013
Standard similar to GB/T 30109-2013 GB/T 36126 JJF 1234 JJG 376 Basic data | Standard ID | GB/T 30109-2013 (GB/T30109-2013) | | Description (Translated English) | AC loss measurements -- Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A55 | | Classification of International Standard | 17.220.20 | | Word Count Estimation | 31,392 | | Quoted Standard | IEC 60050-815-2000 | | Adopted Standard | IEC 61788-8-2010, IDT | | Regulation (derived from) | National Standards Bulletin No. 25 of 2013 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the use of the detection coil measurements alternating magnetic field transverse composite superconducting wires total exchange loss methods. Loss may include hysteresis loss, coupling loss and eddy current loss. IEC 61788-13 stand | GB/T 30109-2013: AC loss measurements -- Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method
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AC loss measurements.Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic field at liquid helium temperature by a pickup coil method
ICS 17.220.20
A55
National Standards of People's Republic of China
AC loss measurements at liquid helium temperatures alternating transverse
Magnetic field superconducting wire circular cross-section of the total exchange loss
Detection coil measurements
(IEC 61788-8Ed.2.2010, IDT)
Issued on. 2013-12-17
2014-05-15 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Principle 3
5 means 3
5.1 Test apparatus 3
5.2 detection coil 3
5.3 compensation circuit 4
Sample Preparation 6 4
Sample 4 6.1 coil
6.1.1 Sample wound 4
4 6.1.2 sample coil shape
6.1.3 The maximum bending [song] strain 4
6.1.4 Sample processing ends cross section 4
6.2 Sample bobbin 4
7 Test Conditions 5
7.1 external magnetic field 5
7.1.1 magnitude of the applied magnetic field 5
7.1.2 the applied magnetic field direction 5
7.1.3 external magnetic field waveform 5
7.1.4 The frequency of the applied magnetic field 5
7.1.5 the applied magnetic field uniformity 5
Installation 5 7.2 sample
7.3 Temperature Measurement 5
7.4 Test Procedure 5
7.4.1 Compensation 5
7.4.2 Background loss measurement 6
7.4.3 Loss Measurement 6
7.4.4 Calibration 6
8 Calculation of results 6
The magnitude of the applied magnetic field of 8.1 6
8.2 magnetization 6
8.3 magnetization curve 6
8.4 ac loss 6
8.5 hysteresis loss 7
8.6 coupling loss and the coupling time constants [5,6] 7
Uncertainty 7 9
9.1 Summary 7
Uncertainty of the measuring equipment 9.2 7
9.3 Uncertainty magnetic field 7
9.4 Measurement uncertainty Temperature 7
8 10 test reports
10.1 identification of samples 8
10.2 coil structure of the sample 8
10.3 TEST CONDITIONS 8
10.4 Results 8
10.5 measuring device 9
10.5.1 detection coil 9
10.5.2 Test System 9
Appendix A (informative) Supplementary information 1 to 10 of Chapter 11
Annex B (informative) Poynting vector AC loss measurement interpretation [10] 13
Annex C (informative) method for estimating the detection coil 14 geometric errors
Annex D (informative) Recommended calibration method magnetization and exchange losses 15
Annex E (informative) all types of waveform applied magnetic field coupling loss 17
Annex F (informative) Uncertainty consider 18
Annex G (informative) Estimation probe coil for AC loss measurements Uncertainty [22] 22
References 24
1 Sample standard coil and detection coil arrangement of Figure 9
Figure 2 detection coil measured AC losses typical circuit 10
Figure C.1 computational geometry coefficient G contour legend 14
Figure D.1 estimate the critical field by the magnetization curve 16
Figure E.1 period T = waveform applied magnetic field of 1/f 17
Table F.1 two nominally identical extensometer output signal 19
Table F.2 average of two output signals 19
Table F.3 test standard deviation of two output signals 19
Standard table F.4 two output signals of uncertainty 19
Table F.5 two output signals of the coefficient of variation of 20
Table G.1 detection coil transfer laws relative uncertainty of (α = 0.5) 23
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard uses the translation method is equivalent to using IEC 61788-8Ed.2.2010 "AC loss measurements at liquid helium temperatures transverse alternating magnetic field
Circular cross-section superconducting wire coil to detect the total AC loss measurement. "
This standard made editorial changes.
Correspondence between the consistency of the standards of international documents and normative references of the following documents.
--- GB/T 13811-2003 Electrotechnical terminology superconductivity (IEC 60050-815.2000, MOD).
This standard by the National Standardization Technical Committee proposed superconductivity.
This standard by the National Standardization Technical Committee superconducting (SAC/TC265) centralized.
This standard is drafted by. Institute of Electrical Engineering, Chinese Academy of Sciences Institute of Physics.
Participated in the drafting of this standard. Western Superconducting Material Technology Co., Ltd., North China Electric Power University.
The main drafters of this standard. Wang Yinshun, Zhengdong Ning, Liu Yiping, Zhu Zhiqin, Zhusi Hua.
Introduction
International Electrotechnical Commission Technical Committee superconducting (IEC /TC90) proposed using a magnetometer and detection coil method to measure a composite superconducting wire in
Transverse magnetic field varies with time in exchange losses. They represent a variety of measuring the impact delivered the most common transverse magnetic configuration --- Field
Flow of standardized methods loss.
IEC /TC90 decided to split the proposal into two documents were covered by two standard methods. One of them is used to describe the hysteresis loss
Consumption and at a low frequency magnetic field (or low field sweep rate) case total AC losses magnetometer measurements; Another method for describing a high-frequency magnetic
Detection coil AC loss measurement of the total field (field sweep rate or higher) under. Magnetometer measurement frequency range 0Hz ~ 0.06Hz,
Detection coil measurement frequency range of 0.005Hz ~ 60Hz, the overlapping portion (0.005Hz ~ 0.06Hz) are two methods can be used
Frequency Range.
This standard relates to the detection coil method. Its ac loss Standard Test Method section refers to advanced materials and standards based on the count of Versailles
Plan (VAMAS) in preliminary work on NbTi composite superconductors exchange losses standardized [1].
AC loss measurements at liquid helium temperatures alternating transverse
Magnetic field superconducting wire circular cross-section of the total exchange loss
Detection coil measurements
1 Scope
This standard specifies the use of coil measurements to detect the alternating magnetic field transverse composite superconducting wire of the total exchange loss methods. Loss may include
Hysteresis loss, coupling loss and eddy current loss. IEC 61788-13 has been described only measure DC magnetic or low magnetic field sweep rate hysteresis loss
Consumption standard method [2].
This standard applies to the pulse coil and AC coil metal and oxide superconducting wire circular cross section, time-varying magnetic (time-varying) of
Field and/or current applications will produce exchange losses. In conventional coil applications in electromagnetic field configuration, exchange losses mainly from the (time-varying) magnetic
field. For in a horizontal alternating magnetic field of the superconducting wire, the method usually used in liquid helium temperature, frequency range up to the upper limit frequency 50/60Hz
Total AC loss measurement. Adopt the method of measuring the total AC loss superconducting filaments into the hysteresis loss, coupling loss between the wire and often
Vortex guide section loss. In the outer superconducting wire no larger conductor sheath thickness is normal circumstances, exchange losses primarily hysteresis loss and
Coupling loss; week since the coupling loss is proportional to frequency, the hysteresis loss in part by the lower frequency range the measured AC loss
Loss consumption extrapolated to zero frequency estimate obtained.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
IEC 60050-815.2000 Electrotechnical terminology superconductivity [Internationalelectrotechnicalvolcabulary (IEV) -
Part 815. Superconductivity]
3 Terms and Definitions
IEC 60050-815.2000 definition of terms and definitions as well as the following terms and definitions apply to this document.
3.1
AC loss ACloss
Due to time-varying magnetic field or current composite superconductors in power consumption.
[IEC 60050-815. The 2000815-04-54]
3.2
Hysteresis loss hysteresisloss
Ph
Superconductor in a magnetic field variation of one loss occurs, regardless of their loss of value and frequency of each cycle.
Note. The hysteresis loss by the magnetic flux pinning cause irreversible magnetic superconducting material caused.
[IEC 60050-815. The 2000815-04-55]
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