DIN 50460-1988 Determination of magnetic properties of soft magnetic materials general terminology and principles of measurement《软磁性材料的磁性的测定 概述、术语和测量原则》.pdf
《DIN 50460-1988 Determination of magnetic properties of soft magnetic materials general terminology and principles of measurement《软磁性材料的磁性的测定 概述、术语和测量原则》.pdf》由会员分享,可在线阅读,更多相关《DIN 50460-1988 Determination of magnetic properties of soft magnetic materials general terminology and principles of measurement《软磁性材料的磁性的测定 概述、术语和测量原则》.pdf(20页珍藏版)》请在麦多课文档分享上搜索。
1、UDC 621.318.1 : 621.317.4 : 001.4 DEUTSCHE NORM August i9aa Determination of magnetic properties of soft magnetic materials General, terminology and principles of measurement DIN 50 460 Bestimmung der magnetischen Eigenschaften von weichmagnetischen Werk- stoffen; Allgemeines, Begriffe, Grundlagen d
2、er Prfverfahren Supersedes September 1980 edition of this standard and September 1975 edition of DIN 50465. In keeping with current practice in standards published by the International Organization for Standardization (/SO), a comma has been used throughout as the decimal marker. 1 Field of applicat
3、ion . 2 Scope . 2.1 d.c. magnetic field quantities 2.2 a.c. magnetic field quantities . 3 Terminology . 3.1 Test volume 3.2 Effective specimen mass 3.3 Specimen cross-sectional area. 3.4 Magnetic circuit . 3.5 Effective magnetic path length in a closed circuit . 3.6 3.7 Flux sensing winding (seconda
4、ry winding) Magnetizing winding (primary winding) . Contents . 2 7.2 Determination of magnetic field strength . 8 . 2 7.2.1 Determination of field strength . 2 from the closed-circuit magnetizing current. 8 sensing coils 8 Page Page , . , 2 . . 7.2.3 Direct measurement of field strength using 2 2 2
5、2 7.2.2 Measurement of field strength using field . field sensing probes 8 from the open-circuit magnetizing current with no closure yoke 9 . 2 7.3.1 Demagnetizing the specimen . 9 . 2 7.3.2 Measurement procedure . 9 . . 7.2.4 Determination of field strength . . . . 2 7.3 Plotting a normal magnetiza
6、tion curve 9 3.8 Field sensing coils and probes 3 3.9 Induced voltage (secondary voltage) 3 4 Quantities, symbols and unlts 3 5 Basic measurement requirements 5 6 Magnetic circuits 5 6.1 Closed circuits consisting of specimen material only . 5 6.2 Circuits including a closure yoke 5 6.3 Open circuit
7、s 5 6.4 User information . 5 7 d.c. magnetic fidd measurement methods. . 5 7.1 Determination of flux density . 5 7.1.1 Closed-circuit measurement of flux density 5 7.1.1.1 Air flux compensation. 5 7.1.1.2 Determination of fluxmeter constant . 6 7.1.1.3 Measurement with rapid changes in flux 6 7.1.1.
8、4 Measurement with slow changes in flux 6 7.1.2 Open-circuit measurement of flux density with no closure yoke . 6 7.1.2.1 Determination of polarization with large distance of measurement . 7 7.1.2.2 Determination of polarization with small distance of measurement . 7 7.1.2.3 Determination of flux de
9、nsity by the induction method using a fixed specimen and flux sensing winding 7 7.1.2.4 Determination of flux density or polarization by the withdrawal method . 8 7.4 Relative permeability., 10 7.5 Plotting a hysteresis loop 10 7.5.1 Plotting a closed-circuit hysteresis loop . 10 7.5.2 Plotting an o
10、pen-circuit hysteresis loop. 11 7.5.3 Continuous plotting of a hysteresis loop 11 7.6 Hysteresis energy loss per cycle. 12 7.7 Remanent flux density or remanent polarization. 12 7.7.1 Determination from the hysteresis loop . 12 7.7.2 Closed-circuit determination . 12 7.8 Coercivity 12 7.8.1 Determin
11、ation from the hysteresis loop . 12 7.8.2 Open-circuit measurement of polarization coercivity. 12 7.8.2.1 Measuring arrangement using compensating coil . 13 7.8.2.2 Measuring arrangement using probes for measuring radial field components 13 7.8.2.3 Measuring arrangement using a vibrating search coil
12、 13 7.8.2.4 Calibration of measuring arrangements for open-circuit measurement of coercivity . 13 8 a.c. magnetic field measurement methods . 14 8.1 Determination of flux density 14 8.1.1 Instantaneous values of flux density 14 8.1.2 Peak flux density 14 8.1.3 Form factor of induced voltage . 14 8.1
13、.4 Air flux compensation . 14 Continued on pages 2 to 20 uth Verlag GmbH. Beriin, has the exclusive right 01 sale for German Standards (DIN-Normen). DIN 50460 Engl. Price group i 05.90 Sales No. O1 13 Page 2 DIN 50460 Page 8.2 Determination of magnetic field strength . 15 8.2.1 Determination of fiel
14、d strength from magnetizing current . 15 8.2.2 Measurement of field strength using field sensing coils 15 8.2.3 Other methods of measuring field strength 15 8.2.4 Instantaneous value of field strength . 15 8.2.4.1 Determination from magnetizing current 15 8.2.4.2 Measurement using a field sensing co
15、il 16 8.2.5 Peak field strength 16 8.2.5.1 Determination from magnetizing current 16 8.2.5.2 Measurement using a field sensing coil 16 8.2.6 r.m.s value of field strength 16 8.2.6.1 Determination from magnetizing current 16 8.2.6.2 Measurement using a field sensing coil 16 8.3 Determination of a.c.
16、magnetization curve and amplitude permeability 16 8.4 Dynamic hysteresis loop . 17 8.4.1 Determination using phase-controlled rectifiers 17 1 Field of application This standard applies to measurements made with the specimen either in a d.c.magnetic field or in an a.c. magnetic field without a d.c. c
17、omponent with frequencies from 15 to 400 Hz and with a sinusoidalvariation in flux densityor pola- rization. 2 Scope This standard is intended to describe the principles of determining the magnetic properties of soft magnetic materials, to define the concepts used and to specify the requirements rel
18、ating to the methods of measurement. The quantities covered are the following. 2.1 d.c. magnetic field quantities Maximum magnetic flux density, Bmax, or maximum magnetic polarization, Jmm, as a function of the maxi- mum magnetic field strength,Hmax (normal magnetiza- tion curve), Bm,=f(Hmm) or Jmax
19、=f(Hmax); relative permeability, pr = f(HmaX); pairs of values B and H orJ and H required to plot the hysteresis loop; hysteresis energy loss, W, = f(Bmm) or W, = f(JmaX); remanent flux density or remanent polarization, coercivity, HB =f(B B=f(H) orJ=f(H); relative-a.c. field magnetic permeability,
20、pr= f(l?) or pairs ofvalues B(t) and H(t) orJ(t) and H(t) for plotting the dynamic hysteresis loop; remanent fux density or polarization, Br =Ir =f(B) or coercivity, Hc = f(6) or HCj =ru); Pa = f (H); Br =Ir = f U); Page 8.4.2 Determination using an oscilloscope. . 17 8.5 Remanent flux density or re
21、manent polarization 17 8.5.1 Determination from a point-by-point plot of the dynamic hysteresis loop . 17 8.5.2 Determination using an oscilloscope. . 17 8.6.1 Determination from a point-by-point plot of the dynamic hysteresis loop . 17 8.6.2 Determination using an oscilloscope. . 17 8.7 Determinati
22、on of specific total loss . 17 8.7.1 Wattmeter method. . 17 8.7.1.1 Determination from the magnetizing current. 18 8.7.1.2 Determination using field sensing coils 18 8.7.2 Loop area method . 19 8.7.4 Breakdown of losses 19 8.8 Determination of specific apparent power 19 8.4.3 Digital measurement met
23、hods 17 8.6 Coercivity 17 8.7.3 Digital method 19 f) specific total loss (total power loss), ,=f(i) or P,=fV); g) specific apparent power, S, = f(i) or s,= fe). 3 Terminology 3.1 Test volume The test volume, V, is that part of the specimen volume which is involved in the measurement. 3.2 Effective s
24、pecimen mass The effective specimen mass, ma, is the mass of that part of the specimen in which the total power losses occur. 3.3 Specimen cross-sectional area The cross-sectional area of a specimen, A, is its area at the point of measurement through which the flux passes. 3.4 Magnetic circuit The m
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