A Mathematical Introduction to Conformal Field Theory(LNP NS m43 - Schottenloher
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A P P E ND I X CSELECTED MAGNETICSTEEL DATA
THIS APPENDIX lists some performance data for selected materials. It should
be understood that these materials were not selected for any reason other than
availability within the author’s laboratory. The data listed are intended for use in
educational design examples. Table C.1 lists mass density that was measured by
volumetric and mass measurements on toroidal samples. It also suggests a maximum
allowed flux density. This is based on the point where the absolute relative perme-
ability drops to 1000. Table C.2 lists the data that characterize the mB�� function
described in Chapter 2. This data was taken from Shane and Sudhoff [1] using the
procedure and apparatus described therein. The corresponding B–H characteristics of
the materials are depicted in Figure C.1. It should be understood that steel grades
have performance which is a function of history and processing. Thus, not all M19
steel has the same magnetic characteristics.
2.5
2.0
1.5
1.0
0.5
0.00 100 200 300 400 500 600 700 800 900 1000
B, T
H, A/m
Hiperco 50
M47
M36
M19
M43
Figure C.1 B–H characteristics of selected steels.
443
Power Magnetic Devices: A Multi-Objective Design Approach, First Edition. S. D. Sudhoff.© 2014 by The Institute of Electrical and Electronics Engineers, Inc. Published 2014 by John Wiley & Sons, Inc.
REFERENCE
1. G.M. Shane and S. D. Sudhoff, Refinements in anhysteretic characterization and permeability modeling,IEEE Transactions on Magnetics, vol. 46, no. 11, pp. 3834–3843, 2010.
TABLE C.1 Silicon Steel Data
Material: M19 M36 M43 M47 Hiperco50r (kg/m3): 7402 7018 7291 7585 7845Bmxa(T): 1.39 1.34 1.39 1.49 2.07
TABLE C.3 Silicon Steel MSE Parameters (Bb = 1T, fb = 1 Hz)
Material: M19 M36 M43 M47 Hiperco50Gauge: 26 26 26 26 29Thickness (mm): 0.66 0.66 0.66 0.66 0.33r (mW-cm): 52 44 42 30 41kh (W/m3): 50.7 64.1 85.0 149 74.5a: 1.34 1.34 1.28 1.26 1.08b: 1.82 1.80 1.75 1.69 1.86ke(Am/V): 2.65�10−2 4.05�10−2 4.14�10−2 26.1�10−2 3.02�10−2
TABLE C.2 Silicon Steel mB�� Data
Material mr ak bk gkM19 32686 0.098611
0.00148230.0014350.001435
69.739731.949541162.27673.598553
1.3992.16191.24752.0377
M36 26673 0.225990.0431950.0311180.0043748
271.844397.3173842.294650.8058081
1.3506510
1.324155.38168
M43 24892 0.0728850.00395650.00254770.001
33.97431.141083.3794148.9292
1.41384.28489.99981.4731
M47 9875 0.0509190.039330.0010.001
18.0383920.612420.9336389115.8623
1.56133.37125.27151.3996
Hyperco50 43372 0.437080.00030680.000262790.00024516
17.133672.139356163.43481.476588
2.28361.36921.67723.494
444 APPENDIX C