MagWeb Database

MagWeb database is a compilation of  1267 digital B-H Curves  and core loss curves of almost all known soft magnetic materials.  The database covers a broad range of permeability from  10 to 10,000.  High permeability magnetic materials such as Electrical Steel, Metglas are mostly available as thin lamination sheet. Medium permeability materials such as mild steel, stainless steel and casting are available as machinable bulk solids such as round, wire, bar, slab or plate.  Low permeability materials such as powder cores are available as  nonmachinable solids.   BHmag database presents magnetic properties of  all these materials.  So it is useful in the design of diverse electrical equipment such as electric motors,  wind generators,  transformers, solenoids, inductors, relays etc.

MagWeb database lists the Magnetization curve, Permeability curve and Core Loss Curves of  almost all soft magnetic materials.   Each file contains tabulated data and B(H) curve or Core Loss curve.  The data preserve the nonlinearity inherent in the B(H) curves.   It also lists the manufacturer,  thickness and frequency and the annealing condition at which the magnetization curve is measured.  

1.1          MagWeb Folders

The MagWeb database  contains 12 folders. Each folder refers to a specific material category.  Each folder contains a digitial B-H Curve or core loss curve and lists a table of values of specific points on the curve.

Table 1. MagWeb Folders  on Magnetic Materials (1267)


Category MagWeb Folder B(H) Curves Core Loss Curves Total Files
A Electrical Steel – Non Grain Oriented 293 116 409
B Electrical Steel – Grain Oriented 141 134 275
C Metglas & Nanocrystalline 23 10 33
D Cobalt Steel 28 12 40
E Nickel Steel 64 22 86
F Stainless Steel 34 0 34
G Low Carbon Steel 89 1 90
H Castings 29 0 29
I Iron Powder Core 49 26 75
J Alloy Powder Core 28 43 71
K Ferrite 51 7 58
L GHz Ferrite 0 67 67
  Total Files in MagWeb Database 829 438 1267

The user can easily integrate the database into any commercial software used to design Electric Machines.. Such integration relieves the designer the burden of selecting a trial magnetic material, collecting B-H curves, normalizing them into standard units, digitizing them and manually entering the data into the software, designing the electric machine and repeating the tedious process with another material. A design software with built-in MagWeb database can be used to quickly run the “what-if” simulations to analyze how change of materials affects the performance of machines. With few clicks, the designer can change a magnetic material and evaluate the impact of changed material on the performance.  Such fast what-if simulations greatly reduce the time for selection of optimal magnetic materials, significantly reducing the design cycle time.

1.2          User Manual

MagWeb database is supplied with a comprehensive User Manual when the digital curves are purchased online. The user manual contains more detailed information on the database format, magnetic saturation and quality of digitization and other useful information.