Magnetization Curves

. This quality of iron is best shown by the curves of Fig. 89, which illustrate the degree of magnetization set up in various kinds of iron by different magnetizing forces. In these curves the ordinates represent the total magnetization B , while the absci as represent the magnetizing force H . It is seen from an inspection of these curves that as the magnetizing force H increases, the intensity of flux also increases, but at a gradually le ening rate, indicating a reduction in permeability at the higher densities. These curves are also instructive as showing the great differences that exist between the permeability of the different kinds of iron; and also as showing how, when the magnetizing force becomes very great, the iron approaches what is called saturation , that is, a point at which the further increase in magnetizing force will result in no further magnetization of the core. From the data of the curves of Fig. 89, which are commonly called magnetization curves , it is easy to determine other data from which so-called permeability curves may be plotted. In permeability curves the total magnetization of the given pieces of iron are plotted as absci as, while the corresponding permeabilities are plotted as ordinates. IMG:384091999325875926_fig089_t.gif.png:Illustration_ Fig. 89. Magnetization Curve Fig. 89. Magnetization Curve View full size illustration.