An accurate representation of the magnetisation curve including the incremental permeability curve, is presented. It is based on selected powers of B (not generally integer) with positive coefficients giving a power series. The fit is shown to be superior to those obtained with polynomial and rational fraction polynomial representations.
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References
1.
WidgerC. F. T., ‘Representation of magnetisation curves over extensive range by rational fraction approximations’, Proc IEE, 116, No. 1, pp. 156–160 (Jan. 1969)
2.
MacfadyenW. K., ‘Representation of magnetisation curves by exponential series’, Proc IEE, 12, No. 8, pp. 902–909 (Aug. 1973)
