The analytical design is via a straightforward procedure involving solution of the magnetic circuit bith by linear and non-linear methods. The electrical circuit is calculated using a simple L-R-C (LRC) circuit solution and is plotted. The peak current is used to determine the magnetic fields via analytical methods. The inductance of the magnetizing fixture is calculated using slot geometry.

L-R-C circuit solution using Vs and capacitance 'C' of the magnetizer. Reverse current blocking diode has been enabled.

The magnetic fields in various parts of the fixture namely the stator, rotor, magnet, and air gap are calculated using the reluctance of each section and the peak current as the driving force.  Linear and non-linear calculations are made. The linear calculations give a best case scenario with the reluctance of all paths in steel assumed to be zero. The non-linear calculations take into account the actual steel BH data. Different results are obtained depending on the flag "Enable spline extrapolation". If this flag is enabled, the values for H and hence mu are obtained by extrapolating the BH data when the computed value of B is larger than the available data for the chosen material. If this flag is disabled, the maximum value is clamped and always used when computed B is larger. An iterative procedure is used until the source MMF equals the MMF drops in various parts of the circuit.

For magnetizing fixture design both by analytical means and using finite-element methods, the quality of the BH curves determine the quality of the results. Most of the BH data available are suited for electric motor design where the flux density rarely exceeds 1.5-2.5 T. But in magnetizing fixtures using steel, it is common for the flux density to reach much higher levels. Typically BH curves that show the relationship between B and H up to a value of B approaching 5 T should be used. Even higher values will provide more accurate results, but this kind of data is hard to find from any electric steel manufacturer.