[Back]

L. Mehnen, G. Krismanic, C. Krell, H. Pfützner:
"2D Magnetization control by means of evolutionary algorithms";
Poster: 2DM 1&2 Dimensional Magnetic Measurement and Testing, Bad Gastein, Austria; 2000-09-20 - 2000-09-21; in: "2DM 1&2 Dimensional Magnetic Measurement and Testing", (2000), ISBN: 3-902105-00-3; D9.

The paper concerns the problem of defined simulation of multidirectional magneti¬zation patterns B(t) of laminated soft magnetic materials performed (i) to investigate the corres¬pondences between field H, induction B and mechanical stress, as being relevant for magnetic sensors, and (ii) the determination of energy loss as being relevant for electric machi¬ne cores. Attempts were made to control B(t) of samples magnetized by a 3-phase excited rotational single sheet tester (RSST) by means of so-called evolutionary algorithms based on random number variations of excitation voltage amplitudes synthesized by a simple sound blaster card. For highly grain oriented SiFe, the method proves to be time consuming. However, it offers fundamental studies which illustrate the very high physical significance of the angular velocity of rotational magnetization. On the other hand, the method allows routine investigations of non-oriented SiFe as well as of amorphous ribbons. For example, multi¬directional consequences of stress can be studies in a rapid way which yields significant information for the design of magneto-mechanical sensors.