Computerized magnetic test and evaluation of hysteretic materials [hysteresis motors]

Techniques are described which enable highly nonlinear hysteretic materials to be fully characterized. Major hysteresis loops and minor trajectories are presented for one particular material sample. Test time is reduced to less than 10s, ensuring that heating effects in the ring sample are negligible. The method is appropriate for detailed material investigation for design or development applications. It is recognized, however, that winding primary and secondary turns onto a ring sample, especially where toroidal winding machines cannot be use does not make this technique attractive for repetitive test applications.<>