Dynamic B-H Curves of Magnetic Materials Under Magnetic Switching Transients

The characteristics of a ferrite core saturating inductor under capacitive discharge were investigated both theoretically, with the use of computer modeling techniques on a HP-85 microcomputer, and experimentally on an actual ferrite core inductor. To correlate the modeling technique with experiment, the voltage across and the current through the ferrite core inductor under capacitive discharge excitation were measured. Since the magnetic flux density and field strength can be determined from these measurements, a dynamic trajectory of the magnetic flux density as a function of the magnetic field strength for the ferrite core was made. The data from this dynamic B-H curve was fed into an HP-85 microcomputer and the model generated hysteresis energy and power plots as a function of time. These plots agreed well with the measured data except for a small discontinuity in the theoretical plots due to the piece-wise linear approximation used in modeling. See also ADM002371. 2013 IEEE Pulsed Power Conference, Digest of Technical Papers 1976-2013, and Abstracts of the 2013 IEEE International Conference on Plasma Science. Held in San Francisco, CA on 16-21 June 2013. U.S. Government or Federal Purpose Rights License.