Measurement of Asymmetric Minor Loops in Soft Ferrites Up to Medium Frequencies

An accurate measurement of the hysteresis cycle of magnetic cores is a crucial step in its characterization, due to its nonlinear and past-dependent effects over a design. These effects must be taken into account in order to satisfy the requirements of a power electronic design. In a previous paper, the authors proposed a method for measuring major loops of hysteresis cycles up to medium frequencies given the limitation of the classic method when increasing frequency. In this paper, the capability of this method in measuring non-symmetric loops of the hysteresis cycle at medium frequencies is discussed. Simulated and experimental results are provided.