Modelling hysteresis of soft core materials using permeance-capacitance analogy for transient circuit simulations

Abstract

Magnetic components using soft core materials are widely used in power electronic converters. The hysteresis effect of the material leads to power loss and harmonic distortion. If this effect can be modeled in system-level time-domain simulation, the performance of the magnetic component in combination with power converters can be predicted more accurately during the design phase. This work proposes an approach to model the hysteresis effect of soft magnetic materials in magnetic circuits based on the permeance-capacitance analogy.

Modeling Frequency Independent Hysteresis Effects of Ferrite Core Materials Using Permeance–Capacitance Analogy for System-Level Circuit Simulations

“…With the proposed reversible component included, if the irreversible component is calculated using Cauchy-Lorentz PDF (adopted by [12]) whose parameters are identified following the same procedure described in section III-A, the hysteresis loops with field strength amplitude of 100A/m (limiting loop) and 60A/m are compared to the measurement in Fig. 14a and Fig.…”

“…Authors of [9] proposed Cauchy-Lorentz PDF for the distribution function p s , which was further applied by the work of [10], [11] and [12] for modeling of soft magnetic materials. A parameter identification scheme using genetic algorithm has been presented in [13].…”

“…The reversible component is essentially a single-lined B − H characteristic, for which the inverse trigonometric (arctan) function proposed by [24] and hyperbolic cotangen (coth) function by [25], [26] have been adopted by [12] and [22], respectively. This work will still follow this methodology but a new fitting function is chosen for the reversible component, which provides additional degrees of freedom so that the equivalent permeability can be better controlled.…”

Permeance based modeling of magnetic hysteresis with inclusion of eddy current effect

“…Following the approach proposed in the work of [12], the nonlinear permeances depending on field strength H are provided as the summation of an irreversible component P irr k and a reversible component P rev k , scaled by the geometrical parameters of the individual sublaminates (∆h k , w and l in Fig. 3a).…”

“…Magnetic circuits based on permeance-capacitance analogy introduced by [8] are able to represent complex core geometry intuitively, and have been proved to be practical for system-level circuit simulation in the work 978-1-5386-1180-7/18/$31.00 ©2018 IEEE of [9], [10] and [11]. The magnetic hysteresis of soft material can be accurately captured via incorporating Preisach model [12]. Thanks to its gyrator structure to interface the electrical part of the model, the magnetic circuit can be simulated in its original form directly.…”