High-frequency transformers are key equipment for power conversion devices such as energy routers and photovoltaic inverters

encountering complex transient conditions. To establish an accurate electromagnetic transient model for high-frequency transformers

it is essential to simulate the dynamic hysteresis characteristics of the core precisely. First

This paper integrates the permeance-capacitance analogy method with the Energetic hysteresis model in the power electronics simulation software PLECS

constructing a static hysteresis permeance model of the core

representing the static hysteresis effect. Secondly

based on the static hysteresis permeance model

and in accordance with the principle of loss separation

magnetic resistance and controlled magnetomotive force sources are introduced to characterize the dynamic loss components of eddy current loss and residual loss in the iron core

and a dynamic hysteresis permeance model of the iron core is constructed. Then

based on experimental measurement data under different operating conditions

combined with the principle of loss separation and field separation technology

static hysteresis loops are calculated at various frequencies. The variation law of static model parameters with frequency is derived

and the characteristic parameters of the dynamic hysteresis permeance model considering the frequency effect of static parameters are obtained. Finally

the simulation results and experimental measurement results of the proposed model under sinusoidal and variable duty cycle square waves with different frequencies and magnetic densities are compared and analyzed to verify its effectiveness.