Two-dimensional hysteresis modelling and loss evaluation in magnetic circuits

In this paper a two-dimensional hysteresis model is presented. The model may be considered as a superposition of two unidirectional mechanisms and one rotational mechanism of assigning the magnetic moment. In the unidirectional mechanisms the magnetic moment switches irreversibly between two opposite directions, but is free to rotate reversibly in response to a perpendicular magnetic field. In the rotational mechanism the magnetic moment switches reversibly into any in-plane direction. As an example, the model is used to preview the hysteresis losses in a transformer core.