Vector hysteresis modeling of ferromagnetic materials

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Vector hysteresis behavior of ferromagnetic materials plays a central role for the design and optimization process of electrical machines and magnetic actuators. Currently, practical issues, such as loss of performance of electromagnetic energy conversion devices due to demagnetization effects in permanent magnets, due to reduced servo-dynamics in magnetic actuators or due to iron losses in power electronics or rotating electrical machines, cannot be addressed using conventional material models or are investigated using rough approximations valid in restricted operation regions if at all.This project strives to integrate vector hysteresis models in finite element (FE) simulations aiming at an FE-based spatially resolved magnetic field and iron loss calculation without limitations with respect to operational conditions. Both primal and dual vector hysteresis models are integrated by the research and application partner Bosch into his in-house FE tool Edyson and finally validated by different practical case studies of increasing complexity (from one-dimensional to three-dimensional problems).Parallel to that work the IEM is able to integrate the vector hysteresis models into his in-house FE tool iMOOSE and to validate this extension through different practical case studies of increasing complexity (from one-dimensional to three-dimensional problems). Subsequently, this permits a cross comparison of both field calculation concepts.Whereas primal vector hysteresis models are based on preliminary work within the scope of the preceding DFG funded project and are therefore transferred to the industrial research partner Bosch, the possibly necessary advancement of primal vector hysteresis models as well as the construction of the dual vector hysteresis models are objects of the cooperative teamwork which takes place in the context of the requested transfer project.