Establishment and Development of Benchmark Family (P21)

Abstract

Testing Electromagnetic Analysis Methods (TEAM) Problem 21 (P21) was proposed by the author in November 1993 based on the industrial background of modeling stray-field loss in electrical equipment. Now, it has been extended to a TEAM Benchmark Family, including 5 sets of 16 member models, approved by the International Compumag Society (ICS). In the modeling and simulation of engineering electromagnetic field problems, it is necessary to properly deal with the nonlinear, anisotropic, and hysteretic behaviors of materials and components, multiply connected regions, multi-scale configurations, skin effect, and deep magnetic saturation behavior, etc., under standard (e.g., the excitation with sinusoidal waveform) and non-standard excitation conditions (e.g., when the excitation waveform contains higher harmonics and/or DC components). The confident validation of the modeling and simulation based on well-established benchmark models is certainly essential and challenging. This chapter briefly outlines the Problem 21-related benchmarking activities, the basic characteristics and the upgrade of the Problem 21 Family, the research on measurement and analysis method, and the model-based results. The significance of extending the scope of TEAM, establishing more realistic and challenging benchmark models, in combination with advanced material modeling, is emphasized. Further co-research projects related to Problem 21 Family are also proposed.