非线性磁场问题中涡流的高效计算
Efficient computation of eddy-currents for nonlinear magnetic field problems
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中文总结 AI 辅助
本文针对电气设备非叠层导电部件涡流损耗三维模拟成本高的问题，提出通过二维静磁模拟结合单个线性化时周期问题重构涡流反应场的方法，可在适度额外成本下提升损耗预测精度。
中文摘要 AI 辅助
估算电气设备非叠层导电部件的涡流损耗需要昂贵的三维模拟，因此实际中会采用多种近似方法降低早期设计阶段的计算成本。本文回顾了部分方法，讨论其建模假设与产生的近似，尤其指出涡流反应场是应全局考虑的重要贡献，该反应场可通过求解单个线性化时周期问题，从二维静磁模拟中近似重构；还探讨了求解该后处理问题的不同策略，数值结果表明，在适度额外成本下，其损耗预测相比标准后处理有改进。
英文摘要
Estimation of eddy-current losses in conducting non-laminated components of electrical devices requires expensive three-dimensional simulations. Various approximations are therefore used in practice to reduce the computational cost in the early design phase. We review some approaches and discuss their modelling assumptions and resulting approximations. In particular, we identify eddy-current reaction fields as a significant contribution that should be accounted for globally. These reaction fields can be approximately reconstructed from two-dimensional magnetostatic simulations by solving a single linearized time-periodic problem. We further discuss different strategies for solving this post-processing problem. Numerical results demonstrate improved loss prediction compared to standard post-processing at moderate additional cost.
