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Krylov-subspace based model order reduction for field-circuit coupled systems

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3 Author(s)
Nabi, M. ; Dept. of Electr. Eng., Indian Inst. of Technol.- Delhi, New Delhi, India ; Bazaz, M.A. ; Guha, P.

Simulations of coupled circuit-electromagnetic systems require heavy time-stepping computations often involving several thousand time-varying variables in the finite element (FE) models. However, in most cases, the actual dynamics of interest are between only a few of the variables, for which model reduction strategies based on Krylov subspace projection provide a promising alternative. They often drastically reduce computation time while reproducing practically the same dynamics between the variables of interest. Moreover, the time-evolution of the many other variables can also be recovered easily whenever required with reasonable accuracy. Based on this, a modeling and simulation strategy is presented for coupled field-circuit systems, involving a two-stage model reduction process. It significantly extends an earlier reported approach. Numerical results are presented for a generic field-circuit system with promising results, illustrating the performance of the strategy compared to conventional FE time-step computations.

Published in:

Circuit Theory and Design, 2009. ECCTD 2009. European Conference on

Date of Conference:

23-27 Aug. 2009