DocumentCode :
2470681
Title :
Extraction of dynamic low order models for multiwinding magnetic devices based on finite element analysis
Author :
Qu, Liyan ; Chapman, Patrick L.
Author_Institution :
Ansoft Corp., Irvine, CA
fYear :
2008
fDate :
15-19 June 2008
Firstpage :
4611
Lastpage :
4616
Abstract :
It has been shown that model order reduction (MOR) methods can be applied to extract low-order dynamic models of magnetic devices from a high-order, finite element method (FEM) based model. The FEM-MOR technique provides a pure mathematical method without introducing any heuristic assumption in modeling magnetic devices, and the technique results in easy-to-simulate, physics-based models. Three Krylov subspace-based nonlinear MOR methods-the piecewise-linear steady state (PWL-SS), direct piecewise-linear (DPWL), and trajectory piecewise-linear (TPWL)-have been presented and applied to an example inductor model including saturation and hysteresis. Among three of them, the PWL-SS method has been proved to be the most effective and accurate. However, it was not shown effective yet for multiwinding cases since the one-to-one relationship between the linearized systems and the values of the winding current in single-winding cases is not valid any more. This paper extends the FEM-MOR technique to a multiwinding magnetic device, a two-winding transformer.
Keywords :
finite element analysis; magnetic devices; piecewise linear techniques; transformer windings; Krylov subspace-based nonlinear MOR methods; direct piecewise-linear; dynamic low order models; finite element analysis; linearized systems; multiwinding magnetic devices; piecewise-linear steady state; trajectory piecewise-linear; two-winding transformer; winding current; Circuit simulation; Circuits and systems; Equivalent circuits; Finite element methods; Magnetic analysis; Magnetic devices; Magnetic hysteresis; Mathematical model; Piecewise linear techniques; USA Councils;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
ISSN :
0275-9306
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
Type :
conf
DOI :
10.1109/PESC.2008.4592693
Filename :
4592693
Link To Document :
بازگشت