NDLI: Capabilities of finite element analysis and magnetic equivalent circuits for electrical machine analysis and design

Content Provider	IEEE Xplore Digital Library
Author	Yilmaz, M. Krein, P.T.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL (Yilmaz, M.; Krein, P.T.)
Abstract	This paper reviews the literature concerned with capabilities and limitations of finite element analysis (FEA) and magnetic equivalent circuit (MEC) analysis for electrical machine design. The most common known models are based on equivalent circuits and related analytical models, or on FEA. Analytical models use highly simplified magnetics, and have difficulty extending into saturation. FEA typically uses magnetic vector potential representations that model additional effects such as eddy currents, but requires detailed nonlinear models for saturation and hysteresis. MEC methods represent a third possibility for electrical machine analysis, based on permeance network models comprising reluctances and mmf sources. Advantages of the MEC method include reduced model complexity compared to FEA, enhanced accuracy compared to analytical approaches, ease of parameterization, methods for extension to 3-D capability, and fast computation time. One of the most significant concerns related to literature in this area is that very few papers report thorough comparisons between experimental measurements and simulation tools for electromechanical devices. Among those that do, even fewer compare electromechanical forces and torques. With less than 15 exceptions, the few papers providing such comparisons report ldquogood agreement, rdquo but in fact show errors of 10% or more between tests and simulations. Many papers with experimental results do not compare torque or force results or present error analysis. This is most unfortunate, as many authors deen to consider FEA results ldquodefinitiverdquo and use them as a basis for model comparisons. Saturation and iron losses appear to be the likely culprits. In a few papers, the reported analysis method takes full nonlinear magnetic effects into account. When magnetic saturation, eddy currents, hysteresis losses, and similar effects are modeled with care and in detail, differences between simulations and experiments typically are on the order of 5%.
Starting Page	4027
Ending Page	4033
File Size	204342
Page Count	7
File Format	PDF
ISBN	9781424416677
ISSN	02759306
DOI	10.1109/PESC.2008.4592584
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computational modeling Torque Analytical models Magnetic hysteresis Integrated circuit modeling Saturation magnetization Force
Content Type	Text
Resource Type	Article

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