Abstract
This paper attempts to describe how finite element field analysis methods are being employed in the design of electrical machines. It discusses results and experience obtained from finite element analysis application to electrical machines-for linear and nonlinear electric and magnetic field problems-in order to gain useful design information from this numerical analysis tool. It presents various applications covering magnetic constants describing the air gap flux. Slot leakage, leakage path permeance evaluation, and the detailed studies of field distribution and its effects. This work produces design and performance data and computation tools which will help engineers to design highly rateo' electrical machines capable of meeting normal and abnormal operating conditions reliably and with economy.
Highlights
In order to ~Ji>.luate the per!ormanc~ ~ith precision, one must accurately and in detail predict the electroma9netic fie~ds produced ulwer various operating conditions
Finite element analysis results based upon the flux line boundary area subdivision will show negative values for the area 5 for small air gap to Siot pitch ratios reflecting the above mentioned fact
It is conCiuded that the difference be~ween the classical analysis anD finite element an~lysis is mainly found in the flux distribution in the slot opening area
Summary
In order to ~Ji>.luate the per!ormanc~ ~ith precision, one must accurately and in detail predict the electroma9netic fie~ds produced ulwer various operating conditions. S equivalent flux denslty ovec slot pltch real fluK density in the tooth slot width t , SJ.ot pitch ma9netic fIeld intensity perllleabi 1ity The finite element [lu~ distribution plots for the single slot model, at different levels of excitat10ns.
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