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This paper presents an analytical model for predicting the open-circuit, armature reaction, and load eddy current loss in the conductive retaining sleeve of surface-mounted permanent magnet machines accounting for slot opening and tooth-tips. The finite element results confirm the high accuracy of the developed model and the necessity of accounting for the slot opening. The load sleeve loss is equal...
Based on the subdomain field model accounting for tooth-tips, the eddy current losses in magnets are calculated for surface-mounted permanent magnet machines. The contributions of both self action of each harmonic and mutual interaction between field harmonics of different orders to magnet loss are accounted for in the developed model. It allows for predicting magnet losses due to the open-circuit,...
This paper aims to find effective methods to avoid irreversible demagnetisation in permanent magnet machines by suppressing the short-circuit current. An analytical model is developed to predict the transient currents, overcoming the problems of previous steady state models which may significantly underestimate the short-circuit current. Although the developed analytical model is simple, it can accurately...
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