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Use of Thermal Network on Determining the Temperature Distribution Inside Electric Motors in Steady-State and Dynamic Conditions

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5 Author(s)
Yabiku, R. ; GEVISA GE Motors, Campinas, Brazil ; Fialho, R. ; Teran, L. ; Ramos, M.E.
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This paper outlines a set of useful calculations and design guidelines for motor temperature rise prediction. The steady-state analysis is presented, allowing a general view about the expected temperature rise in the stator winding. For transient conditions, the starting and stall phenomena are modeled considering the factors that are often neglected: the skin effect and the heat exchange from the bars to the tooth. The end ring temperature rise is assessed. The accurate temperature rise calculation is critical for several reasons: to control the peak temperature for hazardous locations, to predict the fatigue under the heating-up and cooling-down processes, to calculate the number of consecutive starts, and to establish a safe stall time.

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Industry Applications, IEEE Transactions on  (Volume:46 ,  Issue: 5 )