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R. D. Findlay B. Szabados S. Spencer Power Reasearch Laboratory McMaster University S. Lie Westinghouse Motor Co. Canada Ltd. R. Belmans Laboratory for Electrical Machines Katholieke Univeriteit M. Poloujadoff Université de Paris |
Some Comments on Flux Patterns and Heating Effects in Two Pole Induction MotorsThis paper addresses the problem of magnetic flux variation and the development of local hot spots in the rotors of vent cooled, two pole induction machines. The solution to this problem is important, not only to reduce stray losses in such machines, but also to identify the location of hot spots to estimate their effects on the design. A second objective behind the research was to reduce the magnitudes and, as a result, the variations in shaft magnetic fluxes. Reducing shat fluxes will result in reduced shat failures due to fatigue that is exacerbated by repeated heating and cooling. A procedure is suggested for examining the effects of the placement of the vent holes on the flux variations, especially in the shaft, and for determining the local heating effects. |
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