On the Temperature Rise of the Small Size and Single Phase Transformer(Ⅱ)

摘要

Temperature rise of the core-type and shell-type transformerhas been studied with the node analysis.Taking intoaccount the geometrical symmetry of the transformer，it is cutted into many of portions， the thermalresistor networks approach is used and govering equations aresolved by the numerical technique.On the other hand，three kinds of coil frame have beenexperimented in trial transformers，and the effects of heatconductivity in these coil frames were investigated for theheat exchange between the core and coil of transformers.Numerical results give good agreement with the experimentaldata of trial transformers.