This paper deals with the heat generation influence of motor and the effect of shaft-bore cooling on a motor integrated spindle.With respect to the temperature distribution of spindle interior,the results of FEM heat conduction analysis and heat flow calculation agreed with the measurement of rotating test.Therefore according to the estimate on the influence of motor heat generation and the effect of shaft-bore cooling for temperature distribution and heat transfer, the preload increment and displacement, can be calculated more accurately.
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Nakamura et al. (1994) studied this question.