| Summary: | 碩士 === 國立中興大學 === 精密工程學系所 === 97 === To enhance precision and to increase the speed of machine tools, linear motors have been broadly applied to machine tools in recent years. However, heat generated inside the linear motor can usually has the degree higher than 100℃.This may cause thermal damage in products and reduce performance of the motor itself. Therefore, to understand the heat problems of linear motor is one of the most important issues in modern manufacturing technologies.
In this paper, the thermal characterization of a linear motor had been studies to analyze the temperature distribution during operation using two essential methods. One is the thermal resistance method, another is the finite element method. In addition, the CFD analysis on linear motor is calculated with respect to natural and forced cooling using of finite element method. Also, the motor’s heat loss conditions include the copper loss, eddy current loss and hysteresis loss had been discussed. The results compared with the previous experiments show the discrepancy did not exceed 3 ℃. and the comparison between thermal resistance and the finite element method analysis shows the discrepancy did not exceed 2 ℃.
In conclusing, the use of thermal resistance model can achieve as accurate as finite element method for the heat transfer behavior analysis of linear motor and agree with experiments. Both methods provide useful information for thermal behavior of linear motor application for modern manufacturing.
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