Research On Detent Force And Temperature Field Of Axial Flux Permanent Magnet Linear Synchronous Machine

With the improvement of industry, the decrease of resource, and the deterioration of environment, most of fields call for the machines that are with high efficiency, low ejection, and so forth. In such cases, Stirling engines become more and more popular in ordinary life, because of the superiority on the rate of using resources, on the comprehensive source of fire material, and on the low ejection of polluted air. This paper focuses on the linear machine, based on the background of Stirling engine application.In this paper, a linear machine model, meeting the need of engineering, is completely designed. Using the finite element method (FEM), the model has been analyzed. Meanwhile, to the problems, like a higher detent force, and a higher force fluctuation, appear in the research, some of methods have been put foreword.On the bases of theory analysis, several other models are set up, so as to make sure whether the methods proposed are effective and feasible. The reality is that to use the methods of changing the thick and the length of the end stator tooth, the rate of poles and slots do decrease the force given by end tooth and the inner tooth. Moreover, the methods can effectively alleviate the detent force fluctuation.Additionally, the thermal problem, happened in this linear machine, has been researched. During the analysis, two equivalent methods using for calculating the convection of slot are proposed. With the simulation of temperature field, the accuracy of the two methods has been proved. In the meantime, it is proved that this model would run under the limited temperature steadily.Finally, a prototype of the linear machine has been produced and tested. To the problems happened in the test, several settlements are proposed in this paper.