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In the different size of magnetic gears, the present study views some factors as variable factors such as control the size of magnetic gears, number of poles, fill the yoke material, the thickness of the magnetic irons, the height of the magnetic irons, the relative distance and so on. By the finite element analysis and experiment's evidence, the present study finds out the position of the maximum torque happened goes to the highest and poles increases in the same time when magnetic ring scales increase. Also the present study find out the change of the scales has the significant on the yoke material and the change of the distance has the significant on the scales' change. In order to examine the effects above, the present study makes use of the Magnetic Analysis software-Magnet 5.2 ver. The present study is based on the finite factor analysis to build CAD model and use the finite factor analysis to get the solution. Also it is based on Maxwell stress force method and Virtual work method to get the maximum Torque, the direction of Bn' the magnetic size of Bt. The present study matches the result of the experiment to get the physics analysis. Meanwhile, it also builds a simple model to have the simple explanation of physical analysis. Finally, the present study get the optimum mechanism of this system and apply for the patent to protect.
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