根据前人的研究，改良实验装置并分析电流的流向、温度对磁铁的影响，研究圆柱形电池以及吸附在其两端的纽扣磁铁（永磁体）组成的同极滚轮. 研究发现，当同极滚轮放置在铝箔上时，两端磁铁半径相同与不同时各自会产生不同的运动现象. 基于简化动力学理论分析滚轮的运动过程，运用仿真与实验结合得出半径相同时位移随时间变化的关系，半径不同时磁铁半径与磁铁运动半径的关系. 

On the basis of existing experiments, we improve the experimental device and analyzed the influence on magnets that was exerted by the current flow direction and the temperature. Meanwhile, we have observed the cylindrical battery and the homo-polar roller which was composed by the button magnets (permanent magnets) absorbed at both ends. It is found that when the homo-pole roller is placed on the aluminum foil, the magnets with same or different radii at both ends lead to disparate movement phenomena, respectively. We analyze the roller’s moving course on the foundation of simplified dynamics theory and obtained the relationship between the displacement and time with the same radius as well as the relationship between the magnet radius and the magnet moving radius with different radius by combining the simulation and experiment.