Magnetic coupler is a kind of transmission device that uses magnetic field to transfer torque. As its active rotor and the driven rotor of the magnetic coupler are non-contact connection, magnetic coupler has the advantages of overload protection and stable transmission and it is used more and more in industrial production. Therefore, it is of great practical significance to perform the theoretical research on the factors which influence the transmission torque of magnetic coupler. By using finite element analysis simulation software ANSYS to establish the 3D simulation model, magnetic field distributions in the air gap of end face magnetic coupling with two layer magnetic sources have been studied and the effects of the radial length between the inner magnet and outer magnet, the axial thickness and the radial length of permanent magnet on the magnetic torque of end face magnetic coupling with two layer magnetic sources have been obtained. The results show that the magnetic torque of end face magnetic coupling with two layer magnetic sources increases with decrease in the radial length between the inner magnet and outer magnet. Its magnetic torque increases firstly and then keeps stable with the increase in the axial thickness and the radial length of permanent magnet.%磁力耦合器是一种利用磁场间相互作用传递转矩的传动装置.由于磁力耦合器的主动转子和从动转子是非接触式连接,故具有过载保护、传动平稳等优点,并在工业生产中得到越来越多的应用. 因此 , 对磁力耦合器传递转矩的影响因素进行理论研究具有十分重要的现实意义. 本文使用有限元分析仿真软件 ANSYS 建立二级磁源端面式磁力耦合器的三维模型, 对二级磁源端面式磁力耦合器气隙内磁场的分布进行研究,得到了二级磁源端面式磁力耦合器的磁转矩与内外圈永磁体径向距离、永磁体轴向厚度以及径向长度的变化规律. 结果表明:二级磁源端面式磁力耦合器的磁转矩随着内外圈磁体径向距离的减小而增大;磁转矩随着永磁体轴向厚度以及径向长度的增大先增大后趋于稳定.
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