深槽鼠笼异步磁力联轴器瞬态气隙磁场有限元分析

为得到深槽式鼠笼异步磁力联轴器工作时的扭矩变化情况,对其瞬态气隙磁场进行了模拟研究.基于对磁力联轴器的瞬态理论分析,借助Ansoft对影响深槽式鼠笼异步磁力联轴器瞬态气隙磁场的主要因素:永磁体磁极数、永磁体厚度、气隙厚度、内转子槽数以及槽的长宽比(槽深与槽宽的比值)进行了二维和三维模拟分析,并通过试验验证了三维模拟分析的正确性.结果表明:在一定的外形尺寸条件下,取磁极数为14极,永磁体厚度为8 mm,槽数为24槽,槽的宽长比0.42时,输出转矩达到最优；在宽长比中槽深对转矩值的影响较为显著,当槽深为18 mm时,达到最大输出转矩.该结果对深槽式鼠笼异步磁力联轴器的进一步优化具有指导意义.

Finite element analysis of transient air gap magnetic field for deep bar squirrel cage asynchronous magnetic coupling

To investigate output torque of deep bar squirrel cage rotor asynchronous magnetic coupling in working,the transient air gap magnetic field was simulated.Based on the transient theoretical analysis of asynchronous magnetic coupling,the effects of magnetic pole numbers,permanent magnet thicknesses,air gap lengths,slot numbers of inner rotor and width-length ratios of slot(the ratio of the slot width and the slot depth)on the transient air gap magnetic field were analyzed by 2D and 3D simulation in Ansoft Maxwell.The experiments were conducted to verify the 3D simulation analysis.The results show that the optimal value of output torque can be oabtained in a certain outside diameter with magnetic poles of 14,permanent magnet thickness of 8 mm,slot number of 24 and slot width-length ratio of 0.42.The output torque is markedly affec-ted by slot depth with maximum torque for slot depth of 18 mm.The conclusions have guiding significance for further optimizing of deep bar squirrel cage rotor asynchronous magnetic coupling.