鼠笼异步磁力联轴器隔离套的损耗计算及温度场分析

Loss Calculation and Analysis of Temperature Field of the Isolation Units in Squirrel-Cage Asynchronous Magnetic Coupling

为得到鼠笼异步磁力联轴器隔离套工作时的损耗,利用等效面电流法对其空间磁场动态分布进行了分析研究,并通过麦克斯韦时变方程对鼠笼异步磁力联轴器中隔离套的损耗进行了理论推导。在理论分析的基础上,使用ANSYS有限元分析软件对联轴器进行了温度场分析,得到了联轴器整体温度场分布情况、各部件的温度分布情况以及径向方向上的温度分布曲线。结果表明,隔离套最高温度为116.710℃,最低温度是114.690℃,温度变化很小,内侧的温度较高,外侧的温度较低。永磁体靠近外气隙的内侧温度最高为66.604℃,而外侧温度则最低为62.199℃,远未到达危险温度,故可保证永磁体的正常工作。分析结果对大功率的磁力联轴器的温度研究具有一定的指导意义。

In order to obtain the loss calculation of the isolation units in squirrel--cage asyn- chronous magnetic coupling, the dynamic distribution of the spatial magnetic field is analyzed through equivalent surface current method and loss calculation of isolation units is obtained by Maxwell equa- tion. On the basis of theoretical analysis, the temperature field is analyzed by using ANSYS, therefore the global temperature distribution and radial temperature distribution curves of squirrel--sage asyn- chronous magnetic coupling are obtained. The results show that maximum temperature of isolation u- nits is 116.71℃ and the minimum temperature is 114. 69℃. The difference between max and min is small, the one inside has higher temperature and the outside is lower. The side of permanent magnet near the outer air gap has the maximum temperature 66. 604℃, however, the other one has the mini- mum temperature 62. 199℃. The temperature of the magnet is far away from dangerous temperature. So it ensures that the permanent magnet can work normally. The results have a guiding significant meaning for the temperature field analysis of the high power squirrel--cage asynchronous magnetic coupling.