中文摘要：

对永磁耦合器涡流损耗功率进行了分析,根据电磁感应及能量守恒定律得到涡流损耗与其影响因素的关系,通过有限元仿真分析了稳定运行及过载状态下永磁耦合器的温升情况。结果表明,在相同负载的条件下,气隙厚度增加、导体盘电阻率增大、铜盘厚度减小都会导致涡流损耗增加;对于40 kW矿用永磁耦合器,使用自然风冷方式可以满足300 N·m以内负载的散热要求;过载情况下,永磁耦合器的永磁体会在45 s内达到居里温度并造成永久损坏,应及时关闭电机。

英文摘要：

In the article, eddy current loss power of permanent magnetic coupling is analyzed, according to the principle of electromagnetic induction and the law of conservation of energy, the relationship between eddy current loss and its influence factors is obtained; the stable running state and overload state temperature rise of the permanent magnet coupler is analyzed by finite element simulation. The results show that under the same load conditions, the increase of air gap thickness and the conductor resistivity, the decrease of copper thickness will cause the increase of eddy current loss; for the 40 kW mine-used permanent magnetic coupling, natural air cooling mode can meet the cooling requirements of torque load less than 300 N·m,under the condition of overload, permanent magnetic coupling will rise to Curie temperature in 45 sand and cause permanent damage, motor should be closed in time.