交流感应磁悬浮技术的研究

The Research on Technology of AC Induction Magnetic Levitation

基于电磁感应定律和励磁线圈与非磁性导体环间的等效电路模型,对处在交变磁场中的非磁性导体环受到的感应悬浮力进行了研究。非磁性导体环以铝环作为研究对象,提出了铝环受到感应悬浮力的测量方案,并设计了感应悬浮力的测量装置。对不同励磁线圈电流大小、电流频率、铝环相对线圈端部位移等参数条件下铝环受到的感应悬浮力进行了试验研究,并且利用有限元软件ANSOFT对各参数下的感应悬浮力进行了仿真分析。仿真和试验结果表明:铝环受到的感应悬浮力与电流的平方近似成正比关系;当励磁线圈电流频率大于50Hz时,增加线圈电流的频率,感应悬浮力的变化不明显;随着铝环和励磁线圈相对位移的增加,铝环受到的感应悬浮力明显减小。

Based on electromagnetic inductive law and equivalent circuit model of magnet exciting coil and non-magnetic conductor ring,induction levitation force has been done on the ring which is in the alternating magnetic field.Non-magnetic conductor ring with aluminum ring as the research object,the principle to measure the induction levitation force of the aluminum ring is proposed.According to the principle,a measure ring is designed.Simulation analysis of ANSOFT and experimental analysis has been done on the induction levitation force of aluminum ring for different excitation coil current size,current frequency and the distance between aluminum ring and excitation coil.The result shows that the induction levitation force of aluminum ring is proportional to the square of the current;the increase of induction levitation force is not obvious by increasing the current frequency when the frequency is more than 50Hz;the induction levitation force decreases obviously with the distance between aluminum ring and excitation coil is increasing.