双边直线感应电机法向力与水平推力的气隙耦合分析

摘要

Decoupling of normal force and thrust via gap in double-sided linear induction motor is stu-died at first.The multilayer model of double-sided linear induction motor is established according to the multilayer electromagnetic theory.Then normal and tangential magnetic fields are derived.Nor-mal force and thrust are calculated by Maxwell stress tensor method and the curves of electromagnetic force characteristics vs.gap offset and slip are obtained.Simulation combined with motion equations is conducted to find disciplinarian of electromagnetic force characteristics vs.gap offset.An experi-ment is carried out in a high power linear accelerator platform at last.The result shows that the se-condary oscillates in the gap,which conforms to the theory analysis.%首先，采用多层电磁场理论建立了双边直线感应电机的多层简化模型，推导了法向和切向磁场的表达式；然后，运用麦克斯韦应力张量法计算了法向力和水平推力，得到了电磁力的气隙-转差率特性曲线，并结合运动方程进行仿真，分析了法向力和水平推力随气隙偏移变化的规律；最后，利用大功率直线加速平台进行试验验证，试验结果表明：动子在气隙内发生了振荡运动，振荡特征与理论分析吻合较好。