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中低速磁浮车用单边直线感应电机的次级导电板通常由铝板构成,但由于机械强度等要求,所用的不是纯铝,而是铝合金。运用等效电路计算和有限元仿真的方法,探讨了直线感应电机在恒转差频率控制模式下,导电板电导率确定后如何选取合适的控制转差频率。分别以法向力在零附近和在恒功率阶段使磁浮车工作在推力最大值点作为选择最优转差频率的依据,得到了不同电导率下转差频率的最优配置。有限元仿真结果表明,根据次级电导率的不同,选择不同的控制参数能提高直线感应电机性能。
Secondary low-speed maglev motor with single-sided linear induction motor is usually composed of aluminum plates, but due to mechanical strength requirements, the use of not pure aluminum, but aluminum. By using equivalent circuit calculation and finite element simulation method, how to select the appropriate control slip frequency after determining the conductivity of the conductive plate in the constant slip frequency control mode of the linear induction motor is discussed. The optimum position of slip frequency under different conductivities was obtained by using the maximum working point of the maglev vehicle at the normal force near zero and at constant power as the basis for selecting the optimal slip frequency. The results of finite element simulation show that the selection of different control parameters can improve the performance of the linear induction motor according to the different secondary conductivities.