次级断续与初级横向偏移时直线感应牵引电机的电磁特性与防冲击控制

Linear induction traction motors with discontinuous secondary and asymmetric primary for the metro are investaged by the electromagnetic analysis, characteristics calculation for the motor, FEM and nonlinear control. Firsltly, the electromagnetic analysis model, which can consider the coil current of the primary and eddy current in the secondary, is proposed, and electromagnetic characteristics of the linear induction motor is obtained. The electromagnetic analysis model can consider the relation of the cogging and eddy cueent, as well as the structure varition of the motor can be given accurately.Secondadly, the spectrum distributions in the primary current is applied for estimated the discontinuous secondary and asymmetric primary.Thirdly, multi-linear control systems are design by the subsection linearization theory, and the coordination of multi-linear control systems works by the eatimation of the motor structure.Then, the impact of the thrust and primary current can be controlled, as well as the passenger comfort is improved and the wheel wear reduced..The theoretical foundation for the application of linear induction traction motor in the more complex urban environment is presented in this projiect.

以直线电机城市轨道交通列车为背景，依据电磁场计算、电机分析、有限元技术与非线性控制，在次级线路铺设不连续与初级横向偏移的前提条件下，探索直线感应牵引电机的电磁特性与防冲击控制。内容：[1]提出以初级单个线圈电流和次级涡流回路为自变量的电磁模型，探索不同程度次级断续和初级横向偏移时，电机的特殊电磁机理。该方法能够描述单个齿槽和次级涡流回路的电磁耦合关系，全面和准确的表征初级和次级的结构变化。[2]建立初级电流频谱特征与不同次级断续和初级横向偏移的映射关系，通过对特征电流参量在线观测，明确电机具体电磁耦合情况，实现对电机结构变化的在线识别。[3]依据分段线性空间理论设计多个线性控制系统，配合电机结构在线识别，完成多个控制系统的协调工作，抑制电机结构突变造成的牵引力和电流冲击，提升旅客舒适性以及减少轮对不规则磨耗。. 项目为直线感应牵引电机在更复杂城市线路环境的应用奠定理论基础。

在城市轨道交通列车的背景下，探索初/次级横向偏移时直线感应牵引电机特性、次级缺失时电机暂态特性和特殊工况下直线感应牵引电机防冲击控制等关键科学问题，具体内容：[1] 提出初级等效电流层密度横向分布模型，考虑初级绕组端部与次级伸出缘的耦合关系，建立初/次级横向偏移时三维电磁模型，为研究初级横向偏移工况的电机特性提供理论基础; [2] 提出次级缺失工况下直线感应电机的三维暂态电磁模型，研究了不同速度和缺失距离时电机特性的变化规律，为列车稳定性的提升和轮对磨损的减少提供分析手段; [3] 依据分段线性空间理论设计多个线性控制系统，配合电机结构在线识别，完成多个控制系统的协调工作，抑制电机结构突变造成的牵引力和电流冲击，提升旅客舒适性以及减少轮对不规则磨耗。