垂直运输系统用高推力密度双侧永磁式横向磁通直线电机研究

采用直线电机直接驱动的垂直运输系统具有系统效率高、提升速度快、提升高度无限制、空间利用率高等显著的优势和广阔的应用前景。针对垂直运输系统用直线电机所需满足的低速高推力密度等要求，本项目提出一种新型横向磁通直线电机。该电机将励磁永磁体放置于初次极两侧，通过独特的磁路设计有效增大交链绕组的永磁磁通，在电机体积和永磁体用量相近前提下提高电机的推力密度和空间利用率。本项目围绕该电机展开相关研究工作：运用等效磁路法、子域解析法、等效磁网络法等理论建立该电机精确的电磁模型；研究该电机定位力及推力波动的抑制方法；研究结构参数对电磁性能的影响规律及多目标优化方法；研究该电机在多物理场耦合约束条件下设计方法；研究该电机驱动控制系统；最终搭建样机测试平台并完成验证。本项目将形成一套针对该新型结构直线电机的基础理论体系和实用设计方法，为横向磁通直线电机在垂直运输系统的广泛应用提供有益参考。

Vertical transportation system driven directly by linear motor usually has significant advantages, e.g., high system efficiency, fast lifting speed, unlimited lifting height, high space utilization rate, which shows a great application prospect. In order to satisfy the requirements of excellent low-speed performance and high thrust-density for the linear motor applied in the vertical transportation system, this project proposes a novel bilateral permanent magnet excited transverse flux linear motor(BPM-TFLM). The permanent magnets are listed on both primary and secondary of the proposed BPM-TFLM. Benefited from a unique flux circuit design, the PM flux cross-linked with winding is significantly increased without increasing the total motor vlolume and PM usage, meanwhile, the thrust density and the space utilization ratio are both improved. This project conducts the related research work of the BPM-TFLM: the precise electromagnetic model of the motor is established by using the theories of equivalent magnetic circuit method, subdomain analysis method, equivalent magnetic network method; the suppression methods of slot-tooth detent force, end effect detent force and thrust ripple of the machine are investigated; the influence rules of main structure parameters on the electromagnetic performances are analyzed, and the multi-objective optimization method is investigated; the design method of the motor under multi-physical field coupling constraints is studied; the driven system of the motor is designed; a prototype test platform is set up, the experiments are completely carried out to verify the accuracy of foregoing theoretical analysis. Finally, this project will form a set of basic theoretical system and practical design method for this novel type of linear motor, and provide a beneficial reference for the application of transverse flux linear machine in the vertical transportation system.