基于软磁复合材料的新型三维磁路永磁电机研究

Soft magnetic composite (SMC) material is a new type of powder metal materials. Compared with traditional silicon steel material, it has many advantages such as low eddy current losses, magnetic properties and thermal conductivity isotropic, easily made into complex structure parts. A novel three-dimensional magnetic permanent magnet machine is proposed which based on the characteristics of the SMC material. It has SMC material stator and toroidal winding and combined the advantages of the traditional radial flux motor and axial flux motor. This structure can take advantage of the space; improve the utilization of the winding and the power density of motor. This project aims to develop a novel structure three-dimensional flux SMC material permanent magnet machine; Research on the three-dimensional magnetic field distribution and the torque generation mechanism of SMC motor; Analysis the basic characteristics of the motor, such as mechanical characteristics and overload capacity; Study on the calculation method of the hysteresis loss and eddy current loss of stator which in the three-dimensional variable magnetic field; Establish motor thermal circuit topology and analysis the temperature distribution of motor under different conditions; Create the calculation model of three-dimensional magnetic circuit of motor; Analysis of air-gap length and other key parameters on the impact of motor performance; Analysis of the design features and general design methods of the SMC motor. The project's success will open up a new direction of the new high-performance permanent magnet machine. The research of SMC motor not only has important scientific significance and academic value, but also has very broad application prospects.

软磁复合材料是一种新型的粉末金属材料。与传统硅钢片材料相比，它具有涡流损耗小、导磁性能和导热性能各向同性、易制成具有复杂结构的部件等优点。本课题基于SMC材料的这些特点，提出一种新型三维磁路结构永磁电机，其定子采用SMC材料和环形绕组结构，有机结合了传统径向磁路电机和轴向磁路电机的优点，提高了绕组和空间的利用率以及电机的功率密度。本项目旨在开发出结构新颖的三维磁路SMC材料永磁电机；研究该类电机内三维磁场分布以及转矩产生机理；分析电机的机械特性、过载能力等基本特性；研究三维变化磁场中的定子磁滞损耗和涡流损耗计算方法；建立电机热网络拓扑结构，分析不同工况下的温度场分布；研究电机三维磁路计算模型，分析气隙长度等关键参数对电机性能影响；总结SMC电机的设计特点和一般设计方法。该项目的研究成功，将为新型高性能永磁电机的研究开辟新的方向。不仅具有重要的科学意义和学术价值，而且具有十分广阔的应用前景。

本课题通过对基于SMC材料的一种新型三维磁路结构永磁电机进行理论分析和有限元研究，其主要成果包括：揭示了新型三维磁路SMC电机工作机理，得到电机空载特性、机械特性、过载能力、转矩波动等性能特点；研究了新型三维磁路SMC电机的铁心损耗计算方法和热网络拓扑，得出该类电机的温度场分布及温升变化规律；建立了新型SMC电机三维磁路拓扑结构，得出磁路参数、结构参数及散热路径对电机性能的影响规律和SMC电机的一般设计方法。理论分析和有限元仿真计算表明，课题基于软磁复合材料的性能特点，提出的新型三维磁路的永磁电机，提高了空间和绕组的利用率，增加电机的功率密度，对航空航天、深海探测和汽车工业的发展以及节能环保都具有重要的意义和广泛的应用前景。项目资助发表EI检索论文3篇，待发表两篇。申请发明专利8项，培养博士生2名，硕士研究生4，参加国际会议1次。项目投入经费25万元，支出19.3578万元，各项支出基本与预算相符。剩余经费5.6422万元，剩余经费计划用于本项目研究后续支出。