阐述了横向磁通永磁电机(transverse flux permanent magnet motor,TFPM)的结构特点与软磁复合(soft magnetic composite,SMC)材料的优点,提出硅钢、SMC结合的混合铁心TFPM。为了分析电机转矩及其影响因素,推导了转矩解析公式。基于3D有限元模型,通过静态磁场分析求出了式中永磁体磁链幅值及线圈电感2个变量;通过瞬态磁场分析,得到了电机的空载电动势、空载磁链、一相转矩及其平均值,转矩有限元结果与解析结果一致。样机测得的空载电动势验证了分析的正确性。结果表明,混合铁心TFPM不但结构简单、加工方便,而且转矩密度高、易于模块化。
The structural features of transverse flux permanent magnet motor(TFPM) and advantages of soft magnetic composite(SMC) material were introduced,and then a hybrid iron-core TFPM was presented.The hybrid iron-core combined lamination and SMC material.In order to analyze torque and its influence factor,the torque equation was deduced by analytical method.Its parameters of permanent magnet flux linkage and winding inductance were obtained by static magnetic field analysis based on an effective 3D finite element method(FEM) model.Furthermore,the back EMF,no-load flux linkage,torque and its average value also can be calculated on this model by transient field analysis.By comparing,this FEM torque result was in agreement with that of analytical equation.The predicted analysis results are validated by prototype experimental EMF.It shows that the developed TFPM with hybrid iron-core are not only simple structure and easy manufacture,but also high torque density and easy module.