【摘要】 轴向磁场磁通切换型永磁(Axial Field Flux-Switching Permanent Magnet Machine,AFFSPM)电机是一种高功率密度、高效率的新型永磁电机,但由于其定、转子的双凸极结构引起的聚磁效应,同传统的永磁电机相比,该结构电机的齿槽转矩较大。为了减小齿槽转矩,进一步提高电机性能,本文对AFFSPM电机的齿槽转矩进行了分析,首先推导了齿槽转矩的解析表达式,然后对转子齿面开辅助槽法进行了研究,采用实验设计(DOE)方法得到了齿槽转矩与辅助槽槽宽、槽深和槽扇形角之间的数学模型,计算出使齿槽转矩最小的辅助槽槽宽、槽深和槽扇形角的最优组合,并通过三维有限元法(FEM)验证了所得结果的正确性。结果表明,转子齿开辅助槽可以有效地削减齿槽转矩,转子齿面开两个辅助槽,优化辅助槽口宽度、槽口深度和槽口形状为3°、1.79mm和1.62°,齿槽转矩最大可以减小约44.3%。更多还原

【Abstract】 Axial field flux-switching permanent magnet(AFFSPM) machine is a novel PM machine with high torque density and efficiency. The cogging torque in AFFSPM machine is larger than that in the traditional PM machine because of the flux focusing which is caused by the double salient structure. In order to decrease the cogging torque, the analytical expression of the cogging torque is deduced and the influence of the rotor teeth notching on the cogging torque is investigated. The mathematical model about the slot width, slot depth and slot fan angle is achieved by using design of experiment(DOE) and the optimal combination with the minimum cogging torque is obtained. The accuracy of the analysis is examined by the 3D finite element method(FEM). The results show that the cogging torque can be reduced by the rotor teeth notching and the cogging torque can decrease by44.3% when the notching slot width, depth and shape are optimized to 3°, 1.79 mm and 1.62°respectively.更多还原