双定子轴向磁场永磁同步风力发电机的设计

研究表明:如果电机的极数足够多,轴向长度与外径的比率足够小的话,轴向磁场电机比传统径向磁场电机的转矩和功率密度大.轴向磁场电机的缺点是电枢铁心制造比较困难.为此本文提出一种新的结构方案,用软磁复合材料形成定子的齿部,再与带冲叠片形成的铁心轭部结合起来形成定子铁心,并且使用集中绕组.然后对这种新型轴向磁场电机进行了电磁设计,并用Ansoft有限元法对电机的磁场进行了仿真.结果表明:通过合理地选择主要尺寸和极数/槽数比,可以获得正弦波的电动势波形和较小的齿槽转矩.

Design of Double Stator Axial Flux Permanent Magnet Synchronous Wind Power Generator

Axial flux machines can compete with traditional radial flux machines in terms of torque and power density if the number of pole-pairs is sufficiently high and the ratio of axial length to outer diameter is low.However,it is difficult to manufacture the armature core of the axial flux machine.So this paper proposed a new method.The stator of the machine was realized by using soft magnet compound(SMC) to form a teeth,which was combined with a strip punched laminated core and concentrated winding.Then the electromagnetic design of the machine was performed,and the magnetic field was simulated in the Ansoft Infinite Element Analysis method.Design results and simulation results have indicated that the suitable choice of the main dimensions of the machine and the ratio of the number of pole to slot can achieve sinusoidal emf waveform and small cogging torque.