基于ansoft2kw永磁同步风力发电机电磁特性仿真分析.docVIP

江 西 理 工 大 学 本 科 毕 业 设 计（论文） 题目：基于ansoft的2kw永磁同步风力发电机电磁特性 仿真分析 学院：电气工程学院电气工程及其自动化刘细平 Ansoft12.1为基础对永磁发电机构建了几何模型和二维模型，并在二维模型的基础上进行了瞬态场仿真计算，仿真结果和实际运行结果吻合，表明可以借助有限元仿真的方法对电机进行优化设计。通过瞬态场计算结果能直观地看到磁力线和磁感应强度的分布情况，和电枢反应对感应电动势的影响，并以次为依据确定了发电机优化后的结构参数及所用材料。 关键词：永磁；风力；直驱式；发电机；结构设计；；； ABSTRACT In recent years，with the improvement of the permanent magnet materials magnetic properties，and the decreasing of the price of materials，coupled with the many advantages of permanent magnet generators，more and more field are using permanent magnet generator，Permanent magnet generator has the advantages of small size，low loss，high efficiency，when energy conservation and environmental protection are taken seriously increasingly in today，so it is very necessary to its research. This Paper analyzed the structure and character of earth rare permanent magnet synchronous generator in detail，selected generator’s stator and rotor structure according to actual conditions. The rotor adopted radial excitation structure that generator internal structure arranges more closely. Permanent magnetic material adopted NdFeB. This study started from the internal structure and working Principle of permanent magnet generator，analyzed internal factors which influence the generator’s output voltage，which is the armature reaction. To reduce the influence on generator’s output voltage，firstly optimized flux density operating Point of stator tooth and generator structure，then optimized the size of air gap. This study constructed geometric model and the two-dimensional model on the basis of the finite element analysis software Ansoft12.l，and calculated the transient field based on the two-dimensional model. Simulation results coincide with practice operation results，so this method can be used for generator’s optimization design. Through the result of transient field calculating，we can observe distribution of magnetic line of force，besides the influence on generator’s output voltage. Key Wordspermanent ma