基于多物理场耦合的直驱永磁同步风力发电机定子绕组优化设计

Optimum Design of Stator Winding of the Direct-Drive Permanent Magnet Synchronous Wind-Power Generator Based on Multi-Physical-Field Coupling

直驱永磁风力发电机具有结构简单、成本低、运行可靠等优点,在风能发电领域具有潜在的应用价值。以1台1 200 kW直驱永磁同步风力发电机为研究对象,进行了电磁场、温度场及热应力场等多物理场耦合分析,考虑由于温度变化及热变形对永磁体、铜线等电磁材料性能的影响,最终实现电磁性能、温度及形变的收敛,从而更为准确地分析发电机性能。以多物理场耦合分析方法对该发电机进行定子绕组优化设计,使绕组设计更加合理。所得结论对直驱永磁同步风力发电机设计具有一定的参考价值。

As a wind power generation method,direct-drive permanent synchronous wind-power generator had the advantages of simple structure,low cost,and reliable operation,so it had potential application value in the wind power generation field.Taking a 1 200 kW direct-drive permanent magnet synchronous wind-power generator as the research object,the coupling analysis of electromagnetic field,temperature field and thermal stress field was carried out,and the influences of temperature change and thermal deformation on the properties of permanent magnet,copper wire and other electromagnetic materials were considered,achieving the convergence of electromagnetic performances,temperature and deformation,so that the performances of the generator could be more accurately analyzed.The stator winding optimum design of the generator was carried out through the multi-physical-field coupling analysis method,which made the winding design more reasonable.The conclusions had certain reference value for the design of direct-drive permanent magnet synchronous wind-power generator.