摘要
旋转磁场分布是永磁同步发电机铁心损耗计算的基础。目前,对于旋转磁场计算一般都是通过建立转子处于不同位置时有限元磁场模型来实现,即模型重构法。这种方法对于每一个转子位置的磁场分析都要重复建模-划分网格,从而使得整个分析过程效率低下。基于此,本文提出一种高效计算同步永磁发电机旋转磁场数的静止边界法,该方法通过改变静止边界节点磁位的耦合顺序来等效转子的旋转,克服了模型重构法电磁计算过程中需反复建立模型所导致效率低下的缺点。通过比较两种方法的计算结果,验证了静止边界法在电机旋转磁场计算中的正确性和高效性。同时静止边界法保证了在旋转磁场的计算过程中,定、转子模型中有限元单元的形状、位置及构成节点信息的一致性,为永磁同步电机铁耗分布的准确计算提供了单元磁密时域解。
The iron loss of permanent magnet synchronous generator was calculated based on the rotating magnetic field distribution. At present, different finite element models corresponding to the positions of rotor were established to calculate the rotating magnetic field, i. e. , the model reconstruction method. The modeling-mesh process was repeated due to the different positions of rotor, which makes the whole a-nalysis process inefficient. Based on this, the stationary boundary method which can calculate the rotating magnetic field distribution with efficiency was proposed. By changing the coupling order of the boundary node’ s magnetic potential to equivalent to the rotor’ s position, the analysis process efficiency can be in-creased. By comparing the calculation results, correctness and efficiency of the stationary boundary meth-od were verified. At the same time, by using the stationary boundary method, the finite element ’ s shape, location and consistence to form the node information can be ensured. Magnetic flux density do-main solution were given for the accurate calculation of iron loss distribution.
出处
《电机与控制学报》
EI
CSCD
北大核心
2015年第5期37-43,共7页
Electric Machines and Control
基金
国家自然科学基金(51307082)
关键词
永磁同步发电机
模型重构法
静止边界法
铁耗
permanent magnet synchronous generator
model reconstruction method
stationary boundary method
iron loss
