摘要
有限单元法在计算电机定、转子运动问题的时候,遇到了困难。运动时,定、转子的相对角度不断的改变,对不同转角的转子要进行多步的电磁场计算。而运动会造成气隙单元发生畸变,造成了有限元法求解运动问题时前处理复杂;由于不需要构成单元,无单元法可从根本上消除由转子位置变化引起的网格扭转变形。可将无单元法同有限元法耦合来求解运动问题,在气隙使用无单元法,在其他区域使用有限元网格。采用径向基点插值型无单元法(RPIM)和有限元(FEM)直接耦合方法来解决定、转子之间相对运动问题。计算结果证明,该耦合方法的计算精度满足要求。将其应用在电机电磁场数值计算中,可解决由于有限元法气隙单元畸变产生的误差。
The relative motion of stator and rotor on electric motor is difficultly solved by FEM. With the continuous motion, the dispositions of stator and rotor are changed, multiple steps computations on different rotor positions are needed. The motion causes the distortion of air gap element ,which makes the pre-processing complicated. The element-free method needn＇t element, which could solve distortion of air gap element by motion. The problem of mesh distortion could be solved by coupling of two methods, airgap is solved by RPIM, other area by FEM mesh. The coupling of element-free method and FEM could eliminate the influence of mesh distortion. A coupling method of radial point interpolation method and finite ele-ment method （ RPIM-FEM ） was presented to solve, the relative motion between the stator and rotor. The tests show that the solutions are accurate. The method is used in electromagnetic field of motor and could eliminate the errors due to distortion of airgap elements on FEM.
出处
《微特电机》
北大核心
2013年第10期5-7,共3页
Small & Special Electrical Machines
基金
国家自然科学基金资助项目(2012NYYDLGCXY0008)
