摘要
针对现阶段单纯基于磁路法计算精度相对不高的问题,研究了磁路法和时步有限元法的优势和不足。以一台22 k W实心转子永磁电机为例,分别采用两种方法计算了在空载情况下电机的气隙磁密、空载感应电势以及负载情况下的起动转矩、最小转矩等性能指标;并对该样机部分性能指标进行实测。对比实测与计算结果表明,有限元方法准确可靠。进而试算了在不同气隙大小及不同磁钢宽度时电机的性能,提出改进方案,为永磁电机的优化设计提供了重要参考。
To determine the no-load parameters and the starting-up capability of a Line-start Permanent-magnet Synchronous Motor（ LSPMSM） are the fundamentals of a motor optimization design process. It was commonly recognized that the magnetic circuit method had a lower accuracy compared to FEA method,the advantages and disadvantages of the two methods were all analyzed taking a 22 k W LSPMSM as an example. The two methods were applied to analysis the no-load air-gap flux density,back-EMF,starting-up torque and the minimum torque during the starting-up process. It was confirmed that the FEA method had a sufficient accuracy by comparing the test results and the analyzed ones. And then,the FEA method was used to optimize the air-gap length and the width of magnet,a new topology was worked out having better performance. The analysis method and the analyzed results could be treated as important references for a further optimization design.
出处
《电机与控制应用》
北大核心
2016年第4期66-70,89,共6页
Electric machines & control application
关键词
自起动永磁电机
磁路法
时步有限元法
优化设计
line-start permanent magnet motor
magnetic circuit method
time-stepping FEM
optimal design
