离散Halbach磁体电机开路磁场分布的计算方法  

Open-Circuit Magnetic Field Analysis of Segmented Halbach Magnetized Machines

作　　者：石磊[1] 张晓锋[1] 乔鸣忠[1] 杜承东[1] 

机构地区：[1]海军工程大学,湖北武汉430033

出　　处：《微特电机》2008年第3期1-4,19,共5页Small & Special Electrical Machines

摘　　要：通过对90°-Halbach磁体的分析,得到其分析模型和磁场计算表达式。该模型和公式是建立在极坐标基础上的,首先对永磁体的磁化强度作Fourier级数分解,再列出标量磁位磁场基本方程,最后利用边界条件将两者结合,求出磁场分布。文中对公式结果进行了分析并同有限元的计算结果作对比。虽然在公式推导过程中是以内转子、90°-Halbach电机为例,但是该方法却适用于各种角度、各种形式的Halbach电机,具有普遍意义。Analytical models and formulas for predicting the magnetic field distribution in four segments Halbach magnetized machines were developed. They were formulated in polar coordinates, and the magnetization intensity of PM were expanded into a Fourier series,the basic magnetic field equation were described by the scalar magnetic potential. Then,combining them two into equations according to the boundary condition, the predicted magnetic field distribution were obtained. The predicted results and the finite - element analyses and measurements were analyzed and compared. The formula was obtained from inner rotor,two - segments per pole, and practical Halbach machines, but the ways to obtain it was applicable to all Halbach machines.

关 键 词：HALBACH 标量磁位 磁场分布 计算公式 

分 类 号：TM34[电气工程—电机]