圆筒型Halbach永磁直线发电机磁场结构的优化  

Optimization of The Magnetic Field Structure of Tubular Linear Generator with Halbach Permanent Magnets

作　　者：杨恒山[1] 余海涛[1] 胡敏强[1] 

机构地区：[1]东南大学电气工程学院,南京210096

出　　处：《微电机》2010年第2期26-29,共4页Micromotors

摘　　要：为了提高永磁发电机的发电功率和永磁体的利用率,提出了一种新型的用于海浪发电的圆筒型Halbach永磁直线发电机。该发电机内的电磁场具有轴对称性,故将其三维电磁场简化为二维场进行分析,建立了二维有限元方程。应用ANSYS软件对使用常规永磁阵列与Halbach永磁阵列时发电机的气隙磁场进行了比较,也对Halbach永磁阵列中相邻永磁体块的磁化角度差δm分别为45°、60°、90°时发电机的气隙磁场进行了比较,得出了结果较优的方案,结果可靠。In order to improve the performance of the permanent magnetic generator, a tubular linear generator with Halbach permanent magnets has been proposed. The electromagnetic field in the linear generator is axisymrnetric, so simplify 3D electromagnetic field to 2D to analysis. The 2D finite element equation has been derived. The electromagnetic field in the generator using normal permanent magnets is compared with the one using Halbach permanent magnet by ANSYS. Analyzed The electromagnetic field in linear generator and optimized the Halbach permanent magnet structures with different magnetic field angle δm between adjacent permanent magnet blocks. Finally the reliable results are obtained.

关 键 词：Halbach永磁阵列 圆筒型直线发电机 海浪能 优化 有限元方程 

分 类 号：TM313[电气工程—电机] TM359.4