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。

Abstract: 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 axisymmetric,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.
Key Words: Halbach permanent magnetic array；Tubular linear generator；Wave energy；Optimization；The finite element equation