关键词: 垂直轴, 永磁风力发电机, Halbach 阵列, 温度场分析

Abstract: To address the need for harnessing wind energy in low-speed wind regions,this paper investigates a directdrive permanent magnet synchronous generator utilizing a Halbach array for verticalaxis wind turbines. By optimizing the magnetic circuit design,this study focuses on analyzing the influence of Halbach arrays with different magnet proportions on improving the electromagnetic performance of the generator. Finite element analysis results indicate that, compared to the conventional radial magnetization scheme,the 1 / 2 Halbach array effectively enhances the air-gap magnetic flux density and optimizes its distribution, leading to a 10. 5% increase in amplitude. Furthermore, it significantly improves the sinusoidal
characteristics of the magnetic field,suppresses higher-order harmonics,and helps reduce the torque ripple of the motor. The thermal performance of the generator under rated operating conditions was evaluated through temperature field simulation. The results indicate that the temperature rise of all components remains within the safe limits allowed by the insulation class,verifying the thermal stability and operational reliability of the design. This research confirms the effectiveness of the Halbach array in improving the overall performance of generators for low-wind-speed applications, providing a valuable reference for the efficient design of related equipment.

Key words: vertical axis, permanent magnet wind generator, Halbach array, temperature field analysis