一种新型弧形磁场调制永磁电机的设计与分析

弧形永磁电机广泛应用于特种制造、机械臂、雷达系统、天文望远镜等需要在特定角位移内往复运行的高精度场合，弧形永磁电机的转矩波动与转矩密度往往决定着整个系统的成败。为了在不牺牲转矩密度的同时降低转矩波动，提出一种新型弧形磁场调制永磁电机拓扑结构。针对这种新型结构，首先介绍了其运行原理及优化设计方法，并与传统的弧形永磁电机进行了性能对比。结果表明，文中提出的新型弧形磁场调制电机转矩密度更高、转矩波动更小，同时结构复杂度基本不增加，因此在下一代高精度运行场合中应用前景良好。

Design and Analysis of a Novel Arc Flux Modulation Permanent Magnet Machine

Arc permanent magnet machines have been widely applied in high-precision devices, which need to reciprocate within a specific angular displacement, such as special manufacturing, robotic arms, radar systems, and astronomical telescopes. The torque ripple and torque density of arc permanent magnet machines greatly influence the performances of the entire system. In order to reduce the torque ripple without reducing the torque density, a novel arc flux modulation permanent magnet machine was proposed in this paper. First, the operating principle and optimization design process of this novel machine were introduced. Then, key performances including torque density, cogging torque and torque ripple were compared with those of the traditional arc permanent magnet machine. It is found that the novel arc flux modulation permanent magnet machine provides higher torque density, smaller torque ripple, and barely increase the structural complexity. Therefore, the proposed machine has a promising prospect in the next generation of the high-precision motion applications.