摘要：本文基于磁场调制原理分析了磁场调制式磁力齿轮的结构，从功率守恒的角度揭示了磁力齿轮的运行原理。本文计算了两个不同圆心角大小的磁力齿轮的外气隙的气隙磁密，并对气隙磁密进行谐波分析，揭示了调磁铁块圆心角的大小对调磁铁块的调磁性能的影响。通过对有限元模型的计算，本文率先探究了磁力齿轮的最大静态转矩与永磁体极弧系数的关系，并找到最佳极弧系数。
关键词：磁力齿轮；功率守恒；圆心角；静态转矩；极弧系数
Abstract: This paper analyzed the structure of a field modulated magnetic gear based on field modulation，and revealed the operation principle of the magnetic gear in the perspective of power conservation. The paper calculated the air gap flux density of external air gap of magnetic gear with different central angle. Through the harmonic analysis of air gap flux density, the paper revealed that the central angle of ferromagnetic polepieces had great influence on performance of field modulation. Based on finite element method, the paper is the first to propose that the relationship between the maximum static torque and pole arc coefficient of permanent magnet and find the optimal arc coefficient.
Key words: magnetic gear; power conservation; central angle; static torque; pole arc coefficient