An Axial Modulating Permanent Magnetic Gear using Halbach Magnet Arrays
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摘要: 本文提出了一种可输出高转矩的轴向调制永磁齿轮。在不改变轴向调制永磁齿轮整体尺寸的情况下，将主、从动磁极按照Halbach永磁阵列进行排列，利用Halbach永磁阵列的聚磁作用，增大主、从动侧气隙内耦合磁场的磁场强度，并使用有限元法对这种永磁齿轮进行了仿真分析。结果表明Halbach永磁齿轮比传统阵列永磁齿轮的输出转矩更大；对气隙磁通量密度的谐波分析表明，Halbach永磁齿轮和传统阵列永磁齿轮的气隙磁密谐波变化趋势一致，因此传动机理不变；对Halbach永磁齿轮的磁极的扇形角度进行优化处理后，可以进一步增大输出转矩。
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关键词:
- 永磁齿轮 /
- 高转矩 /
- 轴向调制 /
- Halbach永磁阵列 /
- 有限元法
Abstract: This paper proposes an axial modulating permanent magnetic gear (PMG) which has a high output torque. With the overall size of the axial modulating PMG kept still, the permanent magnets (PMs) on the input rotor and the output rotor are installed with Halbach magnet arrays to increase the intensity of a coupled magnetic field in an airgap. The proposed PMG was investigated with the finite element method. The simulation results show that the output torque of the PMG with Halbach magnet arrays is significantly larger than that of the PMG with the conventional magnet arrays. The harmonic analysis of waves of magnetic flux in airgaps indicates that the trends of magnetic flux produced by the PM on the PMG with Halbach magnet arrays and those on the PMG with conventional magnet arrays are similar, thus having the same transmission mechanisms. The sector angle of the PM on the PMG with Halbach magnet arrays can be optimized to further increase its output torque. -
表 1 永磁齿轮参数
参数名称 数值 转子外径/mm 180 磁极、调制极径向尺寸/mm 30 主动磁极对数Ph 4 调制极数量Pm 23 从动磁极对数Pl 19 调制极扇形角度/(°) 7.83 主、从动转子轭厚度/mm 5 主、从动磁极以及调制极的厚度/mm 10 主、从动侧气隙/mm 1 铁磁材料相对磁导率 4 000 空气、非铁磁材料相对磁导率 1 永磁体相对磁导率 1.05 永磁体剩磁/T 1.25 
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