1 Key Laboratory of Transportation Intelligent Operation and Maintenance Technology and Equipment, East China Jiaotong University, Nanchang 330013, China
2 School of Science, East China Jiaotong University, Nanchang 330013, China
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文章历史+
Received
Published
Revised
2025-06-16
2026-06-28
2025-12-16
Online Date
2026-07-29
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摘要
磁场调制型同轴磁齿轮以无接触传动和高可靠性在风电与船舶装备中具有应用前景,但现有结构存在调制能力不足、磁饱和严重及调制体复杂等问题。提出了一种调制增强型单调磁环双调制轴向磁齿轮(modulation-enhanced single-modulation-ring dual-modulation axial magnetic gear,MSMRD-AMG),利用单一调制磁环同时产生“和调制”与“差调制”谐波,并结合共存多磁路拓扑以削弱局部磁饱和,在保持结构简洁的同时显著提升气隙磁场调制能力与磁通利用率。基于磁场调制理论与三维有限元分析,系统研究了MSMRD-AMG的调制机理、气隙磁密、输出转矩与转矩波动,并与传统结构进行了对比。结果表明,该结构在不增加装配复杂度的情况下显著提升传动性能:低速转子平均转矩由40 N·m增至51.9 N·m,高速转子由-10.4 N·m增至-12.7 N·m;采用聚磁式Halbach永磁体后,其转矩波动进一步从14.1%降至10.1%、30%降至28.4%。因此,MSMRD-AMG在调制效果、磁饱和抑制及转矩性能方面均表现出明显优势,为磁齿轮在风能与潮汐能装备中的高效轻量化应用提供了一种具有工程潜力的新方案。
Abstract
Magnetic field modulation-based coaxial magnetic gears provide contactless transmission and high reliability, making them promising for wind and marine applications. Conventional designs, however, suffer from limited modulation, severe magnetic saturation, and complex structures. MSMRD-AMG (modulation-enhanced single-modulation-ring dual-modulationx) was proposed. Sum-and difference-modulation harmonics were generated with a single modulation ring, and a multi-path topology was employed to reduce local saturation. 3D finite element analysis investigates its modulation mechanism, air-gap flux, torque, and torque ripple. Results show significant improvements: low-speed rotor torque rises from 40 N·m to 51.9 N·m, high-speed rotor from -10.4 N·m to -12.7 N·m, and torque ripple is further reduced from 14.1% to 10.1% and from 30% to 28.4%. with flux-concentrating Halbach magnets. The MSMRD-AMG demonstrates enhanced modulation efficiency, reduced saturation, and improved torque performance, providing a compact, high-efficiency solution for wind and tidal energy systems.
CHEN Ming, ZHENG Zheng, MO Rui-na, WANG Jun-gang, HU Lang-hui.
Electromagnetic Performance Analysis of Modulation-enhanced Single Magnetic Ring Dual-modulation Axial Magnetic Gear[J].
Science Technology and Engineering, 2026, 26(18): 7694-7703 DOI:10.12404/j.issn.1671-1815.2504480
为此,现提出一种调制增强型单调磁环双调制轴向磁齿轮(modulation-enhanced single-modulation-ring dual-modulation axial magnetic gear,MSMRD-AMG)。与传统双调制结构不同,现通过单个调制磁环实现“和调制效应”与“差调制效应”的协同作用,从而在不增加调制环数量的前提下显著提升有效谐波幅值,实现高低速磁场强耦合。构建 MSMRD-AMG 拓扑结构并阐述其和差双调制工作原理;通过三维有限元仿真系统分析其电磁性能,并与传统结构对比;通过 Halbach 排列优化永磁体磁化方式,进一步提升气隙磁场利用率与转矩平稳性;为高效、紧凑、轻量化的磁齿轮设计提供新的工程思路,并为风能与潮汐能装备的应用奠定理论基础。
1 调制增强型单调磁环双调制轴向磁齿轮的拓扑结构与工作原理
1.1 拓扑结构
传统的轴向磁齿轮(axial magnetic gear, AMG)拓扑结构如图1所示。该结构具有高速旋转的永磁转子和低速旋转的永磁转子。高、低速转子镶嵌着轴向充磁的永磁体,两转子直接装有轴向调制的调磁环。调磁环可对高速转子和低速转子形成气隙磁场进行调制。调磁环的个数等于高速转子与低速转子的磁极对数之和,以保证两种磁极的耦合。然而传统的轴向磁齿轮磁场调制能力较弱,磁路单一,磁力线只能通过高速永磁转子穿过调磁环到达低速永磁转子,使之轴向与切向的磁路很难封闭,磁漏较大,永磁体的利用率较低,故导致所传递的最大输出转矩也偏低。
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