Permanent Magnetic Coupling Drivetrain Characteristic Analysis and Pole-slip Monitoring Strategy

XU Yongxiang; LI Qianni; LI Shaobin; ZHU Pengcheng; ZOU Jibin; {{custom_author.name_en}}

doi:10.13334/j.0258-8013.pcsee.250205

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Permanent Magnetic Coupling Drivetrain Characteristic Analysis and Pole-slip Monitoring Strategy

更新时间：2026-10-19

- Permanent Magnetic Coupling Drivetrain Characteristic Analysis and Pole-slip Monitoring Strategy
- Vol. 46, Issue 6, Pages: 2345-2354(2026)
- 作者机构：
  
  哈尔滨工业大学电气工程及自动化学院,黑龙江省,哈尔滨市,150006
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.250205
  CLC：
- Received：20 March 2026，
  
  Published：2026
- 稿件说明：
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XU Yongxiang, LI Qianni, LI Shaobin, et al. Permanent Magnetic Coupling Drivetrain Characteristic Analysis and Pole-slip Monitoring Strategy[J]. 2026, 46(6): 2345-2354.
DOI：

XU Yongxiang, LI Qianni, LI Shaobin, et al. Permanent Magnetic Coupling Drivetrain Characteristic Analysis and Pole-slip Monitoring Strategy[J]. 2026, 46(6): 2345-2354. DOI： 10.13334/j.0258-8013.pcsee.250205.

摘要

永磁磁力耦合器（permanent magnet coupling，PMC）常用于液体/固液混合环境中连接涡轮、叶片等负载。为解决传动中由冲击导致的失步问题，该文提出一种不依赖于负载信息的宽频域PMC失步状态监控方案，旨在实现准确的失步检测和快速重耦合。首先，通过实验与理论分析，揭示磁耦合的传动特性，并确定永磁磁力耦合传动系统的临界稳定条件。然后，针对失步转矩信号的正弦时变特性，构建一种独立于闭环控制的自适应频率监控模块。结合频率约束边界与信号持续时间，建立无需负载信息的PMC失步判据。一旦监测到失步信号，指令规划控制器将在转矩约束范围内规划速度指令，以促进PMC传动系统的平滑重耦合。最后，搭建磁耦合试验台，验证所提监控方案的可行性和有效性。

Abstract

Permanent Magnet Coupling (PMC) is commonly used in liquid or liquid-solid hybrid environments to connect loads such as turbines and blades. To address impact-induced pole-slip

this paper proposes a wide-frequency pole-slip state monitoring scheme for PMC that does not rely on load information

aiming to achieve precise pole-slip detection and rapid re-coupling. First

through experimental and theoretical analysis

the magnetic coupling transmission characteristics and critical stability conditions of the PMC drive-train are revealed. Then

focusing on the sinusoidal time-varying characteristics of pole-slip torque signal

an adaptive frequency monitoring module independent of closed-loop control is constructed. By combining frequency constraint boundaries with signal duration

a PMC pole-slip criterion without load information is established. Once a pole-slip signal is confirmed

the instruction planning controller will plan the speed commands within the torque constraint range to facilitate smooth re-coupling of the PMC drivetrain. Finally

the feasibility and effectiveness of the proposed monitoring scheme are verified through a magnetic coupling test bench.

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