A self-aligning compensation type permanent magnet synchronous coupling based on segmented coils

By using segmented coils and axial adjustment mechanisms in permanent magnet synchronous couplings, misalignment problems during installation and commissioning are solved, achieving stable movement and efficient transmission of the load shaft, and reducing vibration and wear.

CN116345845BActive Publication Date: 2026-03-24ZHEJIANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-23
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing permanent magnet synchronous couplings are prone to misalignment during installation and commissioning, which leads to unstable movement of the load shaft, reduced transmission efficiency, and may cause rotor wear.

Method used

The segmented coil replaces the permanent magnet of the driven rotor, and the radial magnetic force is adjusted by current to achieve alignment of the shaft center. Combined with the axial adjustment mechanism and the flexible coupling, active adjustment and passive compensation are achieved.

Benefits of technology

It achieves stable movement of the load shaft, reduces vibration, improves transmission efficiency, and protects the rotor structure through self-alignment function, ensuring the stability and accuracy of the rotational speed.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a self-alignment compensation type permanent magnet synchronous coupling based on segmented coils and belongs to the field of permanent magnet synchronous couplings. In the application, the permanent magnets of the inner rotor of the traditional permanent magnet synchronous coupling are replaced by current coils, the radial magnetic force borne by the coils is controlled through current control, and thus the self-alignment is realized. In the device, half of the number of the same segment coils are connected with adjacent coils through power supply, and the other half of the coils are connected with another segment of the power supply coils; the axial adjustment mechanism system can change the meshing area between the inner rotor and the outer rotor, thereby stabilizing the rotating speed; and the elastic coupling can compensate the elastic error of the driven shaft. The application realizes the dynamic alignment of the driven shaft, compensates the position error of the driven shaft in the alignment process, simultaneously ensures the rotating speed stability of the driven shaft, reduces the vibration during rotation, and guarantees the stability and high efficiency of the movement of the load end.
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Citation Information

Patent Citations

  • Permanent magnet coupling shaft coupling self-centering protecting device

    CN104038020A

  • Self aligning-type permanent magnet coupling

    CN108696097A

  • Permanent magnet coupler with centering adjusting device

    CN211908631U

  • Permanent magnetic speed regulation, brake or load apparatus capable of stepless adjustment of magnetic field intensity

    CN104065236A

  • Coil rotation type electromagnetic eddy-current speed regulator

    CN105720791A