YANG Chaojun,ZHU Zhicheng,WANG Kaixuan,et al. Analysis of electromagnetic vibration and noise of slotted disk-type asynchronous magnetic couplers[J]. Journal of Mechanical Transmission,2026,50(1):40-49.
YANG Chaojun,ZHU Zhicheng,WANG Kaixuan,et al. Analysis of electromagnetic vibration and noise of slotted disk-type asynchronous magnetic couplers[J]. Journal of Mechanical Transmission,2026,50(1):40-49. DOI: 10.16578/j.issn.1004.2539.2026.01.006.
Analysis of electromagnetic vibration and noise of slotted disk-type asynchronous magnetic couplers
Alternating magnetic fields induce vibrations in mechanical components
thereby generating noise. Fluctuations in electromagnetic excitation forces and electromagnetic torque are the primary causes of electromagnetic vibration noise. To analyze the generation mechanisms and functional patterns of these fluctuations
an electromagnetic vibration noise analysis was conducted on a slotted disk-type asynchronous magnetic coupler with 9 pole pairs and 16 slots.
Methods
2
Firstly
theoretical formulas for air-gap magnetic flux density and electromagnetic excitation force were derived using the magnetic scalar potential permeance method and Maxwell stress tensor method. Combined with finite element simulation
the harmonic order amplitudes of the Fourier decomposition of air-gap magnetic flux density and electromagnetic excitation force were obtained. Secondly
based on the energy method
an expression for cogging torque was derived. Finite element simulation was employed to determine the cogging torque and electromagnetic torque fluctuations generated during the operation of the magnetic coupler. Thirdly
an electromagnetics-structural-acoustic multi-physics coupling model was established. Using the modal superposition method
vibration acceleration and displacement produced during stable operation of the magnetic coupler were obtained
and the characteristics of its electromagnetic noise were analyzed. Finally
a test platform for the magnetic coupler was constructed to measure electromagnetic noise during stable operation. Test results were compared with simulation outcomes to validate the theoretical analysis.
Results
2
The results indicate that low-order electromagnetic excitation forces are the main causes of vibrations in the magnetic coupler
and significant vibrations occur when the frequency of the electromagnetic excitation force approaches the natural frequency of the magnetic coupler. Comparison with simulation results shows that the test data obtained from the magnetic coupler test platform confirm the accuracy of the theoretical analysis.
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