Theoretical Computational Model for Cylindrical Permanent Magnet Coupling

Abstract

Permanent magnet coupling is extensively studied owing to its economic efficiency and stability. In this study, a computational model for cylindrical permanent magnet coupling (CPMC) was designed using the magnetic field division method to divide an air gap magnetic field. An equivalent magnetic circuit model was also designed based on the equivalent magnetic circuit method. The novelty of this study is that both the skin effect and the working point of the permanent magnet are taken into consideration to obtain the magnetic circuit and induce eddy current characteristics of permanent magnet coupling. Furthermore, a computational model was obtained for the transmission torque of the CPMC based on the principles of Faraday’s and Ampere’s laws. Additionally, the accuracy of the model was verified using a finite element simulation model and a test bench.

A Review of Recent Developments in Permanent Magnet Eddy Current Couplers Technology

“…A radial-flux PMECC with an internal conductor rotor and an external PM structure was proposed in references [98][99][100]. The bilateral structure, as shown in Figure 8, also appears for the radial flux type since it can also effectively increase the torque [11,12,[101][102][103]. The structure of the surface-mounted radial-flux PMECC is sh 7a.…”

“…A surface-mounted radial-flux PMECC with internal PMs and rotor was proposed in references [89][90][91][92][93][94][95][96][97]. A radial-flux PMECC wit rotor and an external PM structure was proposed in references structure, as shown in Figure 8, also appears for the radial flux effectively increase the torque [11,12,[101][102][103].…”

Analysis of Factors Influencing Measurement Accuracy for High-Temperature Liquid Metal Flow Sensors in Nuclear Power

“…However, the characteristic curve of the sensor cannot be calculated accurately by a theoretical formula calculation, it can only be obtained by finite element simulation analysis [30]. The finite element method accurately describes the distribution of electric and magnetic fields in the device [31]. When designing the flowmeter in this work, the finite element simulation is used to analyze the characteristics of the sensor qualitatively.…”