Analytical modeling and analysis of magnetic field and torque for novel axial flux eddy current couplers with PM excitation

• Main Authors: Zhao Li, Dazhi Wang, Di Zheng, Linxin Yu
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2017-10-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/1.4998658

Rotational permanent magnet eddy current couplers are promising devices for torque and speed transmission without any mechanical contact. In this study, flux-concentration disk-type permanent magnet eddy current couplers with double conductor rotor are investigated. Given the drawback of the accurate three-dimensional finite element method, this paper proposes a mixed two-dimensional analytical modeling approach. Based on this approach, the closed-form expressions of magnetic field, eddy current, electromagnetic force and torque for such devices are obtained. Finally, a three-dimensional finite element method is employed to validate the analytical results. Besides, a prototype is manufactured and tested for the torque-speed characteristic.