Optimal Design of Permanent Magnetic Coupling with High Torque Transmission and Low Eddy-current Loss

Abstract

This study presents an optimal design of permanent magnetic coupling (PMC) for dynamic sealing in pressurized vessel considering non-leakage of harmful working medium. An improved partial swarm optimization method was designed to perform a multi-objective design optimization of the structure of PMC, in order to increase the torque transmission with limited magnetic material cost and decrease the eddy-current loss of the magnetic coupling caused by the metal isolation cover. After accurate computation, the optimal structure parameters of PMC were obtained. Then, a 3-D finite element model of PMC with the optimal structure was constructed to analyze the transmitted torque and eddy current loss, and verified the validity of the proposed design method