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Research on the Suspension Force Model for the Large-Air-Gap Permanent-Magnet Suspension Belt Conveyor

Suspension force is the most critical element that affects working performances of permanent-magnet-suspension belt conveyors. In this article, a mathematical expression of magnetic fields around the mutually-exclusive permanent neodymium iron boron magnet is presented against problems such as the difficulty in using existing formulas of suspension force to solve magnetic flux density and correction coefficient on the basis of electrodynamic molecule hypothesis and Biot-Savart law together with the actual measurement. Also, a large-air-gap suspension force measurement device is designed to determine the correction coefficient through regression analysis. Results show that the maximum calculation error of the corrected mathematical model of suspension force being up to 4.7% can accurately describe the bearing characteristics of the permanent-magnetic-suspension belt conveyor, providing a reference for designing the permanent-magnetic-suspension belt conveyor.