Analytical Calculation and Measurements of the Magnetic Force Between Permanent Magnet and Rotor Yoke of Large-Scale Permanent Magnet Synchronous Generator

Abstract

This article presents both analytical calculations and empirical measurements of the magnetic force between the permanent magnet (PM) and rotor yoke in a large-scale PM synchronous generator (PMSG). The assembly of PMs in large-scale PMSGs is particularly challenging owing to the substantial magnetic forces involved. Therefore, accurately predicting the PM magnetic force during the assembly process is of paramount importance. The presented analytical solution is instrumental for designing PM assembly jigs across various machine sizes. A scaled-down experimental setup, incorporating a steel plate to neutralize magnetic forces, was employed. The experimental results and the analytical solutions are compared to validate the accuracy of the proposed calculations.