Theoretical Analysis and Experimental Study on the Magnets’ Structure of Magnetic Stirrer

To address synchronization loss, centering difficulties, low magnetic field utilization, and adaptation challenges in sealed and space-limited scenarios within nuclear/chemical industries, this study optimized active magnet and stirrer structures through theoretical, simulation, and experimental investigations. A magnetic force model was established and verified via Maxwell simulations. It was found that axial magnetization of the active magnet provides effective centering magnetic force, while a stirrer composed of permanent magnets and silicon steel exhibits superior magnetic performance. Experimental results validated the theoretical and simulation analyses, confirming that the proposed structure resolves centering and synchronization issues in conventional designs. The optimized axial-magnetized active magnet and permanent magnet-soft magnetic composite stirrer significantly enhance magnetic field utilization and operational stability, offering a reliable solution for stirring and dispersion in sealed nuclear environments.