Vibration Analysis and Suppression of Megawatt Permanent Magnet Generator

The megawatt permanent magnet generator has emerged as the fundamental power supply equipment for marine power generation systems. Effectively mitigating its vibration noise standed out as one of the most crucial challenges in motor design. Current research primarily focused on optimizing the electromagnetic structure and enhancing control strategies for permanent magnet generators. In this study, a novel connection structure with radial elasticity and axial rigidity is proposed to effectively alleviate the impact of stator core vibrations on the stator frame. A 2.7MW permanent magnet generator was taken as an example, electromagnetic forces and vibrations generated by it are initially calculated through analysis, and the reliability of this calculation method is verified by comparing it with experimental data. Subsequently, the prototype incorporates the special connection structure, and its effectiveness is confirmed through comparison with vibration analysis results.