Design and Characteristic Analysis of a High-Speed Permanent Magnet Synchronous Motor Considering the Mechanical Structure for High-Speed and High-Head Centrifugal Pumps

Abstract

This paper presents design guidelines for a high-speed permanent magnet synchronous motor (PMSM) for a 110 hp and 12 500 r/min centrifugal pump considering the mechanical and electromagnetic characteristics. We selected the size of the rotor based on the torque per unit rotor volume method. The rotor stress analysis was performed using the analytical method and the finite-element method. Based on these results, appropriate sleeve thickness and material were selected considering mechanical stability and electrical performance. The PMSM design was carried out by using the mechanically stable rotating body, and the model with excellent electromagnetic performance was selected based on the iron loss analysis and the eddy current loss analysis using the finite-element method. In addition, the stability of high-speed operation was confirmed by the critical speed analysis of the finally designed PMSM model. The high-speed PMSM verifies the performance through the manufacturing and test it was confirmed that there is no problem when applied to the actual centrifugal pump systems.