Research on the vibration and noise of less rare-earth interior U permanent magnet synchronous machine

In recent years, a lot of attentions have been paid to the less rare-earth permanent magnet synchronous machine (LRE-PMSM). The LRE-PMSM combines the features of two machine types: high energy density, high efficiency of the permanent magnet synchronous machine and the lower cost of the synchronous reluctance machine. The design optimization of the less rare-earth interior U permanent magnet synchronous machine (LRE-IUPMSM) is investigated in this paper. And a general approach for the analysis of noise is presented.