A Comparison Between Conventional and Flux-Intensifying Interior Permanent Magnet Synchronous Machines

Flux intensifying interior permanent magnet synchronous machine (FI-IPMSM) was designed to improve the characteristic of conventional permanent magnet machines, especially, in constant power or field weakening region. Increasing a saliency ratio is the main method to achieve this target which leads to increasing reluctance torque than magnetic torque and so improving the machine performance. In this paper, the characteristics of FI-IPMSM are investigated. The effect of PM material, PM width, PM thickness, flux barriers width and iron bridge thickness on the machine parameters, output torque and no-load characteristic is studied. A comparison is carried out between the FI-IPMSM and conventional IPMSM to evaluate the improvement in machine performance. Two-dimension time-steeping finite element method (FEM) is employed in analysis of the FI-IPMSM and conventional IPMSM.