No-load Iron Loss of a Surface-Mounted Permanent Magnet Synchronous Motor utilizing an Amorphous Metal Stator Core

Abstract

The no-load iron loss characteristics of a radial flux surface-mounted permanent magnet synchronous motor (PMSM) with an amorphous metal stator core (AMSC) are investigated using finite element method and verified by experiments. Firstly, the magnetization curves and loss curves of a stacked AMSC at different frequency are tested based on a ring-shape specimen method. The loss coefficients and correction factors for analyzing the iron losses are presented based on the experiments. Then, finite element method is adopted to investigate the iron loss at inverter supply and sinusoidal supply, different inverter modulation ratios and air gap lengths. An experimental platform is established to test the total iron loss at different speed for both sinusoidal supply and inverter supply, and the experimental results are compared with the calculation results in the same situation. The comparison shows that the accuracy of calculation results can meet the needs of engineering practice.