Iron Loss Analysis of Permanent Magnet Synchronous Motor with an Amorphous Stator Core

In this paper, the iron loss characteristics of permanent magnet synchronous motor (PMSM) with a stator core made from amorphous alloy are presented both in numerical computations and experiments. In addition, a conventional motor whose stator core is made from silicon steel sheets is investigated as a comparison. Data for magnetization curve and loss curve of amorphous alloy stator core is obtained experimentally. In the calculation, time-stepping finite element method is applied in order to study iron loss at different inverter switching frequencies. The stator core is separated into 4 regions named yoke, root, body and top for the further investigation of distributions of stator core loss. Then, the components of iron loss are calculated individually according to their origins. An experimental platform is established, and the experimental results of total iron loss under different switching frequencies are obtained, and compared with the calculation results in the same situation. The comparison shows that the accuracy of calculated results can meet the needs of engineering.