Iron Loss Measurement Segregation between an Assembled Stator Core and Tester

For accurate prediction of iron losses in steel laminations, manufacturing effects and actual flux distributions has to be considered in the measurement process. This work aims at proposing a systematic iron loss measurement segregation approach between a tester and an assembled stator core. The tested stator core is exposed to different magnetization levels and frequencies along with different pole configurations produced by the magnetizer to assess the proposed approach. The effects of stator assembly, as well as the rotating nature of the excitation flux, are considered. It is shown that the employment of manufacturer steel data at high flux densities results in a considerable underestimation of the assembled stator core losses. Therefore, a comparison has been conducted between measured specific iron loss data of the stator core and the standard Epstein frame data for the particular M36G29 steel lamination comprising the tested stator.