Abstract
The ratios of core losses to material iron losses were investigated with the following results: (1) The ratios of iron losses are influenced by the core shape. (2) It is possible to find the most suitable conditions (Si content and grain size) of non-oriented electrical steel sheets for reducing the hysteresis loss ratios. Electrical steel sheets with higher Si content and larger grain size have lower eddy current loss ratios. (3) The ratios of hysteresis losses and eddy current losses increase with increasing flux densities. These results are explained by the flux distribution due to magnetic non-linearity and saturation, the phase difference between inner and outer fluxes, and the distortion of the flux waveform.
