ABSTRACT:

To sell electromagnetic steel in competitive markets, test results that can properly indicate the iron losses of those products at different specifications are desired. However, with limited measurements, the available data sheets can only cover typical data that were determined from common Epstein frame tests, and further information regarding possible iron losses beyond the measurement setups can only be estimated by approximations. Accuracies in applying these data for related machine performance evaluations at those operational conditions are always uncertain, and more credible data sheets that can adequately characterize the electromagnetic steel properties are certainly expected. Based on the Preisach model and available measurements, a systematic scheme to establish a generalized guidance for evaluating the hysteresis characteristics of electromagnetic steel is proposed. Supported by experimental measurements and detailed three-dimensional (3-D) field analyses, iron losses of those mechanisms constructed by laminated electromagnetic steel can then be estimated with enough confidence.