The estimation of losses plays a key role in the process of building any electrical machine.How to estimate those losses while designing any machine; by obtaining the characteristic of theelectrical steel from the catalogue and calculate the losses. However, this way is inaccurate sincethe electrical steel performs several manufacturing processes during the process of building anymachine, which affects directly the magnetic property of the electrical steel and accordingly thecharacteristic of the electrical steel will be affected. That means the B–H curve of the steel thatwas obtained from the catalogue will be changed. Moreover, during loading and rotating themachine, some important changes occur to the B–H characteristic of the electrical steel such asthe stress on the laminated iron. Accordingly, the pre-estimated losses are completely far fromthe actual losses because they were estimated based on the data of the electrical steel obtained fromthe catalogue. So in order to estimate the losses precisely significant factors of the manufacturingprocesses must be included. The paper introduces the systematic estimation of the losses includingthe effect of one of the manufacturing factors. Similarly, any other manufacturing factor can beincluded in the pre-designed losses estimations.
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