Stator core containing iron-aluminum alloy laminations and method of using

摘要

An electrical machine stator core (26) and method for reducing electromagnetic losses and the consequent heating of the core (26). The stator core (26) makes use of laminations (16) made from an iron-aluminum alloy at the core-ends (36) of the core (26), while laminations (18) between the core-ends (36) are formed of a ferromagnetic alloy different from the iron-aluminum alloy. Use of iron-aluminum alloy laminations (16) at the core-ends (36) makes possible a relatively simple technique for generator uprate, by removing laminations (18) located at the core-ends (36) of the stator core (26), and then installing replacement laminations (16) formed of the iron-aluminum alloy at the core-end (36), again with the result that the laminations (16) located at the core-ends (36) are formed of an Fe-Al alloy that is different from the alloy of the laminations (18) between the core-ends (36).