Title :
Power loss in electrical steel under elliptically rotating flux conditions
Author :
Salz, Werner ; Hempel, Karl-August
Author_Institution :
Inst. fur Werkstoffe der Electrotech., Aachen Univ. of Technol., Germany
fDate :
3/1/1996 12:00:00 AM
Abstract :
The power loss of electrical steel sheet given in the data sheets of the steel manufacturers is related to linearly alternating flux conditions, measured with an Epstein frame or a single sheet tester, respectively. In the application of the material in electrical machines, we find large areas with rotational flux conditions, i.e., in the T-joint region of three-phase power transformers or above the stator teeth of three-phase motors and generators. The most general description of the magnetization process in this case is an elliptically rotating flux. The paper outlines the magnetic behavior of steel sheet under these flux conditions, and finally defines a simple method to predict the total power loss under elliptically rotating flux from data measured under linearly alternating and circularly rotating flux conditions only
Keywords :
ferromagnetic materials; iron alloys; losses; magnetic flux; magnetisation; silicon alloys; Fe-Si; T-joint; electrical machine; electrical steel sheet; elliptically rotating flux; magnetization; power loss; stator teeth; three-phase generator; three-phase motor; three-phase power transformer; Electric variables measurement; Loss measurement; Magnetic materials; Manufacturing; Power measurement; Power transformers; Sheet materials; Stators; Steel; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
