A 3-D magnetostatic analysis and calculation of parameters in end region of an induction machine

This paper illustrates effective procedure and methods for both analyzing the magnetic field and calculating the relevant parameters in the end region of an induction machine used in the power system, by some numerical simulations on the basis of a 3-D magnetostatic model. The leakage self-inductance of the stator end coil is estimated by calculating the relevant flux and energy, respectively. The distribution of the magnetic energy and air-gap fringing flux in the end region is demonstrated as well. The magnetic forces exerted on the stator end coil, in addition, are studied and calculated. These results can be used in the estimation for transient conditions and in the improvements of the supports of end coils in large electric machines in the power system.