TY - JOUR A2 - Xu, Cheng AU - Jiang, Hong-Chun AU - He, Yu-Ling AU - Tang, Gui-Ji PY - 2021 DA - 2021/12/23 TI - Effect of Pole Number on Generator End Winding Electromagnetic Force and Mechanical Response before and after RISC SP - 4375415 VL - 2021 AB - This paper comparatively studies on the end winding electromagnetic force and mechanical response for generators with different numbers of poles. The analytical expression of the end winding electromagnetic force is derived under the rotor winding interturn short circuit (RISC) considering the pole number. Meanwhile, the three-dimensional transient finite element simulation is carried on two generators with one-pair poles and three-pair poles. Then, the frequency composition and amplitude variation characteristics of the radial, axial, and tangential electromagnetic forces are analyzed. Further, the maximum stress and deformation on the end winding are calculated and the similarity and difference of the coil failure law are obtained for two kinds of generators. It is found that RISC will bring odd harmonics to electromagnetic force for one-pair pole generators but it will bring odd and fraction harmonics for multipair pole generators. Moreover, the max mechanical response under RISC will decrease for one-pair pole generators but it will increase for multipair pole generators. SN - 1023-621X UR - https://doi.org/10.1155/2021/4375415 DO - 10.1155/2021/4375415 JF - International Journal of Rotating Machinery PB - Hindawi KW - ER -