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《Transactions of China Electrotechnical Society》 1993-01
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End Coefficient Computation for a Composite-Rotor Induction Motor by Analytical Approach

Zhang Mingyu; Lin Jinming;Tang Xiaogao (Huazhong Univ.of Sci.& Tech. )  
On the assumption that stator surface current is kept constanl along axial direction,the expression for end coefficient of a composite-rotor induction motor is derived by2D and 3D field analyses. After simplication, a simple and practical formula is obtained. It is shown that the thickness of the outside steel tube of the rotor has a remarkable effect on the end coefficient. The results of machine performance calculated byparameters corrected with derived formula are found to be agreed well with those measured on a prototype motor.
【Fund】: 国家博士点基金
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