Analysis of steep-fronted voltage distribution and turn insulation failure in inverter-fed form-wound AC motor

作     者：Tang, YF 

作者机构：Emerson Elect Co Emerson Motor Technol Ctr St Louis MO 63136 USA 

出 版 物：《IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》 (IEEE Trans Ind Appl)

年 卷 期：1998年第34卷第5期

页      面：1088-1096页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：The author would like to thank A. Bonnett at the Emerson Motor Technology Center for discussion and suggesting literature  and K. Buntin and H. Barr for surge testing at the Mena  AR plant of U.S. Electrical Motors  a division of Emerson Electric Company. The PWM insulation test system was jointly developed by U.S. Electrical Motors and Directed Energy  Inc 

主　　题：AC motors insulation life machine windings pulse-width modulation inverters surges voltage distribution 

摘      要：As a potential source of turn insulation failure, the steep-fronted voltage at the motor terminal generated by pulsewidth modulation drive snitching or cable ringing is not uniformly distributed among the coils of the windings and among the turns of the coils, This paper presents a detailed electromagnetic analysis of the parameters of a transient model of coil and coil group which includes iron loss, sl;in, and proximity effects. The finite-difference method is applied to solve the model for the interturn and intercoil voltage distributions, The simulation is compared to a simplified lattice diagram analysis and to test results. A turn insulation surge-withstanding capability study is then presented with a flexible insulation test system that models the repetitive steep-fronted voltage stress and temperature stress.