变频凸极同步电动机阻尼条断裂故障分析  

Cause Analysis of Broken Damping-Bars for Variable-frequency Salient-pole Synchronous Motor

作　　者：李金香[1] 田昕[1] 孙玉田[1] 陈润年[1] 

机构地区：[1]哈尔滨大电机研究所,哈尔滨150040

出　　处：《大电机技术》2010年第3期5-9,共5页Large Electric Machine and Hydraulic Turbine

摘　　要：凸极同步电机的阻尼条断裂故障时有发生,而变频凸极同步电动机常用于轧钢等恶劣情况,阻尼条频繁受到起、停和突加负载的冲击,其阻尼系统故障更加频繁。本文以本钢变频凸极同步电动机为例,采用场路耦合时变电磁场有限元方法,分析转子静态偏心时阻尼条的电流和电磁力。计算结果表明,转子偏心使阻尼条的电流和电磁力剧增,这可能是导致阻尼条断裂的一个原因。damping-bars of salient-pole synchronous machine are broken occasionally.Variable-frequency salient-pole synchronous motor（VSSM） is used in bad conditions,such as steel rolling.starting-up,braking and pulsing loads,which often impact on the damping-bars.Thus damping system faults occur frequently.Taking VSSM of Benxi steel mill as an example,current and magnetic force in damping-bars that created by rotor eccentricity are analyzed by field-circuit coupling time-stepping FEM in this paper.Calculation results show that current and magnetic force in damping-bars increase sharply with rotor eccentricity.This is a cause of broken damping-bars.

关 键 词：变频凸极同步电动机 场路耦合时变电磁场有限元方法 阻尼条电流和电磁力 转子偏心 

分 类 号：TM341[电气工程—电机]