电力工程技术2024，Vol.43Issue(4)：208-216,9.DOI:10.12158/j.2096-3203.2024.04.022
同步发电机定子铁心磁-热-固耦合计算分析
Calculation and analysis of electromagnetic-temperature-stress coupling of the stator core of synchronous generator
摘要
Abstract
In order to analyze the loss,temperature rise and the mechanical structural response under the combined magnetic tension and thermal stress of the stator core,the electromagnetic-temperature-stress coupling calculation for the stator core of a synchronous generator is carried out in this paper.Firstly,the core loss and the magnetic pull per unit area are theoretically deduced,followed by an analysis of the core's temperature rise characteristics.On this basis,the mechanical structure response of the core under the coupling excitation of magnetic pull and non-uniform thermal load is obtained.Then,a three-dimensional finite element model of the CS-5 synchronous generator is established.This model calculates the magnetic pull per unit area,loss curve and temperature distribution of the stator core.Furthermore,the deformation,strain and stress of the stator core under the simultaneous action of magnetic tension and thermal load are obtained.The results show that the stator slot temperature is highest when the generator runs stably.The deformation at the groove is largest and the stress at the bottom of the groove is higher.Finally,the temperature rises of the end face,inside slot and outside circle of the stator core are monitored in real-time by thermocouples and a temperature monitor.The measured temperature distribution of the stator core is in good agreement with the finite element simulation results,verifying the effectiveness of the electromagnetic-temperature-stress coupling method.In this paper,the temperature distribution of the stator core and the mechanical structural response distribution of the stator core under magnetic and thermal coupling excitation are obtained,providing a technical reference for the reverse optimization design of the generator structure and the prevention of stator core deformation.关键词
同步发电机/定子铁心/损耗/温升/机械结构响应/失效预防Key words
synchronous generator/stator core/loss/temperature rise/mechanical structural response/failure prevention分类
信息技术与安全科学引用本文复制引用
何玉灵,蒋梦雅,邱名豪..同步发电机定子铁心磁-热-固耦合计算分析[J].电力工程技术,2024,43(4):208-216,9.基金项目
国家自然科学基金资助项目(52177042) （52177042）
河北省自然科学基金资助项目(E2020502032) （E2020502032）
中央高校基本科研业务费专项基金资助项目(2020MS114,2023MS128) 本文得到河北省第三批青年拔尖人才支持计划([2018]-27)资助,谨此致谢! （2020MS114,2023MS128）
