能量回馈单元IGBT功率周次问题及改进

摘要

The power feedback unit's applications in the projects was illustrated,the power feedback unit's failure causes the whole drive system down.The failure causes—IGBT power cycling number was analyzed,combined with its typical application.The improvements according to the design experience:to choose the right speed change rate,to choose the suitable energy storing components were proposed.The practice field application verifies such improvements.%基于能量回馈单元应用的节能改造工程中,出现能量回馈单元故障、损坏而影响整个传动系统使用的现实情况.结合能量回馈单元应用的典型工况,分析了失效原因之一——IGBT功率周次的影响.结合设计经验,提出匹配好电机加减速时间、优化储能元件参数等优化可靠性方案.通过实际现场应用的检验,以上优化方案得到了很好的验证.