摘要
讨论了三电平NPC拓扑结构的基本工作原理和相应的换流路径;考虑到IGBT模块对直流电压稳定性的要求,给出在给定故障率条件下允许长期运行的最大直流母线电压;分析了器件芯片技术及封装的特点,给出了在三电平应用中的IGBT解决方案;以4.5k V IGBT为例,研究了三电平拓扑布局应用中杂散电感及结温差异所引起的开关特性问题,并提出一些在三电平设计中关于IGBT模块均流和布局应用方面的建议。
It discussed the basic working principles of three-level topology as well as its corresponding commutation loops, defined the maximum DC-link voltage in continuous operation with given FIT curves by considering reliability requirements, and brought up a solution of three-level topology with IGBT modules by analyzing its chip technologies and housing features. Taking 4.5kV IGBT as an example, it studied the different switching characteristics caused by kinds of stray inductances and junction temperature in three-level topology, and proposed some suggestions about current sharing and symmetric layout of inverter desion.
出处
《大功率变流技术》
2015年第2期24-29,34,共7页
HIGH POWER CONVERTER TECHNOLOGY
关键词
三电平拓扑
IGBT
换流回路
直流母线电压
杂散电感
结温
均流
对称结构
three-level topology
IGBT
commutation circuit
sharing
symmetrical layout
DC-link voltage
stray inductance
junction temperature
current
