摘要
随着新能源产业大发展,高压大功率电力电子设备中常使用IGBT器件。由于IGBT器件、封装技术的限制,常用的IGBT模块的功率容量不能做到很高,大容量的变流器设备常使用IGBT模块的并联。IGBT模块并联时常使用栅极驱动器直接并联,由于驱动回路、IGBT的不一致性,会在驱动回路和功率回路会耦合形成驱动的射极环流,影响并联的均流效果和驱动的可靠性。分析了射极环流形成的原因,通过简化模型,定性解析给出了射极环流形成的过程、输出电感对动态均流的影响。使用saber仿真软件搭建仿真电路,仿真表明射极Re电阻能够抑制射极环流,形成负反馈机制减弱动态不均流,输出交流电感增大可以抑制开关暂态的不均流,最后通过实际试验,验证了仿真的正确性,给工程中设计IGBT并联的功率模块的均流设计提供了设计参考。
With development of the new energy industry,IGBT modules are always used in power electronic equipment of high voltage and current.With the restriction of IGBT and packaging technology,common used iGBT modules can not satisfy the needs of high power modules,so IGBT paralleling is the most used methods to improve the power capability of power electronic equipment.Paralleling IGBT modules are always drives with the same one buffer,with differences of circuits and IGBT modules,emitter ring current flows through the drive and power circuit.This phenomenon affects the parallel current sharing and driving reliability.The article analysis the causes of emitter ring current and gives analytical solutions of emitter ring current and transient current imbalance with simplified module.Simulation of saber circuits are used to verify the correction of the analysis,simulation results show that the Re resistor can restrain the emitter ring current and reduce transient current imbalance with negative feedback.The larger output Ac inductance,the smaller transient current imbalance.Practical experiments confirm the correction of the analysis at last,and give a reference to the design of the IGBT paralleling power modules.
作者
张帆
张飞库
槐博超
汪钊
王聪
Zhang Fan;Zhang Feiku;Huai Bochao;Wang Zhao;Wan Cong
出处
《变频器世界》
2023年第7期67-71,共5页
The World of Inverters
关键词
绝缘栅双极晶体管(IGBT)
并联均流
动态均流
射极环流
Insulated gate bipolar transistor(IGBT)
Parallel current sharing
Transient current sharing
Emitter ring current
