摘要
绝缘栅双极型晶体管(IGBT)串联应用的关键技术是均压控制。峰值控制技术是保证串联运行中每个IGBT的集射极电压都不超过安全极限的有效技术。在介绍IGBT工作特性的基础上,对串联IGBT关断过程不同动态时段内的均压控制目标进行了分析,为设计不带RC缓冲回路的均压方法提供了理论基础。综合各阶段控制要点,采用基于稳压管箝位的峰值控制方法,在低压实验中实现了有效的串联均压,验证了理论分析的正确性。最后,针对该方法在高压应用时的缺点,提出了一种新的峰值控制方法,并通过仿真验证了该方法均压控制的有效性。
The key technology of series IGBTs is voltage balancing control.Clamping control is an effective technology which keeps the series IGBTs running in the safe area.Based on the induction of the output characteristic of IGBT, this paper analyses the objects of voltage balancing control in different steps of turning off.It adopts the zener clamp- ing control method to achieve the voltage balancing effectively in low-voltage experiment.Finally, according to the dis- advantage of this method in the high-voltage area, this paper proposes a new method based on clamping control and verifies the effectiveness of voltage balancing control hy simulation.
出处
《电力电子技术》
CSCD
北大核心
2013年第6期74-76,共3页
Power Electronics
关键词
绝缘栅双极型晶体管
均压
峰值控制
insulated gate bipolar transistor
voltage balancing
clamping control
