中高压大功率IGBT数字有源门极开环分级驱动技术

Open-Loop Hierarchical Control Technology of High-Power IGBT Digital Active Gate Drive

在中高压、大容量电力电子变流系统中,大功率绝缘栅双极晶体管(IGBT)是变流器的关键器件,而门极驱动技术是影响IGBT功率器件及其组成的变流系统发挥最优性能的关键因素。首先,对IGBT门极驱动控制技术进行理论分析,确定开环分级点;其次,给出基于FPGA的数字有源门极开环分级驱动器具体实现电路;最后,基于设计的数字驱动器和Concept驱动器进行对比实验,结果表明在不恶化其他参数(反向恢复电流、关断电压尖峰、diC/dt、dvCE/dt)下,所研究的数字分级驱动器可减少开通关断延时。

The high-power IGBT is a key component in the medium-high voltage and large-capacity power electronic converter system, while the gate drive technology is a critical factor influencing the performance of IGBT devices and converter system. This paper theoretically analyzed the IGBT gate drive control technology, proposed an open-loop hierarchical drive scheme, and designed a specific digital drive circuit based on the FPGA. The comparisons of the designed driver with the Concept driver through experiments show that the designed driver can effectively reduce switching delay time without degrading other parameters（reverse recovery current, turn-off overvoltage, diC/dt, dvCE/dt）.