摘要 该文针对基于共源共栅氮化镓高电子迁移率晶体管(Cascode GaN HEMT)的直流固态功率控制器(SSPC)在开通过程中的振荡问题,利用Spice模型与Q3D软件提取Cascode结构内部寄生参数,结合SSPC实际工作情况和Cascode结构对开通和关断过程进行分析,在Saber软件中对SSPC开通过程进行仿真分析。仿真结果表明,振荡产生的主要原因是,在SSPC开通过程中,Cascode GaN HEMT长时间工作在饱和区,容易受到外界干扰产生振荡,且内部存在正反馈环路。针对该问题,该文提出并联RC吸收电路和增大门级驱动电阻的方案,实验结果表明,所提出的方案可以有效抑制振荡。
Abstract:In this paper, the oscillation problem of DC solid-state power controller (SSPC) based on Cascode Gallium Nitride high electron mobility transistor (Cascode GaN HEMT) during the turn-on process is analyzed. The SPICE model and Q3D software are used to extract the internal parasitic parameters of the Cascode structure. Combining the actual working conditions of the DC SSPC and the Cascode structure, the turn-on and turn-off process of the SSPC is simulated and analyzed in the Saber software. The simulation results show that one of the causes of the oscillation is that Cascode GaN HEMT works in the saturation region for a long time during the SSPC turn-on process, and is so susceptible to external interference to cause oscillation, and the another cause is a positive feedback loop inside . To solve this problem, the scheme of paralleling RC absorption circuit and increasing gate drive resistance is proposed. Experimental verification shows that the proposed scheme can effectively suppress the oscillation.
赵瑞博, 王莉, 黄瑞. 直流固态功率控制器中Cascode型GaN HEMT开关过程的振荡问题[J]. 电工技术学报, 2022, 37(zk1): 267-276.
Zhao Ruibo, Wang Li, Huang Rui. Cascode GaN HEMT Switching Process Oscillation in DC Solid State Power Controller. Transactions of China Electrotechnical Society, 2022, 37(zk1): 267-276.
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