Understanding Turn-On Transients of SiC High-Power Modules: Drain-Source Voltage Plateau Characteristics

Energies

Kuang Sheng¹  Qing Guo¹  Na Ren¹  Maosheng Zhang¹ 

[1] College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;

关键词: power module;    silicon carbide;    turn-on transient;   

DOI  :  10.3390/en13153802

来源: DOAJ

【 摘 要 】

The SiC (silicon carbide) high-power module has great potential to replace the IGBT (insulated gate bipolar transistor) power module in high-frequency and high-power applications, due to the superior properties of fast switching and low power loss, however, when the SiC high-power module operates under inappropriate conditions, the advantages of the SiC high-power module will be probably eliminated. In this paper, four kinds of SiC high-power modules are fabricated to investigate fast switching performance. The variations in characteristics of drain-source voltage at turn-on transient under the combined conditions of multiple factors are studied. A characteristic of voltage plateau is observed from the drain-source voltage waveform at turn-on transient in the experiments, and the characteristic is reproduced by simulation. The mechanism behind the voltage plateau is studied, and it is revealed that the characteristic of drain-source voltage plateau is a reflection of the miller plateau effect of gate-source voltage on drain-source voltage under the combined conditions of fast turn-on speed and low DC bus voltage, while the different values of drain-source voltage plateau are attributed to the discrepancy of structure between upper-side and lower-side in the corresponding partial path of the drain circuit loop inside the module, with the standard 62 mm package outline.

【 授权许可】

Unknown