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SiCMOSFET,SiCoolMOS和IGBT的特性对比及其在DAB变换器中的应用

, PP. 41-50

Keywords: SiC,MOSFET,CoolMOS,IGBT,特性,DAB变换器

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Abstract:

碳化硅(SiC)半导体器件由于其宽禁带材料的优良特性受到了广泛关注.SiC半导体器件作为一种新型器件,对其与Si半导体器件的特性对比及评估越来越有必要.本文主要对比了SiCMOSFET,SiCoolMOS和IGBT的静态特性.并搭建了基于Buck变换器的测试平台,测试条件为输入电压为400V,电流为4~10A,对比了三种器件的开关波形,开关时间,开关损耗,dv/dt,di/dt以及内部二极管的反向恢复特性.设计了一台2kW的双主动全桥(DAB)变换器的实验样机,对比了应用三种器件的DAB变换器的理论效率和实测效率.

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