A 1-MHz hard-switched silicon carbide DC-DC converter

被引:57
作者
Abou-Alfotouh, Ahmed M. [1 ]
Radun, Arthur V.
Chang, Hsueh-Rong
Winterhalter, Craig
机构
[1] Enpirion Inc, Bridgewater, NJ 08807 USA
[2] Univ Kentucky, Dept Elect & Comp Engn, Lexington, KY 40506 USA
[3] Rockwell Sci, Thousand Oaks, CA 91360 USA
[4] Capstoneturbine Corp, Chatsworth, CA 91311 USA
关键词
DC-DC converter; power electronics; power semiconductors; silicon carbide (SiC); switched;
D O I
10.1109/TPEL.2006.876891
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Silicon Carbide (SiC) is a wide bandgap semiconductor material that offers performance improvements over Si for power semiconductors with accompanying benefits for power electronics applications that use these semiconductors. The wide bandgap of SiC results in higher junction forward voltage drops, so SiC is best suited for majority carrier devices such as field effect transistors (FETs) and Schottky diodes. The wide bandgap of SiC results in it having a high breakdown electric field, which in turn results in lower resistivity and narrower drift regions in power devices. This dramatically lowers the resistance of the drift region and means that SiC devices with substantially less area than their corresponding Si devices can be used. The lower device area reduces the capacitance of the devices enabling higher frequency operation. Here, the results from a 1-MHz hard-switched dc-dc converter employing SiC JFETs and Schottky diodes will be presented. This converter was designed to convert 270 Vdc to 42 Vdc such as may be needed in future electric cars. The results provide the performance obtained at 1 MHz and demonstrate the feasibility of a hard-switched dc-dc converter operating at this frequency.
引用
收藏
页码:880 / 889
页数:10
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