Protection circuit of normally-on SiC JFET using an inrush current

A protection circuit for the normally-on SiC JFET is proposed in this paper. The protection circuit uses an inrush current that charges DC link capacitor in the initial time. Most of all, the normally-on SiC JFET can be protected using this current. But the inrush current is not generated under the special condition when the line voltage starts at zero magnitude of voltage. Another protection circuit is added to doubly protect SiC JFET under the condition. The experimental result shows that the proposed protection circuit has good performances.

[1]  B. Piepenbreier,et al.  Fast gate drive for SiC-JFET using a conventional driver for MOSFETs and additional protections , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[2]  Johann W. Kolar,et al.  A gate drive circuit for silicon carbide JFET , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[3]  Chau-Shing Wang,et al.  Incandescent lamp flicker mitigation and measurement , 2004, IEEE Transactions on Instrumentation and Measurement.

[4]  Michael S. Mazzola,et al.  Assessment of "Normally On" and "Quasi On" SiC VJFET's in Half-Bridge Circuits , 2004 .

[5]  Cemal Basaran,et al.  High-temperature, high-density packaging of a 60kW converter for >200°C embedded operation , 2006 .

[6]  J.H. Zhao,et al.  Characterization of normally-off SiC vertical JFET devices and inverter circuits , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[7]  M.S. Mazzola,et al.  Inherently safe DC/DC converter using a normally-on SiC JFET , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[8]  M.S. Mazzola,et al.  SiC JFET gate driver design for use in DC/DC converters , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[9]  J. Kolar,et al.  A SiC JFET driver for a 5 kW, 150 kHz three-phase PWM converter , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..