SiC vs. Si - Evaluation of Potentials for Performance Improvement of Power Electronics Converter Systems by SiC Power Semiconductors


Article Preview

Switching devices based on wide band gap materials as SiC o er a signi cant perfor- mance improvement on the switch level compared to Si devices. A well known example are SiC diodes employed e.g. in PFC converters. In this paper, the impact on the system level perfor- mance, i.e. eciency/power density, of a PFC and of a DC-DC converter resulting with the new SiC devices is evaluated based on analytical optimisation procedures and prototype systems. There, normally-on JFETs by SiCED and normally-off JFETs by SemiSouth are considered.



Materials Science Forum (Volumes 645-648)

Edited by:

Anton J. Bauer, Peter Friedrichs, Michael Krieger, Gerhard Pensl, Roland Rupp and Thomas Seyller




J. Biela et al., "SiC vs. Si - Evaluation of Potentials for Performance Improvement of Power Electronics Converter Systems by SiC Power Semiconductors", Materials Science Forum, Vols. 645-648, pp. 1101-1106, 2010

Online since:

April 2010




[1] P. W. Research. [Online]. Available: http: /www. ecn. purdue. edu/WBG/Index. html.

[2] D. Marckx, Breakthrough in power electronics from SiC, National Renewable Energy Laboratory (NREL), Subcontract Report NREL/SR-500-38515, March (2006).

[3] J. Kolar, J. Biela, and J. Miniboeck, Exploring the pareto front of multi-objective single-phase pfc rectifier design optimization - 99. 2% efficiency vs. 7kW/dm3 power density, in Plenary Publication at the IEEE International Power Electronics and Motion Control Conference, May (2009).


[4] B. Wrzecionko, J. Biela, and J. W. Kolar, SiC power semiconductors in HEVs: Influence of junction temperature on power density, chip utilization and efficiency, in 35th Conference of the IEEE Industrial Electronics Society (IECON). Porto, Portugal, Nov. (2009).


[5] U. Badstuebner, J. Biela, B. Faessler, D. Hoesli, and J. W. Kolar, An optimized 5kW, 147 W/in3 telecom phase-shift DC-DC converter with magnetically integrated current doubler, in Proc. 24th IEEE Applied Power Electronics Conference and Exposition APEC, (2009).


[6] J. Biela, U. Badstuebner, and J. Kolar, Impact of power density maximization on efficiency of DC-DC converter systems, IEEE Transactions on Power Electronics, Vol. 24 (2009), pp.288-300.