Applying the 2D-Short Circuit Detection Method to SiC MOSFETs including an advanced Soft Turn Off

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 7Language: englishTyp: PDF

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Hofstetter, Patrick; Hain, Stefan; Bakran, Mark-M. (University of Bayreuth, Germany)

To address the problem of small short circuit withstand times of SiC MOSFETs, this paper presents a short circuit protection, which detects the fault close to the earliest time possible and turns off the device safely. For the detection, the 2D-short circuit detection method [1, 2] was adapted to SiC MOSFETs. As SiC MOSFETs have to be turned off softly, a turn-off strategy is shown which is able to turn the device off during a short circuit type 1 and a short circuit type 2 in an optimized way.