To address safety issue of DC networks in distribution and generation plants, a specific Current Limiting FET has been design. The fabricated power switch is able to operate in both forward and reverse conduction mode. Short-circuit time to failure has been adjust and a current sensing electrode as been added to ease the monitoring and the drive of this switch. Fabricated devices have been packaged in TO3 metal can, providing good heat conduction and durability. A maximum short circuit energy of 70J/cm2 as been measured for a IN = 6 A VBR = 1800 V rated device, corresponding to a short-circuit time before failure of tCC = 21ms under VDC = 300 V .

SiC Current Limiting FETs (CLFs) for DC Applications

The expansion of the electrical communications and distribution networks strongly contribute to the increase in the risks of appearance of defaults, such as over-voltage and/or over-current These developments promote the emergence of safety devices for serial protection commonly named Current Limiting Devices (CLD's) This work presents the design, manufacture and characterization of silicon carbide accuMOSFET of high power density ratings Components able to limit the current Lip to 450A @ 350V were manufactured and characterized Specific characterization test benches were developed, able to provide high energy Pulses required for characterization CLDs behavior subjected to short overloads has been measured experimentally and analyzed be means of simulations for long-time overloads A maximum sustainable high energy of 35 Joules has been estimated This achievement give opportunities to build new architectures of serial protection systems

High Power Density SiC 450A AccuMOSFET for Current Limiting Applications

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High Power Density SiC 450A AccuMOSFET for Current Limiting Applications