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Characterization of a Gallium Nitride Half-Bridge module for use in a Multi-Freqeuncy Multilevel Modular Converter

Bussink, E (2017) Characterization of a Gallium Nitride Half-Bridge module for use in a Multi-Freqeuncy Multilevel Modular Converter.

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Abstract:This reports shows measurements done on a gallium nitride half-bridge module, these measurements will be the basis of EMI research of modules like this in a Multi-frequency Multilevel Modular Converter (M3C) system, which will be a corner stone of a Smart Grid. Devices have to obey many rules and regulations to be Electromagnetic Compatible (EMC), this makes versatility and controllability of signals within a device a must in the design of such devices. This report gives some insight in the ringing effects on the output with frequencies from 10 kHz up to 1 MHz, done with both the internal PWM generator and an FPGA as PWM input. Ringing can be a cause of Electromagnetic Interference (EMI). The FPGA is used to verify its capability for being used as an input for the GaN module, since the FPGA is easily programmable which results in easy manipulationof signals. The ringing shows to be independent on frequency but dependent on dV dt of the output. Furthermore the FPGA is capable of generating a PWM signal with a frequency of up to 1 MHz without introducing different ringing, showing a viable option as input generator. At last some measurements with variable dead time are show which are done with the FPGA. The variation in dead time has shown to be a viable way of decreasing overshoot at the output thus being able to influence EMI.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering BSc (56953)
Link to this item:http://purl.utwente.nl/essays/73667
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