RESEARCH ON ADAPTIVE VARIABLE RESISTANCE ACTIVE DRIVE CIRCUIT FOR OPTIMIZING IGBT SWITCHING PERFORMANCE
A novel adaptive active gate driving circuit(NAAGD)is proposed for current and voltage oscillations during IGBT turn-on.The circuit combines the voltage and current information of the complementary IGBT to switch on the drive resistor,which can realize the suppression of the open-pass current and voltage oscillation,and can adapt to the change of voltage and current level.Compared with the existing Active Gate Drive(AGD)scheme,the adaptive response of NAAGD has better immediacy.At the same time,compared with the conventional Gate Drive(CGD),the method of increasing the drive resistance to suppress oscillation is optimized,and the turn-on loss is optimized.Experiments verify the effectiveness of the proposed NAAGD.
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