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In this work, the IGBT turn-on and turn-off waveforms are normalized in order to analyze the closed-loop gate drive switching losses. The relationships of energy losses and controlled switching speed, voltage overshoot, current overshoot are derived. Theoretical analysis results show good agreement with experimental results. The proposed analysis methodology and results can provide guidelines for...
To overcome the drawbacks of the conventional gate drive, in this paper a closed-loop gate control method is proposed. In this novel method, the switching speed, specifically di/dt, is measured from the voltage across the parasitic inductance of the IGBT module and a closed-loop control is employed to adaptively adjust the gate drive voltage to control the switching speed according to a preset control...
An active fault protection method is proposed to prevent the IGBTs from being damaged should they be under over-current and short circuit fault conditions. A closed-loop gate drive method is used to effectively control the IGBT turn-off switching speed independent of the fault type or resultant over-current level. Compared with conventional solutions, the proposed method can limit fault current level,...
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