2007•IEEE Transactions on Power ElectronicsRequires access

Failure Analysis for the di/dt of Thyristor

Cailin Wang

Abstract

The di/dt capability and the failure mechanism of thyristor are analyzed,and the prevention measures from the di/dt failure are given.Based on the thyristor operating case in converter of power locomotive,the di/dt failure reason of thyristor is analyzed.The results show that the failure reason is related to the width and frequency of trigger pulses applied to the thyristors gate.

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Key concepts: Thyristor, Integrated gate-commutated thyristor, MOS-controlled thyristor, Gate turn-off thyristor, Thyristor drive, Failure mechanism, Static induction thyristor, Power (physics)