An Improved Gate Drive Circuit Using an Air Core Reactor Developed for High Power GTO Thyristors

Hirofumi MATSUO  Fujio KUROKAWA  Katsuji IIDA  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.1   pp.196-202
Publication Date: 2006/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.1.196
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Energy in Electronics Communications
GTO thyristor,  gate drive circuit,  air core reactor,  hysteresis comparator,  

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This paper presents an improved gate drive circuit for high power GTO thyristors. The energy-storage/transfer characteristics of an air-core reactor and the fast switching characteristics of FET are employed to make a high gate current of sharp pulse form. The power loss in the gate drive circuit is reduced by using the low resistance and the hysteresis comparator to detect and control the steady on-gate current. The proposed gate drive circuit is analyzed and its usefulness is confirmed by experiments.