Current Source Gate Drive Circuit for Simultaneous Firing of Thyristors

摘要

A current source gate drive circuit (80) includes tow current loops (72), eachof which serves as a current transformer primary. Electrically insulatingtubes (76) enclose the current loops (72). Current transformer cores (74),around which are wound a certain number of secondary turns, surround thecurrent loops (72). Thyristor gate driver circuits (70) are electricallycoupled to the current transformer cores. Each of the driver circuits (70)receives and rectifies ac current signals for the current loops (70) and formsa current pulse train firing signal. A current pulse shaping circuit (64) isconnected to the current loops and uses dual resonant LC circuits to generatethe ac current signals.