关键词: EAST快控电源, 电流模式, 电压模式, Bang-Bang控制, 限流控制

Abstract:

Aiming at the requirements of large current and fast response for the fast control power supply for EAST, the second generation supply could apply voltage control mode to achieve the maximum of current rising rate, while active feedback power of plasma’s vertical displacement retained current control mode, which was used in the first generation of fast control power supply for EAST. To solve the problem of overvoltage protection caused directly by the reverse energy produced by the frequent overcurrent protection when the power supply outputs high voltage, current limiting protection was applied. Experimental results prove that voltage mode can greatly improve the ability of power supply to restrain plasma's vertical unstable displacement.

Key words: Fast control power supply for EAST, Current mode, Voltage mode, Bang-Bang control, Current limiting control