DEVICE FOR THE CONTROL OF LINE-COMMUTATED CONVERTERS

摘要

In a device for the control of line-commutated converters, the fundamental of the line voltage vector is filtered out by a vector phase filter and is shifted back in phase by an angle corresponding to the desired firing delay angle by a vector rotator as a function of a DC control voltage. The output of the vector rotator then exercises control via an angle switch which determines the trigger pulses of the converter valves at definite, recurring angular positions of the vector quantity fed to it. The control is independent of the wave shape and the frequency of the system.