Circuit for controlling the application of firing pulses to controlled devices in a static converter operating in the inversion mode

Abstract

Abstract A circuit for controlling the application of firing pulses to controlled devices, e.g. thyristors or mercury valves, in a static convertor operating in its inversion mode. In particular, it comprises control means for developing the firing pulses 'at. an instant corresponding to a predetermined position occupied by each cycle of a waveform derived from a combination of components which are functions of the direct current flowing in the D.C. side of the "invertor" at a time instant immediately preceding the firing instant and the voltage across the device at the said time instant. The circuit is inherently predictive in its action and the object fulfilled by this invention is to so control the firing instants that the margin angle (defined herein) is maintained substantially constant even under conditions of asymmetry.

Inventors

• 👤 John Desmond Ainsworth

Bibliographic Details