公开(公告)号：US20220113345A1

公开(公告)日：2022-04-14

申请号：US17500110

申请日：2021-10-13

申请人： ANDRITZ HYDRO CANADA INC.

发明人： Jean-Francois St-Roch ,  Aurelien Carte ,  Quentin Bricard ,  Handy Fortin Blanchette

IPC分类号： G01R31/26 ,  H03K17/72 ,  G01R19/14

摘要： A system for monitoring polarization and conduction of a thyristor includes a transformer configured to generate a secondary current from a triggering current waveform applied to a gate of the thyristor; a converter configured to convert the secondary current into a monitored voltage; a first hysteresis comparator configured to generate a first voltage pulse based on the monitored voltage when the triggering current waveform includes a first current pulse; a second hysteresis comparator configured to generate one or more second voltage pulses based on the monitored voltage when the triggering current waveform includes one or more second current pulses; a monitoring unit configured to receive the first and the one or more second voltage pulses, and determine whether the triggering current waveform satisfies pre-defined characteristics, and to determine whether a current flowing between the anode and cathode of the thyristor satisfies additional pre-defined characteristics.