Selective commutation circuit for an inverter

Details Selective commutation circuit for an inverter Selective commutation circuit for an inverter

H - Electricity

02

M

321/51

H02M 7/527 (2006.01) H02M 7/48 (2006.01)

Patent

CA 1150354

SELECTIVE COMMUTATION CIRCUIT FOR AN INVERTER ABSTRACT OF THE DISCLOSURE The commutation circuit of an inverter is actuated only when the main thyristors cannot be transitioned to the noncon- ducting state by the removal of the gate signal. If a commu- tation pulse is required, the commutation capacitors are charged to the appropriate voltage level immediately prior to the switching point so that they may provide a sufficient pulse of current to extinguish the current through the thyristor. The commutation capacitors are then returned to a stable voltage level until another commutation pulse is required. C-699

352992

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