| 摘要 |
PURPOSE:To visually confirm gate pulses directly applied to each thyristor by the naked eyes of an operator to check them by connecting light emitting diodes to the secondary windings of pulse transformers corresponding to respective thyristors which are connected in series or in parallel. CONSTITUTION:A gate pulse signal generated by a gate pulse generating circuit 1 is supplied to the primary winding of each gate pulse transformer 6 and inputted to each thyristor 3 through the secondary winding, turning on each thyristor. A light emitting diode 5 connected to the secondary winding of each gate pulse transformer 6 lights up at the input of the gate pulse signal, so that the existence of a gate pulse signal corresponding to each thyristor can be checked by the naked eyes of an operator. |
