double trigger
2.In path 3,the signal is inputted GATE0 and GATE1 in 8253 through Double-D-Trigger and a AND Gate,and the Digital Signal Processor (DSP)system interface,then the rotating speed of rotor is counted by them,so that the high precision measurement of the extensive rotating speed with fast change is realized.
3.Using the Digital Technology improves the performance traditional thyristor welding machine, according to the characters of the double inverse star from rectifier circuit, set the parameters with micro-controller accurately, design the dependable trigger circuit, lead the feedback of voltage for the operation program, so the voltage of main circuit be carried out very steadily.
