PSHC6S00 general thyristor firing board is a kind of thyristor trigger system that designed with the corn technology of 40-pin CMOS application specific integrated circuit (ASIC).It applies phase-locked loop(PLL) and multi-chip module (MCM) and is base on the logic relationship between three-phase synchronous signal locked by the voltage control oscillator(VCO). It consist of phase reference(reference)circuit, buffer amplifier, soft start/stopf circuit, phase-locked loop, open-phase detection ,prohibited circuit, phase-sequence detection, select switch, monitoring circuit , pulse amplifier and pulse transformer. It has a 0-5V DC input voltage signal, can control the phase-shift of output pulse from 5°-175° adjustable. And any adjustor or manual output voltage can connect to with it easily (including the D/A signal by the computer) to control the operation of high power thyristor.The firing board form a good buffer interface between the adjustor or computer PID adjustment and the high power thyristor to ensure the safety of system when the adjustor are out of control.
The features of PSHC6S00 thyristor firing board are summarized in below:
With the three-phase trigger pulse being outputted by high frequency synchronous pulse, it has a high degree of symmetry ,balance and control linearity, overcoming many shortages of tradition simulation circuit.
The driver is synchronized with power network automatically by connecting the synchronous signal that gets from the high resistance R31-R33 directly with the main circuit of the thyristor(no seperate line), so it needs no synchronous transformer.It has matching automatic monitor ability to make the line between the main circuit and adjustor simple and reliable without any adjustment and measurement. And different resistance are adopted according to different main circuit line voltage of high resistance R31-R33 , we can see it from the table below: |
Thyristor driver
Adopt application specific integrated circui (ASIC) design
